Search

Your search keyword '"Wich, Serge A."' showing total 678 results
Start Over Author "Wich, Serge A."
678 results on '"Wich, Serge A."'

1. Harnessing Artificial Intelligence for Wildlife Conservation

Author

Fergus, Paul, Chalmers, Carl, Longmore, Steve, and Wich, Serge

Subjects
Computer Science - Computer Vision and Pattern Recognition, Computer Science - Artificial Intelligence
Abstract

The rapid decline in global biodiversity demands innovative conservation strategies. This paper examines the use of artificial intelligence (AI) in wildlife conservation, focusing on the Conservation AI platform. Leveraging machine learning and computer vision, Conservation AI detects and classifies animals, humans, and poaching-related objects using visual spectrum and thermal infrared cameras. The platform processes this data with convolutional neural networks (CNNs) and Transformer architectures to monitor species, including those which are critically endangered. Real-time detection provides the immediate responses required for time-critical situations (e.g. poaching), while non-real-time analysis supports long-term wildlife monitoring and habitat health assessment. Case studies from Europe, North America, Africa, and Southeast Asia highlight the platform's success in species identification, biodiversity monitoring, and poaching prevention. The paper also discusses challenges related to data quality, model accuracy, and logistical constraints, while outlining future directions involving technological advancements, expansion into new geographical regions, and deeper collaboration with local communities and policymakers. Conservation AI represents a significant step forward in addressing the urgent challenges of wildlife conservation, offering a scalable and adaptable solution that can be implemented globally., Comment: 13 pages, 13 figures

Published
2024

2. Removing Human Bottlenecks in Bird Classification Using Camera Trap Images and Deep Learning

Author

Chalmers, Carl, Fergus, Paul, Wich, Serge, Longmore, Steven N, Walsh, Naomi Davies, Stephens, Philip, Sutherland, Chris, Matthews, Naomi, Mudde, Jens, and Nuseibeh, Amira

Subjects
Computer Science - Computer Vision and Pattern Recognition, Computer Science - Artificial Intelligence
Abstract

Birds are important indicators for monitoring both biodiversity and habitat health; they also play a crucial role in ecosystem management. Decline in bird populations can result in reduced eco-system services, including seed dispersal, pollination and pest control. Accurate and long-term monitoring of birds to identify species of concern while measuring the success of conservation interventions is essential for ecologists. However, monitoring is time consuming, costly and often difficult to manage over long durations and at meaningfully large spatial scales. Technology such as camera traps, acoustic monitors and drones provide methods for non-invasive monitoring. There are two main problems with using camera traps for monitoring: a) cameras generate many images, making it difficult to process and analyse the data in a timely manner; and b) the high proportion of false positives hinders the processing and analysis for reporting. In this paper, we outline an approach for overcoming these issues by utilising deep learning for real-time classi-fication of bird species and automated removal of false positives in camera trap data. Images are classified in real-time using a Faster-RCNN architecture. Images are transmitted over 3/4G cam-eras and processed using Graphical Processing Units (GPUs) to provide conservationists with key detection metrics therefore removing the requirement for manual observations. Our models achieved an average sensitivity of 88.79%, a specificity of 98.16% and accuracy of 96.71%. This demonstrates the effectiveness of using deep learning for automatic bird monitoring.

Published
2023

3. Empowering Wildlife Guardians: An Equitable Digital Stewardship and Reward System for Biodiversity Conservation using Deep Learning and 3/4G Camera Traps

Author

Fergus, Paul, Chalmers, Carl, Longmore, Steven, Wich, Serge, Warmenhove, Carmen, Swart, Jonathan, Ngongwane, Thuto, Burger, André, Ledgard, Jonathan, and Meijaard, Erik

Subjects
Computer Science - Artificial Intelligence, Computer Science - Computer Vision and Pattern Recognition
Abstract

The biodiversity of our planet is under threat, with approximately one million species expected to become extinct within decades. The reason; negative human actions, which include hunting, overfishing, pollution, and the conversion of land for urbanisation and agricultural purposes. Despite significant investment from charities and governments for activities that benefit nature, global wildlife populations continue to decline. Local wildlife guardians have historically played a critical role in global conservation efforts and have shown their ability to achieve sustainability at various levels. In 2021, COP26 recognised their contributions and pledged US$1.7 billion per year; however, this is a fraction of the global biodiversity budget available (between US$124 billion and US$143 billion annually) given they protect 80% of the planets biodiversity. This paper proposes a radical new solution based on "Interspecies Money," where animals own their own money. Creating a digital twin for each species allows animals to dispense funds to their guardians for the services they provide. For example, a rhinoceros may release a payment to its guardian each time it is detected in a camera trap as long as it remains alive and well. To test the efficacy of this approach 27 camera traps were deployed over a 400km2 area in Welgevonden Game Reserve in Limpopo Province in South Africa. The motion-triggered camera traps were operational for ten months and, using deep learning, we managed to capture images of 12 distinct animal species. For each species, a makeshift bank account was set up and credited with {\pounds}100. Each time an animal was captured in a camera and successfully classified, 1 penny (an arbitrary amount - mechanisms still need to be developed to determine the real value of species) was transferred from the animal account to its associated guardian., Comment: 28 pages and 12 figures

Published
2023

4. Consistent patterns of common species across tropical tree communities

Author

Cooper, Declan L. M., Lewis, Simon L., Sullivan, Martin J. P., Prado, Paulo I., ter Steege, Hans, Barbier, Nicolas, Slik, Ferry, Sonké, Bonaventure, Ewango, Corneille E. N., Adu-Bredu, Stephen, Affum-Baffoe, Kofi, de Aguiar, Daniel P. P., Ahuite Reategui, Manuel Augusto, Aiba, Shin-Ichiro, Albuquerque, Bianca Weiss, de Almeida Matos, Francisca Dionízia, Alonso, Alfonso, Amani, Christian A., do Amaral, Dário Dantas, do Amaral, Iêda Leão, Andrade, Ana, de Andrade Miranda, Ires Paula, Angoboy, Ilondea B., Araujo-Murakami, Alejandro, Arboleda, Nicolás Castaño, Arroyo, Luzmila, Ashton, Peter, Aymard C, Gerardo A., Baider, Cláudia, Baker, Timothy R., Balinga, Michael Philippe Bessike, Balslev, Henrik, Banin, Lindsay F., Bánki, Olaf S., Baraloto, Chris, Barbosa, Edelcilio Marques, Barbosa, Flávia Rodrigues, Barlow, Jos, Bastin, Jean-Francois, Beeckman, Hans, Begne, Serge, Bengone, Natacha Nssi, Berenguer, Erika, Berry, Nicholas, Bitariho, Robert, Boeckx, Pascal, Bogaert, Jan, Bonyoma, Bernard, Boundja, Patrick, Bourland, Nils, Boyemba Bosela, Faustin, Brambach, Fabian, Brienen, Roel, Burslem, David F. R. P., Camargo, José Luís, Campelo, Wegliane, Cano, Angela, Cárdenas, Sasha, Cárdenas López, Dairon, de Sá Carpanedo, Rainiellen, Carrero Márquez, Yrma Andreina, Carvalho, Fernanda Antunes, Casas, Luisa Fernanda, Castellanos, Hernán, Castilho, Carolina V., Cerón, Carlos, Chapman, Colin A., Chave, Jerome, Chhang, Phourin, Chutipong, Wanlop, Chuyong, George B., Cintra, Bruno Barçante Ladvocat, Clark, Connie J., Coelho de Souza, Fernanda, Comiskey, James A., Coomes, David A., Cornejo Valverde, Fernando, Correa, Diego F., Costa, Flávia R. C., Costa, Janaina Barbosa Pedrosa, Couteron, Pierre, Culmsee, Heike, Cuni-Sanchez, Aida, Dallmeier, Francisco, Damasco, Gabriel, Dauby, Gilles, Dávila, Nállarett, Dávila Doza, Hilda Paulette, De Alban, Jose Don T., de Assis, Rafael L., De Canniere, Charles, De Haulleville, Thales, de Jesus Veiga Carim, Marcelo, Demarchi, Layon O., Dexter, Kyle G., Di Fiore, Anthony, Din, Hazimah Haji Mohammad, Disney, Mathias I., Djiofack, Brice Yannick, Djuikouo, Marie-Noël K., Do, Tran Van, Doucet, Jean-Louis, Draper, Freddie C., Droissart, Vincent, Duivenvoorden, Joost F., Engel, Julien, Estienne, Vittoria, Farfan-Rios, William, Fauset, Sophie, Feeley, Kenneth J., Feitosa, Yuri Oliveira, Feldpausch, Ted R., Ferreira, Cid, Ferreira, Joice, Ferreira, Leandro Valle, Fletcher, Christine D., Flores, Bernardo Monteiro, Fofanah, Alusine, Foli, Ernest G., Fonty, Émile, Fredriksson, Gabriella M., Fuentes, Alfredo, Galbraith, David, Gallardo Gonzales, George Pepe, Garcia-Cabrera, Karina, García-Villacorta, Roosevelt, Gomes, Vitor H. F., Gómez, Ricardo Zárate, Gonzales, Therany, Gribel, Rogerio, Guedes, Marcelino Carneiro, Guevara, Juan Ernesto, Hakeem, Khalid Rehman, Hall, Jefferson S., Hamer, Keith C., Hamilton, Alan C., Harris, David J., Harrison, Rhett D., Hart, Terese B., Hector, Andy, Henkel, Terry W., Herbohn, John, Hockemba, Mireille B. N., Hoffman, Bruce, Holmgren, Milena, Honorio Coronado, Euridice N., Huamantupa-Chuquimaco, Isau, Hubau, Wannes, Imai, Nobuo, Irume, Mariana Victória, Jansen, Patrick A., Jeffery, Kathryn J., Jimenez, Eliana M., Jucker, Tommaso, Junqueira, André Braga, Kalamandeen, Michelle, Kamdem, Narcisse G., Kartawinata, Kuswata, Kasongo Yakusu, Emmanuel, Katembo, John M., Kearsley, Elizabeth, Kenfack, David, Kessler, Michael, Khaing, Thiri Toe, Killeen, Timothy J., Kitayama, Kanehiro, Klitgaard, Bente, Labrière, Nicolas, Laumonier, Yves, Laurance, Susan G. W., Laurance, William F., Laurent, Félix, Le, Tinh Cong, Le, Trai Trong, Leal, Miguel E., Leão de Moraes Novo, Evlyn Márcia, Levesley, Aurora, Libalah, Moses B., Licona, Juan Carlos, Lima Filho, Diógenes de Andrade, Lindsell, Jeremy A., Lopes, Aline, Lopes, Maria Aparecida, Lovett, Jon C., Lowe, Richard, Lozada, José Rafael, Lu, Xinghui, Luambua, Nestor K., Luize, Bruno Garcia, Maas, Paul, Magalhães, José Leonardo Lima, Magnusson, William E., Mahayani, Ni Putu Diana, Makana, Jean-Remy, Malhi, Yadvinder, Maniguaje Rincón, Lorena, Mansor, Asyraf, Manzatto, Angelo Gilberto, Marimon, Beatriz S., Marimon-Junior, Ben Hur, Marshall, Andrew R, Martins, Maria Pires, Mbayu, Faustin M., de Medeiros, Marcelo Brilhante, Mesones, Italo, Metali, Faizah, Mihindou, Vianet, Millet, Jerome, Milliken, William, Mogollón, Hugo F., Molino, Jean-François, Mohd. Said, Mohd. Nizam, Monteagudo Mendoza, Abel, Montero, Juan Carlos, Moore, Sam, Mostacedo, Bonifacio, Mozombite Pinto, Linder Felipe, Mukul, Sharif Ahmed, Munishi, Pantaleo K. T., Nagamasu, Hidetoshi, Nascimento, Henrique Eduardo Mendonça, Nascimento, Marcelo Trindade, Neill, David, Nilus, Reuben, Noronha, Janaína Costa, Nsenga, Laurent, Núñez Vargas, Percy, Ojo, Lucas, Oliveira, Alexandre A., de Oliveira, Edmar Almeida, Ondo, Fidèle Evouna, Palacios Cuenca, Walter, Pansini, Susamar, Pansonato, Marcelo Petratti, Paredes, Marcos Ríos, Paudel, Ekananda, Pauletto, Daniela, Pearson, Richard G., Pena, José Luis Marcelo, Pennington, R. Toby, Peres, Carlos A., Permana, Andrea, Petronelli, Pascal, Peñuela Mora, Maria Cristina, Phillips, Juan Fernando, Phillips, Oliver L., Pickavance, Georgia, Piedade, Maria Teresa Fernandez, Pitman, Nigel C. A., Ploton, Pierre, Popelier, Andreas, Poulsen, John R., Prieto, Adriana, Primack, Richard B., Priyadi, Hari, Qie, Lan, Quaresma, Adriano Costa, de Queiroz, Helder Lima, Ramirez-Angulo, Hirma, Ramos, José Ferreira, Reis, Neidiane Farias Costa, Reitsma, Jan, Revilla, Juan David Cardenas, Riutta, Terhi, Rivas-Torres, Gonzalo, Robiansyah, Iyan, Rocha, Maira, Rodrigues, Domingos de Jesus, Rodriguez-Ronderos, M. Elizabeth, Rovero, Francesco, Rozak, Andes H., Rudas, Agustín, Rutishauser, Ervan, Sabatier, Daniel, Sagang, Le Bienfaiteur, Sampaio, Adeilza Felipe, Samsoedin, Ismayadi, Satdichanh, Manichanh, Schietti, Juliana, Schöngart, Jochen, Scudeller, Veridiana Vizoni, Seuaturien, Naret, Sheil, Douglas, Sierra, Rodrigo, Silman, Miles R., Silva, Thiago Sanna Freire, da Silva Guimarães, José Renan, Simo-Droissart, Murielle, Simon, Marcelo Fragomeni, Sist, Plinio, Sousa, Thaiane R., de Sousa Farias, Emanuelle, de Souza Coelho, Luiz, Spracklen, Dominick V., Stas, Suzanne M., Steinmetz, Robert, Stevenson, Pablo R., Stropp, Juliana, Sukri, Rahayu S., Sunderland, Terry C. H., Suzuki, Eizi, Swaine, Michael D., Tang, Jianwei, Taplin, James, Taylor, David M., Tello, J. Sebastián, Terborgh, John, Texier, Nicolas, Theilade, Ida, Thomas, Duncan W., Thomas, Raquel, Thomas, Sean C., Tirado, Milton, Toirambe, Benjamin, de Toledo, José Julio, Tomlinson, Kyle W., Torres-Lezama, Armando, Tran, Hieu Dang, Tshibamba Mukendi, John, Tumaneng, Roven D., Umaña, Maria Natalia, Umunay, Peter M., Urrego Giraldo, Ligia Estela, Valderrama Sandoval, Elvis H., Valenzuela Gamarra, Luis, Van Andel, Tinde R., van de Bult, Martin, van de Pol, Jaqueline, van der Heijden, Geertje, Vasquez, Rodolfo, Vela, César I. A., Venticinque, Eduardo Martins, Verbeeck, Hans, Veridiano, Rizza Karen A., Vicentini, Alberto, Vieira, Ima Célia Guimarães, Vilanova Torre, Emilio, Villarroel, Daniel, Villa Zegarra, Boris Eduardo, Vleminckx, Jason, von Hildebrand, Patricio, Vos, Vincent Antoine, Vriesendorp, Corine, Webb, Edward L., White, Lee J. T., Wich, Serge, Wittmann, Florian, Zagt, Roderick, Zang, Runguo, Zartman, Charles Eugene, Zemagho, Lise, Zent, Egleé L., and Zent, Stanford

Published
2024
Full Text
View/download PDF

8. Conservation AI: Live Stream Analysis for the Detection of Endangered Species Using Convolutional Neural Networks and Drone Technology

Author

Chalmers, C., Fergus, P., Wich, Serge, and Montanez, Aday Curbelo

Subjects
Computer Science - Computer Vision and Pattern Recognition
Abstract

Many different species are adversely affected by poaching. In response to this escalating crisis, efforts to stop poaching using hidden cameras, drones and DNA tracking have been implemented with varying degrees of success. Limited resources, costs and logistical limitations are often the cause of most unsuccessful poaching interventions. The study presented in this paper outlines a flexible and interoperable framework for the automatic detection of animals and poaching activity to facilitate early intervention practices. Using a robust deep learning pipeline, a convolutional neural network is trained and implemented to detect rhinos and cars (considered an important tool in poaching for fast access and artefact transportation in natural habitats) in the study, that are found within live video streamed from drones Transfer learning with the Faster RCNN Resnet 101 is performed to train a custom model with 350 images of rhinos and 350 images of cars. Inference is performed using a frame sampling technique to address the required trade-off control precision and processing speed and maintain synchronisation with the live feed. Inference models are hosted on a web platform using flask web serving, OpenCV and TensorFlow 1.13. Video streams are transmitted from a DJI Mavic Pro 2 drone using the Real-Time Messaging Protocol (RMTP). The best trained Faster RCNN model achieved a mAP of 0.83 @IOU 0.50 and 0.69 @IOU 0.75 respectively. In comparison an SSD-mobilenetmodel trained under the same experimental conditions achieved a mAP of 0.55 @IOU .50 and 0.27 @IOU 0.75.The results demonstrate that using a FRCNN and off-the-shelf drones is a promising and scalable option for a range of conservation projects., Comment: The papaer is 10 pages and contains 11 images and 1 table

Published
2019

9. Predicting range shifts of African apes under global change scenarios

Author

Carvalho, Joana S., Graham, Bruce, Bocksberger, Gaёlle, Maisels, Fiona, Williamson, Elizabeth A., Wich, Serge, Sop, Tenekwetche, Amarasekaran, Bala, Barca, Benjamin, Barrie, Abdulai, Bergl, Richard A., Boesch, Christophe, Boesch, Hedwige, Brncic, Terry M., Buys, Bartelijntje, Chancellor, Rebecca, Danquah, Emmanuel, Doumbé, Osiris A., Le-Duc, Stephane Y., Galat-Luong, Anh, Ganas, Jessica, Gatti, Sylvain, Ghiurghi, Andrea, Goedmakers, Annemarie, Granier, Nicolas, Hakizimana, Dismas, Haurez, Barbara, Head, Josephine, Herbinger, Ilka, Hillers, Annika, Jones, Sorrel, Junker, Jessica, Maputla, Nakedi, Manasseh, Eno-Nku, McCarthy, Maureen S., Molokwu-Odozi, Mary, Morgan, Bethan J., Nakashima, Yoshihiro, N’Goran, Paul K., Nixon, Stuart, Nkembi, Louis, Normand, Emmanuelle, Nzooh, Laurent D.Z., Olson, Sarah H., Payne, Leon, Petre, Charles-Albert, Piel, Alex K., Pintea, Lilian, Plumptre, Andrew J., Rundus, Aaron, Serckx, Adeline, Stewart, Fiona A., Sunderland-Groves, Jacqueline, Tagg, Nikki, Todd, Angelique, Vosper, Ashley, Wenceslau, José F.C., Wessling, Erin G., Willie, Jacob, and Kühl, Hjalmar S.

Published
2021

10. Exploring the opportunities and risks of aerial monitoring for biodiversity conservation

Author

Millner Naomi, Cunliffe Andrew M., Mulero-Pázmány Margarita, Newport Ben, Sandbrook Chris, and Wich Serge

Subjects
drones, biodiversity conservation, interdisciplinarity, monitoring technologies, digital governance, Economic growth, development, planning, HD72-88, Social history and conditions. Social problems. Social reform, HN1-995
Abstract

Drones are unoccupied aerial systems (UAS) whose technology has evolved rapidly over the past 15 years. Increasingly used in conservation to manage and monitor biodiversity, drones offer rich capabilities to observe in difficult terrain, have relatively affordable hardware costs and are likely to continue to proliferate rapidly in the years ahead. Drones are useful for tasks as diverse as monitoring wildlife poaching and illegal timber extraction, managing ecotourism and disaster responses, and tracking the regeneration or degradation of forests, and offer potential for more specialised tasks as their sensory payloads are developed. However, although associated technical issues and applications have been explored in wide-ranging ways within conservation science, there has been relatively little social-scientific engagement with drones to date. This leaves a gap surrounding the potential social benefits and risks of drones, as well as in interdisciplinary conversations. This introduction is the first of four papers under the heading ‘Drone ecologies’, building on an interdisciplinary workshop held under the same name at the University of Bristol in July 2021. Expanding from the plenary dialogues that opened this workshop, this introduction explores what interdisciplinary perspectives on drones can offer in addressing global social and ecological challenges, drawing on expertise from the fields of conservation biology, human and physical geography, rainforest ecology and environmental systems. Setting out the aims of the overall special collection, we review here the ways that drones are being used, and might be used, in biodiversity conservation, setting out important considerations to minimise risks of inadvertent harms.

Published
2023
Full Text
View/download PDF

11. Optimising observing strategies for monitoring animals using drone-mounted thermal infrared cameras

Author

Burke, Claire, Rashman, Maisie, Wich, Serge, Symons, Andy, Theron, Cobus, and Longmore, Steve

Subjects
Electrical Engineering and Systems Science - Signal Processing, Astrophysics - Instrumentation and Methods for Astrophysics
Abstract

The proliferation of relatively affordable off-the-shelf drones offers great opportunities for wildlife monitoring and conservation. Similarly the recent reduction in cost of thermal infrared cameras also offers new promise in this field, as they have the advantage over conventional RGB cameras of being able to distinguish animals based on their body heat and being able to detect animals at night. However, the use of drone-mounted thermal infrared cameras comes with several technical challenges. In this paper we address some of these issues, namely thermal contrast problems due to heat from the ground, absorption and emission of thermal infrared radiation by the atmosphere, obscuration by vegetation, and optimizing the flying height of drones for a best balance between covering a large area and being able to accurately image and identify animals of interest. We demonstrate the application of these methods with a case study using field data, and make the first ever detection of the critically endangered riverine rabbit (Bunolagus monticularis) in thermal infrared data. We provide a web-tool so that the community can easily apply these techniques to other studies (http://www.astro.ljmu.ac.uk/~aricburk/uav_calc/)., Comment: Accepted for publication in International Journal of Remote Sensing: Drones. 30 pages, 13 figures

Published
2018
Full Text
View/download PDF

12. Addressing environmental and atmospheric challenges for capturing high-precision thermal infrared data in the field of astro-ecology

Author

Burke, Claire, Rashman, Maisie F., McAree, Owen, Hambrecht, Leonard, Longmore, Steve N., Piel, Alex K., and Wich, Serge A.

Subjects
Astrophysics - Instrumentation and Methods for Astrophysics, Physics - Applied Physics
Abstract

Using thermal infrared detectors mounted on drones, and applying techniques from astrophysics, we hope to support the field of conservation ecology by creating an automated pipeline for the detection and identification of certain endangered species and poachers from thermal infrared data. We test part of our system by attempting to detect simulated poachers in the field. Whilst we find that we can detect humans hiding in the field in some types of terrain, we also find several environmental factors that prevent accurate detection, such as ambient heat from the ground, absorption of infrared emission by the atmosphere, obscuring vegetation and spurious sources from the terrain. We discuss the effect of these issues, and potential solutions which will be required for our future vision for a fully automated drone-based global conservation monitoring system., Comment: Published in Proceedings of SPIE Astronomical Telescopes and Instrumentation 2018. 8 pages, 3 figures

Published
2018

13. Protecting people and wildlife from the potential harms of drone use in biodiversity conservation: interdisciplinary dialogues

Author

Jackman Anna, Millner Naomi, Cunliffe Andrew M., Laumonier Yves, Lunstrum Elizabeth, Paneque-Gálvez Jaime, and Wich Serge A.

Subjects
drones, uavs, conservation ethics, interdisciplinarity, dialogue, Economic growth, development, planning, HD72-88, Social history and conditions. Social problems. Social reform, HN1-995
Abstract

In this policy intervention, we recount the process of producing a policy briefing targeting researchers and practitioners who use drones in biodiversity conservation. We use the writing process as a springboard to think through the ways that interdisciplinary exchange has and might further inform the ethical use of new technologies, such as drones. This approach is vital, we argue, because while drones may be deployed as tools that enable or empower forest, wildlife or habitat monitoring practices, so too can they be variously disruptive, repurposed and/or exceed these applications in significant ways. From questions of surveillance and capture, data ownership and security, to noise disruption, drone use requires careful and critical reflection, particularly in sensitive contexts. Yet, interdisciplinary exchange attentive to the ethical, social and experiential dimensions of drone use remains patchy and thin. To this end, this intervention reflects on the process of a group of scholars from ecological, environmental and social science backgrounds coming together in an interdisciplinary project grappling with diverse issues around responsible conservation drone use. After recounting our methodology, including the surprises and learning that emerged in practice, we contextualise the key themes we chose to foreground in our published policy briefing. We conclude by connecting our collaboration with wider actions and energies in the context of existing (conservation) drone policy and practice, while underscoring our contributions to existing work.

Published
2023
Full Text
View/download PDF

14. Sociality predicts orangutan vocal phenotype

Author

Lameira, Adriano R., Santamaría-Bonfil, Guillermo, Galeone, Deborah, Gamba, Marco, Hardus, Madeleine E., Knott, Cheryl D., Morrogh-Bernard, Helen, Nowak, Matthew G., Campbell-Smith, Gail, and Wich, Serge A.

Published
2022
Full Text
View/download PDF

16. Evaluating Thermal Infrared Drone Flight Parameters on Spider Monkey Detection in Tropical Forests.

Author

Pinel-Ramos, Eduardo José, Aureli, Filippo, Wich, Serge, Longmore, Steven, and Spaan, Denise

Subjects
INFRARED cameras, TROPICAL forests, VIDEO recording, MONKEYS, PRIMATES, COMMERCIAL drones
Abstract

Geoffroy's spider monkeys, an endangered, fast-moving arboreal primate species with a large home range and a high degree of fission–fusion dynamics, are challenging to survey in their natural habitats. Our objective was to evaluate how different flight parameters affect the detectability of spider monkeys in videos recorded by a drone equipped with a thermal infrared camera and examine the level of agreement between coders. We used generalized linear mixed models to evaluate the impact of flight speed (2, 4, 6 m/s), flight height (40, 50 m above ground level), and camera angle (−45°, −90°) on spider monkey counts in a closed-canopy forest in the Yucatan Peninsula, Mexico. Our results indicate that none of the three flight parameters affected the number of detected spider monkeys. Agreement between coders was "substantial" (Fleiss' kappa coefficient = 0.61–0.80) in most cases for high thermal-contrast zones. Our study contributes to the development of standardized flight protocols, which are essential to obtain accurate data on the presence and abundance of wild populations. Based on our results, we recommend performing drone surveys for spider monkeys and other medium-sized arboreal mammals with a small commercial drone at a 4 m/s speed, 15 m above canopy height, and with a −90° camera angle. However, these recommendations may vary depending on the size and noise level produced by the drone model. [ABSTRACT FROM AUTHOR]

Published
2024
Full Text
View/download PDF

18. Capacity for recovery in Bornean orangutan populations when limiting offtake and retaining forest

Author

Seaman, Dave J. I., primary, Voigt, Maria, additional, Ancrenaz, Marc, additional, Bocedi, Greta, additional, Meijaard, Erik, additional, Oram, Felicity, additional, Palmer, Stephen C. F., additional, Santika, Truly, additional, Sherman, Julie, additional, Travis, Justin M. J., additional, Wich, Serge, additional, Humle, Tatyana, additional, Supriatna, Jatna, additional, and Struebig, Matthew J., additional

Published
2024
Full Text
View/download PDF

19. A Severe Lack of Evidence Limits Effective Conservation of the World’s Primates

Author

JUNKER, JESSICA, PETROVAN, SILVIU O., ARROYO-RODRÍGUEZ, VICTOR, BOONRATANA, RAMESH, BYLER, DIRCK, CHAPMAN, COLIN A., CHETRY, DILIP, CHEYNE, SUSAN M., CORNEJO, FANNY M., CORTÉS-ORTIZ, LILIANA, COWLISHAW, GUY, CHRISTIE, ALEC P., CROCKFORD, CATHERINE, DE LA TORRE, STELLA, DE MELO, FABIANO R., FAN, P., GRUETER, CYRIL C., GUZMÁN-CARO, DIANA C., HEYMANN, ECKHARD W., HERBINGER, ILKA, HOANG, MINH D., HORWICH, ROBERT H., HUMLE, TATYANA, IKEMEH, RACHEL A., IMONG, INAOYOM S., JERUSALINSKY, LEANDRO, JOHNSON, STEIG E., KAPPELER, PETER M., KIERULFF, MARIA CECÍLIA M., KONÉ, INZA, KORMOS, REBECCA, LE, KHAC Q., LI, BAOGUO, MARSHALL, ANDREW J., MEIJAARD, ERIK, MITTERMEIER, RUSSEL A., MUROYAMA, YASUYUKI, NEUGEBAUER, ELEONORA, ORTH, LISA, PALACIOS, ERWIN, PAPWORTH, SARAH K., PLUMPTRE, ANDREW J., RAWSON, BEN M., REFISCH, JOHANNES, RATSIMBAZAFY, JONAH, ROOS, CHRISTIAN, SETCHELL, JOANNA M., SMITH, REBECCA K., SOP, TENE, SCHWITZER, CHRISTOPH, SLATER, KERRY, STRUM, SHIRLEY C., SUTHERLAND, WILLIAM J., TALEBI, MAURÍCIO, WALLIS, JANETTE, WICH, SERGE, WILLIAMSON, ELIZABETH A., WITTIG, ROMAN M., and KÜHL, HJALMAR S.

Published
2020

22. Consistent patterns of common species across tropical tree communities

Author

Cooper, Declan L M, Lewis, Simon L, Sullivan, Martin J P, Prado, Paulo I, Ter Steege, Hans, Barbier, Nicolas, Slik, Ferry, Sonké, Bonaventure, Ewango, Corneille E N, Adu-Bredu, Stephen, Affum-Baffoe, Kofi, de Aguiar, Daniel P P, Ahuite Reategui, Manuel Augusto, Aiba, Shin-Ichiro, Albuquerque, Bianca Weiss, de Almeida Matos, Francisca Dionízia, Alonso, Alfonso, Amani, Christian A, do Amaral, Dário Dantas, do Amaral, Iêda Leão, Andrade, Ana, de Andrade Miranda, Ires Paula, Angoboy, Ilondea B, Araujo-Murakami, Alejandro, Arboleda, Nicolás Castaño, Arroyo, Luzmila, Ashton, Peter, Aymard C, Gerardo A, Baider, Cláudia, Baker, Timothy R, Balinga, Michael Philippe Bessike, Balslev, Henrik, Banin, Lindsay F, Bánki, Olaf S, Baraloto, Chris, Barbosa, Edelcilio Marques, Barbosa, Flávia Rodrigues, Barlow, Jos, Bastin, Jean-Francois, Beeckman, Hans, Begne, Serge, Bengone, Natacha Nssi, Berenguer, Erika, Berry, Nicholas, Bitariho, Robert, Boeckx, Pascal, Bogaert, Jan, Bonyoma, Bernard, Boundja, Patrick, Bourland, Nils, Boyemba Bosela, Faustin, Brambach, Fabian, Brienen, Roel, Burslem, David F R P, Camargo, José Luís, Campelo, Wegliane, Cano, Angela, Cárdenas, Sasha, Cárdenas López, Dairon, de Sá Carpanedo, Rainiellen, Carrero Márquez, Yrma Andreina, Carvalho, Fernanda Antunes, Casas, Luisa Fernanda, Castellanos, Hernán, Castilho, Carolina V, Cerón, Carlos, Chapman, Colin A, Chave, Jerome, Chhang, Phourin, Chutipong, Wanlop, Chuyong, George B, Cintra, Bruno Barçante Ladvocat, Clark, Connie J, Coelho de Souza, Fernanda, Comiskey, James A, Coomes, David A, Cornejo Valverde, Fernando, Correa, Diego F, Costa, Flávia R C, Costa, Janaina Barbosa Pedrosa, Couteron, Pierre, Culmsee, Heike, Cuni-Sanchez, Aida, Dallmeier, Francisco, Damasco, Gabriel, Dauby, Gilles, Dávila, Nállarett, Dávila Doza, Hilda Paulette, De Alban, Jose Don T, de Assis, Rafael L, De Canniere, Charles, De Haulleville, Thales, de Jesus Veiga Carim, Marcelo, Demarchi, Layon O, Dexter, Kyle G, Di Fiore, Anthony, Din, Hazimah Haji Mohammad, Disney, Mathias I, Djiofack, Brice Yannick, Djuikouo, Marie-Noël K, Do, Tran Van, Doucet, Jean-Louis, Draper, Freddie C, Droissart, Vincent, Duivenvoorden, Joost F, Engel, Julien, Estienne, Vittoria, Farfan-Rios, William, Fauset, Sophie, Feeley, Kenneth J, Feitosa, Yuri Oliveira, Feldpausch, Ted R, Ferreira, Cid, Ferreira, Joice, Ferreira, Leandro Valle, Fletcher, Christine D, Flores, Bernardo Monteiro, Fofanah, Alusine, Foli, Ernest G, Fonty, Émile, Fredriksson, Gabriella M, Fuentes, Alfredo, Galbraith, David, Gallardo Gonzales, George Pepe, Garcia-Cabrera, Karina, García-Villacorta, Roosevelt, Gomes, Vitor H F, Gómez, Ricardo Zárate, Gonzales, Therany, Gribel, Rogerio, Guedes, Marcelino Carneiro, Guevara, Juan Ernesto, Hakeem, Khalid Rehman, Hall, Jefferson S, Hamer, Keith C, Hamilton, Alan C, Harris, David J, Harrison, Rhett D, Hart, Terese B, Hector, Andy, Henkel, Terry W, Herbohn, John, Hockemba, Mireille B N, Hoffman, Bruce, Holmgren, Milena, Honorio Coronado, Euridice N, Huamantupa-Chuquimaco, Isau, Hubau, Wannes, Imai, Nobuo, Irume, Mariana Victória, Jansen, Patrick A, Jeffery, Kathryn J, Jimenez, Eliana M, Jucker, Tommaso, Junqueira, André Braga, Kalamandeen, Michelle, Kamdem, Narcisse G, Kartawinata, Kuswata, Kasongo Yakusu, Emmanuel, Katembo, John M, Kearsley, Elizabeth, Kenfack, David, Kessler, Michael, Khaing, Thiri Toe, Killeen, Timothy J, Kitayama, Kanehiro, Klitgaard, Bente, Labrière, Nicolas, Laumonier, Yves, Laurance, Susan G W, Laurance, William F, Laurent, Félix, Le, Tinh Cong, Le, Trai Trong, Leal, Miguel E, Leão de Moraes Novo, Evlyn Márcia, Levesley, Aurora, Libalah, Moses B, Licona, Juan Carlos, Lima Filho, Diógenes de Andrade, Lindsell, Jeremy A, Lopes, Aline, Lopes, Maria Aparecida, Lovett, Jon C, Lowe, Richard, Lozada, José Rafael, Lu, Xinghui, Luambua, Nestor K, Luize, Bruno Garcia, Maas, Paul, Magalhães, José Leonardo Lima, Magnusson, William E, Mahayani, Ni Putu Diana, Makana, Jean-Remy, Malhi, Yadvinder, Maniguaje Rincón, Lorena, Mansor, Asyraf, Manzatto, Angelo Gilberto, Marimon, Beatriz S, Marimon-Junior, Ben Hur, Marshall, Andrew R, Martins, Maria Pires, Mbayu, Faustin M, de Medeiros, Marcelo Brilhante, Mesones, Italo, Metali, Faizah, Mihindou, Vianet, Millet, Jerome, Milliken, William, Mogollón, Hugo F, Molino, Jean-François, Mohd Said, Mohd Nizam, Monteagudo Mendoza, Abel, Montero, Juan Carlos, Moore, Sam, Mostacedo, Bonifacio, Mozombite Pinto, Linder Felipe, Mukul, Sharif Ahmed, Munishi, Pantaleo K T, Nagamasu, Hidetoshi, Nascimento, Henrique Eduardo Mendonça, Nascimento, Marcelo Trindade, Neill, David, Nilus, Reuben, Noronha, Janaína Costa, Nsenga, Laurent, Núñez Vargas, Percy, Ojo, Lucas, Oliveira, Alexandre A, de Oliveira, Edmar Almeida, Ondo, Fidèle Evouna, Palacios Cuenca, Walter, Pansini, Susamar, Pansonato, Marcelo Petratti, Paredes, Marcos Ríos, Paudel, Ekananda, Pauletto, Daniela, Pearson, Richard G, Pena, José Luis Marcelo, Pennington, R Toby, Peres, Carlos A, Permana, Andrea, Petronelli, Pascal, Peñuela Mora, Maria Cristina, Phillips, Juan Fernando, Phillips, Oliver L, Pickavance, Georgia, Piedade, Maria Teresa Fernandez, Pitman, Nigel C A, Ploton, Pierre, Popelier, Andreas, Poulsen, John R, Prieto, Adriana, Primack, Richard B, Priyadi, Hari, Qie, Lan, Quaresma, Adriano Costa, de Queiroz, Helder Lima, Ramirez-Angulo, Hirma, Ramos, José Ferreira, Reis, Neidiane Farias Costa, Reitsma, Jan, Revilla, Juan David Cardenas, Riutta, Terhi, Rivas-Torres, Gonzalo, Robiansyah, Iyan, Rocha, Maira, Rodrigues, Domingos de Jesus, Rodriguez-Ronderos, M Elizabeth, Rovero, Francesco, Rozak, Andes H, Rudas, Agustín, Rutishauser, Ervan, Sabatier, Daniel, Sagang, Le Bienfaiteur, Sampaio, Adeilza Felipe, Samsoedin, Ismayadi, Satdichanh, Manichanh, Schietti, Juliana, Schöngart, Jochen, Scudeller, Veridiana Vizoni, Seuaturien, Naret, Sheil, Douglas, Sierra, Rodrigo, Silman, Miles R, Silva, Thiago Sanna Freire, da Silva Guimarães, José Renan, Simo-Droissart, Murielle, Simon, Marcelo Fragomeni, Sist, Plinio, Sousa, Thaiane R, de Sousa Farias, Emanuelle, de Souza Coelho, Luiz, Spracklen, Dominick V, Stas, Suzanne M, Steinmetz, Robert, Stevenson, Pablo R, Stropp, Juliana, Sukri, Rahayu S, Sunderland, Terry C H, Suzuki, Eizi, Swaine, Michael D, Tang, Jianwei, Taplin, James, Taylor, David M, Tello, J Sebastián, Terborgh, John, Texier, Nicolas, Theilade, Ida, Thomas, Duncan W, Thomas, Raquel, Thomas, Sean C, Tirado, Milton, Toirambe, Benjamin, de Toledo, José Julio, Tomlinson, Kyle W, Torres-Lezama, Armando, Tran, Hieu Dang, Tshibamba Mukendi, John, Tumaneng, Roven D, Umaña, Maria Natalia, Umunay, Peter M, Urrego Giraldo, Ligia Estela, Valderrama Sandoval, Elvis H, Valenzuela Gamarra, Luis, Van Andel, Tinde R, van de Bult, Martin, van de Pol, Jaqueline, van der Heijden, Geertje, Vasquez, Rodolfo, Vela, César I A, Venticinque, Eduardo Martins, Verbeeck, Hans, Veridiano, Rizza Karen A, Vicentini, Alberto, Vieira, Ima Célia Guimarães, Vilanova Torre, Emilio, Villarroel, Daniel, Villa Zegarra, Boris Eduardo, Vleminckx, Jason, von Hildebrand, Patricio, Vos, Vincent Antoine, Vriesendorp, Corine, Webb, Edward L, White, Lee J T, Wich, Serge, Wittmann, Florian, Zagt, Roderick, Zang, Runguo, Zartman, Charles Eugene, Zemagho, Lise, Zent, Egleé L, Zent, Stanford, Cooper, Declan L M, Lewis, Simon L, Sullivan, Martin J P, Prado, Paulo I, Ter Steege, Hans, Barbier, Nicolas, Slik, Ferry, Sonké, Bonaventure, Ewango, Corneille E N, Adu-Bredu, Stephen, Affum-Baffoe, Kofi, de Aguiar, Daniel P P, Ahuite Reategui, Manuel Augusto, Aiba, Shin-Ichiro, Albuquerque, Bianca Weiss, de Almeida Matos, Francisca Dionízia, Alonso, Alfonso, Amani, Christian A, do Amaral, Dário Dantas, do Amaral, Iêda Leão, Andrade, Ana, de Andrade Miranda, Ires Paula, Angoboy, Ilondea B, Araujo-Murakami, Alejandro, Arboleda, Nicolás Castaño, Arroyo, Luzmila, Ashton, Peter, Aymard C, Gerardo A, Baider, Cláudia, Baker, Timothy R, Balinga, Michael Philippe Bessike, Balslev, Henrik, Banin, Lindsay F, Bánki, Olaf S, Baraloto, Chris, Barbosa, Edelcilio Marques, Barbosa, Flávia Rodrigues, Barlow, Jos, Bastin, Jean-Francois, Beeckman, Hans, Begne, Serge, Bengone, Natacha Nssi, Berenguer, Erika, Berry, Nicholas, Bitariho, Robert, Boeckx, Pascal, Bogaert, Jan, Bonyoma, Bernard, Boundja, Patrick, Bourland, Nils, Boyemba Bosela, Faustin, Brambach, Fabian, Brienen, Roel, Burslem, David F R P, Camargo, José Luís, Campelo, Wegliane, Cano, Angela, Cárdenas, Sasha, Cárdenas López, Dairon, de Sá Carpanedo, Rainiellen, Carrero Márquez, Yrma Andreina, Carvalho, Fernanda Antunes, Casas, Luisa Fernanda, Castellanos, Hernán, Castilho, Carolina V, Cerón, Carlos, Chapman, Colin A, Chave, Jerome, Chhang, Phourin, Chutipong, Wanlop, Chuyong, George B, Cintra, Bruno Barçante Ladvocat, Clark, Connie J, Coelho de Souza, Fernanda, Comiskey, James A, Coomes, David A, Cornejo Valverde, Fernando, Correa, Diego F, Costa, Flávia R C, Costa, Janaina Barbosa Pedrosa, Couteron, Pierre, Culmsee, Heike, Cuni-Sanchez, Aida, Dallmeier, Francisco, Damasco, Gabriel, Dauby, Gilles, Dávila, Nállarett, Dávila Doza, Hilda Paulette, De Alban, Jose Don T, de Assis, Rafael L, De Canniere, Charles, De Haulleville, Thales, de Jesus Veiga Carim, Marcelo, Demarchi, Layon O, Dexter, Kyle G, Di Fiore, Anthony, Din, Hazimah Haji Mohammad, Disney, Mathias I, Djiofack, Brice Yannick, Djuikouo, Marie-Noël K, Do, Tran Van, Doucet, Jean-Louis, Draper, Freddie C, Droissart, Vincent, Duivenvoorden, Joost F, Engel, Julien, Estienne, Vittoria, Farfan-Rios, William, Fauset, Sophie, Feeley, Kenneth J, Feitosa, Yuri Oliveira, Feldpausch, Ted R, Ferreira, Cid, Ferreira, Joice, Ferreira, Leandro Valle, Fletcher, Christine D, Flores, Bernardo Monteiro, Fofanah, Alusine, Foli, Ernest G, Fonty, Émile, Fredriksson, Gabriella M, Fuentes, Alfredo, Galbraith, David, Gallardo Gonzales, George Pepe, Garcia-Cabrera, Karina, García-Villacorta, Roosevelt, Gomes, Vitor H F, Gómez, Ricardo Zárate, Gonzales, Therany, Gribel, Rogerio, Guedes, Marcelino Carneiro, Guevara, Juan Ernesto, Hakeem, Khalid Rehman, Hall, Jefferson S, Hamer, Keith C, Hamilton, Alan C, Harris, David J, Harrison, Rhett D, Hart, Terese B, Hector, Andy, Henkel, Terry W, Herbohn, John, Hockemba, Mireille B N, Hoffman, Bruce, Holmgren, Milena, Honorio Coronado, Euridice N, Huamantupa-Chuquimaco, Isau, Hubau, Wannes, Imai, Nobuo, Irume, Mariana Victória, Jansen, Patrick A, Jeffery, Kathryn J, Jimenez, Eliana M, Jucker, Tommaso, Junqueira, André Braga, Kalamandeen, Michelle, Kamdem, Narcisse G, Kartawinata, Kuswata, Kasongo Yakusu, Emmanuel, Katembo, John M, Kearsley, Elizabeth, Kenfack, David, Kessler, Michael, Khaing, Thiri Toe, Killeen, Timothy J, Kitayama, Kanehiro, Klitgaard, Bente, Labrière, Nicolas, Laumonier, Yves, Laurance, Susan G W, Laurance, William F, Laurent, Félix, Le, Tinh Cong, Le, Trai Trong, Leal, Miguel E, Leão de Moraes Novo, Evlyn Márcia, Levesley, Aurora, Libalah, Moses B, Licona, Juan Carlos, Lima Filho, Diógenes de Andrade, Lindsell, Jeremy A, Lopes, Aline, Lopes, Maria Aparecida, Lovett, Jon C, Lowe, Richard, Lozada, José Rafael, Lu, Xinghui, Luambua, Nestor K, Luize, Bruno Garcia, Maas, Paul, Magalhães, José Leonardo Lima, Magnusson, William E, Mahayani, Ni Putu Diana, Makana, Jean-Remy, Malhi, Yadvinder, Maniguaje Rincón, Lorena, Mansor, Asyraf, Manzatto, Angelo Gilberto, Marimon, Beatriz S, Marimon-Junior, Ben Hur, Marshall, Andrew R, Martins, Maria Pires, Mbayu, Faustin M, de Medeiros, Marcelo Brilhante, Mesones, Italo, Metali, Faizah, Mihindou, Vianet, Millet, Jerome, Milliken, William, Mogollón, Hugo F, Molino, Jean-François, Mohd Said, Mohd Nizam, Monteagudo Mendoza, Abel, Montero, Juan Carlos, Moore, Sam, Mostacedo, Bonifacio, Mozombite Pinto, Linder Felipe, Mukul, Sharif Ahmed, Munishi, Pantaleo K T, Nagamasu, Hidetoshi, Nascimento, Henrique Eduardo Mendonça, Nascimento, Marcelo Trindade, Neill, David, Nilus, Reuben, Noronha, Janaína Costa, Nsenga, Laurent, Núñez Vargas, Percy, Ojo, Lucas, Oliveira, Alexandre A, de Oliveira, Edmar Almeida, Ondo, Fidèle Evouna, Palacios Cuenca, Walter, Pansini, Susamar, Pansonato, Marcelo Petratti, Paredes, Marcos Ríos, Paudel, Ekananda, Pauletto, Daniela, Pearson, Richard G, Pena, José Luis Marcelo, Pennington, R Toby, Peres, Carlos A, Permana, Andrea, Petronelli, Pascal, Peñuela Mora, Maria Cristina, Phillips, Juan Fernando, Phillips, Oliver L, Pickavance, Georgia, Piedade, Maria Teresa Fernandez, Pitman, Nigel C A, Ploton, Pierre, Popelier, Andreas, Poulsen, John R, Prieto, Adriana, Primack, Richard B, Priyadi, Hari, Qie, Lan, Quaresma, Adriano Costa, de Queiroz, Helder Lima, Ramirez-Angulo, Hirma, Ramos, José Ferreira, Reis, Neidiane Farias Costa, Reitsma, Jan, Revilla, Juan David Cardenas, Riutta, Terhi, Rivas-Torres, Gonzalo, Robiansyah, Iyan, Rocha, Maira, Rodrigues, Domingos de Jesus, Rodriguez-Ronderos, M Elizabeth, Rovero, Francesco, Rozak, Andes H, Rudas, Agustín, Rutishauser, Ervan, Sabatier, Daniel, Sagang, Le Bienfaiteur, Sampaio, Adeilza Felipe, Samsoedin, Ismayadi, Satdichanh, Manichanh, Schietti, Juliana, Schöngart, Jochen, Scudeller, Veridiana Vizoni, Seuaturien, Naret, Sheil, Douglas, Sierra, Rodrigo, Silman, Miles R, Silva, Thiago Sanna Freire, da Silva Guimarães, José Renan, Simo-Droissart, Murielle, Simon, Marcelo Fragomeni, Sist, Plinio, Sousa, Thaiane R, de Sousa Farias, Emanuelle, de Souza Coelho, Luiz, Spracklen, Dominick V, Stas, Suzanne M, Steinmetz, Robert, Stevenson, Pablo R, Stropp, Juliana, Sukri, Rahayu S, Sunderland, Terry C H, Suzuki, Eizi, Swaine, Michael D, Tang, Jianwei, Taplin, James, Taylor, David M, Tello, J Sebastián, Terborgh, John, Texier, Nicolas, Theilade, Ida, Thomas, Duncan W, Thomas, Raquel, Thomas, Sean C, Tirado, Milton, Toirambe, Benjamin, de Toledo, José Julio, Tomlinson, Kyle W, Torres-Lezama, Armando, Tran, Hieu Dang, Tshibamba Mukendi, John, Tumaneng, Roven D, Umaña, Maria Natalia, Umunay, Peter M, Urrego Giraldo, Ligia Estela, Valderrama Sandoval, Elvis H, Valenzuela Gamarra, Luis, Van Andel, Tinde R, van de Bult, Martin, van de Pol, Jaqueline, van der Heijden, Geertje, Vasquez, Rodolfo, Vela, César I A, Venticinque, Eduardo Martins, Verbeeck, Hans, Veridiano, Rizza Karen A, Vicentini, Alberto, Vieira, Ima Célia Guimarães, Vilanova Torre, Emilio, Villarroel, Daniel, Villa Zegarra, Boris Eduardo, Vleminckx, Jason, von Hildebrand, Patricio, Vos, Vincent Antoine, Vriesendorp, Corine, Webb, Edward L, White, Lee J T, Wich, Serge, Wittmann, Florian, Zagt, Roderick, Zang, Runguo, Zartman, Charles Eugene, Zemagho, Lise, Zent, Egleé L, and Zent, Stanford

Abstract

Trees structure the Earth’s most biodiverse ecosystem, tropical forests. The vast number of tree species presents a formidable challenge to understanding these forests, including their response to environmental change, as very little is known about most tropical tree species. A focus on the common species may circumvent this challenge. Here we investigate abundance patterns of common tree species using inventory data on 1,003,805 trees with trunk diameters of at least 10 cm across 1,568 locations1–6 in closed-canopy, structurally intact old-growth tropical forests in Africa, Amazonia and Southeast Asia. We estimate that 2.2%, 2.2% and 2.3% of species comprise 50% of the tropical trees in these regions, respectively. Extrapolating across all closed-canopy tropical forests, we estimate that just 1,053 species comprise half of Earth’s 800 billion tropical trees with trunk diameters of at least 10 cm. Despite differing biogeographic, climatic and anthropogenic histories7, we find notably consistent patterns of common species and species abundance distributions across the continents. This suggests that fundamental mechanisms of tree community assembly may apply to all tropical forests. Resampling analyses show that the most common species are likely to belong to a manageable list of known species, enabling targeted efforts to understand their ecology. Although they do not detract from the importance of rare species, our results open new opportunities to understand the world’s most diverse forests, including modelling their response to environmental change, by focusing on the common species that constitute the majority of their trees.

Published
2024

23. Consistent patterns of common species across tropical tree communities

Author

Cooper, Declan L.M., Lewis, Simon L., Sullivan, Martin J.P., Prado, Paulo I., ter Steege, Hans, Barbier, Nicolas, Slik, Ferry, Sonké, Bonaventure, Ewango, Corneille E.N., Adu-Bredu, Stephen, Affum-Baffoe, Kofi, de Aguiar, Daniel P.P., Ahuite Reategui, Manuel Augusto, Aiba, Shin-Ichiro, Albuquerque, Bianca Weiss, de Almeida Matos, Francisca Dionízia, Alonso, Alfonso, Amani, Christian A., do Amaral, Dário Dantas, do Amaral, Iêda Leão, Andrade, Ana, de Andrade Miranda, Ires Paula, Angoboy, Ilondea B., Araujo-Murakami, Alejandro, Arboleda, Nicolás Castaño, Arroyo, Luzmila, Ashton, Peter, Aymard C, Gerardo A., Baider, Cláudia, Baker, Timothy R., Balinga, Michael Philippe Bessike, Balslev, Henrik, Banin, Lindsay F., Bánki, Olaf S., Baraloto, Chris, Barbosa, Edelcilio Marques, Barbosa, Flávia Rodrigues, Barlow, Jos, Bastin, Jean-Francois, Beeckman, Hans, Begne, Serge, Bengone, Natacha Nssi, Berenguer, Erika, Berry, Nicholas, Bitariho, Robert, Boeckx, Pascal, Bogaert, Jan, Bonyoma, Bernard, Boundja, Patrick, Bourland, Nils, Boyemba Bosela, Faustin, Brambach, Fabian, Brienen, Roel, Burslem, David F.R.P., Camargo, José Luís, Campelo, Wegliane, Cano, Angela, Cárdenas, Sasha, Cárdenas López, Dairon, de Sá Carpanedo, Rainiellen, Carrero Márquez, Yrma Andreina, Carvalho, Fernanda Antunes, Casas, Luisa Fernanda, Castellanos, Hernán, Castilho, Carolina V., Cerón, Carlos, Chapman, Colin A., Chave, Jerome, Chhang, Phourin, Chutipong, Wanlop, Chuyong, George B., Cintra, Bruno Barçante Ladvocat, Clark, Connie J., Coelho de Souza, Fernanda, Comiskey, James A., Coomes, David A., Cornejo Valverde, Fernando, Correa, Diego F., Costa, Flávia R.C., Costa, Janaina Barbosa Pedrosa, Couteron, Pierre, Culmsee, Heike, Cuni-Sanchez, Aida, Dallmeier, Francisco, Damasco, Gabriel, Dauby, Gilles, Dávila, Nállarett, Dávila Doza, Hilda Paulette, De Alban, Jose Don T., de Assis, Rafael L., De Canniere, Charles, De Haulleville, Thales, de Jesus Veiga Carim, Marcelo, Demarchi, Layon O., Dexter, Kyle G., Di Fiore, Anthony, Din, Hazimah Haji Mohammad, Disney, Mathias I., Djiofack, Brice Yannick, Djuikouo, Marie-Noël K., Do, Tran Van, Doucet, Jean-Louis, Draper, Freddie C., Droissart, Vincent, Duivenvoorden, Joost F., Engel, Julien, Estienne, Vittoria, Farfan-Rios, William, Fauset, Sophie, Feeley, Kenneth J., Feitosa, Yuri Oliveira, Feldpausch, Ted R., Ferreira, Cid, Ferreira, Joice, Ferreira, Leandro Valle, Fletcher, Christine D., Flores, Bernardo Monteiro, Fofanah, Alusine, Foli, Ernest G., Fonty, Émile, Fredriksson, Gabriella M., Fuentes, Alfredo, Galbraith, David, Gallardo Gonzales, George Pepe, Garcia-Cabrera, Karina, García-Villacorta, Roosevelt, Gomes, Vitor H.F., Gómez, Ricardo Zárate, Gonzales, Therany, Gribel, Rogerio, Guedes, Marcelino Carneiro, Guevara, Juan Ernesto, Hakeem, Khalid Rehman, Hall, Jefferson S., Hamer, Keith C., Hamilton, Alan C., Harris, David J., Harrison, Rhett D., Hart, Terese B., Hector, Andy, Henkel, Terry W., Herbohn, John, Hockemba, Mireille B.N., Hoffman, Bruce, Holmgren, Milena, Honorio Coronado, Euridice N., Huamantupa-Chuquimaco, Isau, Hubau, Wannes, Imai, Nobuo, Irume, Mariana Victória, Jansen, Patrick A., Jeffery, Kathryn J., Jimenez, Eliana M., Jucker, Tommaso, Junqueira, André Braga, Kalamandeen, Michelle, Kamdem, Narcisse G., Kartawinata, Kuswata, Kasongo Yakusu, Emmanuel, Katembo, John M., Kearsley, Elizabeth, Kenfack, David, Kessler, Michael, Khaing, Thiri Toe, Killeen, Timothy J., Kitayama, Kanehiro, Klitgaard, Bente, Labrière, Nicolas, Laumonier, Yves, Laurance, Susan G.W., Laurance, William F., Laurent, Félix, Le, Tinh Cong, Le, Trai Trong, Leal, Miguel E., Leão de Moraes Novo, Evlyn Márcia, Levesley, Aurora, Libalah, Moses B., Licona, Juan Carlos, Lima Filho, Diógenes de Andrade, Lindsell, Jeremy A., Lopes, Aline, Lopes, Maria Aparecida, Lovett, Jon C., Lowe, Richard, Lozada, José Rafael, Lu, Xinghui, Luambua, Nestor K., Luize, Bruno Garcia, Maas, Paul, Magalhães, José Leonardo Lima, Magnusson, William E., Mahayani, Ni Putu Diana, Makana, Jean-Remy, Malhi, Yadvinder, Maniguaje Rincón, Lorena, Mansor, Asyraf, Manzatto, Angelo Gilberto, Marimon, Beatriz S., Marimon-Junior, Ben Hur, Marshall, Andrew R., Martins, Maria Pires, Mbayu, Faustin M., de Medeiros, Marcelo Brilhante, Mesones, Italo, Metali, Faizah, Mihindou, Vianet, Millet, Jerome, Milliken, William, Mogollón, Hugo F., Molino, Jean-François, Mohd. Said, Mohd. Nizam, Monteagudo Mendoza, Abel, Montero, Juan Carlos, Moore, Sam, Mostacedo, Bonifacio, Mozombite Pinto, Linder Felipe, Mukul, Sharif Ahmed, Munishi, Pantaleo K.T., Nagamasu, Hidetoshi, Nascimento, Henrique Eduardo Mendonça, Nascimento, Marcelo Trindade, Neill, David, Nilus, Reuben, Noronha, Janaína Costa, Nsenga, Laurent, Núñez Vargas, Percy, Ojo, Lucas, Oliveira, Alexandre A., de Oliveira, Edmar Almeida, Ondo, Fidèle Evouna, Palacios Cuenca, Walter, Pansini, Susamar, Pansonato, Marcelo Petratti, Paredes, Marcos Ríos, Paudel, Ekananda, Pauletto, Daniela, Pearson, Richard G., Pena, José Luis Marcelo, Pennington, R. Toby, Peres, Carlos A., Permana, Andrea, Petronelli, Pascal, Peñuela Mora, Maria Cristina, Phillips, Juan Fernando, Phillips, Oliver L., Pickavance, Georgia, Piedade, Maria Teresa Fernandez, Pitman, Nigel C.A., Ploton, Pierre, Popelier, Andreas, Poulsen, John R., Prieto, Adriana, Primack, Richard B., Priyadi, Hari, Qie, Lan, Quaresma, Adriano Costa, de Queiroz, Helder Lima, Ramirez-Angulo, Hirma, Ramos, José Ferreira, Reis, Neidiane Farias Costa, Reitsma, Jan, Revilla, Juan David Cardenas, Riutta, Terhi, Rivas-Torres, Gonzalo, Robiansyah, Iyan, Rocha, Maira, Rodrigues, Domingos de Jesus, Rodriguez-Ronderos, M. Elizabeth, Rovero, Francesco, Rozak, Andes H., Rudas, Agustín, Rutishauser, Ervan, Sabatier, Daniel, Sagang, Le Bienfaiteur, Sampaio, Adeilza Felipe, Samsoedin, Ismayadi, Satdichanh, Manichanh, Schietti, Juliana, Schöngart, Jochen, Scudeller, Veridiana Vizoni, Seuaturien, Naret, Sheil, Douglas, Sierra, Rodrigo, Silman, Miles R., Silva, Thiago Sanna Freire, da Silva Guimarães, José Renan, Simo-Droissart, Murielle, Simon, Marcelo Fragomeni, Sist, Plinio, Sousa, Thaiane R., de Sousa Farias, Emanuelle, de Souza Coelho, Luiz, Spracklen, Dominick V., Stas, Suzanne M., Steinmetz, Robert, Stevenson, Pablo R., Stropp, Juliana, Sukri, Rahayu S., Sunderland, Terry C.H., Suzuki, Eizi, Swaine, Michael D., Tang, Jianwei, Taplin, James, Taylor, David M., Tello, J. Sebastián, Terborgh, John, Texier, Nicolas, Theilade, Ida, Thomas, Duncan W., Thomas, Raquel, Thomas, Sean C., Tirado, Milton, Toirambe, Benjamin, de Toledo, José Julio, Tomlinson, Kyle W., Torres-Lezama, Armando, Tran, Hieu Dang, Tshibamba Mukendi, John, Tumaneng, Roven D., Umaña, Maria Natalia, Umunay, Peter M., Urrego Giraldo, Ligia Estela, Valderrama Sandoval, Elvis H., Valenzuela Gamarra, Luis, Van Andel, Tinde R., van de Bult, Martin, van de Pol, Jaqueline, van der Heijden, Geertje, Vasquez, Rodolfo, Vela, César I.A., Venticinque, Eduardo Martins, Verbeeck, Hans, Veridiano, Rizza Karen A., Vicentini, Alberto, Vieira, Ima Célia Guimarães, Vilanova Torre, Emilio, Villarroel, Daniel, Villa Zegarra, Boris Eduardo, Vleminckx, Jason, von Hildebrand, Patricio, Vos, Vincent Antoine, Vriesendorp, Corine, Webb, Edward L., White, Lee J.T., Wich, Serge, Wittmann, Florian, Zagt, Roderick, Zang, Runguo, Zartman, Charles Eugene, Zemagho, Lise, Zent, Egleé L., Zent, Stanford, Cooper, Declan L.M., Lewis, Simon L., Sullivan, Martin J.P., Prado, Paulo I., ter Steege, Hans, Barbier, Nicolas, Slik, Ferry, Sonké, Bonaventure, Ewango, Corneille E.N., Adu-Bredu, Stephen, Affum-Baffoe, Kofi, de Aguiar, Daniel P.P., Ahuite Reategui, Manuel Augusto, Aiba, Shin-Ichiro, Albuquerque, Bianca Weiss, de Almeida Matos, Francisca Dionízia, Alonso, Alfonso, Amani, Christian A., do Amaral, Dário Dantas, do Amaral, Iêda Leão, Andrade, Ana, de Andrade Miranda, Ires Paula, Angoboy, Ilondea B., Araujo-Murakami, Alejandro, Arboleda, Nicolás Castaño, Arroyo, Luzmila, Ashton, Peter, Aymard C, Gerardo A., Baider, Cláudia, Baker, Timothy R., Balinga, Michael Philippe Bessike, Balslev, Henrik, Banin, Lindsay F., Bánki, Olaf S., Baraloto, Chris, Barbosa, Edelcilio Marques, Barbosa, Flávia Rodrigues, Barlow, Jos, Bastin, Jean-Francois, Beeckman, Hans, Begne, Serge, Bengone, Natacha Nssi, Berenguer, Erika, Berry, Nicholas, Bitariho, Robert, Boeckx, Pascal, Bogaert, Jan, Bonyoma, Bernard, Boundja, Patrick, Bourland, Nils, Boyemba Bosela, Faustin, Brambach, Fabian, Brienen, Roel, Burslem, David F.R.P., Camargo, José Luís, Campelo, Wegliane, Cano, Angela, Cárdenas, Sasha, Cárdenas López, Dairon, de Sá Carpanedo, Rainiellen, Carrero Márquez, Yrma Andreina, Carvalho, Fernanda Antunes, Casas, Luisa Fernanda, Castellanos, Hernán, Castilho, Carolina V., Cerón, Carlos, Chapman, Colin A., Chave, Jerome, Chhang, Phourin, Chutipong, Wanlop, Chuyong, George B., Cintra, Bruno Barçante Ladvocat, Clark, Connie J., Coelho de Souza, Fernanda, Comiskey, James A., Coomes, David A., Cornejo Valverde, Fernando, Correa, Diego F., Costa, Flávia R.C., Costa, Janaina Barbosa Pedrosa, Couteron, Pierre, Culmsee, Heike, Cuni-Sanchez, Aida, Dallmeier, Francisco, Damasco, Gabriel, Dauby, Gilles, Dávila, Nállarett, Dávila Doza, Hilda Paulette, De Alban, Jose Don T., de Assis, Rafael L., De Canniere, Charles, De Haulleville, Thales, de Jesus Veiga Carim, Marcelo, Demarchi, Layon O., Dexter, Kyle G., Di Fiore, Anthony, Din, Hazimah Haji Mohammad, Disney, Mathias I., Djiofack, Brice Yannick, Djuikouo, Marie-Noël K., Do, Tran Van, Doucet, Jean-Louis, Draper, Freddie C., Droissart, Vincent, Duivenvoorden, Joost F., Engel, Julien, Estienne, Vittoria, Farfan-Rios, William, Fauset, Sophie, Feeley, Kenneth J., Feitosa, Yuri Oliveira, Feldpausch, Ted R., Ferreira, Cid, Ferreira, Joice, Ferreira, Leandro Valle, Fletcher, Christine D., Flores, Bernardo Monteiro, Fofanah, Alusine, Foli, Ernest G., Fonty, Émile, Fredriksson, Gabriella M., Fuentes, Alfredo, Galbraith, David, Gallardo Gonzales, George Pepe, Garcia-Cabrera, Karina, García-Villacorta, Roosevelt, Gomes, Vitor H.F., Gómez, Ricardo Zárate, Gonzales, Therany, Gribel, Rogerio, Guedes, Marcelino Carneiro, Guevara, Juan Ernesto, Hakeem, Khalid Rehman, Hall, Jefferson S., Hamer, Keith C., Hamilton, Alan C., Harris, David J., Harrison, Rhett D., Hart, Terese B., Hector, Andy, Henkel, Terry W., Herbohn, John, Hockemba, Mireille B.N., Hoffman, Bruce, Holmgren, Milena, Honorio Coronado, Euridice N., Huamantupa-Chuquimaco, Isau, Hubau, Wannes, Imai, Nobuo, Irume, Mariana Victória, Jansen, Patrick A., Jeffery, Kathryn J., Jimenez, Eliana M., Jucker, Tommaso, Junqueira, André Braga, Kalamandeen, Michelle, Kamdem, Narcisse G., Kartawinata, Kuswata, Kasongo Yakusu, Emmanuel, Katembo, John M., Kearsley, Elizabeth, Kenfack, David, Kessler, Michael, Khaing, Thiri Toe, Killeen, Timothy J., Kitayama, Kanehiro, Klitgaard, Bente, Labrière, Nicolas, Laumonier, Yves, Laurance, Susan G.W., Laurance, William F., Laurent, Félix, Le, Tinh Cong, Le, Trai Trong, Leal, Miguel E., Leão de Moraes Novo, Evlyn Márcia, Levesley, Aurora, Libalah, Moses B., Licona, Juan Carlos, Lima Filho, Diógenes de Andrade, Lindsell, Jeremy A., Lopes, Aline, Lopes, Maria Aparecida, Lovett, Jon C., Lowe, Richard, Lozada, José Rafael, Lu, Xinghui, Luambua, Nestor K., Luize, Bruno Garcia, Maas, Paul, Magalhães, José Leonardo Lima, Magnusson, William E., Mahayani, Ni Putu Diana, Makana, Jean-Remy, Malhi, Yadvinder, Maniguaje Rincón, Lorena, Mansor, Asyraf, Manzatto, Angelo Gilberto, Marimon, Beatriz S., Marimon-Junior, Ben Hur, Marshall, Andrew R., Martins, Maria Pires, Mbayu, Faustin M., de Medeiros, Marcelo Brilhante, Mesones, Italo, Metali, Faizah, Mihindou, Vianet, Millet, Jerome, Milliken, William, Mogollón, Hugo F., Molino, Jean-François, Mohd. Said, Mohd. Nizam, Monteagudo Mendoza, Abel, Montero, Juan Carlos, Moore, Sam, Mostacedo, Bonifacio, Mozombite Pinto, Linder Felipe, Mukul, Sharif Ahmed, Munishi, Pantaleo K.T., Nagamasu, Hidetoshi, Nascimento, Henrique Eduardo Mendonça, Nascimento, Marcelo Trindade, Neill, David, Nilus, Reuben, Noronha, Janaína Costa, Nsenga, Laurent, Núñez Vargas, Percy, Ojo, Lucas, Oliveira, Alexandre A., de Oliveira, Edmar Almeida, Ondo, Fidèle Evouna, Palacios Cuenca, Walter, Pansini, Susamar, Pansonato, Marcelo Petratti, Paredes, Marcos Ríos, Paudel, Ekananda, Pauletto, Daniela, Pearson, Richard G., Pena, José Luis Marcelo, Pennington, R. Toby, Peres, Carlos A., Permana, Andrea, Petronelli, Pascal, Peñuela Mora, Maria Cristina, Phillips, Juan Fernando, Phillips, Oliver L., Pickavance, Georgia, Piedade, Maria Teresa Fernandez, Pitman, Nigel C.A., Ploton, Pierre, Popelier, Andreas, Poulsen, John R., Prieto, Adriana, Primack, Richard B., Priyadi, Hari, Qie, Lan, Quaresma, Adriano Costa, de Queiroz, Helder Lima, Ramirez-Angulo, Hirma, Ramos, José Ferreira, Reis, Neidiane Farias Costa, Reitsma, Jan, Revilla, Juan David Cardenas, Riutta, Terhi, Rivas-Torres, Gonzalo, Robiansyah, Iyan, Rocha, Maira, Rodrigues, Domingos de Jesus, Rodriguez-Ronderos, M. Elizabeth, Rovero, Francesco, Rozak, Andes H., Rudas, Agustín, Rutishauser, Ervan, Sabatier, Daniel, Sagang, Le Bienfaiteur, Sampaio, Adeilza Felipe, Samsoedin, Ismayadi, Satdichanh, Manichanh, Schietti, Juliana, Schöngart, Jochen, Scudeller, Veridiana Vizoni, Seuaturien, Naret, Sheil, Douglas, Sierra, Rodrigo, Silman, Miles R., Silva, Thiago Sanna Freire, da Silva Guimarães, José Renan, Simo-Droissart, Murielle, Simon, Marcelo Fragomeni, Sist, Plinio, Sousa, Thaiane R., de Sousa Farias, Emanuelle, de Souza Coelho, Luiz, Spracklen, Dominick V., Stas, Suzanne M., Steinmetz, Robert, Stevenson, Pablo R., Stropp, Juliana, Sukri, Rahayu S., Sunderland, Terry C.H., Suzuki, Eizi, Swaine, Michael D., Tang, Jianwei, Taplin, James, Taylor, David M., Tello, J. Sebastián, Terborgh, John, Texier, Nicolas, Theilade, Ida, Thomas, Duncan W., Thomas, Raquel, Thomas, Sean C., Tirado, Milton, Toirambe, Benjamin, de Toledo, José Julio, Tomlinson, Kyle W., Torres-Lezama, Armando, Tran, Hieu Dang, Tshibamba Mukendi, John, Tumaneng, Roven D., Umaña, Maria Natalia, Umunay, Peter M., Urrego Giraldo, Ligia Estela, Valderrama Sandoval, Elvis H., Valenzuela Gamarra, Luis, Van Andel, Tinde R., van de Bult, Martin, van de Pol, Jaqueline, van der Heijden, Geertje, Vasquez, Rodolfo, Vela, César I.A., Venticinque, Eduardo Martins, Verbeeck, Hans, Veridiano, Rizza Karen A., Vicentini, Alberto, Vieira, Ima Célia Guimarães, Vilanova Torre, Emilio, Villarroel, Daniel, Villa Zegarra, Boris Eduardo, Vleminckx, Jason, von Hildebrand, Patricio, Vos, Vincent Antoine, Vriesendorp, Corine, Webb, Edward L., White, Lee J.T., Wich, Serge, Wittmann, Florian, Zagt, Roderick, Zang, Runguo, Zartman, Charles Eugene, Zemagho, Lise, Zent, Egleé L., and Zent, Stanford

Abstract

Trees structure the Earth’s most biodiverse ecosystem, tropical forests. The vast number of tree species presents a formidable challenge to understanding these forests, including their response to environmental change, as very little is known about most tropical tree species. A focus on the common species may circumvent this challenge. Here we investigate abundance patterns of common tree species using inventory data on 1,003,805 trees with trunk diameters of at least 10 cm across 1,568 locations1,2,3,4,5,6 in closed-canopy, structurally intact old-growth tropical forests in Africa, Amazonia and Southeast Asia. We estimate that 2.2%, 2.2% and 2.3% of species comprise 50% of the tropical trees in these regions, respectively. Extrapolating across all closed-canopy tropical forests, we estimate that just 1,053 species comprise half of Earth’s 800 billion tropical trees with trunk diameters of at least 10 cm. Despite differing biogeographic, climatic and anthropogenic histories7, we find notably consistent patterns of common species and species abundance distributions across the continents. This suggests that fundamental mechanisms of tree community assembly may apply to all tropical forests. Resampling analyses show that the most common species are likely to belong to a manageable list of known species, enabling targeted efforts to understand their ecology. Although they do not detract from the importance of rare species, our results open new opportunities to understand the world’s most diverse forests, including modelling their response to environmental change, by focusing on the common species that constitute the majority of their trees.

Published
2024

24. Capacity for recovery in Bornean orangutan populations when limiting offtake and retaining forest

Author

Seaman, David James Ian, Voigt, Maria, Ancrenaz, Marc, Bocedi, Greta, Meijaard, Erik, Oram, Felicity, Palmer, Stephen C.F., Santika, Truly, Sherman, Julie, Travis, Justin M.J., Wich, Serge, Humle, Tatyana, Supriatna, Jatna, Struebig, Matthew J., Seaman, David James Ian, Voigt, Maria, Ancrenaz, Marc, Bocedi, Greta, Meijaard, Erik, Oram, Felicity, Palmer, Stephen C.F., Santika, Truly, Sherman, Julie, Travis, Justin M.J., Wich, Serge, Humle, Tatyana, Supriatna, Jatna, and Struebig, Matthew J.

Abstract

Aim: We assess the potential long-term viability of orangutan populations across Borneo, considering the effects of habitat loss, and various forms of population reduction, including hunting, retaliatory killings, and capture and translocation. Location: The study focused on the island of Borneo, a region that has experienced substantial deforestation over the past four decades, resulting in the degradation and fragmentation of its lowland forests, thereby threatening the island's unique biodiversity, including orangutan populations. Methods: To evaluate the long-term viability of orangutan populations, we employed a spatially-explicit individual-based model. This model allowed us to simulate various scenarios, including the impact of removing habitat fragments or individuals from the population. Results: Our findings revealed that small forest fragments facilitate orangutan movement, thereby increasing the number of individuals settling in non-natal patches. Crucially, orangutan populations proved highly vulnerable to even small levels of offtake. Annual removal rates exceeding 2% diminished the positive role of small forest patches in sustaining population connectivity, the long-term viability of populations and prospects for recovery. Main Conclusions: Our results suggest that orangutan populations in Borneo could potentially recover from recent declines if removal of orangutans by hunting, retaliatory killings, capture and translocation is reduced, and habitat connectivity is maintained within human-modified landscapes. These findings emphasize the urgent need for conservation strategies that mitigate negative human-wildlife interactions, and/or help preserve habitat and fragments as stepping stones. Measures could include promoting coexistence with local communities and translocating orangutans only in rare cases where no suitable alternative exists, to ensure the long-term survival of orangutan populations in Borneo.

Published
2024

26. Drones for conservation

Author

Wich, Serge A., primary, Hudson, Mike, additional, Andrianandrasana, Herizo, additional, and Longmore, Steven N., additional

Published
2021
Full Text
View/download PDF

28. The environmental impacts of palm oil in context

Author

Meijaard, Erik, Brooks, Thomas M., Carlson, Kimberly M., Slade, Eleanor M., Garcia-Ulloa, John, Gaveau, David L. A., Lee, Janice Ser Huay, Santika, Truly, Juffe-Bignoli, Diego, Struebig, Matthew J., Wich, Serge A., Ancrenaz, Marc, Koh, Lian Pin, Zamira, Nadine, Abrams, Jesse F., Prins, Herbert H. T., Sendashonga, Cyriaque N., Murdiyarso, Daniel, Furumo, Paul R., Macfarlane, Nicholas, Hoffmann, Rachel, Persio, Marcos, Descals, Adrià, Szantoi, Zoltan, and Sheil, Douglas

Published
2020
Full Text
View/download PDF

29. Coming down from the trees: is terrestrial activity in Bornean orangutans natural or disturbance driven?

Author

Ancrenaz, Marc, Sollmann, Rahel, Meijaard, Erik, Hearn, Andrew J, Ross, Joanna, Samejima, Hiromitsu, Loken, Brent, Cheyne, Susan M, Stark, Danica J, Gardner, Penny C, Goossens, Benoit, Mohamed, Azlan, Bohm, Torsten, Matsuda, Ikki, Nakabayasi, Miyabi, Lee, Shan Khee, Bernard, Henry, Brodie, Jedediah, Wich, Serge, Fredriksson, Gabriella, Hanya, Goro, Harrison, Mark E, Kanamori, Tomoko, Kretzschmar, Petra, Macdonald, David W, Riger, Peter, Spehar, Stephanie, Ambu, Laurentius N, and Wilting, Andreas

Subjects
Animals, Pongo pygmaeus, Models, Statistical, Behavior, Animal, Ecosystem, Video Recording, Female, Male, Models, Statistical, Behavior, Animal
Abstract

The orangutan is the world's largest arboreal mammal, and images of the red ape moving through the tropical forest canopy symbolise its typical arboreal behaviour. Records of terrestrial behaviour are scarce and often associated with habitat disturbance. We conducted a large-scale species-level analysis of ground-based camera-trapping data to evaluate the extent to which Bornean orangutans Pongo pygmaeus come down from the trees to travel terrestrially, and whether they are indeed forced to the ground primarily by anthropogenic forest disturbances. Although the degree of forest disturbance and canopy gap size influenced terrestriality, orangutans were recorded on the ground as frequently in heavily degraded habitats as in primary forests. Furthermore, all age-sex classes were recorded on the ground (flanged males more often). This suggests that terrestrial locomotion is part of the Bornean orangutan's natural behavioural repertoire to a much greater extent than previously thought, and is only modified by habitat disturbance. The capacity of orangutans to come down from the trees may increase their ability to cope with at least smaller-scale forest fragmentation, and to cross moderately open spaces in mosaic landscapes, although the extent of this versatility remains to be investigated.

Published
2014

30. Global mapping of oil palm planting year from 1990 to 2021.

Author

Descals, Adrià, Gaveau, David L. A., Wich, Serge, Szantoi, Zoltan, and Meijaard, Erik

Subjects
OIL palm, DEEP learning, CONVOLUTIONAL neural networks, LAND use planning, VEGETABLE oils
Abstract

Oil palm is a controversial crop, primarily because it is associated with negative environmental impacts such as tropical deforestation. Mapping the crop and its characteristics, such as age, is crucial for informing public and policy discussions regarding these impacts. Oil palm has received substantial mapping efforts, but up-to-date accurate oil palm maps for both extent and age are essential for monitoring impacts and informing concomitant debate. Here, we present a 10-meter resolution global map of industrial and smallholder oil palm, developed using Sentinel-1 data for the years 2016–2021 and a deep learning model based on convolutional neural networks. In addition, we used Landsat-5, -7, and -8 to estimate the planting year from 1990 to 2021 at a 30-meter spatial resolution. The planting year indicates the year of establishment for an oil palm plantation as of 2021, either newly planted or replanted oil palm in an existing plantation. We validated the oil palm extent layer using 17,812 randomly distributed reference points. The accuracy of the planting year layer was assessed using field data collected from 5,831 industrial parcels and 1,012 smallholder plantations distributed throughout the oil palm growing area. We found oil palm plantations covering a total mapped area of 23.98 Mha, and our area estimates are 16.66 ± 0.25 Mha of industrial and 7.59 ± 0.29 Mha of smallholder oil palm worldwide. The producers' and users' accuracy is 91.9 ± 3.4 % and 91.8 ± 1.0 % for industrial plantations, and 72.7 ± 1.3 % and 75.7 ± 2.5 % for smallholders, which improves upon a previous global oil palm dataset, particularly in terms of omission of oil palm. The overall mean error between estimated planting year and field data was -0.24 years and the root-mean-square error was 2.65 years, but the agreement was lower for smallholders. Mapping the extent and planting year of smallholder plantations remains challenging, particularly for wild and sparsely planted oil palm, and future mapping efforts should focus on these specific types of plantations. The average oil palm plantation age was 14.1 years, and the area of oil palm over 20 years was 6.28 Mha. Given that oil palm plantations are typically replanted after 25 years, our findings indicate that this area will require replanting within the coming decade, starting from 2021. Our dataset provides valuable input for optimal land use planning to meet the growing global demand for vegetable oils. The global oil palm extent layer for the year 2021 and the planting year layer from 1990 to 2021 can be found at https://doi.org/10.5281/zenodo.11034131 (Descals, 2024). [ABSTRACT FROM AUTHOR]

Published
2024
Full Text
View/download PDF

31. Apes and agriculture

Author

Meijaard, Erik, primary, Unus, Nabillah, additional, Ariffin, Thina, additional, Dennis, Rona, additional, Ancrenaz, Marc, additional, Wich, Serge, additional, Wunder, Sven, additional, Goh, Chun Sheng, additional, Sherman, Julie, additional, Ogwu, Matthew C., additional, Refisch, Johannes, additional, Ledgard, Jonathan, additional, Sheil, Douglas, additional, and Hockings, Kimberley, additional

Published
2023
Full Text
View/download PDF

32. High-resolution global map of closed-canopy coconut palm

Author

Descals, Adrià, primary, Wich, Serge, additional, Szantoi, Zoltan, additional, Struebig, Matthew J., additional, Dennis, Rona, additional, Hatton, Zoe, additional, Ariffin, Thina, additional, Unus, Nabillah, additional, Gaveau, David L. A., additional, and Meijaard, Erik, additional

Published
2023
Full Text
View/download PDF

33. Capacity for recovery in Bornean orangutan populations if forest fragmentation and offtake is limited

Author

Seaman, Dave, primary, Voigt, Maria, additional, Ancernaz, Marc, additional, Bocedi, Greta, additional, Meijaard, Erik, additional, Oram, Felicity, additional, Palmer, Stephen, additional, Santika, Truly, additional, Sherman, Julie, additional, Travis, Justin, additional, Wich, Serge, additional, Humle, Tatyana, additional, Supriatna, Jatna, additional, and Stuebig, Matthew, additional

Published
2023
Full Text
View/download PDF

35. Phylogenetic classification of the world’s tropical forests

Author

Slik, J. W. Ferry, Franklin, Janet, Arroyo-Rodríguez, Víctor, Field, Richard, Aguilar, Salomon, Aguirre, Nikolay, Ahumada, Jorge, Aiba, Shin-Ichiro, Alves, Luciana F., K, Anitha, Avella, Andres, Mora, Francisco, Aymard C., Gerardo A., Báez, Selene, Balvanera, Patricia, Bastian, Meredith L., Bastin, Jean-François, Bellingham, Peter J., van den Berg, Eduardo, da Conceição Bispo, Polyanna, Boeckx, Pascal, Boehning-Gaese, Katrin, Bongers, Frans, Boyle, Brad, Brambach, Fabian, Brearley, Francis Q., Brown, Sandra, Chai, Shauna-Lee, Chazdon, Robin L., Chen, Shengbin, Chhang, Phourin, Chuyong, George, Ewango, Corneille, Coronado, Indiana M., Cristóbal-Azkarate, Jurgi, Culmsee, Heike, Damas, Kipiro, Dattaraja, H. S., Davidar, Priya, DeWalt, Saara J., Din, Hazimah, Drake, Donald R., Duque, Alvaro, Durigan, Giselda, Eichhorn, Karl, Eler, Eduardo Schmidt, Enoki, Tsutomu, Ensslin, Andreas, Fandohan, Adandé Belarmain, Farwig, Nina, Feeley, Kenneth J., Fischer, Markus, Forshed, Olle, Garcia, Queila Souza, Garkoti, Satish Chandra, Gillespie, Thomas W., Gillet, Jean-Francois, Gonmadje, Christelle, la Cerda, Iñigo Granzow-de, Griffith, Daniel M., Grogan, James, Hakeem, Khalid Rehman, Harris, David J., Harrison, Rhett D., Hector, Andy, Hemp, Andreas, Homeier, Jürgen, Hussain, M. Shah, Ibarra-Manríquez, Guillermo, Hanum, I. Faridah, Imai, Nobuo, Jansen, Patrick A., Joly, Carlos Alfredo, Joseph, Shijo, Kartawinata, Kuswata, Kearsley, Elizabeth, Kelly, Daniel L., Kessler, Michael, Killeen, Timothy J., Kooyman, Robert M., Laumonier, Yves, Laurance, Susan G., Laurance, William F., Lawes, Michael J., Letcher, Susan G., Lindsell, Jeremy, Lovett, Jon, Lozada, Jose, Lu, Xinghui, Lykke, Anne Mette, Mahmud, Khairil Bin, Mahayani, Ni Putu Diana, Mansor, Asyraf, Marshall, Andrew R., Martin, Emanuel H., Matos, Darley Calderado Leal, Meave, Jorge A., Melo, Felipe P. L., Mendoza, Zhofre Huberto Aguirre, Metali, Faizah, Medjibe, Vincent P., Metzger, Jean Paul, Metzker, Thiago, Mohandass, D., Munguía-Rosas, Miguel A., Muñoz, Rodrigo, Nurtjahy, Eddy, de Oliveira, Eddie Lenza, Parolin, Pia, Parren, Marc, Parthasarathy, N., Paudel, Ekananda, Perez, Rolando, Pérez-García, Eduardo A., Pommer, Ulf, Poorter, Lourens, Qie, Lan, Piedade, Maria Teresa F., Pinto, José Roberto Rodrigues, Poulsen, Axel Dalberg, Poulsen, John R., Powers, Jennifer S., Prasad, Rama Chandra, Puyravaud, Jean-Philippe, Rangel, Orlando, Reitsma, Jan, Rocha, Diogo S. B., Rolim, Samir, Rovero, Francesco, Rozak, Andes, Ruokolainen, Kalle, Rutishauser, Ervan, Rutten, Gemma, Said, Mohd. Nizam Mohd., Saiter, Felipe Z., Saner, Philippe, Santos, Braulio, dos Santos, João Roberto, Sarker, Swapan Kumar, Schmitt, Christine B., Schoengart, Jochen, Schulze, Mark, Sheil, Douglas, Sist, Plinio, Souza, Alexandre F., Spironello, Wilson Roberto, Sposito, Tereza, Steinmetz, Robert, Stevart, Tariq, Suganuma, Marcio Seiji, Sukri, Rahayu, Sultana, Aisha, Sukumar, Raman, Sunderland, Terry, Suresh, H. S., Suzuki, Eizi, Tabarelli, Marcelo, Tang, Jianwei, Tanner, Ed V. J., Targhetta, Natalia, Theilade, Ida, Thomas, Duncan, Timberlake, Jonathan, de Morisson Valeriano, Márcio, van Valkenburg, Johan, Van Do, Tran, Van Sam, Hoang, Vandermeer, John H., Verbeeck, Hans, Vetaa, Ole Reidar, Adekunle, Victor, Vieira, Simone A., Webb, Campbell O., Webb, Edward L., Whitfeld, Timothy, Wich, Serge, Williams, John, Wiser, Susan, Wittmann, Florian, Yang, Xiaobo, Yao, C. Yves Adou, Yap, Sandra L., Zahawi, Rakan A., Zakaria, Rahmad, and Zang, Runguo

Published
2018

36. Barriers to chimpanzee gene flow at the south‐east edge of their distribution

Author

Bonnin, Noémie, primary, Piel, Alex K., additional, Brown, Richard P., additional, Li, Yingying, additional, Connell, Andrew Jesse, additional, Avitto, Alexa N., additional, Boubli, Jean P., additional, Chitayat, Adrienne, additional, Giles, Jasmin, additional, Gundlapally, Madhurima S., additional, Lipende, Iddi, additional, Lonsdorf, Elizabeth V., additional, Mjungu, Deus, additional, Mwacha, Dismas, additional, Pintea, Lilian, additional, Pusey, Anne E., additional, Raphael, Jane, additional, Wich, Serge A., additional, Wilson, Michael L., additional, Wroblewski, Emily E., additional, Hahn, Beatrice H., additional, and Stewart, Fiona A., additional

Published
2023
Full Text
View/download PDF

38. Nature Conservation Drones for Automatic Localization and Counting of Animals

Author

van Gemert, Jan C., Verschoor, Camiel R., Mettes, Pascal, Epema, Kitso, Koh, Lian Pin, Wich, Serge, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Weikum, Gerhard, Series editor, Agapito, Lourdes, editor, Bronstein, Michael M., editor, and Rother, Carsten, editor

Published
2015
Full Text
View/download PDF

42. Restoring the orangutan in a Whole- or Half-Earth context

Author

Meijaard, Erik, Sheil, Douglas, Sherman, Julie, Chua, Liana, Ni'matullah, Safwanah, Wilson, Kerrie, Ancrenaz, Marc, Liswanto, Darmawan, Wich, Serge A., Goossens, Benoit, Kühl, Hjalmar S., Voigt, Maria, Rayadin, Yaya, Kurniawan, Yuyun, Trianto, Agus, Priatna, Dolly, Banes, Graham L., Massingham, Emily, Payne, John, Marshall, Andrew J., Meijaard, Erik, Sheil, Douglas, Sherman, Julie, Chua, Liana, Ni'matullah, Safwanah, Wilson, Kerrie, Ancrenaz, Marc, Liswanto, Darmawan, Wich, Serge A., Goossens, Benoit, Kühl, Hjalmar S., Voigt, Maria, Rayadin, Yaya, Kurniawan, Yuyun, Trianto, Agus, Priatna, Dolly, Banes, Graham L., Massingham, Emily, Payne, John, and Marshall, Andrew J.

Abstract

Various global-scale proposals exist to reduce the loss of biological diversity. These include the Half-Earth and Whole-Earth visions that respectively seek to set aside half the planet for wildlife conservation or to diversify conservation practices fundamentally and change the economic systems that determine environmental harm. Here we assess these visions in the specific context of Bornean orangutans Pongo pygmaeus and their conservation. Using an expert-led process we explored three scenarios over a 10-year time frame: continuation of Current Conditions, a Half-Earth approach and a Whole-Earth approach. In addition, we examined a 100-year population recovery scenario assuming 0% offtake of Bornean orangutans. Current Conditions were predicted to result in a population c. 73% of its current size by 2032. Half-Earth was judged comparatively easy to achieve and predicted to result in an orangutan population of c. 87% of its current size by 2032. Whole-Earth was anticipated to lead to greater forest loss and ape killing, resulting in a prediction of c. 44% of the current orangutan population for 2032. Finally, under the recovery scenario, populations could be c. 148% of their current size by 2122. Although we acknowledge uncertainties in all of these predictions, we conclude that the Half-Earth and Whole-Earth visions operate along different timelines, with the implementation of Whole-Earth requiring too much time to benefit orangutans. None of the theorized proposals provided a complete solution, so drawing elements from each will be required. We provide recommendations for equitable outcomes.

Published
2023

43. Apes and agriculture

Author

Meijaard, Erik, Unus, Nabillah, Ariffin, Thina, Dennis, Rona, Ancrenaz, Marc, Wich, Serge, Wunder, Sven, Goh, Chun Sheng, Sherman, Julie, Ogwu, Matthew C., Refisch, Johannes, Ledgard, Jonathan, Sheil, Douglas, Hockings, Kimberley, Meijaard, Erik, Unus, Nabillah, Ariffin, Thina, Dennis, Rona, Ancrenaz, Marc, Wich, Serge, Wunder, Sven, Goh, Chun Sheng, Sherman, Julie, Ogwu, Matthew C., Refisch, Johannes, Ledgard, Jonathan, Sheil, Douglas, and Hockings, Kimberley

Abstract

Non-human great apes – chimpanzees, gorillas, bonobos, and orangutans – are threatened by agricultural expansion, particularly from rice, cacao, cassava, maize, and oil palm cultivation. Agriculture replaces and fragments great ape habitats, bringing them closer to humans and often resulting in conflict. Though the impact of agriculture on great apes is well-recognized, there is still a need for a more nuanced understanding of specific contexts and associated negative impacts on habitats and populations. Here we review these contexts and their implications for great apes. We estimate that within their African and South-East Asian ranges, there are about 100 people for each great ape. Given that most apes live outside strictly protected areas and the growing human population and increasing demand for resources in these landscapes, it will be challenging to balance the needs of both humans and great apes. Further habitat loss is expected, particularly in Africa, where compromises must be sought to re-direct agricultural expansion driven by subsistence farmers with small fields (generally <0.64 ha) away from remaining great ape habitats. To promote coexistence between humans and great apes, new approaches and financial models need to be implemented at local scales. Overall, optimized land use planning and effective implementation, along with strategic investments in agriculture and wildlife conservation, can improve the synergies between conservation and food production. Effective governance and conservation financing are crucial for optimal outcomes in both conservation and food security. Enforcing forest conservation laws, engaging in trade policy discussions, and integrating policies on trade, food security, improved agricultural techniques, and sustainable food systems are vital to prevent further decline in great ape populations. Saving great apes requires a thorough consideration of specific agricultural contexts.

Published
2023

Catalog

Books, media, physical & digital resources
See catalog results