Morphological variability as a buffer against extinction: insights from Hawaiian honeycreepers Irina Birskis-Barros, Ana Paula A. Assis, Helen James, Sora L. Kim, Justin D. Yeakel Proceedings of the Royal Society B Biological Sciences, 2026 Trait variation is essential for population-level responses to novel selective pressures. Because beak morphology is a trait crucial for tasks directly influencing fitness, such as resource acquisition, we hypothesize that species with greater intraspecific variation in beak morphology may access a broader range of food resources, promoting an expanded dietary niche and potentially reducing extinction risk. Hawaiian honeycreepers, once comprising about 60 species, have suffered a high rate of extinction, with less than 35% of species persisting today. We quantified beak morphological variation of extinct and extant Hawaiian honeycreepers collected between 1880 and 1913 and estimated species’ niche breadth from stable isotope ratios. While a direct link between morphology and diet variation was not evident at the community level, our analysis revealed that, within guilds, species with lower morphological variation also exhibited narrower isotopic niches. Moreover, extinct species had less morphological variation than those extant, suggesting a link between adaptive potential and extinction vulnerability. Our study highlights the value of historical datasets and museum collections, not only for understanding past ecological patterns but also for providing critical baselines to compare with extant species, allowing us to better interpret present-day biodiversity and extinction risk through the lens of the past.
Ups and downs of public attention on climate change: the southern Brazil floods through Anthony Downs’s issue-attention cycle Guilherme Borba Lefèvre, Ana Paula Aprígio Assis, Eduardo de Lima Caldas Sustainability in Debate, 2025 Este artigo analisa a reação da atenção pública no Brasil às inundações ocorridas no Rio Grande do Sul em 2024, com foco no problema da mudança do clima, investigando se esse comportamento segue o “Ciclo de Atenção” proposto por Downs (1972). A pesquisa focou o termo “mudanças climáticas” no website da Folha de S. Paulo para avaliar o volume de reportagens publicadas 3 meses antes e 6 meses depois do evento. Os dados revelam um aumento expressivo na cobertura jornalística sobre mudanças climáticas logo após as inundações, sugerindo maior interesse da população pelo tema. No entanto, cerca de 30 dias após o evento, observou-se uma queda acentuada na quantidade de notícias. Esses resultados indicam que a atenção pública é breve e volátil, limitando o tempo disponível para intervenção por parte de formuladores de políticas públicas, entre outros, em propor soluções durante uma possível “janela de oportunidades” gerada por eventos extremos.
Is the audience gender-blind? Smaller attendance in female talks highlights an imbalanced visibility in academia Júlia Rodrigues Barreto, Isabella Romitelli, Pamela Cristina Santana, Ana Paula Aprígio Assis, Renata Pardini, Melina de Souza Leite Npj Biodiversity, 2025 Diverse perspectives are essential to the advancement of biodiversity science, yet persistent structural biases continue to shape who is seen and heard in academic spaces. Despite efforts to promote inclusivity, it remains unclear whether increased representation translates into equitable visibility and engagement from peers. Seminar talks, key arenas for idea exchange and networking, offer a window into how such dynamics unfold. Here, we used long-term data from a well-established Brazilian seminar series in ecology and conservation science to examine whether affirmative actions have narrowed gender gaps in academic visibility, measured through audience attendance. We show that women, particularly at senior academic levels, consistently drew smaller audiences than their male counterparts. This visibility gap persisted even after accounting for differences in speaker productivity, career length, and talk topics, and despite institutional affirmative actions to increase gender representation. The findings suggest that representation alone may be insufficient to overcome ingrained recognition biases, highlighting how subtle forms of exclusion can persist in academic culture. By documenting these gendered patterns within the academic environment, our study contributes to a broader understanding of how visibility and recognition are unequally distributed, and it supports ongoing efforts to foster a more equitable and robust scientific community.
Control of hepatic gluconeogenesis in mice fed a high protein diet: a transcriptional shift from CREB to FoxO1 João Batista Camargo Neto, Henrique J. Novaes Morgan, Matheus Leonardo Moro, Ana Paula Assis, Leticia Cirelli Ruiz, Aline Zanatta Schavinski, Natalia E. S. Lautherbach, Luiz Carlos Navegantes, Isis C. Kettelhut American Journal of Physiology Endocrinology and Metabolism, 2025 The regulation of hepatic glucose production under a high-protein (HP) diet remains unclear. We show that gluconeogenesis in HP-fed mice is initially driven by CREB but shifts to FoxO1 dependence over time. Notably, FoxO1 is essential for maintaining gluconeogenesis and glycemia in HP-adapted animals. We also reveal a key role for corticosterone in preserving gluconeogenic capacity and fasting glycemia. These findings provide insights into hepatic metabolic adaptation and into molecular mechanisms governing glycemic homeostasis.
Rare Phyla, Such as CPR and DPANN, Shape Ecosystem-Level Microbial Community Structure Dissimilarities Camilo M. Ferreira, Diogo Burgos de Affonseca, Felipe A. S. Barbosa, Amanda B. Campos, Rafael Menezes, Leonardo Brait, Pablo A. B. Viana, Amaro E. Trindade-Silva, Miguel Loiola, Arthur R. Azevedo, Felipe H. Coutinho, Ana Paula A. Assis, Thiago Bruce, Pablo I. P. Ramos, Anderson Ara, Rose Brouns, Roberto F. S. Andrade, Paulo R. Guimarães, Pedro Milet Meirelles Microbial Ecology, 2025 Rare microbial lineages, such as members of the candidate phyla radiation (CPR) bacteria and Diapherotrites, Parvarchaeota, Aenigmarchaeota, Nanoarchaeota, and Nanohaloarchaeota (DPANN) archaea, are increasingly recognized as key components of microbial communities in natural systems. Yet, their global distribution, biogeographic patterns, and broader role in shaping microbial community structure across diverse ecosystems remain poorly characterized. Here, we analyzed 2860 metagenomes spanning nine ecosystems using a curated reference database and a bias-aware taxonomic filtering approach to quantify the richness, relative abundance, and structural influence of low-abundance microbial taxa on community structure across a wide range of ecosystems. Our findings reveal that rare taxa, primarily CPR and DPANN, disproportionately shape microbial community dissimilarities across global ecosystems. We observed that the richness of these two groups, that drives community structure variation, increases with latitude, peaking in temperate regions, thereby contrasting classical latitudinal diversity patterns and suggesting unique biogeographic drivers. CPR and DPANN were predominantly enriched in free-living environments, particularly groundwater and soil, then in host-associated habitats, consistent with niche specialization shaped by environmental filtering and dispersal constraints. These findings challenge abundance-centric assumptions in microbial ecology and highlight the need to integrate low-abundance taxa into macroecological frameworks. Fully resolving their ecological functions, however, will require targeted experimental and multi-omics investigations.
Perinatal Vitamin D Deficiency Enhances Brown Adipose Tissue Thermogenesis in Weanling Rats Matheus L. Moro, Natany G. Reis, Aline Z. Schavinski, João B. Camargo Neto, Ana Paula Assis, Jonathas R. Santos, Luciane C. Albericci, Isis C. Kettelhut, Luiz C. C. Navegantes International Journal of Molecular Sciences, 2025 Perinatal vitamin D (Vit. D) deficiency (VDD) disrupts the development of key tissues involved in metabolic regulation, including the endocrine pancreas, white adipose tissue, and skeletal muscle. Brown adipose tissue (BAT), essential for thermoregulation and energy homeostasis, may also be affected, but the impact of perinatal VDD on BAT physiology remains unclear. In this study, forty female Wistar rats were fed either a standard AIN93G diet (1000 IU Vit. D3/kg; control group, CT) (n = 20) or a modified AIN93G diet lacking Vit. D (VDD group) (n = 20) for six weeks prior to conception and throughout gestation and lactation. Male offspring were evaluated at weaning (PN21) and adulthood (PN180) after Vit. D status was normalized through a standard diet. We found that perinatal VDD reduced total lipid droplet area, increased oxygen consumption, and upregulated thermogenic gene expression in BAT at weaning. Correspondingly, VDD offspring exhibited greater cold tolerance and enhanced BAT recruitment upon cold exposure (4 °C). Notably, normalization of Vit. D status by adulthood fully reversed these changes, indicating that while perinatal VDD transiently enhances BAT thermogenic activity during early life, it does not produce lasting effects into adulthood.
Modularity and Integration Ana Paula Assis, Bárbara M.A. Costa, Daniela M. Rossoni, Diogo Melo, Gabriel Marroig Encyclopedia of Evolutionary Biology, 2025
Hepatic noradrenergic innervation acts via CREB/CRTC2 to activate gluconeogenesis during cold Henrique J.N. Morgan, Heitor B.P. Delfino, Aline Z. Schavinski, Samuel A. Malone, Camille Charoy, Natany G. Reis, Ana P. Assis, Natalia Lautherbach, Wilian A. Silveira, Lilian C. Heck, Dan Guton, Ana I. Domingos, Isis C. Kettelhut, Marc Montminy, Luiz C.C. Navegantes Metabolism Clinical and Experimental, 2024
Maternal Vitamin D Deficiency Impairs the Development of β Cells in Offspring Rats in a Sex-Dependent Manner Aline Z. Schavinski, Natany G. Reis, Henrique J. N. Morgan, Ana Paula Assis, Matheus L. Moro, Rafael R. Valentim, Ana Carolina Seni-Silva, Ester S. Ramos, Isis C. Kettelhut, Luiz C. C. Navegantes International Journal of Molecular Sciences, 2024 Recent studies have shown that maternal vitamin D deficiency (VDD) causes long-term metabolic changes in offspring. However, little is known about the impact of maternal VDD on offspring endocrine pancreas development and insulin secretion in the adult life of male and female animals. Female rats (Wistar Hannover) were fed either control (1000 IU Vitamin D3/kg), VDD (0 IU Vitamin D3/kg), or a Ca2+-enriched VDD diet (0 IU Vitamin D3/kg + Ca2+ and P/kg) for 6 weeks and during gestation and lactation. At weaning, VDD status was confirmed based on low serum calcidiol levels in dams and pups. Next, male and female offspring were randomly separated and fed a standard diet for up to 90 days. At this age, serum calcidiol levels were restored to normal levels in all groups, but serum insulin levels were decreased in VDD males without affecting glucagon levels, glycemia, or glucose tolerance. Islets isolated from VDD males showed lower insulin secretion in response to different glucose concentrations, but this effect was not observed in VDD females. Furthermore, VDD males, but not females, showed a smaller total pancreatic islet area and lower β cell mass, an effect that was accompanied by reduced gene expression of Ins1, Ins2, Pdx1, and SLC2A2. The decrease in Pdx1 expression was not related to the methylation profile of the promoter region of this gene. Most of these effects were observed in the male VDD+Ca2+ group, indicating that the effects were not due to alterations in Ca2+ metabolism. These data show that maternal VDD selectively impairs the morphology and function of β cells in adult male offspring rats and that female offspring are fully protected from these deleterious effects.
Coevolution Flávia M.D. Marquitti, Ana P.A. Assis Encyclopedia of Biodiversity Third Edition Volume 1 7, 2024
Network science: Applications for sustainable agroecosystems and food security Fredric M. Windsor, Dolors Armenteras, Ana Paula A. Assis, Julia Astegiano, Pamela C. Santana, Luciano Cagnolo, Luísa G. Carvalheiro, Clive Emary, Hugo Fort, Xavier I. Gonzalez, James J.N. Kitson, Ana C.F. Lacerda, Marcelo Lois, Viviana Márquez-Velásquez, Kirsten E. Miller, Marcos Monasterolo, Marina Omacini, Kate P. Maia, Tania Paula Palacios, Michael J.O. Pocock, Santiago L. Poggio, Isabela G. Varassin, Diego P. Vázquez, Julia Tavella, Débora C. Rother, Mariano Devoto, Paulo R. Guimarães, Darren M. Evans Perspectives in Ecology and Conservation, 2022
Integrating Computational Methods to Investigate the Macroecology of Microbiomes Rilquer Mascarenhas, Flávia M. Ruziska, Eduardo Freitas Moreira, Amanda B. Campos, Miguel Loiola, Kaike Reis, Amaro E. Trindade-Silva, Felipe A. S. Barbosa, Lucas Salles, Rafael Menezes, Rafael Veiga, Felipe H. Coutinho, Bas E. Dutilh, Paulo R. Guimarães, Ana Paula A. Assis, Anderson Ara, José G. V. Miranda, Roberto F. S. Andrade, Bruno Vilela, Pedro Milet Meirelles Frontiers in Genetics, 2020
Morphological variability as a buffer against extinction: insights from Hawaiian honeycreepers I Birskis-Barros, APA Assis, H James, SL Kim, JD Yeakel Proceedings of the Royal Society B: Biological Sciences 293 (2068) , 2026 2026
Rare Phyla, Such as CPR and DPANN, Shape Ecosystem-Level Microbial Community Structure Dissimilarities CM Ferreira, DB de Affonseca, FAS Barbosa, AB Campos, R Menezes, ... Microbial Ecology 88 (1), 135 , 2025 2025 Citations: 1
Is the audience gender-blind? Smaller attendance in female talks highlights an imbalanced visibility in academia JR Barreto, I Romitelli, PC Santana, APA Assis, R Pardini, MS Leite npj Biodiversity 4 (1), 28 , 2025 2025 Citations: 5
Coevolution FMD Marquitti, APA Assis Academic Press , 2024 2024
Indirect effects shape species fitness in coevolved mutualistic networks LG Cosmo, APA Assis, MAM de Aguiar, MM Pires, A Valido, P Jordano, ... Nature 619 (7971), 788-792 , 2023 2023 Citations: 37
Reduced evolutionary potential of a frugivorous bird species in fragmented forests APA Assis, M Galetti, KP Maia, PR Guimarães Jr Frontiers in Ecology and Evolution 10, 804138 , 2022 2022 Citations: 4
Organisms as Complex Structures Wrapped in a Complex Web of Life APA Assis, PR Guimarães Jr The American Naturalist 199 (6), 804-807 , 2022 2022 Citations: 3
Morphological integration and cranial modularity in six genera of echimyid rodents (Rodentia: Echimyidae) C Raidan, BM de Andrade Costa, G Marroig, AP Aprígio Assis, ... Journal of Mammalogy 103 (3), 648-662 , 2022 2022 Citations: 2
Network science: Applications for sustainable agroecosystems and food security FM Windsor, D Armenteras, APA Assis, J Astegiano, PC Santana, ... Perspectives in Ecology and Conservation 20 (2), 79-90 , 2022 2022 Citations: 34
Trophic rewilding benefits a tropical community through direct and indirect network effects P Mittelman, AR Landim, L Genes, APA Assis, C Starling‐Manne, ... Ecography 2022 (4) , 2022 2022 Citations: 24
Genetic correlations and ecological networks shape coevolving mutualisms APA Assis, JN Thompson, PC Santana, P Jordano, J Bascompte, ... Ecology letters 23 (12), 1789-1799 , 2020 2020 Citations: 24
Vulnerabilidade estrutural dos hospitais e cemitérios e crematórios da cidade de São Paulo à COVID-19 MP Gaiarsa, FMD Marquitti, P Lemos-Costa, G Burin, LP Medeiros, ... SciELO Preprints , 2020 2020
Vulnerabilidade das microrregiões da Região Sul do Brasil à pandemia do novo coronavírus (SARS-CoV-2) C Emer, KP Maia, PC Santana, EM Santana, LG Cosmo, APA Assis, ... 2020 Citations: 5
Vulnerabilidade das microrregiões do Nordeste brasileiro à pandemia do novo coronavírus (SARS-CoV-2) R Raimundo, K Maia, D Muniz, M Cantor, P Guimaraes, P Lemos-Costa, ... 2020 Citations: 2
Integrating computational methods to investigate the macroecology of microbiomes R Mascarenhas, FM Ruziska, EF Moreira, AB Campos, M Loiola, K Reis, ... Frontiers in genetics 10, 1344 , 2020 2020 Citations: 14
Vulnerability of micro-regions within Northeast Brazil to the new coronavirus (SARS-CoV-2) pandemic R Raimundo, K Maia, D Muniz, M Cantor, P Guimaraes Jr, P Lemos-Costa, ... Vulnerability of micro-regions within Northeast Brazil to the new … , 2020 2020
Structural vulnerability of hospitals, cemeteries, and crematoriums of the city of São Paulo to COVID-19 MP Gaiarsa, FMD Marquitti, P Lemos-Costa, G Burin, LP Medeiros, ... Structural vulnerability of hospitals, cemeteries, and crematoriums of the … , 2020 2020
Vulnerability of the micro-regions of the South of Brazil to the new coronavirus (SARS-CoV-2) pandemic C Emer, KP Maia, PC Santana, EM Santana, DGM da Silva, LG Cosmo, ... Vulnerability of the micro-regions of the South of Brazil to the new … , 2020 2020
Low-load pathogen spillover predicts shifts in skin microbiome and survival of a terrestrial-breeding amphibian CG Becker, MC Bletz, SE Greenspan, D Rodriguez, C Lambertini, ... Proceedings of the Royal Society B: Biological Sciences 286 (1908) , 2019 2019 Citations: 41
The Evolution of Phenotypic and Genetic Integration: Field and Laboratory Experiments G Marroig, D Melo, A Penna, APA Assis JOURNAL OF MORPHOLOGY 280, S15-S15 , 2019 2019
MOST CITED SCHOLAR PUBLICATIONS
EvolQG-An R package for evolutionary quantitative genetics D Melo, G Garcia, A Hubbe, AP Assis, G Marroig F1000Research 4, 925 , 2016 2016 Citations: 139
Intense natural selection preceded the invasion of new adaptive zones during the radiation of New World leaf-nosed bats DM Rossoni, APA Assis, NP Giannini, G Marroig Scientific Reports 7 (1), 11076 , 2017 2017 Citations: 75
Morphological and dietary responses of chipmunks to a century of climate change RE Walsh, AP Aprigio Assis, JL Patton, G Marroig, TE Dawson, EA Lacey Global change biology 22 (9), 3233-3252 , 2016 2016 Citations: 51
Low-load pathogen spillover predicts shifts in skin microbiome and survival of a terrestrial-breeding amphibian CG Becker, MC Bletz, SE Greenspan, D Rodriguez, C Lambertini, ... Proceedings of the Royal Society B: Biological Sciences 286 (1908) , 2019 2019 Citations: 41
Directional selection effects on patterns of phenotypic (co) variation in wild populations APA Assis, JL Patton, A Hubbe, G Marroig Proceedings of the Royal Society B: Biological Sciences 283 (1843) , 2016 2016 Citations: 40
Indirect effects shape species fitness in coevolved mutualistic networks LG Cosmo, APA Assis, MAM de Aguiar, MM Pires, A Valido, P Jordano, ... Nature 619 (7971), 788-792 , 2023 2023 Citations: 37
Network science: Applications for sustainable agroecosystems and food security FM Windsor, D Armenteras, APA Assis, J Astegiano, PC Santana, ... Perspectives in Ecology and Conservation 20 (2), 79-90 , 2022 2022 Citations: 34
Trophic rewilding benefits a tropical community through direct and indirect network effects P Mittelman, AR Landim, L Genes, APA Assis, C Starling‐Manne, ... Ecography 2022 (4) , 2022 2022 Citations: 24
Genetic correlations and ecological networks shape coevolving mutualisms APA Assis, JN Thompson, PC Santana, P Jordano, J Bascompte, ... Ecology letters 23 (12), 1789-1799 , 2020 2020 Citations: 24
Evolutionary processes and its environmental correlates in the cranial morphology of western chipmunks ( Tamias ) APA Assis, DM Rossoni, JL Patton, G Marroig Evolution 71 (3), 595-609 , 2017 2017 Citations: 20
Integrating computational methods to investigate the macroecology of microbiomes R Mascarenhas, FM Ruziska, EF Moreira, AB Campos, M Loiola, K Reis, ... Frontiers in genetics 10, 1344 , 2020 2020 Citations: 14
Is the audience gender-blind? Smaller attendance in female talks highlights an imbalanced visibility in academia JR Barreto, I Romitelli, PC Santana, APA Assis, R Pardini, MS Leite npj Biodiversity 4 (1), 28 , 2025 2025 Citations: 5
Vulnerabilidade das microrregiões da Região Sul do Brasil à pandemia do novo coronavírus (SARS-CoV-2) C Emer, KP Maia, PC Santana, EM Santana, LG Cosmo, APA Assis, ... 2020 Citations: 5
Modularity and Integration APA Assis, DM Rossoni, BMA Costa, D Melo, G Marroig Encyclopedia of Evolutionary Biology 3, 34-40 , 2016 2016 Citations: 5
Reduced evolutionary potential of a frugivorous bird species in fragmented forests APA Assis, M Galetti, KP Maia, PR Guimarães Jr Frontiers in Ecology and Evolution 10, 804138 , 2022 2022 Citations: 4
Organisms as Complex Structures Wrapped in a Complex Web of Life APA Assis, PR Guimarães Jr The American Naturalist 199 (6), 804-807 , 2022 2022 Citations: 3
Morphological integration and cranial modularity in six genera of echimyid rodents (Rodentia: Echimyidae) C Raidan, BM de Andrade Costa, G Marroig, AP Aprígio Assis, ... Journal of Mammalogy 103 (3), 648-662 , 2022 2022 Citations: 2
Vulnerabilidade das microrregiões do Nordeste brasileiro à pandemia do novo coronavírus (SARS-CoV-2) R Raimundo, K Maia, D Muniz, M Cantor, P Guimaraes, P Lemos-Costa, ... 2020 Citations: 2
Geographical variation and sexual dimorphism in cranial size and shape of Kannabateomys amblyonyx (Rodentia: Echimyidae) C Raidan, APA Assis, FA Silva, G Lessa, R Paresque Boletim da sociedade Brasileira de Mastozoologia 85, 31-39 , 2019 2019 Citations: 2
Seleção natural e mudanças climáticas na história evolutiva de esquilos (Sciuridae: Tamias) APA Assis Universidade de São Paulo , 2016 2016 Citations: 2