Biotropica最新文献

{"title":"Integrating Diverse Approaches, Actors, and Local Knowledge: Lessons From the 61st ATBC Meeting","authors":"Miguel Martínez-Ramos,&nbsp;Iván A. Ortíz-Rodríguez,&nbsp;Mariana Soto-Rueda,&nbsp;Ellen Andresen,&nbsp;Martha Bonilla-Moheno,&nbsp;Karina Boege,&nbsp;Víctor Arroyo-Rodríguez,&nbsp;Quetzalcóalt Orozco-Ramírez,&nbsp;Ek del Val,&nbsp;Daniel Auliz-Ortíz,&nbsp;Susana Alejandre-Ortíz,&nbsp;Gladys I. Manzanero-Medina,&nbsp;Marco A. Vásquez-Dávila,&nbsp;Lúcia G. Lohmann","doi":"10.1111/btp.70288","DOIUrl":"https://doi.org/10.1111/btp.70288","url":null,"abstract":"<p>Annual meetings of the Association for Tropical Biology and Conservation (ATBC) provide a window into emerging research priorities, conceptual shifts, and methodological advances in tropical biology and conservation. Here, we synthesize lessons and outcomes from the 61st ATBC Annual Meeting (ATBC 2025) held in Oaxaca, México, and situate them within the broader trajectory of ATBC conferences to identify continuities, emerging directions, and gaps. ATBC 2025 convened 1161 participants from 63 countries, providing a timely platform to examine how research in tropical biology and conservation is responding to accelerating socioecological change. Analyses of symposia, oral and poster presentations, and plenary sessions revealed three overarching messages. First, compound disturbances—such as interactions between land-use change and climate extremes—are increasingly reshaping tropical ecosystems and require integrative research and management approaches. Second, effective conservation and restoration depend on equity-centered frameworks that meaningfully engage Indigenous Peoples and local communities through collaborative governance and coproduced knowledge. Third, rapid methodological innovation—from microbiome studies to artificial intelligence and remote sensing—continues to expand analytical capacity, although its transformative potential depends upon socially grounded and place-based contexts. The meeting also highlighted science–action linkages, exemplified by the “Declaration on the Social–Ecological Impacts of Agave Monocultures for Mezcal Production” and ATBC's carbon offset initiative developed with CORENCHI, a community-led civil association conserving tropical cloud forests in Oaxaca. Although challenges remain, ATBC 2025 illustrated the evolving role of ATBC conferences as platforms for integrative, action-oriented science to advance conservation and sustainability in the tropics.</p>","PeriodicalId":8982,"journal":{"name":"Biotropica","volume":"58 6","pages":""},"PeriodicalIF":1.9,"publicationDate":"2026-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/btp.70288","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149258451","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Flower Visitation, Floral Traits, and Reproduction of Nicotiana glauca (Solanaceae) in an Urban Landscape","authors":"Francisco Maldonado Vargas,&nbsp;Mónica Moraes R,&nbsp;Sissi Lozada-Gobilard","doi":"10.1111/btp.70290","DOIUrl":"https://doi.org/10.1111/btp.70290","url":null,"abstract":"<p>Urban environments can generate substantial spatial and temporal variation in pollinator assemblages, floral traits, and resource availability, yet how plant reproduction is maintained under such heterogeneous conditions remains poorly understood, particularly in tropical cities. In <i>Nicotiana glauca</i> (Solanaceae), floral traits and pollinator assemblages vary among natural populations, but information from urban environments is lacking. We investigated pollination dynamics and reproductive success of <i>N. glauca</i> across a heterogeneous urban landscape in the high tropical Andes by integrating flower visitation, floral trait variation, functional morphology, and reproductive output. Flower visitation varied strongly among visitor groups, times of day, and urban regions. Hummingbirds were the only legitimate pollinators, whereas bees acted exclusively as nectar robbers. We report <i>Colibri coruscans</i> and <i>Elliotomyia chionogaster</i> as pollinators of <i>N. glauca</i> for the first time. Despite pronounced spatial and temporal variation in floral traits and visitor assemblages, including complete spatial turnover between hummingbird species, fruit set remained consistently high (&gt; 90%) across all urban regions. No fruits were produced in pollinator-excluded flowers, suggesting dependence on animal-mediated pollination. Although flower tube length generally exceeded hummingbird bill length, both species appeared functionally compatible with the flowers and carried pollen on their beaks during visitation. Our results show that <i>N. glauca</i> maintains high reproductive success across heterogeneous urban environments, through hummingbird-mediated pollination, highlighting the resilience of some plant–pollinator interactions in rapidly urbanizing tropical landscapes.</p>","PeriodicalId":8982,"journal":{"name":"Biotropica","volume":"58 6","pages":""},"PeriodicalIF":1.9,"publicationDate":"2026-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/btp.70290","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149258514","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Geographical Expansion and Native Species Displacement: The Invasion of Cecropia peltata L. (Urticaceae) in Cameroon","authors":"Claire Baudoux,&nbsp;Achille Biwolé,&nbsp;Bruce L. Webber,&nbsp;Patrick Heuret,&nbsp;Narcisse Guy Kamdem,&nbsp;Olivier J. Hardy","doi":"10.1111/btp.70260","DOIUrl":"https://doi.org/10.1111/btp.70260","url":null,"abstract":"<div>\u0000 \u0000 <p>Plant invasions pose a global ecological concern, yet their study in continental tropical Africa is limited. <i>Cecropia</i> (Urticaceae) is a genus of fast-growing Neotropical tree species, some of which have been introduced and become invasive in the paleotropics. In this study, we examined the invasion process of the <i>C. peltata</i> introduction in Cameroon, focusing on its geographical distribution, temporal dynamics, and potential impacts on the closely related native species <i>Musanga cecropioides</i>. After surveying 837 km of roads in 2018, we found that <i>C. peltata</i> was widely distributed across the Littoral and South-West regions, extending over an area of ca. 15,000 km² (ca. 3% of the total terrestrial area of Cameroon), where it often occupies recently disturbed vegetation. Its abundance decays with distance from the town of Limbe, supporting the hypothesis that the Limbe Botanical Garden was the point of introduction. This invasion represents an expansion of ca. 143 km eastwards and 110 km northwards over approximately 100 years, a mean rate of progression of ca. 1–3 km per year. <i>Cecropia peltata</i> seems to be replacing <i>M. cecropioides</i>, which showed a five-fold decrease in abundance between 1986 and 2018 along two road sections 20–60 km away from Limbe. Considering that environmental degradation can promote <i>C. peltata</i> establishment, ongoing human population growth and land use change in Cameroon may exacerbate the <i>C. peltata</i> invasion in the future. Consequently, further investigation is necessary to assess the ecological and socio-economic impacts of this invasion as part of considering management priorities.</p>\u0000 </div>","PeriodicalId":8982,"journal":{"name":"Biotropica","volume":"58 6","pages":""},"PeriodicalIF":1.9,"publicationDate":"2026-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149258188","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Can Tropical Agamid Lizards Physiologically Tolerate the Altered Thermal Mosaic of Urban Microhabitats?","authors":"Marwa Razak,&nbsp;Amanda Ben,&nbsp;Saumitra Dhere,&nbsp;Maria Thaker","doi":"10.1111/btp.70282","DOIUrl":"https://doi.org/10.1111/btp.70282","url":null,"abstract":"<div>\u0000 \u0000 <p>Urbanization and human-induced environmental changes create unique and unprecedented thermal landscapes, and understanding species responses to these changes has emerged as an increasingly important area of research. One major challenge in studying these responses is the spatial mismatch between the small scale at which organisms experience their environment and the broader scale at which climate data are typically collected. We use infrared thermography to quantify the fine scale microclimate in urban and rural habitats used by two tropical agamid lizards, <i>Calotes versicolor</i> and <i>Psammophilus dorsalis</i>, that differ in microhabitat preference. By combining field-based body temperatures and lab-based measures of upper and lower critical thermal limits (CT_max, CT_min) and preferences (<i>T</i>_pref), we assess how thermal heterogeneity of microhabitats influences the degree of thermoregulation (<i>k</i>) in these species. We find that thermal responses to urbanization are shaped by species-specific thermal traits and patterns of microhabitat use. Rural microhabitats of <i>P. dorsalis</i> were warmer and more thermally heterogeneous than urban areas, whereas urban microhabitats for <i>C. versicolor</i> were warmer than rural areas. Between the species, individuals in urban areas did not differ markedly in substrate temperature used or degree of thermoconformity. <i>Calotes versicolor</i> also exhibited broader thermal tolerance and preferred temperature ranges than <i>P. dorsalis</i>. Collectively, our results suggest that <i>P. dorsalis</i> may be more susceptible to the thermal constraints imposed by human-modified landscapes. Overall, we demonstrate the critical need to account for microclimatic conditions and species-specific thermal traits when determining how animals respond to changes in the thermal environment expected from climate change.</p>\u0000 </div>","PeriodicalId":8982,"journal":{"name":"Biotropica","volume":"58 6","pages":""},"PeriodicalIF":1.9,"publicationDate":"2026-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149258189","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Community Assembly Processes in Tropical Intertidal Rockpool Fishes","authors":"Saúl González-Murcia","doi":"10.1111/btp.70287","DOIUrl":"https://doi.org/10.1111/btp.70287","url":null,"abstract":"<p>Understanding the drivers of community assembly in extreme and dynamic environments, such as intertidal rockpools, requires the integrated assessment of environmental filtering, species traits, phylogeny, and species interactions. This study aimed to quantify the multi-faceted drivers of rockpool fish assemblage structure by examining: (a) the association with physical and structural pool attributes, (b) the influence of species functional traits and phylogenetic relatedness, (c) residual co-occurrence patterns suggestive of species interactions, and (d) temporal and spatial dynamics. The assemblage was dominated by a few resident species (e.g., <i>Bathygobius ramosus</i>, <i>Tomicodon zebra</i>), which comprised 72% of total abundance. Rockpool volume and substratum rugosity were the primary environmental drivers, explaining a substantial portion of the variation in abundance for most of the 15 species studied. While species' traits (e.g., body size, trophic level, water column position) were associated with ~28%–67% of the niche variation across environmental gradients, there was no significant phylogenetic signal in species responses. After accounting for these environmental, spatial, temporal, and trait-based factors, significant positive residual co-occurrences were prevalent, most notably a strong association between <i>B. ramosus</i> and <i>Abudefduf concolor</i> suggesting potential facilitative interactions or shared unmeasured niche axes. These findings demonstrate that the structure of intertidal rockpool fish assemblages is predominantly filtered by key structural habitat features. The lack of a phylogenetic signal and the prevalence of positive co-occurrences highlight that species-specific traits and potential facilitative interactions, rather than evolutionary history, are critical in shaping these dynamic communities.</p>","PeriodicalId":8982,"journal":{"name":"Biotropica","volume":"58 6","pages":""},"PeriodicalIF":1.9,"publicationDate":"2026-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/btp.70287","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149258156","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Multifunctionality Is Key to Understanding Diversity of Leaf Trichomes: A Case Study Using an Evolutionary Model Tree Species Metrosideros polymorpha","authors":"Gaku Amada,&nbsp;Kanehiro Kitayama,&nbsp;Yusuke Onoda","doi":"10.1111/btp.70285","DOIUrl":"https://doi.org/10.1111/btp.70285","url":null,"abstract":"<div>\u0000 \u0000 <p>Various plant species have leaf trichomes, and their amounts and forms can vary across environmental conditions. Several functions have been considered as adaptive roles of leaf trichomes; however, most of the previous studies focused on a single role in each environment for a given species. In the present review, we introduce the multifunctionality of leaf trichomes using an evolutionary model tree species <i>Metrosideros polymorpha</i> Gaud. (Myrtaceae), which exhibits the remarkable intraspecific variation in leaf trichomes (especially on the lower surface) across diverse environments in the Hawaii Islands. We examined three functions in relation to carbon gain and water conservation: diffusion resistance (Function I), enhancement of foliar water absorption (Function II), and defense against specialist gall makers (Function III). In dry alpine areas, the benefits of Functions I and II can contribute to increasing carbon gain, whereas the effect of Function III may be limited due to less insect abundance, which explains the high abundance of the heavily pubescent individuals. In dry, warm areas, Function I results in increasing water loss and decreasing carbon gain through overheating while Function III becomes significant to impede gall formation that increases drought stress, which explains the high abundance of thinly pubescent individuals. In wet areas, all three functions are not advantageous, which may explain the dominance of glabrous individuals. Overall, we suggest that leaf trichomes of <i>M. polymorpha</i> serve multiple functions depending on environmental conditions, and that the concept of multifunctionality is key to understanding the variations and ecological significance of leaf trichomes.</p>\u0000 </div>","PeriodicalId":8982,"journal":{"name":"Biotropica","volume":"58 6","pages":""},"PeriodicalIF":1.9,"publicationDate":"2026-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149258121","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A Hidden Dimension of Caribbean Reptile Ecology: First Documentation on Nesting Behavior in a Pholidoscelis Species","authors":"Julian Thibaudier,&nbsp;Adolphe O. Debrot,&nbsp;Erik M. Boman,&nbsp;Matthijs P. van den Burg","doi":"10.1111/btp.70281","DOIUrl":"https://doi.org/10.1111/btp.70281","url":null,"abstract":"<p>Our first assessment of <i>Pholidoscelis erythrocephalus</i> nesting behavior indicates this species creates complex communal nesting sites. Considering the novelty of our nesting data for a <i>Pholidoscelis</i> species, this new knowledge aids our understanding of the reproductive ecology, biodemographics, and conservation of this widely distributed genus.</p>","PeriodicalId":8982,"journal":{"name":"Biotropica","volume":"58 6","pages":""},"PeriodicalIF":1.9,"publicationDate":"2026-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/btp.70281","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149205585","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Traveler's Palm (Ravenala spp.) Across Habitats and Its Responses to Disturbance in North-Eastern Madagascar","authors":"Yevgeniya Korol,&nbsp;Thio Rosin Fulgence,&nbsp;Rindrasoa Rajaonarimalala,&nbsp;Romual Randriamanantena,&nbsp;Florentine Romial,&nbsp;Dirk Hölscher","doi":"10.1111/btp.70279","DOIUrl":"https://doi.org/10.1111/btp.70279","url":null,"abstract":"<p>The genus <i>Ravenala</i> (Strelitziaceae) comprises six species of arborescent herbs endemic to Madagascar and iconic to this global biodiversity hotspot. We examined how <i>Ravenala</i> density responds to environmental gradients, land-use type, accessibility and canopy disturbance. The study was conducted in north-eastern Madagascar, a region heavily affected by deforestation in recent decades. We carried out species-specific terrestrial sampling in different land-use types (fallow land, vanilla agroforests and forest fragments) in human-modified landscapes and in old-growth forest. Visual detection in high-resolution satellite imagery extended observations of <i>Ravenala</i> at genus level across human-modified landscapes. Both, the terrestrial and the satellite-based approach indicated high but variable <i>Ravenala</i> densities. <i>Ravenala</i> density in human-modified landscapes increased with distance from settlements. The four encountered <i>Ravenala</i> species differed in response to disturbance and other factors. <i>R. grandis</i> and <i>R. menahirana</i> declined under higher disturbance levels, whereas <i>R. madagascariensis</i> increased in density with greater disturbance and reached highest densities in fallow land. In the old-growth forest, both <i>R. blancii</i>, which was recorded exclusively in the old-growth forest, and <i>R. menahirana</i> were less frequent in plots containing thicket-forming vegetation (bamboo and wild cardamom). Elevation responses diverged, with <i>R. blancii</i> increasing and <i>R. menahirana</i> decreasing in density at higher elevations. Divergent responses of different <i>Ravenala</i> species to habitat and disturbance suggest that reduction of human-induced canopy disturbance in human-modified landscapes and protection of old-growth forests are needed to safeguard all four encountered species.</p>","PeriodicalId":8982,"journal":{"name":"Biotropica","volume":"58 6","pages":""},"PeriodicalIF":1.9,"publicationDate":"2026-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/btp.70279","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149205931","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Distribution of Arboreal Acarofauna in Two Species of Tropical Trees","authors":"Maria A. Minor,&nbsp;Vladimir M. Salavatulin,&nbsp;Sergey G. Ermilov,&nbsp;Alexander A. Khaustov,&nbsp;Olga L. Makarova,&nbsp;Vladimir A. Khaustov,&nbsp;Alexey A. Kudrin,&nbsp;Duc Nguyen Trung","doi":"10.1111/btp.70278","DOIUrl":"https://doi.org/10.1111/btp.70278","url":null,"abstract":"<p>We investigated vertical stratification of mite communities (Oribatida, Mesostigmata, and Prostigmata) along tropical tree architecture in Cát Tiên National Park, Vietnam. We examined two phylogenetically unrelated but architecturally similar tree species, <i>Haldina cordifolia</i> and <i>Dipterocarpus alatus</i>; both are tall trees with straight cylindrical trunks, fissured bark, spreading crowns, and large leaves. To investigate potential interaction between sampling method and observed ecological patterns, we compared two methods—Tullgren–Berlese and substrate washing—for extraction of mites from tree bark. Across forest floor and arboreal samples, we identified 140 species of Oribatida, 70 species of Mesostigmata, and 57 species of Prostigmata. Numerically, arboreal acarofauna was dominated by Oribatida. Tree species identity did not influence total mite species richness, community composition of all Acari and Oribatida, or Oribatida abundance. Mesostigmata and Prostigmata were more abundant on <i>H. cordifolia</i>. Microhabitat had a significant effect on the abundance of arboreal Mesostigmata and Prostigmata but not Oribatida, and on species richness and community composition of arboreal acarofauna, with certain species restricted to specific tree zones irrespective of tree species. Assemblages formed three clusters: communities of (i) soil, litter, and trunk base, (ii) bark on upper trunk, and (iii) canopy branches and leaves. Substrate washing yielded higher abundances of Oribatida and Prostigmata and a higher number of detected species than Tullgren–Berlese extraction, with each method capturing a different species assemblage. To avoid bias, a complementary combination of methods is recommended for comprehensive assessment of arboreal mite biodiversity.</p>","PeriodicalId":8982,"journal":{"name":"Biotropica","volume":"58 6","pages":""},"PeriodicalIF":1.9,"publicationDate":"2026-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/btp.70278","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149205593","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Thermal Limits and Sensitivity of Brosimum rubescens Taub. (Moraceae): Implications for Monodominance in a Warming Climate","authors":"Igor Araújo,&nbsp;Simone Matias Reis,&nbsp;Carla H. L. Oliveira,&nbsp;Ediméia Laura Souza da Silva,&nbsp;Ludimila R. Almeida,&nbsp;Daiane Barbosa da Silva,&nbsp;Ben Hur Marimon Junior,&nbsp;Beatriz S. Marimon","doi":"10.1111/btp.70284","DOIUrl":"https://doi.org/10.1111/btp.70284","url":null,"abstract":"<div>\u0000 \u0000 <p>\u0000 \u0000 </p><ul>\u0000 \u0000 \u0000 <li>Understanding temperature tolerance is key to predicting tropical trees' responses to global warming. However, the thermal limits of monodominant tropical forests remain understudied, leaving their vulnerability to climate change unclear.</li>\u0000 \u0000 \u0000 <li>This study examined the thermal safety margin, tolerance parameters of PSII (<i>T</i>₅, <i>T</i>₅₀, <i>T</i>₉₅), leaf traits (e.g., leaf water mass content, leaf thickness, stomatal conductance), and temperatures of <i>Brosimum rubescens</i> Taub. (Moraceae) seedlings during the dry season in southern Amazonia, a rapidly warming and drying region.</li>\u0000 \u0000 \u0000 <li>We analyzed 60 seedlings and found that open-canopy conditions reduced thermal tolerance, with leaf temperatures surpassing <i>T</i>₅₀ in over 40% of seedlings under a 3°C warming scenario. The closed-canopy area exhibited more effective leaf cooling driven by trait plasticity; however, this cooling was not sufficient to maintain leaves within safe thermal limits. When temperatures exceeded 40°C, PSII performance declined sharply, particularly in the open-canopy area, resulting in reduced thermal safety margins.</li>\u0000 \u0000 \u0000 <li>Overall, our findings suggest that these effects may hinder the natural regeneration of <i>B. rubescens</i>, potentially affecting its role as a monodominant species and gradually influencing local dynamics and biodiversity in the long term, in response to warming and prolonged dry seasons in southern Amazonia.</li>\u0000 </ul>\u0000 \u0000 </div>","PeriodicalId":8982,"journal":{"name":"Biotropica","volume":"58 6","pages":""},"PeriodicalIF":1.9,"publicationDate":"2026-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149205656","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}