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1. Dominance and rarity in tree communities across the globe: Patterns, predictors and threats

Author

Hordijk, Iris, Bialic‐Murphy, Lalasia, Lauber, Thomas, Routh, Devin, Poorter, Lourens, Rivers, Malin C, Steege, Hans ter, Liang, Jingjing, Reich, Peter B, de‐Miguel, Sergio, Nabuurs, Gert‐Jan, Gamarra, Javier GP, Chen, Han YH, Zhou, Mo, Wiser, Susan K, Pretzsch, Hans, Paquette, Alain, Picard, Nicolas, Hérault, Bruno, Bastin, Jean‐Francois, Alberti, Giorgio, Abegg, Meinrad, Yao, Yves C Adou, Zambrano, Angelica M Almeyda, Alvarado, Braulio V, Alvarez‐Davila, Esteban, Alvarez‐Loayza, Patricia, Alves, Luciana F, Ammer, Christian, Antón‐Fernández, Clara, Araujo‐Murakami, Alejandro, Arroyo, Luzmila, Avitabile, Valerio, Corredor, Gerardo A Aymard, Baker, Timothy, Banki, Olaf, Barroso, Jorcely, Bastian, Meredith L, Birigazzi, Luca, Birnbaum, Philippe, Bitariho, Robert, Boeckx, Pascal, Bongers, Frans, Bouriaud, Olivier, Brancalion, Pedro HS, Brandl, Susanne, Brienen, Roel, Broadbent, Eben N, Bruelheide, Helge, Bussotti, Filippo, Gatti, Roberto Cazzolla, Cesar, Ricardo G, Cesljar, Goran, Chazdon, Robin, Chisholm, Chelsea, Cienciala, Emil, Clark, Connie J, Clar, David B, Colletta, Gabriel, Coomes, David, Valverde, Fernando Cornejo, Corral‐Rivas, Jose J, Crim, Philip, Cumming, Jonathan, Dayanandan, Selvadurai, de Gasper, André L, Decuyper, Mathieu, Derroire, Géraldine, DeVries, Ben, Djordjevic, Ilija, Iêda, Amaral, Dourdain, Aurélie, Dolezal, Jiri, Obiang, Nestor Laurier Engone, Enquist, Brian, Eyre, Teresa, Fandohan, Adandé Belarmain, Fayle, Tom M, Ferreira, Leandro V, Feldpausch, Ted R, Finér, Leena, Fischer, Markus, Fletcher, Christine, Frizzera, Lorenzo, Gianelle, Damiano, Glick, Henry B, Harris, David, Hector, Andrew, Hemp, Andreas, Hengeveld, Geerten, Herbohn, John, Hillers, Annika, Coronado, Eurídice N Honorio, Hui, Cang, Cho, Hyunkook, Ibanez, Thomas, Jung, Ilbin, Imai, Nobuo, Jagodzinski, Andrzej M, and Jaroszewicz, Bogdan

Subjects
Environmental Sciences, Ecological Applications, Ecology, Biological Sciences, Machine Learning and Artificial Intelligence, Life on Land, Life Below Water
Abstract

Aim: Ecological and anthropogenic factors shift the abundances of dominant and rare tree species within local forest communities, thus affecting species composition and ecosystem functioning. To inform forest and conservation management it is important to understand the drivers of dominance and rarity in local tree communities. We answer the following research questions: (1) What are the patterns of dominance and rarity in tree communities? (2) Which ecological and anthropogenic factors predict these patterns? And (3) what is the extinction risk of locally dominant and rare tree species?. Location: Global. Time period: 1990–2017. Major taxa studied: Trees. Methods: We used 1.2 million forest plots and quantified local tree dominance as the relative plot basal area of the single most dominant species and local rarity as the percentage of species that contribute together to the least 10% of plot basal area. We mapped global community dominance and rarity using machine learning models and evaluated the ecological and anthropogenic predictors with linear models. Extinction risk, for example threatened status, of geographically widespread dominant and rare species was evaluated. Results: Community dominance and rarity show contrasting latitudinal trends, with boreal forests having high levels of dominance and tropical forests having high levels of rarity. Increasing annual precipitation reduces community dominance, probably because precipitation is related to an increase in tree density and richness. Additionally, stand age is positively related to community dominance, due to stem diameter increase of the most dominant species. Surprisingly, we find that locally dominant and rare species, which are geographically widespread in our data, have an equally high rate of elevated extinction due to declining populations through large-scale land degradation. Main conclusions: By linking patterns and predictors of community dominance and rarity to extinction risk, our results suggest that also widespread species should be considered in large-scale management and conservation practices.

Published
2024

2. Integrated global assessment of the natural forest carbon potential

Author

Mo, Lidong, Zohner, Constantin M, Reich, Peter B, Liang, Jingjing, de Miguel, Sergio, Nabuurs, Gert-Jan, Renner, Susanne S, van den Hoogen, Johan, Araza, Arnan, Herold, Martin, Mirzagholi, Leila, Ma, Haozhi, Averill, Colin, Phillips, Oliver L, Gamarra, Javier GP, Hordijk, Iris, Routh, Devin, Abegg, Meinrad, Adou Yao, Yves C, Alberti, Giorgio, Almeyda Zambrano, Angelica M, Alvarado, Braulio Vilchez, Alvarez-Dávila, Esteban, Alvarez-Loayza, Patricia, Alves, Luciana F, Amaral, Iêda, Ammer, Christian, Antón-Fernández, Clara, Araujo-Murakami, Alejandro, Arroyo, Luzmila, Avitabile, Valerio, Aymard, Gerardo A, Baker, Timothy R, Bałazy, Radomir, Banki, Olaf, Barroso, Jorcely G, Bastian, Meredith L, Bastin, Jean-Francois, Birigazzi, Luca, Birnbaum, Philippe, Bitariho, Robert, Boeckx, Pascal, Bongers, Frans, Bouriaud, Olivier, Brancalion, Pedro HS, Brandl, Susanne, Brearley, Francis Q, Brienen, Roel, Broadbent, Eben N, Bruelheide, Helge, Bussotti, Filippo, Cazzolla Gatti, Roberto, César, Ricardo G, Cesljar, Goran, Chazdon, Robin L, Chen, Han YH, Chisholm, Chelsea, Cho, Hyunkook, Cienciala, Emil, Clark, Connie, Clark, David, Colletta, Gabriel D, Coomes, David A, Cornejo Valverde, Fernando, Corral-Rivas, José J, Crim, Philip M, Cumming, Jonathan R, Dayanandan, Selvadurai, de Gasper, André L, Decuyper, Mathieu, Derroire, Géraldine, DeVries, Ben, Djordjevic, Ilija, Dolezal, Jiri, Dourdain, Aurélie, Engone Obiang, Nestor Laurier, Enquist, Brian J, Eyre, Teresa J, Fandohan, Adandé Belarmain, Fayle, Tom M, Feldpausch, Ted R, Ferreira, Leandro V, Finér, Leena, Fischer, Markus, Fletcher, Christine, Frizzera, Lorenzo, Gianelle, Damiano, Glick, Henry B, Harris, David J, Hector, Andrew, Hemp, Andreas, Hengeveld, Geerten, Hérault, Bruno, Herbohn, John L, Hillers, Annika, Honorio Coronado, Eurídice N, Hui, Cang, Ibanez, Thomas, Imai, Nobuo, and Jagodziński, Andrzej M

Subjects
Agricultural, Veterinary and Food Sciences, Ecological Applications, Environmental Sciences, Forestry Sciences, Life on Land, Biodiversity, Carbon, Carbon Sequestration, Conservation of Natural Resources, Forests, Human Activities, Environmental Restoration and Remediation, Sustainable Development, Global Warming, Agricultural, Ecosystem, General Science & Technology, Humans, Veterinary and Food Sciences
Abstract

Forests are a substantial terrestrial carbon sink, but anthropogenic changes in land use and climate have considerably reduced the scale of this system1. Remote-sensing estimates to quantify carbon losses from global forests2-5 are characterized by considerable uncertainty and we lack a comprehensive ground-sourced evaluation to benchmark these estimates. Here we combine several ground-sourced6 and satellite-derived approaches2,7,8 to evaluate the scale of the global forest carbon potential outside agricultural and urban lands. Despite regional variation, the predictions demonstrated remarkable consistency at a global scale, with only a 12% difference between the ground-sourced and satellite-derived estimates. At present, global forest carbon storage is markedly under the natural potential, with a total deficit of 226 Gt (model range = 151-363 Gt) in areas with low human footprint. Most (61%, 139 Gt C) of this potential is in areas with existing forests, in which ecosystem protection can allow forests to recover to maturity. The remaining 39% (87 Gt C) of potential lies in regions in which forests have been removed or fragmented. Although forests cannot be a substitute for emissions reductions, our results support the idea2,3,9 that the conservation, restoration and sustainable management of diverse forests offer valuable contributions to meeting global climate and biodiversity targets.

Published
2023

3. Muscle matters: Skeletal muscle index and body mass index impact on complications and survival in renal cancer

Author

Alexander Hintze Hillers, Signe Wang Bach, Atena Saito, and Nessn Azawi

Subjects
body mass index (BMI), overall survival, postoperative complications, renal cell carcinoma, skeletal muscle index (SMI), Diseases of the genitourinary system. Urology, RC870-923
Abstract

Abstract Objective The objective of this study is to independently assess skeletal muscle index (SMI) and body mass index (BMI) as prognostic determinants for renal cell carcinoma (RCC) and investigate their correlation with surgical outcomes. Patients and methods A retrospective cohort study of 524 RCC patients diagnosed between August 2010 and July 2018 was conducted using data from the Zealand University Hospital Renal Cancer Database in Denmark. Patient information was extracted from electronic patient records and the National Cancer Registry and encompassed demographics, clinical factors, tumour characteristics and surgical details. SMI was calculated from a single third lumbar vertebra (L3) axial computed tomography (CT) image via CoreSlicer software and classified into high using gender‐specific thresholds. Primary outcomes focused on complications within 90 days as well as survival outcomes, and their relation with both SMI and BMI. Multivariable analysis assessed SMI's independent prognostic significance in RCC. Results Among 524 patients, 18.5% experienced complications, with high SMI correlating significantly (p = 0.018) with a 72% higher complication risk. High SMI patients had a 22.7% complication rate compared to 14.5% in the low SMI group. High SMI was also linked to prolonged survival (110.95 vs. 94.87 months; p = 0.001), whereas BMI showed no significant survival differences (p = 0.326). Multivariable analysis (n = 522) revealed high SMI associated with improved survival (hazard ratio [HR] = 0.738; 95% CI, 0.548–0.994; p = 0.046). Advanced T‐stage significantly impacted mortality (T2: HR = 2.057; T3: HR = 4.361; p

Published
2024
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4. The global biogeography of tree leaf form and habit

Author

Ma, Haozhi, Crowther, Thomas W, Mo, Lidong, Maynard, Daniel S, Renner, Susanne S, van den Hoogen, Johan, Zou, Yibiao, Liang, Jingjing, de-Miguel, Sergio, Nabuurs, Gert-Jan, Reich, Peter B, Niinemets, Ülo, Abegg, Meinrad, Adou Yao, Yves C, Alberti, Giorgio, Almeyda Zambrano, Angelica M, Alvarado, Braulio Vilchez, Alvarez-Dávila, Esteban, Alvarez-Loayza, Patricia, Alves, Luciana F, Ammer, Christian, Antón-Fernández, Clara, Araujo-Murakami, Alejandro, Arroyo, Luzmila, Avitabile, Valerio, Aymard, Gerardo A, Baker, Timothy R, Bałazy, Radomir, Banki, Olaf, Barroso, Jorcely G, Bastian, Meredith L, Bastin, Jean-Francois, Birigazzi, Luca, Birnbaum, Philippe, Bitariho, Robert, Boeckx, Pascal, Bongers, Frans, Bouriaud, Olivier, Brancalion, Pedro HS, Brandl, Susanne, Brearley, Francis Q, Brienen, Roel, Broadbent, Eben N, Bruelheide, Helge, Bussotti, Filippo, Cazzolla Gatti, Roberto, César, Ricardo G, Cesljar, Goran, Chazdon, Robin, Chen, Han YH, Chisholm, Chelsea, Cho, Hyunkook, Cienciala, Emil, Clark, Connie, Clark, David, Colletta, Gabriel D, Coomes, David A, Valverde, Fernando Cornejo, Corral-Rivas, José J, Crim, Philip M, Cumming, Jonathan R, Dayanandan, Selvadurai, de Gasper, André L, Decuyper, Mathieu, Derroire, Géraldine, DeVries, Ben, Djordjevic, Ilija, Dolezal, Jiri, Dourdain, Aurélie, Engone Obiang, Nestor Laurier, Enquist, Brian J, Eyre, Teresa J, Fandohan, Adandé Belarmain, Fayle, Tom M, Feldpausch, Ted R, Ferreira, Leandro V, Finér, Leena, Fischer, Markus, Fletcher, Christine, Fridman, Jonas, Frizzera, Lorenzo, Gamarra, Javier GP, Gianelle, Damiano, Glick, Henry B, Harris, David J, Hector, Andrew, Hemp, Andreas, Hengeveld, Geerten, Hérault, Bruno, Herbohn, John L, Herold, Martin, Hillers, Annika, Honorio Coronado, Eurídice N, Hui, Cang, Ibanez, Thomas T, Amaral, Iêda, Imai, Nobuo, Jagodziński, Andrzej M, Jaroszewicz, Bogdan, and Johannsen, Vivian Kvist

Subjects
Biological Sciences, Ecology, Climate Action, Plant Biology, Crop and Pasture Production, Plant biology
Abstract

Understanding what controls global leaf type variation in trees is crucial for comprehending their role in terrestrial ecosystems, including carbon, water and nutrient dynamics. Yet our understanding of the factors influencing forest leaf types remains incomplete, leaving us uncertain about the global proportions of needle-leaved, broadleaved, evergreen and deciduous trees. To address these gaps, we conducted a global, ground-sourced assessment of forest leaf-type variation by integrating forest inventory data with comprehensive leaf form (broadleaf vs needle-leaf) and habit (evergreen vs deciduous) records. We found that global variation in leaf habit is primarily driven by isothermality and soil characteristics, while leaf form is predominantly driven by temperature. Given these relationships, we estimate that 38% of global tree individuals are needle-leaved evergreen, 29% are broadleaved evergreen, 27% are broadleaved deciduous and 5% are needle-leaved deciduous. The aboveground biomass distribution among these tree types is approximately 21% (126.4 Gt), 54% (335.7 Gt), 22% (136.2 Gt) and 3% (18.7 Gt), respectively. We further project that, depending on future emissions pathways, 17-34% of forested areas will experience climate conditions by the end of the century that currently support a different forest type, highlighting the intensification of climatic stress on existing forests. By quantifying the distribution of tree leaf types and their corresponding biomass, and identifying regions where climate change will exert greatest pressure on current leaf types, our results can help improve predictions of future terrestrial ecosystem functioning and carbon cycling.

Published
2023

5. Author Correction: Native diversity buffers against severity of non-native tree invasions

Author

Delavaux, Camille S, Crowther, Thomas W, Zohner, Constantin M, Robmann, Niamh M, Lauber, Thomas, van den Hoogen, Johan, Kuebbing, Sara, Liang, Jingjing, de-Miguel, Sergio, Nabuurs, Gert-Jan, Reich, Peter B, Abegg, Meinrad, Adou Yao, Yves C, Alberti, Giorgio, Almeyda Zambrano, Angelica M, Alvarado, Braulio Vilchez, Alvarez-Dávila, Esteban, Alvarez-Loayza, Patricia, Alves, Luciana F, Ammer, Christian, Antón-Fernández, Clara, Araujo-Murakami, Alejandro, Arroyo, Luzmila, Avitabile, Valerio, Aymard, Gerardo A, Baker, Timothy R, Bałazy, Radomir, Banki, Olaf, Barroso, Jorcely G, Bastian, Meredith L, Bastin, Jean-Francois, Birigazzi, Luca, Birnbaum, Philippe, Bitariho, Robert, Boeckx, Pascal, Bongers, Frans, Bouriaud, Olivier, Brancalion, Pedro HS, Brandl, Susanne, Brienen, Roel, Broadbent, Eben N, Bruelheide, Helge, Bussotti, Filippo, Gatti, Roberto Cazzolla, César, Ricardo G, Cesljar, Goran, Chazdon, Robin, Chen, Han YH, Chisholm, Chelsea, Cho, Hyunkook, Cienciala, Emil, Clark, Connie, Clark, David, Colletta, Gabriel D, Coomes, David A, Cornejo Valverde, Fernando, Corral-Rivas, José J, Crim, Philip M, Cumming, Jonathan R, Dayanandan, Selvadurai, de Gasper, André L, Decuyper, Mathieu, Derroire, Géraldine, DeVries, Ben, Djordjevic, Ilija, Dolezal, Jiri, Dourdain, Aurélie, Engone Obiang, Nestor Laurier, Enquist, Brian J, Eyre, Teresa J, Fandohan, Adandé Belarmain, Fayle, Tom M, Feldpausch, Ted R, Ferreira, Leandro V, Fischer, Markus, Fletcher, Christine, Frizzera, Lorenzo, Gamarra, Javier GP, Gianelle, Damiano, Glick, Henry B, Harris, David J, Hector, Andrew, Hemp, Andreas, Hengeveld, Geerten, Hérault, Bruno, Herbohn, John L, Herold, Martin, Hillers, Annika, Honorio Coronado, Eurídice N, Hui, Cang, Ibanez, Thomas T, Amaral, Iêda, Imai, Nobuo, Jagodziński, Andrzej M, Jaroszewicz, Bogdan, Johannsen, Vivian Kvist, Joly, Carlos A, Jucker, Tommaso, Jung, Ilbin, and Karminov, Viktor

Subjects
General Science & Technology
Published
2023

6. Native diversity buffers against severity of non-native tree invasions.

Author

Delavaux, Camille S, Crowther, Thomas W, Zohner, Constantin M, Robmann, Niamh M, Lauber, Thomas, van den Hoogen, Johan, Kuebbing, Sara, Liang, Jingjing, de-Miguel, Sergio, Nabuurs, Gert-Jan, Reich, Peter B, Abegg, Meinrad, Adou Yao, Yves C, Alberti, Giorgio, Almeyda Zambrano, Angelica M, Alvarado, Braulio Vilchez, Alvarez-Dávila, Esteban, Alvarez-Loayza, Patricia, Alves, Luciana F, Ammer, Christian, Antón-Fernández, Clara, Araujo-Murakami, Alejandro, Arroyo, Luzmila, Avitabile, Valerio, Aymard, Gerardo A, Baker, Timothy R, Bałazy, Radomir, Banki, Olaf, Barroso, Jorcely G, Bastian, Meredith L, Bastin, Jean-Francois, Birigazzi, Luca, Birnbaum, Philippe, Bitariho, Robert, Boeckx, Pascal, Bongers, Frans, Bouriaud, Olivier, Brancalion, Pedro HS, Brandl, Susanne, Brienen, Roel, Broadbent, Eben N, Bruelheide, Helge, Bussotti, Filippo, Gatti, Roberto Cazzolla, César, Ricardo G, Cesljar, Goran, Chazdon, Robin, Chen, Han YH, Chisholm, Chelsea, Cho, Hyunkook, Cienciala, Emil, Clark, Connie, Clark, David, Colletta, Gabriel D, Coomes, David A, Cornejo Valverde, Fernando, Corral-Rivas, José J, Crim, Philip M, Cumming, Jonathan R, Dayanandan, Selvadurai, de Gasper, André L, Decuyper, Mathieu, Derroire, Géraldine, DeVries, Ben, Djordjevic, Ilija, Dolezal, Jiri, Dourdain, Aurélie, Engone Obiang, Nestor Laurier, Enquist, Brian J, Eyre, Teresa J, Fandohan, Adandé Belarmain, Fayle, Tom M, Feldpausch, Ted R, Ferreira, Leandro V, Fischer, Markus, Fletcher, Christine, Frizzera, Lorenzo, Gamarra, Javier GP, Gianelle, Damiano, Glick, Henry B, Harris, David J, Hector, Andrew, Hemp, Andreas, Hengeveld, Geerten, Hérault, Bruno, Herbohn, John L, Herold, Martin, Hillers, Annika, Honorio Coronado, Eurídice N, Hui, Cang, Ibanez, Thomas T, Amaral, Iêda, Imai, Nobuo, Jagodziński, Andrzej M, Jaroszewicz, Bogdan, Johannsen, Vivian Kvist, Joly, Carlos A, Jucker, Tommaso, Jung, Ilbin, and Karminov, Viktor

Subjects
General Science & Technology
Abstract

Determining the drivers of non-native plant invasions is critical for managing native ecosystems and limiting the spread of invasive species1,2. Tree invasions in particular have been relatively overlooked, even though they have the potential to transform ecosystems and economies3,4. Here, leveraging global tree databases5-7, we explore how the phylogenetic and functional diversity of native tree communities, human pressure and the environment influence the establishment of non-native tree species and the subsequent invasion severity. We find that anthropogenic factors are key to predicting whether a location is invaded, but that invasion severity is underpinned by native diversity, with higher diversity predicting lower invasion severity. Temperature and precipitation emerge as strong predictors of invasion strategy, with non-native species invading successfully when they are similar to the native community in cold or dry extremes. Yet, despite the influence of these ecological forces in determining invasion strategy, we find evidence that these patterns can be obscured by human activity, with lower ecological signal in areas with higher proximity to shipping ports. Our global perspective of non-native tree invasion highlights that human drivers influence non-native tree presence, and that native phylogenetic and functional diversity have a critical role in the establishment and spread of subsequent invasions.

Published
2023

7. Evenness mediates the global relationship between forest productivity and richness

Author

Hordijk, Iris, Maynard, Daniel S, Hart, Simon P, Lidong, Mo, ter Steege, Hans, Liang, Jingjing, de‐Miguel, Sergio, Nabuurs, Gert‐Jan, Reich, Peter B, Abegg, Meinrad, Adou Yao, C Yves, Alberti, Giorgio, Almeyda Zambrano, Angelica M, Alvarado, Braulio V, Esteban, Alvarez‐Davila, Alvarez‐Loayza, Patricia, Alves, Luciana F, Ammer, Christian, Antón‐Fernández, Clara, Araujo‐Murakami, Alejandro, Arroyo, Luzmila, Avitabile, Valerio, Aymard C, Gerardo A, Baker, Timothy, Bałazy, Radomir, Banki, Olaf, Barroso, Jorcely, Bastian, Meredith L, Bastin, Jean‐Francois, Birigazzi, Luca, Birnbaum, Philippe, Bitariho, Robert, Boeckx, Pascal, Bongers, Frans, Bouriaud, Olivier, Brancalion, Pedro HS, Brandl, Susanne, Brienen, Roel, Broadbent, Eben N, Bruelheide, Helge, Bussotti, Filippo, Cazzolla Gatti, Roberto, César, Ricardo G, Cesljar, Goran, Chazdon, Robin, Chen, Han YH, Chisholm, Chelsea, Cienciala, Emil, Clark, Connie J, Clark, David B, Colletta, Gabriel, Coomes, David, Cornejo Valverde, Fernando, Corral‐Rivas, Jose J, Crim, Philip, Cumming, Jonathan, Dayanandan, Selvadurai, de Gasper, André L, Decuyper, Mathieu, Derroire, Géraldine, DeVries, Ben, Djordjevic, Ilija, Iêda, Amaral, Dourdain, Aurélie, Nestor Laurier, Engone Obiang, Enquist, Brian, Eyre, Teresa, Fandohan, Adandé Belarmain, Fayle, Tom M, Ferreira, Leandro V, Feldpausch, Ted R, Finér, Leena, Fischer, Markus, Fletcher, Christine, Frizzera, Lorenzo, Gamarra, Javier GP, Gianelle, Damiano, Glick, Henry B, Harris, David, Hector, Andrew, Hemp, Andreas, Hengeveld, Geerten, Hérault, Bruno, Herbohn, John, Hillers, Annika, Honorio Coronado, Eurídice N, Hui, Cang, Cho, Hyunkook, Ibanez, Thomas, Bin Jung, Il, Imai, Nobuo, Jagodzinski, Andrzej M, Jaroszewicz, Bogdan, Johanssen, Vivian, Joly, Carlos A, Jucker, Tommaso, Karminov, Viktor, Kartawinata, Kuswata, Kearsley, Elizabeth, and Kenfack, David

Subjects
Biological Sciences, Ecology, Life Below Water, diversity, ecosystem function and services, evenness, forests, global, productivity, species richness, Environmental Sciences, Agricultural and Veterinary Sciences
Abstract

1. Biodiversity is an important component of natural ecosystems, with higher species richness often correlating with an increase in ecosystem productivity. Yet, this relationship varies substantially across environments, typically becoming less pronounced at high levels of species richness. However, species richness alone cannot reflect all important properties of a community, including community evenness, which may mediate the relationship between biodiversity and productivity. If the evenness of a community correlates negatively with richness across forests globally, then a greater number of species may not always increase overall diversity and productivity of the system. Theoretical work and local empirical studies have shown that the effect of evenness on ecosystem functioning may be especially strong at high richness levels, yet the consistency of this remains untested at a global scale. 2. Here, we used a dataset of forests from across the globe, which includes composition, biomass accumulation and net primary productivity, to explore whether productivity correlates with community evenness and richness in a way that evenness appears to buffer the effect of richness. Specifically, we evaluated whether low levels of evenness in speciose communities correlate with the attenuation of the richness–productivity relationship. 3. We found that tree species richness and evenness are negatively correlated across forests globally, with highly speciose forests typically comprising a few dominant and many rare species. Furthermore, we found that the correlation between diversity and productivity changes with evenness: at low richness, uneven communities are more productive, while at high richness, even communities are more productive. 4. Synthesis. Collectively, these results demonstrate that evenness is an integral component of the relationship between biodiversity and productivity, and that the attenuating effect of richness on forest productivity might be partly explained by low evenness in speciose communities. Productivity generally increases with species richness, until reduced evenness limits the overall increases in community diversity. Our research suggests that evenness is a fundamental component of biodiversity–ecosystem function relationships, and is of critical importance for guiding conservation and sustainable ecosystem management decisions.

Published
2023

8. Numerical simulations of seismo-acoustic nuisance patterns from an induced M1.8 earthquake in the Helsinki, southern Finland, metropolitan area

Author

Krenz, Lukas, Wolf, Sebastian, Hillers, Gregor, Gabriel, Alice-Agnes, and Bader, Michael

Subjects
Physics - Geophysics, Physics - Computational Physics
Abstract

Seismic waves can couple with the atmosphere and generate sound waves. The influence of faulting mechanisms on earthquake sound patterns provides opportunities for earthquake source characterization. Sound radiated from earthquakes can be perceived as disturbing which can negatively impact the social acceptance of geoengineering applications. Motivated by reports of felt and heard disturbances associated with the week-long stimulation of a 6 km-deep geothermal system in 2018 below the Otaniemi district of Espoo, Helsinki, we conduct fully coupled 3D numerical simulations of wave propagation in the solid Earth and the atmosphere. We assess the sensitivity of the ground shaking and audible noise distributions to the source geometry of the induced earthquakes. Utilizing recent computational advances and the open-source software SeisSol, we model seismo-acoustic frequencies up to 25 Hz, thereby reaching the lower limit of the audible sound frequency range. We present synthetic distributions of shaking and audible and discuss implications for better understanding seismic nuisances in metropolitan regions. In five 3D coupled elastic-acoustic scenario, we analyze the ground velocity and pressure levels of earthquake-generated seismic and acoustic waves. We show that S waves generate the strongest sound disturbance with sound pressure levels of up to 0.04 Pa. We use statistical analysis to compare our noise distributions with commonly used empirical relationships. We find that our 3D synthetic amplitudes are generally smaller than the empirical predictions and that the interaction of the source-specific radiation pattern and topography can lead to significant non-linear effects. Our study highlights the complexity and information content of spatially variable audible effects associated with small induced earthquakes on local scales., Comment: 36 pages, 11 figures

Published
2022
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9. Induced earthquake source parameters, attenuation, and site effects from waveform envelopes in the Fennoscandian Shield

Author

Eulenfeld, Tom, Hillers, Gregor, Vuorinen, Tommi A. T., and Wegler, Ulrich

Subjects
Physics - Geophysics
Abstract

We analyze envelopes of 233 and 22 $M_{\text L}$0.0 to $M_{\text L}$1.8 earthquakes induced by two geothermal stimulations in the Helsinki, Finland, metropolitan area. We separate source spectra and site terms and determine intrinsic attenuation and the scattering strength of shear waves in the 3 Hz to 200 Hz frequency range using radiative transfer based synthetic envelopes. Displacement spectra yield scaling relations with a general deviation from self-similarity, with a stronger albeit more controversial signal from the weaker 2020 stimulation. The 2020 earthquakes also tend to have a smaller local magnitude compared to 2018 earthquakes with the same moment magnitude. We discuss these connections in the context of fluid effects on rupture speed or medium properties. Site terms demonstrate that the spectral amplification relative to two reference borehole sites is not neutral at the other sensors; largest variations are observed at surface stations at frequencies larger than 30 Hz. Intrinsic attenuation is exceptionally low with $Q_{\text i}^{-1}$ values down to $2.4\times 10^{-5}$ at 20 Hz, which allows the observation of a diffuse reflection at the ${\sim}$50 km deep Moho. Scattering strength is in the range of globally observed data with $Q_{\text{sc}}^{-1}$ between $10^{-3}$ and $10^{-4}$. The application of the employed Qopen analysis program to the 2020 data in a retrospective monitoring mode demonstrates its versatility as a seismicity processing tool. The diverse results have implications for scaling relations, hazard assessment and ground motion modeling, and imaging and monitoring using ballistic and scattered wavefields in the crystalline Fennoscandian Shield environment., Comment: published in JGR: Solid Earth, v2: published version

Published
2022
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10. Coupled cluster theory on modern heterogeneous supercomputers.

Author

Corzo, Hector, Hillers-Bendtsen, Andreas, Barnes, Ashleigh, Zamani, Abdulrahman, Pawłowski, Filip, Olsen, Jeppe, Jørgensen, Poul, Mikkelsen, Kurt, and Bykov, Dmytro

Subjects
cluster perturbation theory, coupled cluster theory, deoxyribonucleic acid, divide-expand-consolidate coupled cluster framework, excitation energies, tetrahydrocannabinol
Abstract

This study examines the computational challenges in elucidating intricate chemical systems, particularly through ab-initio methodologies. This work highlights the Divide-Expand-Consolidate (DEC) approach for coupled cluster (CC) theory-a linear-scaling, massively parallel framework-as a viable solution. Detailed scrutiny of the DEC framework reveals its extensive applicability for large chemical systems, yet it also acknowledges inherent limitations. To mitigate these constraints, the cluster perturbation theory is presented as an effective remedy. Attention is then directed towards the CPS (D-3) model, explicitly derived from a CC singles parent and a doubles auxiliary excitation space, for computing excitation energies. The reviewed new algorithms for the CPS (D-3) method efficiently capitalize on multiple nodes and graphical processing units, expediting heavy tensor contractions. As a result, CPS (D-3) emerges as a scalable, rapid, and precise solution for computing molecular properties in large molecular systems, marking it an efficient contender to conventional CC models.

Published
2023

12. Native diversity buffers against severity of non-native tree invasions

Author

Delavaux, Camille S., Crowther, Thomas W., Zohner, Constantin M., Robmann, Niamh M., Lauber, Thomas, van den Hoogen, Johan, Kuebbing, Sara, Liang, Jingjing, de-Miguel, Sergio, Nabuurs, Gert-Jan, Reich, Peter B., Abegg, Meinrad, Adou Yao, Yves C., Alberti, Giorgio, Almeyda Zambrano, Angelica M., Alvarado, Braulio Vilchez, Alvarez-Dávila, Esteban, Alvarez-Loayza, Patricia, Alves, Luciana F., Ammer, Christian, Antón-Fernández, Clara, Araujo-Murakami, Alejandro, Arroyo, Luzmila, Avitabile, Valerio, Aymard, Gerardo A., Baker, Timothy R., Bałazy, Radomir, Banki, Olaf, Barroso, Jorcely G., Bastian, Meredith L., Bastin, Jean-Francois, Birigazzi, Luca, Birnbaum, Philippe, Bitariho, Robert, Boeckx, Pascal, Bongers, Frans, Bouriaud, Olivier, Brancalion, Pedro H. S., Brandl, Susanne, Brienen, Roel, Broadbent, Eben N., Bruelheide, Helge, Bussotti, Filippo, Gatti, Roberto Cazzolla, César, Ricardo G., Cesljar, Goran, Chazdon, Robin, Chen, Han Y. H., Chisholm, Chelsea, Cho, Hyunkook, Cienciala, Emil, Clark, Connie, Clark, David, Colletta, Gabriel D., Coomes, David A., Cornejo Valverde, Fernando, Corral-Rivas, José J., Crim, Philip M., Cumming, Jonathan R., Dayanandan, Selvadurai, de Gasper, André L., Decuyper, Mathieu, Derroire, Géraldine, DeVries, Ben, Djordjevic, Ilija, Dolezal, Jiri, Dourdain, Aurélie, Engone Obiang, Nestor Laurier, Enquist, Brian J., Eyre, Teresa J., Fandohan, Adandé Belarmain, Fayle, Tom M., Feldpausch, Ted R., Ferreira, Leandro V., Fischer, Markus, Fletcher, Christine, Frizzera, Lorenzo, Gamarra, Javier G. P., Gianelle, Damiano, Glick, Henry B., Harris, David J., Hector, Andrew, Hemp, Andreas, Hengeveld, Geerten, Hérault, Bruno, Herbohn, John L., Herold, Martin, Hillers, Annika, Honorio Coronado, Eurídice N., Hui, Cang, Ibanez, Thomas T., Amaral, Iêda, Imai, Nobuo, Jagodziński, Andrzej M., Jaroszewicz, Bogdan, Johannsen, Vivian Kvist, Joly, Carlos A., Jucker, Tommaso, Jung, Ilbin, Karminov, Viktor, Kartawinata, Kuswata, Kearsley, Elizabeth, Kenfack, David, Kennard, Deborah K., Kepfer-Rojas, Sebastian, Keppel, Gunnar, Khan, Mohammed Latif, Killeen, Timothy J., Kim, Hyun Seok, Kitayama, Kanehiro, Köhl, Michael, Korjus, Henn, Kraxner, Florian, Laarmann, Diana, Lang, Mait, Lewis, Simon L., Lu, Huicui, Lukina, Natalia V., Maitner, Brian S., Malhi, Yadvinder, Marcon, Eric, Marimon, Beatriz Schwantes, Marimon-Junior, Ben Hur, Marshall, Andrew R., Martin, Emanuel H., Martynenko, Olga, Meave, Jorge A., Melo-Cruz, Omar, Mendoza, Casimiro, Merow, Cory, Mendoza, Abel Monteagudo, Moreno, Vanessa S., Mukul, Sharif A., Mundhenk, Philip, Nava-Miranda, María Guadalupe, Neill, David, Neldner, Victor J., Nevenic, Radovan V., Ngugi, Michael R., Niklaus, Pascal A., Oleksyn, Jacek, Ontikov, Petr, Ortiz-Malavasi, Edgar, Pan, Yude, Paquette, Alain, Parada-Gutierrez, Alexander, Parfenova, Elena I., Park, Minjee, Parren, Marc, Parthasarathy, Narayanaswamy, Peri, Pablo L., Pfautsch, Sebastian, Phillips, Oliver L., Picard, Nicolas, Piedade, Maria Teresa T. F., Piotto, Daniel, Pitman, Nigel C. A., Polo, Irina, Poorter, Lourens, Poulsen, Axel D., Pretzsch, Hans, Ramirez Arevalo, Freddy, Restrepo-Correa, Zorayda, Rodeghiero, Mirco, Rolim, Samir G., Roopsind, Anand, Rovero, Francesco, Rutishauser, Ervan, Saikia, Purabi, Salas-Eljatib, Christian, Saner, Philippe, Schall, Peter, Schepaschenko, Dmitry, Scherer-Lorenzen, Michael, Schmid, Bernhard, Schöngart, Jochen, Searle, Eric B., Seben, Vladimír, Serra-Diaz, Josep M., Sheil, Douglas, Shvidenko, Anatoly Z., Silva-Espejo, Javier E., Silveira, Marcos, Singh, James, Sist, Plinio, Slik, Ferry, Sonké, Bonaventure, Souza, Alexandre F., Miscicki, Stanislaw, Stereńczak, Krzysztof J., Svenning, Jens-Christian, Svoboda, Miroslav, Swanepoel, Ben, Targhetta, Natalia, Tchebakova, Nadja, ter Steege, Hans, Thomas, Raquel, Tikhonova, Elena, Umunay, Peter M., Usoltsev, Vladimir A., Valencia, Renato, Valladares, Fernando, van der Plas, Fons, Do, Tran Van, van Nuland, Michael E., Vasquez, Rodolfo M., Verbeeck, Hans, Viana, Helder, Vibrans, Alexander C., Vieira, Simone, von Gadow, Klaus, Wang, Hua-Feng, Watson, James V., Werner, Gijsbert D. A., Wiser, Susan K., Wittmann, Florian, Woell, Hannsjoerg, Wortel, Verginia, Zagt, Roderik, Zawiła-Niedźwiecki, Tomasz, Zhang, Chunyu, Zhao, Xiuhai, Zhou, Mo, Zhu, Zhi-Xin, Zo-Bi, Irie C., and Maynard, Daniel S.

Published
2023
Full Text
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14. Modern pueblo, Zuni

Author

Hillers, John K. and Hillers, John K.

Subjects
Indians of North America Structures 1930-1940. New Mexico Zuni, Pueblo Indians Structures 1870-1890. New Mexico Zuni, Zuni Indians Structures 1870-1890. New Mexico Zuni, Pueblos 1870-1890. New Mexico Zuni, Women 1870-1890. New Mexico Zuni, Children 1870-1890. New Mexico Zuni, Adobe buildings 1870-1890. New Mexico Zuni, Zuni (N.M.) 1870-1890.
Abstract

A Native American (Zuni) woman and child wear woven blankets and pose beside an adobe structure at Zuni, New Mexico. A building has a window, a wooden framed doorway, and a chimney pot and gutter on the roof. Pumpkin or squash plants are on the ground near bundled sticks, pottery, woven baskets and an axe.

Published
2024

15. Canon de Chelly Monument, Ariz.

Author

Hillers, John K. and Hillers, John K.

Subjects
Rock formations 1870-1890. Arizona Canyon de Chelly National Monument, Canyons 1870-1890. Arizona Canyon de Chelly National Monument, Channels 1870-1890. Arizona Canyon de Chelly National Monument, Chine Wash (Ariz.) 1870-1890., Canyon de Chelly National Monument (Ariz.) 1870-1890.
Abstract

View of an eroded sandstone tower and rocky cliffs in Canyon de Chelly National Monument, Arizona. Boulders, sparse trees and a sandy creek bed, probably Chinle Wash, are in the valley.

Published
2024

16. View in de Chelley [sic] Canon, looking west, Arizona

Author

Hillers, John K. and Hillers, John K.

Subjects
Canyons 1870-1890. Arizona Canyon de Chelly National Monument, Rock formations 1870-1890. Arizona Canyon de Chelly National Monument, Canyon de Chelly National Monument (Ariz.) 1870-1890.
Abstract

Panoramic view of eroded sandstone pillars and canyon walls in Canyon de Chelly National Monument, Arizona. Trees, rocks and sand are in the valley.

Published
2024

17. Ruins near Fort Wingate, N.M.

Author

Hillers, John K. and Hillers, John K.

Subjects
Indians of North America Antiquities & archaeological sites 1870-1910. New Mexico Fort Wingate, Pueblo Indians Antiquities & archaeological sites 1870-1910. New Mexico Fort Wingate, Expeditions & surveys 1870-1910. New Mexico Fort Wingate, Archaeological sites 1870-1910. New Mexico Fort Wingate, Walls 1870-1910. New Mexico Fort Wingate, Fort Wingate (N.M.) 1870-1910.
Abstract

A man in a vest, pants and a hat and poses beside a rounded stone wall, a Native American (Anasazi) ruin, near Fort Wingate (McKinley County), New Mexico. Trees and a rocky hillside are nearby.

Published
2024

18. [Z]ion's Peak [sic], Rio Virgen, UT

Author

Hillers, John K. and Hillers, John K.

Subjects
Expeditions & surveys 1870-1880. Utah Zion National Park, Rock formations 1870-1880. Utah Zion National Park, Canyons 1870-1880. Utah Zion National Park, Rivers 1870-1880. Utah Zion National Park, Virgin River 1870-1880., Watchman, The (Utah) 1870-1880., Zion National Park (Utah) 1870-1880.
Abstract

View of the summit of The Watchman, a sandstone rock formation, and trees beside the Virgen River in Zion National Park, Utah.

Published
2024

19. Eroded sandstone, Kanab Canon, Ariz.

Author

Hillers, John K. and Hillers, John K.

Subjects
Expeditions & surveys 1870-1880. Arizona Grand Canyon National Park, Rock formations 1870-1880. Arizona Grand Canyon National Park, Kanab Canyon (Ariz.) 1870-1880., Grand Canyon National Park (Ariz.) 1870-1880.
Abstract

View of layered, eroded sandstone rock and hermit shale of the Esplanade Supai formation in Kanab Canyon, Grand Canyon National Park, Arizona. Shows a close-up of rounded rocks. Canyon walls are in the distance.

Published
2024

20. Cipauiluvi

Author

Hillers, John K. and Hillers, John K.

Subjects
Indians of North America Structures 1870-1890. Arizona Sipaulovi, Hopi Indians Structures 1870-1890. Arizona Sipaulovi, Pueblo Indians Structures 1870-1890. Arizona Sipaulovi, Pueblos 1870-1890. Arizona Sipaulovi, Mesas 1870-1890. Arizona Sipaulovi, Rock formations 1870-1890. Arizona Sipaulovi, Sipaulovi (Ariz.) 1870-1890.
Abstract

View of Sipaulovi (Cipaulovi), a Native American (Hopi) pueblo in Arizona. Adobe and stone, multi-story dwellings and ladders are atop a rocky butte. Loose rocks are in a ravine and narrow foot paths are near the pueblo.

Published
2024

21. Rio Virgen, Utah

Author

Hillers, John K. and Hillers, John K.

Subjects
Expeditions & surveys 1870-1880. Utah Zion National Park, Rivers 1870-1880. Utah Zion National Park, Canyons 1870-1880. Utah Zion National Park, Virgin River 1870-1880., Zion National Park (Utah) 1870-1880.
Abstract

View of the Virgin River, rocky shores and steep canyon walls, probably in Zion National Park, Utah.

Published
2024

22. Group of Zuni albinos

Author

Hillers, John K. and Hillers, John K.

Subjects
Indians of North America 1870-1890. New Mexico Zuni, Pueblo Indians 1870-1880. New Mexico Zuni, Zuni Indians 1870-1880. New Mexico Zuni, Women 1870-1880. New Mexico Zuni, Children 1870-1880. New Mexico Zuni, Albinos 1870-1880., Zuni (N.M.) 1870-1890.
Abstract

Native American (Zuni) albino men, women and a child sit and pose in front of an adobe wall at Zuni, New Mexico. The men wear woven shirts, leather leggings, breeches and moccasins. The women and a child wear shawls on their shoulders. A man wears a straw hat wrapped with fur and a beaded necklace. A woman holds a baby and a wide-brimmed straw hat is on the ground. A gutter and a viga are above cracks on the wall.

Published
2024

23. The Governor's House, Zuni

Author

Hillers, John K. and Hillers, John K.

Subjects
Indians of North America Structures 1870-1890. New Mexico Zuni, Zuni Indians Structures 1870-1890. New Mexico Zuni, Pueblos 1870-1890. New Mexico Zuni, Boys 1870-1890. New Mexico Zuni, Adobe buildings 1870-1890. New Mexico Zuni, Zuni (N.M.) 1870-1890.
Abstract

A Native American boy (Zuni) wears a woven shirt and leggings and poses beside a timber ladder and adobe and stone pueblo walls and buildings at Zuni, New Mexico. The structure identified as the "Governor's House" has a wooden framed doorway and window, timber rafters (vigas) and a chimney pot. Ristras, dried corn, probably some sort of fowl, metal buckets, a woven basket and painted pottery are in front of the building.

Published
2024

24. View in Zuni, looking S.E.

Author

Hillers, John K. and Hillers, John K.

Subjects
Zuni Indians Structures 1870-1890. New Mexico Zuni, Indians of North America Structures 1870-1890. New Mexico Zuni, Food drying 1870-1890. New Mexico Zuni, Pueblos 1870-1890. New Mexico Zuni, Zuni (N.M.) 1870-1890.
Abstract

Panoramic view of rooftops and adobe pueblo buildings at Zuni, New Mexico. Shows ladders, piles of corn and dried food near doorways. Stones and chimney pots are on roofs supported by timber rafters (vigas). Horses, fences and mesas are in the distance.

Published
2024

25. Captains of the canon, Canon de Chelley [sic], Ariz.

Author

Hillers, John K. and Hillers, John K.

Subjects
River channels 1870-1890. Arizona Canyon de Chelly National Monument, Rock formations 1870-1890. Arizona Canyon de Chelly National Monument, Canyons 1870-1890. Arizona Canyon de Chelly National Monument, Spider Rock (Ariz.) 1870-1890., Canyon de Chelly National Monument (Ariz.) 1870-1890.
Abstract

View of rock pillar formations, mesas and a stream bed in Canyon de Chelly National Monument, Arizona. Spider Rock has steep sandstone walls. Sparse trees are on mesas.

Published
2024

26. General view of Zuni

Author

Hillers, John K. and Hillers, John K.

Subjects
Zuni Indians Structures 1870-1890. New Mexico Zuni, Indians of North America Structures 1870-1890. New Mexico Zuni, Zuni architecture 1870-1890. New Mexico Zuni, Pueblos 1870-1890. New Mexico Zuni, Zuni (N.M.) 1870-1890.
Abstract

Panoramic view of Native American (Zuni) pueblos in New Mexico. Shows people gathered around adobe, multi-level structures in the distance. Wooden sticks form corral fences near the dwellings. Probably burros graze nearby. Timber ladders and rafters (vigas) are on the pueblo. Pottery is on an eroded wall near a path in the dirt.

Published
2024

27. Zuni, looking S.E.

Author

Hillers, John K. and Hillers, John K.

Subjects
Zuni Indians Structures 1870-1890. New Mexico Zuni, Indians of North America Structures 1870-1890. New Mexico Zuni, Zuni architecture 1870-1890. New Mexico Zuni, Pueblos 1870-1890. New Mexico Zuni, Mesas 1870-1890. New Mexico Zuni, Dowa Yalanne (McKinley County, N.M.) 1870-1890., Zuni (N.M.) 1870-1890.
Abstract

Panoramic view of the Native American, Zuni Pueblo in New Mexico. Shows rooftops of adobe and stone buildings with timber rafters (vigas), windows, chimneys and ladders. A woven rug and pottery are near a rooftop entrance. People and a tree are nearby. Wooden sticks form corral fences near dwellings. A mesa, Dowa Yalanne, (Corn Mountain) is in the distance.

Published
2024

28. Indian boy and his dog

Author

Hillers, John K. and Hillers, John K.

Subjects
Indians of North America 1870-1880. Utah, Ute Indians 1870-1880. Utah, Uintah Indians Clothing & dress 1870-1880. Utah, Dogs 1870-1880. Utah, Bows (Archery) 1870-1880. Utah, Arrows 1870-1880. Utah, Wasatch Range (Utah and Idaho) 1870-1880.
Abstract

A young Native American Ute man with wrapped braids, wearing leggings, and a necklace, holds his dog around the neck in one hand and a bow and arrows in the other, western slope Wasatch Mountains, Utah.

Published
2024

29. Babe in cradle

Author

Hillers, John K. and Hillers, John K.

Subjects
Indians of North America 1870-1880. Utah, Ute Indians Children 1870-1880. Utah, Uintah Indians 1870-1880. Utah, Hides & skins 1870-1880. Utah, Cradleboards 1870-1880. Utah, Infants 1870-1880. Utah
Abstract

A Native American Ute child sits on a buffalo hide next to an infant in a cradleboard, western slope Wasatch Mountains, Utah. Care of young children was often left to older siblings, freeing parents to perform other necessary duties. Corn hangs on a line behind them.

Published
2024

30. Indians counting

Author

Hillers, John K. and Hillers, John K.

Subjects
Indians of North America 1870-1880. Utah, Ute Indians Clothing & dress 1870-1880. Utah, Uintah Indians 1870-1880. Utah, Wasatch Range (Utah and Idaho) 1870-1880.
Abstract

Two Native American Ute men stand on a buffalo hide, talking, western slope Wasatch Mountains, Utah. One of the men, wearing a shirt and leggings, leans on a rifle and carries a powder horn with a beaded strap, as the other man, wearing a fringed shirt and leggings, speaks to him with three fingers raised.

Published
2024

31. The warrior and his bride

Author

Hillers, John K. and Hillers, John K.

Subjects
Indians of North America 1870-1880. Utah, Ute Indians Children 1870-1880. Utah, Uintah Indians 1870-1880. Utah, Spouses 1870-1880. Utah, Horseback riding 1870-1880. Utah, Body painting 1870-1880. Utah, Wasatch Range (Utah and Idaho) 1870-1880.
Abstract

Portrait of a Native American Ute man and his young bride on horses, western slope Wasatch Mountains, Utah. The warrior is covered in body paint, wears a roach in his hair, and holds a gun, the young girl wears a long, decorative covering.

Published
2024

32. Boy and girl

Author

Hillers, John K. and Hillers, John K.

Subjects
Indians of North America Clothing & dress 1870-1880. Utah, Ute Indians Children 1870-1880. Utah, Uintah Indians 1870-1880. Utah, Boys 1870-1880. Utah, Girls 1870-1880. Utah, Hides & skins 1870-1880. Utah
Abstract

A young Native American Ute boy and girl sit on a buffalo skin; the boy points to something. Both wear fringed hide clothing.

Published
2024

33. Indian girl on horseback

Author

Hillers, John K. and Hillers, John K.

Subjects
Indians of North America 1870-1880. Utah, Ute Indians Women 1870-1880. Utah, Uintah Indians Clothing & dress 1870-1880. Utah, Horses 1870-1880. Utah, Uintah and Ouray Indian Reservation (Utah) 1870-1880., Wasatch Range (Utah and Idaho) 1870-1880.
Abstract

A Native American Ute girl sits on a horse, western slope Wasatch Mountains, Utah. The horse is decoratively adorned with beadwork, tassles, and saddlebags, the girl wears fringed leather boots and clothing and is a member of Sai-ar's family.

Published
2024

34. Sai-ar and his family

Author

Hillers, John K. and Hillers, John K.

Subjects
Uinta Indians 1870-1880. Utah, Ute Indians 1870-1880. Utah, Indians of North America 1870-1880. Utah, Families 1870-1880. Utah, Utah 1870-1880., Wasatch Range (Utah and Idaho) 1870-1880.
Abstract

Saiar, his wife, and a baby, all Native American Utes, sit on an animal hide in front of thick brush on the western slope of the Wasatch Mountains, Utah. All wear bead necklaces over traditional clothing.

Published
2024

35. Sai-ar's home

Author

Hillers, John K. and Hillers, John K.

Subjects
Ute Indians 1870-1880. Utah, Indians of North America 1870-1880. Utah, Uinta Indians 1870-1880. Utah, Families 1870-1880. Utah, Utah 1870-1880., Wasatch Range (Utah and Idaho) 1870-1880.
Abstract

A family of Native American Utes, identified as Saiar's family, poses outside of a tepee on the western slope of the Wasatch Mountains, Utah. Saiar, two women, and a baby are included. One of the women is on the back of a horse which is highly decorated with beadwork and saddlebags. A dog and wrapped bundles are nearby.

Published
2024

36. Tau-ruv sitting

Author

Hillers, John K. and Hillers, John K.

Subjects
Ute Indians 1870-1880. Utah, Uinta Indians 1870-1880. Utah, Indians of North America 1870-1880. Utah, Utah 1870-1880., Wasatch Range (Utah and Idaho) 1870-1880.
Abstract

A Native American Ute woman, identified as Tauruv, sits near trees on the western slope of the Wasatch Mountains, Utah. She wears a decorative shawl over a fringed hide dress, and holds a pouch in her lap.

Published
2024

37. Shi-rah-rah, wife of To-ko-wah-ner

Author

Hillers, John K. and Hillers, John K.

Subjects
Ute Indians Women 1870-1880. Utah, Indians of North America 1870-1880. Utah, Families., Wasatch Range (Utah and Idaho) 1870-1880., Utah 1870-1880.
Abstract

Sitting portrait of a Native American Ute woman, identified as Shirahrah, wife of Tokowahner, western slope Wasatch Mountains, Utah. She wears a fringed hide dress decorated with beads and shells and has a pouch near her feet. Trees and brush are behind her.

Published
2024

38. Laguna

Author

Hillers, John K. and Hillers, John K.

Subjects
Pueblo Indians Structures 1880-1890. New Mexico Laguna, Indians of North America Structures 1880-1890. New Mexico Laguna, Laguna Indians Structures 1880-1890. New Mexico Laguna, Pueblos Structures 1880-1890. New Mexico Laguna, Laguna (N.M.) 1880-1890., Rio Puerco (Rio Arriba County-Socorro County, N.M.) 1880-1890.
Abstract

View of Laguna Pueblo, New Mexico; shows Native American adobe dwellings, sheep pens, ovens, Rio Puerco, and eroded embankments.

Published
2024

40. Home of Antero : living in the U-in-ta Valley, on the western slope of the Wasatch Mountains

Author

Hillers, John K. and Hillers, John K.

Subjects
Indians of North America Structures 1860-1870. Utah, Ute Indians Structures 1860-1870. Utah, Tipis 1860-1870. Utah, Homes., Wasatch Range (Utah and Idaho) 1860-1870.
Abstract

View of a Native American (Ute) settlement; shows people, a teepee, a stilt-shelter with notched log steps, a cooking tripod, a saddle, and a bottle.

Published
2024

41. Cluster perturbation theory IX: Perturbation series for the coupled cluster singles and doubles ground state energy.

Author

Hillers-Bendtsen, Andreas Erbs, Jensen, Frank, Mikkelsen, Kurt V., Olsen, Jeppe, and Jørgensen, Poul

Subjects
*GROUND state energy, *PERTURBATION theory, *NATURAL orbitals, *RATE coefficients (Chemistry), *BASE pairs
Abstract

In this paper, we develop and analyze a number of perturbation series that target the coupled cluster singles and doubles (CCSD) ground state energy. We show how classical Møller–Plesset perturbation theory series can be restructured to target the CCSD energy based on a reference CCS calculation and how the corresponding cluster perturbation series differs from the classical Møller–Plesset perturbation series. Subsequently, we reformulate these series using the coupled cluster Lagrangian framework to obtain series, where fourth and fifth order energies are determined only using parameters through second order. To test the methods, we perform a series of test calculations on molecular photoswitches of both total energies and reaction energies. We find that the fifth order reaction energies are of CCSD quality and that they are of comparable accuracy to state-of-the-art approximations to the CCSD energy based on local pair natural orbitals. The advantage of the present approach over local correlation methods is the absence of user defined threshold parameters for neglecting or approximating contributions to the correlation energy. Fixed threshold parameters lead to discontinuous energy surfaces, although this effect is often small enough to be ignored, but the present approach has a differentiable energy that will facilitate derivation and implementation of gradients and higher derivatives. A further advantage is that the calculation of the perturbation correction is non-iterative and can, therefore, be calculated in parallel, leading to a short time-to-solution. [ABSTRACT FROM AUTHOR]

Published
2024
Full Text
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43. Corrigendum: Coupled cluster theory on modern heterogeneous supercomputers

Author

Hector H. Corzo, Andreas Erbs Hillers-Bendtsen, Ashleigh Barnes, Abdulrahman Y. Zamani, Filip Pawłowski, Jeppe Olsen, Poul Jørgensen, Kurt V. Mikkelsen, and Dmytro Bykov

Subjects
coupled cluster theory, divide-expand-consolidate coupled cluster framework, cluster perturbation theory, excitation energies, tetrahydrocannabinol, deoxyribonucleic acid, Chemistry, QD1-999
Published
2023
Full Text
View/download PDF

44. Sexual Dichromatism Drives Diversification within a Major Radiation of African Amphibians

Author

Portik, Daniel M, Bell, Rayna C, Blackburn, David C, Bauer, Aaron M, Barratt, Christopher D, Branch, William R, Burger, Marius, Channing, Alan, Colston, Timothy J, Conradie, Werner, Dehling, J Maximilian, Drewes, Robert C, Ernst, Raffael, Greenbaum, Eli, Gvoždík, Václav, Harvey, James, Hillers, Annika, Hirschfeld, Mareike, Jongsma, Gregory FM, Kielgast, Jos, Kouete, Marcel T, Lawson, Lucinda P, Leaché, Adam D, Loader, Simon P, Lötters, Stefan, Van Der Meijden, Arie, Menegon, Michele, Müller, Susanne, Nagy, Zoltán T, Ofori-Boateng, Caleb, Ohler, Annemarie, Papenfuss, Theodore J, Rößler, Daniela, Sinsch, Ulrich, Rödel, Mark-Oliver, Veith, Michael, Vindum, Jens, Zassi-Boulou, Ange-Ghislain, and McGuire, Jimmy A

Subjects
Zoology, Evolutionary Biology, Biological Sciences, Infectious Diseases, Africa, Animals, Anura, Biological Evolution, Female, Male, Phylogeny, Pigmentation, Sex Characteristics, Afrobatrachia, color evolution, diversification, macroevolution, sexual selection, Genetics, Ecology, Evolutionary biology
Abstract

Theory predicts that sexually dimorphic traits under strong sexual selection, particularly those involved with intersexual signaling, can accelerate speciation and produce bursts of diversification. Sexual dichromatism (sexual dimorphism in color) is widely used as a proxy for sexual selection and is associated with rapid diversification in several animal groups, yet studies using phylogenetic comparative methods to explicitly test for an association between sexual dichromatism and diversification have produced conflicting results. Sexual dichromatism is rare in frogs, but it is both striking and prevalent in African reed frogs, a major component of the diverse frog radiation termed Afrobatrachia. In contrast to most other vertebrates, reed frogs display female-biased dichromatism in which females undergo color transformation, often resulting in more ornate coloration in females than in males. We produce a robust phylogeny of Afrobatrachia to investigate the evolutionary origins of sexual dichromatism in this radiation and examine whether the presence of dichromatism is associated with increased rates of net diversification. We find that sexual dichromatism evolved once within hyperoliids and was followed by numerous independent reversals to monochromatism. We detect significant diversification rate heterogeneity in Afrobatrachia and find that sexually dichromatic lineages have double the average net diversification rate of monochromatic lineages. By conducting trait simulations on our empirical phylogeny, we demonstrate that our inference of trait-dependent diversification is robust. Although sexual dichromatism in hyperoliid frogs is linked to their rapid diversification and supports macroevolutionary predictions of speciation by sexual selection, the function of dichromatism in reed frogs remains unclear. We propose that reed frogs are a compelling system for studying the roles of natural and sexual selection on the evolution of sexual dichromatism across micro- and macroevolutionary timescales.

Published
2019

45. Co-limitation towards lower latitudes shapes global forest diversity gradients

Author

Liang, Jingjing, Gamarra, Javier G. P., Picard, Nicolas, Zhou, Mo, Pijanowski, Bryan, Jacobs, Douglass F., Reich, Peter B., Crowther, Thomas W., Nabuurs, Gert-Jan, de-Miguel, Sergio, Fang, Jingyun, Woodall, Christopher W., Svenning, Jens-Christian, Jucker, Tommaso, Bastin, Jean-Francois, Wiser, Susan K., Slik, Ferry, Hérault, Bruno, Alberti, Giorgio, Keppel, Gunnar, Hengeveld, Geerten M., Ibisch, Pierre L., Silva, Carlos A., ter Steege, Hans, Peri, Pablo L., Coomes, David A., Searle, Eric B., von Gadow, Klaus, Jaroszewicz, Bogdan, Abbasi, Akane O., Abegg, Meinrad, Yao, Yves C. Adou, Aguirre-Gutiérrez, Jesús, Zambrano, Angelica M. Almeyda, Altman, Jan, Alvarez-Dávila, Esteban, Álvarez-González, Juan Gabriel, Alves, Luciana F., Amani, Bienvenu H. K., Amani, Christian A., Ammer, Christian, Ilondea, Bhely Angoboy, Antón-Fernández, Clara, Avitabile, Valerio, Aymard, Gerardo A., Azihou, Akomian F., Baard, Johan A., Baker, Timothy R., Balazy, Radomir, Bastian, Meredith L., Batumike, Rodrigue, Bauters, Marijn, Beeckman, Hans, Benu, Nithanel Mikael Hendrik, Bitariho, Robert, Boeckx, Pascal, Bogaert, Jan, Bongers, Frans, Bouriaud, Olivier, Brancalion, Pedro H. S., Brandl, Susanne, Brearley, Francis Q., Briseno-Reyes, Jaime, Broadbent, Eben N., Bruelheide, Helge, Bulte, Erwin, Catlin, Ann Christine, Cazzolla Gatti, Roberto, César, Ricardo G., Chen, Han Y. H., Chisholm, Chelsea, Cienciala, Emil, Colletta, Gabriel D., Corral-Rivas, José Javier, Cuchietti, Anibal, Cuni-Sanchez, Aida, Dar, Javid A., Dayanandan, Selvadurai, de Haulleville, Thales, Decuyper, Mathieu, Delabye, Sylvain, Derroire, Géraldine, DeVries, Ben, Diisi, John, Do, Tran Van, Dolezal, Jiri, Dourdain, Aurélie, Durrheim, Graham P., Obiang, Nestor Laurier Engone, Ewango, Corneille E. N., Eyre, Teresa J., Fayle, Tom M., Feunang, Lethicia Flavine N., Finér, Leena, Fischer, Markus, Fridman, Jonas, Frizzera, Lorenzo, de Gasper, André L., Gianelle, Damiano, Glick, Henry B., Gonzalez-Elizondo, Maria Socorro, Gorenstein, Lev, Habonayo, Richard, Hardy, Olivier J., Harris, David J., Hector, Andrew, Hemp, Andreas, Herold, Martin, Hillers, Annika, Hubau, Wannes, Ibanez, Thomas, Imai, Nobuo, Imani, Gerard, Jagodzinski, Andrzej M., Janecek, Stepan, Johannsen, Vivian Kvist, Joly, Carlos A., Jumbam, Blaise, Kabelong, Banoho L. P. R., Kahsay, Goytom Abraha, Karminov, Viktor, Kartawinata, Kuswata, Kassi, Justin N., Kearsley, Elizabeth, Kennard, Deborah K., Kepfer-Rojas, Sebastian, Khan, Mohammed Latif, Kigomo, John N., Kim, Hyun Seok, Klauberg, Carine, Klomberg, Yannick, Korjus, Henn, Kothandaraman, Subashree, Kraxner, Florian, Kumar, Amit, Kuswandi, Relawan, Lang, Mait, Lawes, Michael J., Leite, Rodrigo V., Lentner, Geoffrey, Lewis, Simon L., Libalah, Moses B., Lisingo, Janvier, López-Serrano, Pablito Marcelo, Lu, Huicui, Lukina, Natalia V., Lykke, Anne Mette, Maicher, Vincent, Maitner, Brian S., Marcon, Eric, Marshall, Andrew R., Martin, Emanuel H., Martynenko, Olga, Mbayu, Faustin M., Mbuvi, Musingo T. E., Meave, Jorge A., Merow, Cory, Miscicki, Stanislaw, Moreno, Vanessa S., Morera, Albert, Mukul, Sharif A., Müller, Jörg C., Murdjoko, Agustinus, Nava-Miranda, Maria Guadalupe, Ndive, Litonga Elias, Neldner, Victor J., Nevenic, Radovan V., Nforbelie, Louis N., Ngoh, Michael L., N’Guessan, Anny E., Ngugi, Michael R., Ngute, Alain S. K., Njila, Emile Narcisse N., Nyako, Melanie C., Ochuodho, Thomas O., Oleksyn, Jacek, Paquette, Alain, Parfenova, Elena I., Park, Minjee, Parren, Marc, Parthasarathy, Narayanaswamy, Pfautsch, Sebastian, Phillips, Oliver L., Piedade, Maria T. F., Piotto, Daniel, Pollastrini, Martina, Poorter, Lourens, Poulsen, John R., Poulsen, Axel Dalberg, Pretzsch, Hans, Rodeghiero, Mirco, Rolim, Samir G., Rovero, Francesco, Rutishauser, Ervan, Sagheb-Talebi, Khosro, Saikia, Purabi, Sainge, Moses Nsanyi, Salas-Eljatib, Christian, Salis, Antonello, Schall, Peter, Schepaschenko, Dmitry, Scherer-Lorenzen, Michael, Schmid, Bernhard, Schöngart, Jochen, Šebeň, Vladimír, Sellan, Giacomo, Selvi, Federico, Serra-Diaz, Josep M., Sheil, Douglas, Shvidenko, Anatoly Z., Sist, Plinio, Souza, Alexandre F., Stereńczak, Krzysztof J., Sullivan, Martin J. P., Sundarapandian, Somaiah, Svoboda, Miroslav, Swaine, Mike D., Targhetta, Natalia, Tchebakova, Nadja, Trethowan, Liam A., Tropek, Robert, Mukendi, John Tshibamba, Umunay, Peter Mbanda, Usoltsev, Vladimir A., Vaglio Laurin, Gaia, Valentini, Riccardo, Valladares, Fernando, van der Plas, Fons, Vega-Nieva, Daniel José, Verbeeck, Hans, Viana, Helder, Vibrans, Alexander C., Vieira, Simone A., Vleminckx, Jason, Waite, Catherine E., Wang, Hua-Feng, Wasingya, Eric Katembo, Wekesa, Chemuku, Westerlund, Bertil, Wittmann, Florian, Wortel, Verginia, Zawiła-Niedźwiecki, Tomasz, Zhang, Chunyu, Zhao, Xiuhai, Zhu, Jun, Zhu, Xiao, Zhu, Zhi-Xin, Zo-Bi, Irie C., and Hui, Cang

Published
2022
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47. 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

48. Coupled cluster theory on modern heterogeneous supercomputers

Author

Hector H. Corzo, Andreas Erbs Hillers-Bendtsen, Ashleigh Barnes, Abdulrahman Y. Zamani, Filip Pawłowski, Jeppe Olsen, Poul Jørgensen, Kurt V. Mikkelsen, and Dmytro Bykov

Subjects
coupled cluster theory, divide-expand-consolidate coupled cluster framework, cluster perturbation theory, excitation energies, tetrahydrocannabinol, deoxyribonucleic acid, Chemistry, QD1-999
Abstract

This study examines the computational challenges in elucidating intricate chemical systems, particularly through ab-initio methodologies. This work highlights the Divide-Expand-Consolidate (DEC) approach for coupled cluster (CC) theory—a linear-scaling, massively parallel framework—as a viable solution. Detailed scrutiny of the DEC framework reveals its extensive applicability for large chemical systems, yet it also acknowledges inherent limitations. To mitigate these constraints, the cluster perturbation theory is presented as an effective remedy. Attention is then directed towards the CPS (D-3) model, explicitly derived from a CC singles parent and a doubles auxiliary excitation space, for computing excitation energies. The reviewed new algorithms for the CPS (D-3) method efficiently capitalize on multiple nodes and graphical processing units, expediting heavy tensor contractions. As a result, CPS (D-3) emerges as a scalable, rapid, and precise solution for computing molecular properties in large molecular systems, marking it an efficient contender to conventional CC models.

Published
2023
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49. Author Correction: Native diversity buffers against severity of non-native tree invasions

Author

Delavaux, Camille S., Crowther, Thomas W., Zohner, Constantin M., Robmann, Niamh M., Lauber, Thomas, van den Hoogen, Johan, Kuebbing, Sara, Liang, Jingjing, de-Miguel, Sergio, Nabuurs, Gert-Jan, Reich, Peter B., Abegg, Meinrad, Adou Yao, Yves C., Alberti, Giorgio, Almeyda Zambrano, Angelica M., Alvarado, Braulio Vilchez, Alvarez-Dávila, Esteban, Alvarez-Loayza, Patricia, Alves, Luciana F., Ammer, Christian, Antón-Fernández, Clara, Araujo-Murakami, Alejandro, Arroyo, Luzmila, Avitabile, Valerio, Aymard, Gerardo A., Baker, Timothy R., Bałazy, Radomir, Banki, Olaf, Barroso, Jorcely G., Bastian, Meredith L., Bastin, Jean-Francois, Birigazzi, Luca, Birnbaum, Philippe, Bitariho, Robert, Boeckx, Pascal, Bongers, Frans, Bouriaud, Olivier, Brancalion, Pedro H. S., Brandl, Susanne, Brienen, Roel, Broadbent, Eben N., Bruelheide, Helge, Bussotti, Filippo, Gatti, Roberto Cazzolla, César, Ricardo G., Cesljar, Goran, Chazdon, Robin, Chen, Han Y. H., Chisholm, Chelsea, Cho, Hyunkook, Cienciala, Emil, Clark, Connie, Clark, David, Colletta, Gabriel D., Coomes, David A., Cornejo Valverde, Fernando, Corral-Rivas, José J., Crim, Philip M., Cumming, Jonathan R., Dayanandan, Selvadurai, de Gasper, André L., Decuyper, Mathieu, Derroire, Géraldine, DeVries, Ben, Djordjevic, Ilija, Dolezal, Jiri, Dourdain, Aurélie, Engone Obiang, Nestor Laurier, Enquist, Brian J., Eyre, Teresa J., Fandohan, Adandé Belarmain, Fayle, Tom M., Feldpausch, Ted R., Ferreira, Leandro V., Fischer, Markus, Fletcher, Christine, Frizzera, Lorenzo, Gamarra, Javier G. P., Gianelle, Damiano, Glick, Henry B., Harris, David J., Hector, Andrew, Hemp, Andreas, Hengeveld, Geerten, Hérault, Bruno, Herbohn, John L., Herold, Martin, Hillers, Annika, Honorio Coronado, Eurídice N., Hui, Cang, Ibanez, Thomas T., Amaral, Iêda, Imai, Nobuo, Jagodziński, Andrzej M., Jaroszewicz, Bogdan, Johannsen, Vivian Kvist, Joly, Carlos A., Jucker, Tommaso, Jung, Ilbin, Karminov, Viktor, Kartawinata, Kuswata, Kearsley, Elizabeth, Kenfack, David, Kennard, Deborah K., Kepfer-Rojas, Sebastian, Keppel, Gunnar, Khan, Mohammed Latif, Killeen, Timothy J., Kim, Hyun Seok, Kitayama, Kanehiro, Köhl, Michael, Korjus, Henn, Kraxner, Florian, Laarmann, Diana, Lang, Mait, Lewis, Simon L., Lu, Huicui, Lukina, Natalia V., Maitner, Brian S., Malhi, Yadvinder, Marcon, Eric, Marimon, Beatriz Schwantes, Marimon-Junior, Ben Hur, Marshall, Andrew R., Martin, Emanuel H., Martynenko, Olga, Meave, Jorge A., Melo-Cruz, Omar, Mendoza, Casimiro, Merow, Cory, Mendoza, Abel Monteagudo, Moreno, Vanessa S., Mukul, Sharif A., Mundhenk, Philip, Nava-Miranda, María Guadalupe, Neill, David, Neldner, Victor J., Nevenic, Radovan V., Ngugi, Michael R., Niklaus, Pascal A., Oleksyn, Jacek, Ontikov, Petr, Ortiz-Malavasi, Edgar, Pan, Yude, Paquette, Alain, Parada-Gutierrez, Alexander, Parfenova, Elena I., Park, Minjee, Parren, Marc, Parthasarathy, Narayanaswamy, Peri, Pablo L., Pfautsch, Sebastian, Phillips, Oliver L., Picard, Nicolas, Piedade, Maria Teresa T. F., Piotto, Daniel, Pitman, Nigel C. A., Polo, Irina, Poorter, Lourens, Poulsen, Axel D., Pretzsch, Hans, Ramirez Arevalo, Freddy, Restrepo-Correa, Zorayda, Rodeghiero, Mirco, Rolim, Samir G., Roopsind, Anand, Rovero, Francesco, Rutishauser, Ervan, Saikia, Purabi, Salas-Eljatib, Christian, Saner, Philippe, Schall, Peter, Schepaschenko, Dmitry, Scherer-Lorenzen, Michael, Schmid, Bernhard, Schöngart, Jochen, Searle, Eric B., Seben, Vladimír, Serra-Diaz, Josep M., Sheil, Douglas, Shvidenko, Anatoly Z., Silva-Espejo, Javier E., Silveira, Marcos, Singh, James, Sist, Plinio, Slik, Ferry, Sonké, Bonaventure, Souza, Alexandre F., Miscicki, Stanislaw, Stereńczak, Krzysztof J., Svenning, Jens-Christian, Svoboda, Miroslav, Swanepoel, Ben, Targhetta, Natalia, Tchebakova, Nadja, ter Steege, Hans, Thomas, Raquel, Tikhonova, Elena, Umunay, Peter M., Usoltsev, Vladimir A., Valencia, Renato, Valladares, Fernando, van der Plas, Fons, Do, Tran Van, van Nuland, Michael E., Vasquez, Rodolfo M., Verbeeck, Hans, Viana, Helder, Vibrans, Alexander C., Vieira, Simone, von Gadow, Klaus, Wang, Hua-Feng, Watson, James V., Werner, Gijsbert D. A., Wiser, Susan K., Wittmann, Florian, Woell, Hannsjoerg, Wortel, Verginia, Zagt, Roderik, Zawiła-Niedźwiecki, Tomasz, Zhang, Chunyu, Zhao, Xiuhai, Zhou, Mo, Zhu, Zhi-Xin, Zo-Bi, Irie C., and Maynard, Daniel S.

Published
2023
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50. Norbornadiene‐Quadricyclane Photoswitches with Enhanced Solar Spectrum Match.

Author

Aslam, Adil S., Muhammad, Lidiya M., Erbs Hillers‐Bendtsen, Andreas, Mikkelsen, Kurt V., and Moth‐Poulsen, Kasper

Subjects
MOLECULAR structure, DENSITY functional theory, LIGHT absorption, ABSORPTION spectra, ENERGY storage
Abstract

Herein, we report monomeric and dimeric norbornadiene‐quadricyclane molecular photoswitch systems intended for molecular solar thermal applications. A series of six new norbornadiene derivatives conjugated with benzothiadiazole as the acceptor unit and dithiafulvene as the donor unit were synthesized and fully characterized. The photoswitches were evaluated by experimentally and theoretically measuring optical absorption profiles and thermal conversion of quadricyclane to norbornadiene. Computational insight by density functional theory calculations at the M06‐2X/def2‐SVPD level of theory provided geometries, storage energies, UV‐vis absorption spectra, and HOMO‐LUMO levels that are used to describe the function of the molecular systems. The studied molecules exhibit absorption onset ranging from 416 nm to 595 nm due to a systemic change in their donor‐acceptor character. This approach was advantageous due to the introduction of benzothiadiazole and the dimeric nature of molecular structures. The best‐performing system has a half‐life of 3 days with quantum yields over 50 %. [ABSTRACT FROM AUTHOR]

Published
2024
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