84 results on '"Ahmadia, Gabby"'
Search Results
52. A theory‐based framework for understanding the establishment, persistence, and diffusion of community‐based conservation
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Mahajan, Shauna L., primary, Jagadish, Arundhati, additional, Glew, Louise, additional, Ahmadia, Gabby, additional, Becker, Hannah, additional, Fidler, Robert Y., additional, Jeha, Lena, additional, Mills, Morena, additional, Cox, Courtney, additional, DeMello, Nicole, additional, Harborne, Alastair R., additional, Masuda, Yuta J., additional, McKinnon, Madeleine C., additional, Painter, Michael, additional, Wilkie, David, additional, and Mascia, Michael B., additional
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- 2020
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- View/download PDF
53. Multi-scale estimation of the effects of pressures and drivers on mangrove forest loss globally
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Turschwell, Mischa P., primary, Tulloch, Vivitskaia J.D., additional, Sievers, Michael, additional, Pearson, Ryan M., additional, Andradi-Brown, Dominic A., additional, Ahmadia, Gabby N., additional, Connolly, Rod M., additional, Bryan-Brown, Dale, additional, Lopez-Marcano, Sebastian, additional, Adame, Maria Fernanda, additional, and Brown, Christopher J., additional
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- 2020
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54. Supplementary Information for Social-environmental drivers inform strategic management of coral reefs in the Anthropocene
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Darling, Emily S., McClanahan, Tim R., Maina, Joseph, Gurney, Georgina G., Graham, Nicholas A. J., Januchowski-Hartley, Fraser, Cinner, Joshua E., Mora, Camilo, Hicks, Christina C., Maire, Eva, Puotinen, Marji, Skirving, William J., Adjeroud, Mehdi, Ahmadia, Gabby, Arthur, Rohan, Bauman, Andrew G., Beger, Maria, Berumen, Michael L., Bigot, Lionel, Bouwmeester, Jessica, Brenier, Ambroise, Bridge, Tom C. L., Brown, Eric, Campbell, Stuart J., Cannon, Sara, Cauvin, Bruce, Allen Chen, Chaolun, Claudet, Joachim, Denis, Vianney, Donner, Simon, Estradivari, Fadli, Nur, Feary, David A., Fenner, Douglas, Fox, Helen, Franklin, Erik C., Friedlander, Alan M., Gilmour, James, Goiran, Claire, Guest, James, Hobbs, Jean-Paul A., Hoey, Andrew S., Houk, Peter, Johnson, Steven, Jupiter, Stacy D., Kayal, Mohsen, Kuo, Chao-yang, Lamb, Joleah, Lee, Michelle A. C., Low, Jeffrey, Muthiga, Nyawira, Muttaqin, Efin, Nand, Yashika, Nash, Kirsty L., Nedlic, Osamu, Pandolfi, John M., Pardede, Shinta, Patankar, Vardhan, Penin, Lucie, Ribas-Deulofeu, Lauriane, Richards, Zoe, Roberts, T. Edward, Rodgers, Ku’ulei S., Safuan, Che Din Mohd, Sala, Enric, Shedrawi, George, Sin, Tsai Min, Smallhorn-West, Patrick, Smith, Jennifer E., Sommer, Brigitte, Steinberg, Peter D., Sutthacheep, Makamas, Tan, Chun Hong James, Williams, Gareth J., Wilson, Shaun, Yeemin, Thamasak, Bruno, John F., Fortin, Marie-Josée, Krkosek, Martin, Mouillot, David, Darling, Emily S., McClanahan, Tim R., Maina, Joseph, Gurney, Georgina G., Graham, Nicholas A. J., Januchowski-Hartley, Fraser, Cinner, Joshua E., Mora, Camilo, Hicks, Christina C., Maire, Eva, Puotinen, Marji, Skirving, William J., Adjeroud, Mehdi, Ahmadia, Gabby, Arthur, Rohan, Bauman, Andrew G., Beger, Maria, Berumen, Michael L., Bigot, Lionel, Bouwmeester, Jessica, Brenier, Ambroise, Bridge, Tom C. L., Brown, Eric, Campbell, Stuart J., Cannon, Sara, Cauvin, Bruce, Allen Chen, Chaolun, Claudet, Joachim, Denis, Vianney, Donner, Simon, Estradivari, Fadli, Nur, Feary, David A., Fenner, Douglas, Fox, Helen, Franklin, Erik C., Friedlander, Alan M., Gilmour, James, Goiran, Claire, Guest, James, Hobbs, Jean-Paul A., Hoey, Andrew S., Houk, Peter, Johnson, Steven, Jupiter, Stacy D., Kayal, Mohsen, Kuo, Chao-yang, Lamb, Joleah, Lee, Michelle A. C., Low, Jeffrey, Muthiga, Nyawira, Muttaqin, Efin, Nand, Yashika, Nash, Kirsty L., Nedlic, Osamu, Pandolfi, John M., Pardede, Shinta, Patankar, Vardhan, Penin, Lucie, Ribas-Deulofeu, Lauriane, Richards, Zoe, Roberts, T. Edward, Rodgers, Ku’ulei S., Safuan, Che Din Mohd, Sala, Enric, Shedrawi, George, Sin, Tsai Min, Smallhorn-West, Patrick, Smith, Jennifer E., Sommer, Brigitte, Steinberg, Peter D., Sutthacheep, Makamas, Tan, Chun Hong James, Williams, Gareth J., Wilson, Shaun, Yeemin, Thamasak, Bruno, John F., Fortin, Marie-Josée, Krkosek, Martin, and Mouillot, David
- Published
- 2019
55. The Bird's Head Seascape Marine Protected Area network—Preventing biodiversity and ecosystem service loss amidst rapid change in Papua, Indonesia.
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Purwanto, Andradi‐Brown, Dominic A., Matualage, Dariani, Rumengan, Irman, Awaludinnoer, Pada, Defy, Hidayat, Nur I., Amkieltiela, Fox, Helen E., Fox, Matt, Mangubhai, Sangeeta, Hamid, La, Lazuardi, Muhammad E., Mambrasar, Ronald, Maulana, Nugraha, Mulyadi, Tuharea, Syafri, Pakiding, Fitryanti, and Ahmadia, Gabby N.
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BIRD'S Head Seascape (Indonesia) ,MARINE biodiversity ,MARINE parks & reserves ,CORAL reefs & islands ,MANGROVE forests - Abstract
The Bird's Head Seascape (BHS), Papua, Indonesia is located within the epicenter of global marine biodiversity and has been the focus of recent conservation efforts to protect marine resources. Here, we provide an overview of Marine Protected Areas (MPAs) progress in the BHS over the past decade, including establishment history, changes in management effectiveness and ecosystem health, as well as examining trends in tourism growth. While generally viewed as a conservation success story, we reflect on both successes and challenges in the BHS, identifying where we need to continue to improve and adapt in response to rapid economic and environmental change. As of 2020, BHS MPAs cover 5.1 million ha across 23 MPAs. As expected, management effectiveness is steadily increasing in BHS MPAs—although newer MPAs face substantial capacity gaps. Tourism is rapidly growing—with an almost 3,000% increase in tourist visits between 2007 and 2018. Overall, hard coral cover in monitored BHS MPAs remained stable at 33% from 2010 to 2019, although trends in reef fish biomass were more variable. Given continued conservation challenges in the region, BHS MPAs are successfully preventing biodiversity loss while providing ecosystem services for local communities. [ABSTRACT FROM AUTHOR]
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- 2021
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56. Debating the effectiveness of marine protected areas Introduction
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Pendleton, Linwood H., Ahmadia, Gabby N., Browman, Howard I., Thurstan, Ruth H., Kaplan, David M., Bartolino, Valerio, WWF, Virginia Institute of Marine Science (VIMS), MARine Biodiversity Exploitation and Conservation (UMR MARBEC), and Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)
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Aichi ,monitoring ,[SDV.EE.ECO]Life Sciences [q-bio]/Ecology, environment/Ecosystems ,[SDE.MCG]Environmental Sciences/Global Changes ,conservation ,targets ,benefits ,[SDE.BE]Environmental Sciences/Biodiversity and Ecology ,sustainable development goals - Abstract
International audience; Increasing the size and number of marine protected areas (MPAs) is widely seen as a way to meet ambitious biodiversity and sustainable development goals. Yet, debate still exists on the effectiveness of MPAs in achieving ecological and societal objectives. Although the literature provides significant evidence of the ecological effects of MPAs within their boundaries, much remains to be learned about the ecological and social effects of MPAs on regional and seascape scales. Key to improving the effectiveness of MPAs, and ensuring that they achieve desired outcomes, will be better monitoring that includes ecological and social data collected inside and outside of MPAs. This can lead to more conclusive evidence about what is working, what is not, and why. Eight authors were asked to write about their experiences with MPA effectiveness. The authors were instructed to clearly define \textquotedbllefteffectiveness\textquotedblright and discuss the degree to which they felt MPAs had achieved or failed to be effective. Essays were exchanged among authors and each was invited to write a shorter \textquotedblleftcounterpoint.\textquotedblright The exercise shows that, while experiences are diverse, many authors found common ground regarding the role of MPAs in achieving conservation targets. This exchange of perspectives is intended to promote reflection, analysis, and dialogue as a means for improving MPA design, assessment, and integration with other conservation tools.
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- 2018
57. Coral Reef Conservation Solution-Scape White Paper
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Wenger, Amelia, primary, Ahmadia, Gabby, additional, Álvarez-Romero, Jorge Gabriel, additional, Barnes, Megan, additional, Blythe, Jessica L., additional, Brodie, Jon, additional, Day, Jon C., additional, Fox, Helen E., additional, Gill, David, additional, Gomez, Nicole Auil, additional, Gurney, Georgina G., additional, Holmes, Katherine, additional, Jupiter, Stacy, additional, Lamb, Joleah B., additional, Mangubhai, Sangeeta, additional, Matthews, Elizabeth, additional, Pressey, Robert L., additional, Teneva, Lida T., additional, Tewfik, Alexander, additional, Wells, Sue, additional, and Darling, Emily, additional
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- 2019
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58. Systems thinking for planning and evaluating conservation interventions
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Mahajan, Shauna L., primary, Glew, Louise, additional, Rieder, Erica, additional, Ahmadia, Gabby, additional, Darling, Emily, additional, Fox, Helen E., additional, Mascia, Michael B., additional, and McKinnon, Madeleine, additional
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- 2019
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59. Reserve sizes needed to protect coral reef fishes
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Krueck, Nils C., Legrand, Christelle, Ahmadia, Gabby N., Estradivari, Green, Alison, Jones, Geoffrey P., Riginos, Cynthia, Treml, Eric A., Mumby, Peter J., Krueck, Nils C., Legrand, Christelle, Ahmadia, Gabby N., Estradivari, Green, Alison, Jones, Geoffrey P., Riginos, Cynthia, Treml, Eric A., and Mumby, Peter J.
- Abstract
Marine reserves are a commonly applied conservation tool, but their size is often chosen based on considerations of socioeconomic rather than ecological impact. Here, we use a simple individual‐based model together with the latest empirical information on home ranges, densities and schooling behaviour in 66 coral reef fishes to quantify the conservation effectiveness of various reserve sizes. We find that standard reserves with a diameter of 1–2 km can achieve partial protection (≥50% of the maximum number of individuals) of 56% of all simulated species. Partial protection of the most important fishery species, and of species with diverse functional roles, required 2–10 km wide reserves. Full protection of nearly all simulated species required 100 km wide reserves. Linear regressions based on the mean home range and density, and even just the maximum length, of fish species approximated these results reliably, and can therefore be used to support locally effective decision making.
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- 2018
60. A theory‐based framework for understanding the establishment, persistence, and diffusion of community‐based conservation.
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Mahajan, Shauna L., Jagadish, Arundhati, Glew, Louise, Ahmadia, Gabby, Becker, Hannah, Fidler, Robert Y., Jeha, Lena, Mills, Morena, Cox, Courtney, DeMello, Nicole, Harborne, Alastair R., Masuda, Yuta J., McKinnon, Madeleine C., Painter, Michael, Wilkie, David, and Mascia, Michael B.
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BIODIVERSITY conservation ,CONSERVATION organizations ,STAKEHOLDERS ,SOCIAL sciences ,SCIENTISTS - Abstract
Over decades, biodiversity conservation researchers and practitioners have developed theories and conceptual frameworks to inform the planning, implementation, and evaluation of community‐based conservation (CBC). While a diversity of mechanisms for understanding and supporting CBC has helped tailor approaches to local needs and conditions, the absence of a unified lens to understand CBC has limited the capacity for integrating foundational theory into practice more systemically, and for learning across different projects, stakeholders, and institutions. We introduce a theory‐based framework called "the CBC framework" that draws upon three foundational theories from sociology, economics, and political science to understand the establishment, persistence, and diffusion of CBC. Experience applying aspects of the framework within different conservation organizations demonstrates how this integrative approach can provide a gateway for practitioners to engage with social science theory to understand the status and context of CBC interventions and efforts. For practitioners, scientists, evaluators, and strategists, the framework can guide the design of CBC interventions and monitoring and evaluation systems to facilitate theory‐based learning and enable evidence‐informed decision‐making. Approaches like the CBC framework that facilitate collaborative planning, evaluation, and research can help better integrate social science theory in conservation practice while increasing the capacity for conservation scientists, practitioners, and stakeholders to learn together and adaptively manage CBC to deliver positive results for both people and nature. [ABSTRACT FROM AUTHOR]
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- 2021
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61. Tradeoffs and Synergies in MPA impact for Social and Ecological Objectives in Indonesia
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Barnes, Megan, primary, Ahmadia, Gabby, additional, and Glew, Louise, additional
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- 2018
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62. Recruit young scientists and local talent to safeguard coral reefs
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Ahmadia, Gabby, primary
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- 2018
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63. Incorporating larval dispersal into MPA design for both conservation and fisheries
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Krueck, Nils C, Ahmadia, Gabby N, Green, Alison, Jones, Geoffrey P, Possingham, Hugh P, Riginos, Cynthia, Treml, Eric A, Mumby, Peter J, Krueck, Nils C, Ahmadia, Gabby N, Green, Alison, Jones, Geoffrey P, Possingham, Hugh P, Riginos, Cynthia, Treml, Eric A, and Mumby, Peter J
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- 2017
64. Marine reserve targets to sustain and rebuild unregulated fisheries
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Krueck, Nils C, Ahmadia, Gabby N, Possingham, Hugh P, Riginos, Cynthia, Treml, Eric A, Mumby, Peter J, Krueck, Nils C, Ahmadia, Gabby N, Possingham, Hugh P, Riginos, Cynthia, Treml, Eric A, and Mumby, Peter J
- Abstract
Overfishing threatens the sustainability of coastal marine biodiversity, especially in tropical developing countries. To counter this problem, about 200 governments worldwide have committed to protecting 10%-20% of national coastal marine areas. However, associated impacts on fisheries productivity are unclear and could weaken the food security of hundreds of millions of people who depend on diverse and largely unregulated fishing activities. Here, we present a systematic theoretic analysis of the ability of reserves to rebuild fisheries under such complex conditions, and we identify maximum reserve coverages for biodiversity conservation that do not impair long-term fisheries productivity. Our analysis assumes that fishers have no viable alternative to fishing, such that total fishing effort remains constant (at best). We find that realistic reserve networks, which protect 10%-30% of fished habitats in 1-20 km wide reserves, should benefit the long-term productivity of almost any complex fishery. We discover a "rule of thumb" to safeguard against the long-term catch depletion of particular species: individual reserves should export 30% or more of locally produced larvae to adjacent fishing grounds. Specifically on coral reefs, where fishers tend to overexploit species whose dispersal distances as larvae exceed the home ranges of adults, decisions on the size of reserves needed to meet the 30% larval export rule are unlikely to compromise the protection of resident adults. Even achieving the modest Aichi Target 11 of 10% "effective protection" can then help rebuild depleted catch. However, strictly protecting 20%-30% of fished habitats is unlikely to diminish catch even if overfishing is not yet a problem while providing greater potential for biodiversity conservation and fishery rebuilding if overfishing is substantial. These findings are important because they suggest that doubling or tripling the only globally enforced marine reserve target wi
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- 2017
65. A novel framework for analyzing conservation impacts:evaluation, theory, and marine protected areas
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Mascia, Michael B., Fox, Helen E., Glew, Louise, Ahmadia, Gabby N., Agrawal, Arun, Barnes, Megan, Basurto, Xavier, Craigie, Ian, Darling, Emily, Geldmann, Jonas, Gill, David, Rice, Susie Holst, Jensen, Olaf P., Lester, Sarah E., McConney, Patrick, Mumby, Peter J., Nenadovic, Mateja, Parks, John E., Pomeroy, Robert S., White, Alan T., Mascia, Michael B., Fox, Helen E., Glew, Louise, Ahmadia, Gabby N., Agrawal, Arun, Barnes, Megan, Basurto, Xavier, Craigie, Ian, Darling, Emily, Geldmann, Jonas, Gill, David, Rice, Susie Holst, Jensen, Olaf P., Lester, Sarah E., McConney, Patrick, Mumby, Peter J., Nenadovic, Mateja, Parks, John E., Pomeroy, Robert S., and White, Alan T.
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- 2017
66. Planning for the future: Incorporating global and local data to prioritize coral reef conservation
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Harris, Jill L., primary, Estradivari, E., additional, Fox, Helen E., additional, McCarthy, Orion S., additional, and Ahmadia, Gabby N., additional
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- 2017
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67. Debating the effectiveness of marine protected areas
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Pendleton, Linwood H, primary, Ahmadia, Gabby N, additional, Browman, Howard I, additional, Thurstan, Ruth H, additional, Kaplan, David M, additional, and Bartolino, Valerio, additional
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- 2017
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68. Marine Reserve Targets to Sustain and Rebuild Unregulated Fisheries
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Krueck, Nils C., primary, Ahmadia, Gabby N., additional, Possingham, Hugh P., additional, Riginos, Cynthia, additional, Treml, Eric A., additional, and Mumby, Peter J., additional
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- 2017
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69. Local-scale projections of coral reef futures and implications of the Paris Agreement
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van Hooidonk, Ruben, primary, Maynard, Jeffrey, additional, Tamelander, Jerker, additional, Gove, Jamison, additional, Ahmadia, Gabby, additional, Raymundo, Laurie, additional, Williams, Gareth, additional, Heron, Scott F., additional, and Planes, Serge, additional
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- 2016
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70. Rebuilding coral reefs: success (and failure) 16 years after low‐cost, low‐tech restoration.
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Fox, Helen E., Harris, Jill L., Darling, Emily S., Ahmadia, Gabby N., Estradivari, and Razak, Tries B.
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CORAL reefs & islands ,CORALS ,CORAL reef restoration ,TURBIDITY currents ,RATE of return ,NATIONAL parks & reserves - Abstract
Calls for coral reef restoration are increasing amidst continued declines, yet we know little about long‐term outcomes and conditions that lead to successful coral recovery. Here, we report on one of the longest monitoring studies following 16 years of large‐scale, "low‐tech" experimental reef rehabilitation on rubble fields created by chronic blast fishing in Komodo National Park, Indonesia. After blast fishing had stopped, in the absence of rehabilitation, hard coral cover in rubble fields remained about 3% from 1999 to 2016, but on rehabilitation treatments, cover increased from 0% in 2002 to 44.5% (±21.9% SD) in 2016. Coral cover varied among sites and treatments (ranging from <5 to >80% in 2016) in patterns that may reflect current strength and turbidity. Our results demonstrate that low‐tech substrate stabilization can facilitate natural coral recruitment and growth. We conclude that relatively low‐cost methods can deliver sustained rehabilitation of hard coral cover and that long‐term monitoring should be incorporated more widely in restoration activities to inform return on investment. [ABSTRACT FROM AUTHOR]
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- 2019
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71. Assessing relative resilience potential of coral reefs to inform management
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Maynard, Jeffrey A., primary, McKagan, Steven, additional, Raymundo, Laurie, additional, Johnson, Steven, additional, Ahmadia, Gabby N., additional, Johnston, Lyza, additional, Houk, Peter, additional, Williams, Gareth J., additional, Kendall, Matt, additional, Heron, Scott F., additional, van Hooidonk, Ruben, additional, Mcleod, Elizabeth, additional, Tracey, Dieter, additional, and Planes, Serge, additional
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- 2015
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72. Delineating Biophysical Environments of the Sunda Banda Seascape, Indonesia
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Wang, Mingshu, primary, Ahmadia, Gabby, additional, Chollett, Iliana, additional, Huang, Charles, additional, Fox, Helen, additional, Wijonarno, Anton, additional, and Madden, Marguerite, additional
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- 2015
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73. Modeling projected changes of mangrove biomass in different climatic scenarios in the Sunda Banda Seascapes.
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Wang, Mingshu, Madden, Marguerite, Hendy, Ian, Estradivari, and Ahmadia, Gabby N.
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MANGROVE plants ,BIOMASS ,VEGETATION & climate ,ATMOSPHERIC models ,MANGROVE ecology ,PLANT diversity ,SEAS - Abstract
Mangroves are critical in the ecological, economic and social development of coastal rural and urban communities. However, they are under threat by climate change and anthropogenic activities. The Sunda Banda Seascape (SBS), Indonesia, is among the world’s richest regions of mangrove biomass and biodiversity. To inform current and future management strategies, it is critical to provide estimates of how mangroves will respond to climate change in this region. Therefore, this paper utilized spatial analysis with model-based climatic indicators (temperature and precipitation) and mangrove distribution maps to estimate a benchmark for the mangrove biomass of the SBS in six scenarios, namely the Last Inter-glacial Period, the current scenario (1950–2000) and all four projected Representative Concentration Pathways in 2070 due to climate change. Despite mangroves gaining more biomass with climate change (the increase in CO2concentration), this paper highlighted the great proportion of below-ground biomass in mangrove forests. It also showed that the changes in spatial distribution of mangrove biomass became more variable in the context of climate change. As mangroves have been proposed as an essential component of climate change strategies, this study can serve as a baseline for future studies and resource management strategies. [ABSTRACT FROM PUBLISHER]
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- 2017
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74. Four new species of dwarfgobies (Teleostei: Gobiidae:Eviota) from the Austral, Gambier, Marquesas and Society Archipelagos, French Polynesia
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Tornabene, Luke, primary, Ahmadia, Gabby N., additional, and Williams, Jeffrey T., additional
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- 2013
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75. Evolution of microhabitat association and morphology in a diverse group of cryptobenthic coral reef fishes (Teleostei: Gobiidae: Eviota)
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Tornabene, Luke, primary, Ahmadia, Gabby N., additional, Berumen, Michael L., additional, Smith, Dave J., additional, Jompa, Jamaluddin, additional, and Pezold, Frank, additional
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- 2013
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76. Delineating Biophysical Environments of the Sunda Banda Seascape, Indonesia.
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Mingshu Wang, Ahmadia, Gabby N., Chollett, Iliana, Huang, Charles, Fox, Helen Fox, Wijonarno, Anton, and Madden, Marguerite
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- 2015
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77. Biodiversity needs every tool in the box: use OECMs
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Friedman, Whitney, Gurney, Georgina, Darling, Emily, Ahmadia, Gabby, Agostini, Vera, Ban, Natalie, Blythe, Jessica, Claudet, Joachim, Epstein, Graham, Estradivari, Estradivari, Himes-Cornell, Amber, Jonas, Harry, Armitage, Derek, Campbell, Stuart, Cox, Courtney, Friedman, Whitney., Gill, David, Lestari, Peni, Mangubhai, Sangeeta, Mcleod, Elizabeth, Muthiga, Nyawira, Naggea, Josheena, Ranaivoson, Ravaka, Wenger, Amelia, Yulianto, Irfan, Jupiter, Stacy, Centre National de la Recherche Scientifique (CNRS), Centre de recherches insulaires et observatoire de l'environnement (CRIOBE), Université de Perpignan Via Domitia (UPVD)-École pratique des hautes études (EPHE), and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)
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0106 biological sciences ,Multidisciplinary ,010504 meteorology & atmospheric sciences ,Ecology (disciplines) ,Biodiversity ,010603 evolutionary biology ,01 natural sciences ,Indigenous ,Geography ,Forge ,Sustainability ,[SDE]Environmental Sciences ,Environmental planning ,ComputingMilieux_MISCELLANEOUS ,0105 earth and related environmental sciences ,Global biodiversity - Abstract
To conserve global biodiversity, countries must forge equitable alliances that support sustainability in traditional pastoral lands, fisheries-management areas, Indigenous territories and more. To conserve global biodiversity, countries must forge equitable alliances that support sustainability in traditional pastoral lands, fisheries-management areas, Indigenous territories and more.
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78. Global drivers of mangrove loss in protected areas.
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Heck, Nadine, Goldberg, Liza, Andradi‐Brown, Dominic A., Campbell, Anthony, Narayan, Siddharth, Ahmadia, Gabby N., and Lagomasino, David
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Despite increasing efforts and investment in mangrove conservation, mangrove cover continues to decline globally. The extent to which protected area (PA) management effectively prevents mangrove loss globally across differing management objectives and governance types is not well understood. We combined remote sensing data with PA information to identify the extent and the drivers of mangrove loss across PAs with distinct governance types and protection levels based on categories developed by the International Union for Conservation of Nature (IUCN). Mangrove loss due to storms and erosion was prevalent across all governance types and most IUCN categories. However, the extent of human‐driven loss differed across governance types and IUCN categories. Loss was highest in national government PAs. Private, local, shared arrangement, and subnational government agencies had low human‐driven mangrove loss. Human‐driven loss was highest in PAs with the highest level of restrictions on human activities (IUCN category I) due to mangrove conversion to areas for commodity production (e.g., aquaculture), whereas PAs that allowed sustainable resource use (e.g., category VI) experienced low levels of human‐driven mangrove loss. Because category I PAs with high human‐driven loss were primarily governed by national government agencies, conservation outcomes in highly PAs might depend not only on the level of restrictions, but also on the governance type. Mangrove loss across different governance types and IUCN categories varied regionally. Specific governance types and IUCN categories thus seemed more effective in preventing mangrove loss in certain regions. Overall, we found that natural drivers contributed to global mangrove loss across all PAs, whereas human‐driven mangrove loss was lowest in PAs with subnational‐ to local‐level governance and PAs with few restrictions on human activities. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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79. The cost of enforcing a marine protected area to achieve ecological targets for the recovery of fish biomass.
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Brown, Christopher J., Parker, Brett, Ahmadia, Gabby N., Ardiwijaya, Rizya, Purwanto, and Game, Edward T.
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MARINE parks & reserves , *BIODIVERSITY conservation , *ECOLOGICAL impact , *FISCAL policy , *POACHING , *FISHERIES , *MANAGEMENT , *ECONOMICS - Abstract
Abstract Protected areas are the primary management tool for conserving ecosystems, yet their intended outcomes may often be compromised by poaching. Consequently, many protected areas are ineffective 'paper parks' that contribute little towards conserving ecosystems. Poaching can be prevented through enforcement and engaging with community members so they support protected areas. It is not clear how much needs to be spent on enforcement and engagement to ensure they are frequent enough to be effective at conserving biodiversity. We develop models of enforcement against illegal fishing in marine protected areas. We apply the models to data on fishing rates and fish biomass from a marine protected area in Raja Ampat, Indonesia and explore how frequent enforcement patrols need to be to achieve targets for coral reef fish biomass. Achieving pristine levels of reef fish biomass required almost year-round enforcement of the protected area. Surveillance of the protected area may also be enhanced if local fishers who support the reserve report on poaching. The opportunity for local fishing boats to participate in surveillance was too small for it to have much benefit for total reef fish biomass, which increases slowly. However, specific functional groups of fish have much higher population growth rates and their biomass was predicted to increase markedly with community surveillance. We conclude that budgets for park management must balance the cost of conducting frequent patrols against supporting alternative activities, like education to build community support. Optimized budgets will be much more likely to achieve ecological targets for recovering fish biomasses and will contribute to fiscal sustainability of protected areas. [ABSTRACT FROM AUTHOR]
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- 2018
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80. Generating actionable data for evidence-based conservation: The global center of marine biodiversity as a case study.
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Fox, Helen E., Barnes, Megan D., Ahmadia, Gabby N., Kao, Grace, Glew, Louise, Haisfield, Kelly, Hidayat, Nur Ismu, Huffard, Christine L., Katz, Laure, Mangubhai, Sangeeta, and Purwanto, null
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MARINE biodiversity conservation , *DECISION making in environmental policy , *SCIENTIFIC communication , *MARINE parks & reserves , *SUSTAINABILITY - Abstract
Sufficiently rigorous monitoring and evaluation can assess the effectiveness of management actions to conserve natural resources. However, costs of monitoring can be high in relation to program budgets, so it is critical to design monitoring efforts to ensure a high return on investment. To assess the relative contribution of different monitoring strategies to yield information for management decisions, we examine the evolution of a multi-year monitoring program across several MPAs in West Papua, Indonesia. Three monitoring strategies were implemented: external expert, science practitioner, and community monitoring staff. We place the monitoring objectives in a decision science framework, with six explicit fundamental objectives for monitoring to evaluate performance of marine protected areas. We examine each strategy in light of the six objectives to evaluate: 1) power to detect change, 2) extent of local capacity development, and 3) cost effectiveness. Over time, costs were reduced and scientific value increased through clear communication of science objectives, outcome-driven experimental design, adequately resourced monitoring programs, and a long-term view that anticipates phasing out outside consultants and transitioning monitoring responsibilities fully to locally-based staff. Investments to develop capacity of staff living locally to perform data management, analysis, interpretation, and science communication proved the most cost-effective approach in the long-term. With many globally important ecosystems in developing countries, developing local scientific capacity for the full cycle of monitoring is key to informed decision-making and ensuring long-term sustainability of efforts to conserve biodiversity. [ABSTRACT FROM AUTHOR]
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- 2017
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81. Chapter 4. Value expression in decision-making
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Barton, David N., Chaplin-Kramer, Rebecca, Lazos Chavero, Elena, Van Noordwijk, Meine, Engel, Stefanie, Girvan, Alexander, Hahn, Thomas, Leimona, Beria, Lele, Sharachchandra, Muradian, Roldan, Niamir, Aidin, Özkaynak, Begüm, Pawlowska-Mainville, Agnieszka, Ungar, Paula, Nelson, Sara, Aydin, Cem Iskender, Iranah, Pricila, Cantú-Fernández, Mariana, González-Jiménez, David, Bravo-Monroy, Liliana, Andradi-Brown, Dominic A., Ahmadia, Gabby N., Andrianarimisa, Aristide, Asiyanbi, Adeniyi, Aslan, Beste Gün, Asquith, Nigel, Avci, Duygu, Aydemir, Ezelnur, Aydın, Begüm, Baird, Timothy D., Berenguer, Maria Eduarda, Borgerson, Cortni, Bremer, Leah, Cadiz, Emily, Cassidy, Lin, Crane, Nicole, Dadvar, Maral, De Nardo, Matheus, del Bene, Daniela, Delgoulet, Elise, Demongeot, Marilou, Dugrillon, Cloé, Echavarria, Marta, Edens, Bram, Eyter, Harold N., Ortiz-Riomalo, Juan Felipe, Fidler, Robert Y., Forbes, Hamish, Gerçek, Pinar, Gill, David A., Guimaraes, Ellen, Harris, Maureen, Hayashi, Takashi, He, Jun, Isciel, Emine, Isyaku, Usman, Izquierdo- Tort, Santiago, Jackson, Sue, Jayant, Dheeraj, Katz, Laure, Kumagai, Joy, Kenter, Jasper, Keske, Fabian, Kozmínová, Michaela, Kruse, Marion, Kurashima, Natalie, Lansing, David, Laurans, Yann, Lavaud, Sophie, Lecercle, Hortense, Lliso, Bosco, Llopis, Jorge, Marttunen, Mika, Mascia, Michael B., McCabe, J. Terrence, Millington, Alice, Monroy- Sais, Sofia, Moore, Deborah, Morales Lizarazo, Diana Paola, Mosquera-Palacios, Maryury, Neugarten, Rachel, Obst, Carl, Ouyang, Zhiyun, Ozdemiroglu, Ece, Pakiding, Fitry, Perozzi, Mariana, Ríos-Beltrán, Fernanda, Rives, Justine, Roa-Avendaño, Tatiana, Rode, Julian, Roy, Brototi, Rulmal, John, Sahu, Geetanjoy, Saunders, Fred, Scholte, Samantha, Shapiro-Garza, Elizabeth, Shrestha, Sushma, Sotelo, Laura, Springer, Hannah Kihalani, Termansen, Mette, Thomas, Fabian, Tinch, Rob, Turpie, Jane, Upton, Caroline, Vaughan, Mehana, Veverka, Laura, Waechter, Anouck, Wann, Lei, Winter, Kawika, Wongbusarakum, Supin, Woodhouse, Emily, Zent, Eglee, Cárdenas, Juan Camilo, Baker, Susan, Krause, Marion, and Öztürk, Öykü
- Subjects
Value expression ,IPBES ,Values assessment ,Chapter 4 ,Decision making - Abstract
These documents correspond to Chapter 4 of the IPBES methodological assessment of the diverse values and valuation of nature and its supplementary material., Suggested citation: Barton, D.N., Chaplin-Kramer, R., Lazos, E., Van Noordwijk, M., Engel, S., Girvan, A., Hahn, T., Leimona, B., Lele, S., Niamir, A., Özkaynak, B., Pawlowska-Mainville, A., Muradian, R., Ungar, P., Aydin, C., Iranah, P., Nelson, S., Cantú-Fernández M., and González-Jiménez, D. (2022). Chapter 4: Value expression in decision-making. In: Methodological Assessment Report on the Diverse Values and Valuation of Nature of the Intergovernmental Science-Policy Platform on Biodiversity and Ecosystem Services. Balvanera, P., Pascual, U., Christie, M., Baptiste, B., and González-Jiménez, D. (eds). IPBES secretariat, Bonn, Germany. https://doi.org/10.5281/zenodo.6522261
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- 2022
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82. Introducing Elinor for monitoring the governance and management of area-based conservation.
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Mahajan SL, Obiene S, Ojwang L, Olwero N, Valdivia A, Wosu A, Adrid E, Andradi-Brown DA, Andriamalala G, Ban NC, Bennett NJ, Blythe J, Cheng SH, Darling E, De Nardo M, Drury O'Neill E, Epstein G, Fidler RY, Fisher K, Geldmann J, Gill DA, Kroner RG, Gurney G, Jagadish A, Jonas HD, Lazuardi ME, Petersen S, Ranarivelo VV, Rasoloformanana L, Rasolozaka TM, Read DJ, Mwaiteleke ES, and Ahmadia G
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- Decision Making, Biodiversity, Data Collection, Conservation of Natural Resources methods, Environmental Policy
- Abstract
Monitoring the governance and management effectiveness of area-based conservation has long been recognized as an important foundation for achieving national and global biodiversity goals and enabling adaptive management. However, there are still many barriers that prevent conservation actors, including those affected by governance and management systems from implementing conservation activities and programs and from gathering and using data on governance and management to inform decision-making across spatial scales and through time. We explored current and past efforts to assess governance and management effectiveness and barriers actors face in using the resulting data and insights to inform conservation decision-making. To help overcome these barriers, we developed Elinor, a free and open-source monitoring tool that builds on the work of Nobel Prize winner Elinor Ostrom to facilitate the gathering, storing, sharing, analyzing, and use of data on environmental governance and management across spatial scales and for areas under different governance and management types. We consider the process of codesigning and piloting Elinor with conservation scientists and practitioners and the main components of the assessment and online data system. We also consider how Elinor complements existing approaches by addressing governance and management in a single assessment at a high level for different types of area-based conservation, providing flexible options for data collection, and integrating a data system with an assessment that can support data use and sharing across different spatial scales, including global monitoring of the Global Biodiversity Framework. Although challenges will continue, the process of developing Elinor and the tool itself offer tangible solutions to barriers that prevent the systematic collection and use of governance and management data. With broader uptake, Elinor can play a valuable role in enabling more effective, inclusive, and durable area-based conservation., (© 2023 World Wildlife Fund, Inc. Conservation Biology published by Wiley Periodicals LLC on behalf of Society for Conservation Biology.)
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- 2024
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83. A diverse portfolio of marine protected areas can better advance global conservation and equity.
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Gill DA, Lester SE, Free CM, Pfaff A, Iversen E, Reich BJ, Yang S, Ahmadia G, Andradi-Brown DA, Darling ES, Edgar GJ, Fox HE, Geldmann J, Trung Le D, Mascia MB, Mesa-Gutiérrez R, Mumby PJ, Veverka L, and Warmuth LM
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- Animals, Humans, Biomass, Fishes, Ecosystem, Conservation of Natural Resources, Fisheries
- Abstract
Marine protected areas (MPAs) are widely used for ocean conservation, yet the relative impacts of various types of MPAs are poorly understood. We estimated impacts on fish biomass from no-take and multiple-use (fished) MPAs, employing a rigorous matched counterfactual design with a global dataset of >14,000 surveys in and around 216 MPAs. Both no-take and multiple-use MPAs generated positive conservation outcomes relative to no protection (58.2% and 12.6% fish biomass increases, respectively), with smaller estimated differences between the two MPA types when controlling for additional confounding factors (8.3% increase). Relative performance depended on context and management: no-take MPAs performed better in areas of high human pressure but similar to multiple-use in remote locations. Multiple-use MPA performance was low in high-pressure areas but improved significantly with better management, producing similar outcomes to no-take MPAs when adequately staffed and appropriate use regulations were applied. For priority conservation areas where no-take restrictions are not possible or ethical, our findings show that a portfolio of well-designed and well-managed multiple-use MPAs represents a viable and potentially equitable pathway to advance local and global conservation., Competing Interests: Competing interests statement:The authors declare no competing interest.
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- 2024
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84. Integrating impact evaluation in the design and implementation of monitoring marine protected areas.
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Ahmadia GN, Glew L, Provost M, Gill D, Hidayat NI, Mangubhai S, Purwanto, and Fox HE
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- Animals, Biodiversity, Ecosystem, Indonesia, Marine Biology, Conservation of Natural Resources methods, Environmental Monitoring methods
- Abstract
Quasi-experimental impact evaluation approaches, which enable scholars to disentangle effects of conservation interventions from broader changes in the environment, are gaining momentum in the conservation sector. However, rigorous impact evaluation using statistical matching techniques to estimate the counterfactual have yet to be applied to marine protected areas (MPAs). While there are numerous studies investigating 'impacts' of MPAs that have generated considerable insights, results are variable. This variation has been linked to the biophysical and social context in which they are established, as well as attributes of management and governance. To inform decisions about MPA placement, design and implementation, we need to expand our understanding of conditions under which MPAs are likely to lead to positive outcomes by embracing advances in impact evaluation methodologies. Here, we describe the integration of impact evaluation within an MPA network monitoring programme in the Bird's Head Seascape, Indonesia. Specifically we (i) highlight the challenges of implementation 'on the ground' and in marine ecosystems and (ii) describe the transformation of an existing monitoring programme into a design appropriate for impact evaluation. This study offers one potential model for mainstreaming impact evaluation in the conservation sector., (© 2015 The Author(s).)
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- 2015
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