Biotropica最新文献_第3页

Population Size and Spatial Patterns of the Endangered Tree Gigasiphon macrosiphon in Tanzania 坦桑尼亚濒危树种巨虹吸的种群规模和空间格局

IF 1.7 3区环境科学与生态学

Biotropica Pub Date : 2026-02-11 DOI: 10.1111/btp.70171

Laura N. Munema, Richard A. Giliba, Ernest Mbega, Francis Moyo

{"title":"Population Size and Spatial Patterns of the Endangered Tree Gigasiphon macrosiphon in Tanzania","authors":"Laura N. Munema, Richard A. Giliba, Ernest Mbega, Francis Moyo","doi":"10.1111/btp.70171","DOIUrl":"https://doi.org/10.1111/btp.70171","url":null,"abstract":"<div>\u0000 \u0000 Gigasiphon macrosiphon (Harms) Brenan is a rare and endangered tree endemic to the coastal forests of Kenya and Tanzania. Yet, its population status and spatial ecology remain poorly documented, particularly in Tanzania. We quantified population size, growth-stage composition, and spatial patterns of G. macrosiphon in two forest reserves in southeastern Tanzania: Kwediboma Forest Reserve and Rondo Nature Forest Reserve. Individuals across all growth stages were systematically surveyed, with diameter measurements used to assess size-class structure and regeneration status, and spatial mapping used to evaluate patterns of aggregation. Rondo supported a substantially larger and more demographically continuous population, with abundant early growth stages indicating ongoing recruitment. In contrast, Kwediboma was dominated by intermediate and mature individuals, with limited representation of germinants and seedlings, suggesting constrained or episodic regeneration. Spatial analyses revealed strong clustering consistent with localized recruitment near parent trees, with broader spatial distribution and more extensive recruitment at Rondo than at Kwediboma. Together, these patterns indicate that G. macrosiphon populations are shaped by site-specific habitat conditions and regeneration processes, underscoring the need for targeted conservation strategies to maintain recruitment and long-term population persistence.\u0000 </div>","PeriodicalId":8982,"journal":{"name":"Biotropica","volume":"58 2","pages":""},"PeriodicalIF":1.7,"publicationDate":"2026-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147275047","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}

引用次数: 0

Diversity of Terrestrial Malacofauna, Favorable Habitats, and Relationships With Mollusk Size in Urban Environments of Sergipe, Northeastern Brazil 巴西东北部Sergipe城市环境中陆生软体动物多样性、有利生境及其与软体动物大小的关系

IF 1.7 3区环境科学与生态学

Biotropica Pub Date : 2026-02-11 DOI: 10.1111/btp.70170

Pedro D. Lima, José L. J. Santos, Allan C. Gomes, Rachel P. P. Carvalho, André M. Alves, Camenas V. Barata, Quezia M. S. Araújo, Tiago S. Santos, Luciane M. S. Melo, Suzete R. Gomes, Victor F. S. Lima, José R. S. Silva

{"title":"Diversity of Terrestrial Malacofauna, Favorable Habitats, and Relationships With Mollusk Size in Urban Environments of Sergipe, Northeastern Brazil","authors":"Pedro D. Lima, José L. J. Santos, Allan C. Gomes, Rachel P. P. Carvalho, André M. Alves, Camenas V. Barata, Quezia M. S. Araújo, Tiago S. Santos, Luciane M. S. Melo, Suzete R. Gomes, Victor F. S. Lima, José R. S. Silva","doi":"10.1111/btp.70170","DOIUrl":"https://doi.org/10.1111/btp.70170","url":null,"abstract":"Terrestrial mollusks can benefit significantly from favorable environmental conditions and the creation of new habitats, enabling them to establish and proliferate in urban environments. This study aimed to analyze the diversity of terrestrial mollusks during the dry and rainy seasons and across different types of urban environments in the city of Aracaju, Sergipe, assessing their most favorable habitats as well as the size of the animals in these locations. Active searches were conducted during two climatic periods in standardized plots of 20 m × 10 m (20 min/two collectors), encompassing three habitat types (urban park, back garden, vacant lot) located in the neighborhoods of Atalaia, Farolândia, Jardins, and Santa Maria. A total of 957 live mollusks were collected, belonging to 8 families and comprising 11 distinct species. Achatina fulica (39.06%) and Subulina octona (19.80%) were classified as eudominant species. The highest abundance was recorded during the rainy period (67.9%; p < 0.001), whereas the opposite pattern was observed in the Santa Maria neighborhood (57.8%; p < 0.001). Back gardens (H′ = 1.64; S = 8) and vacant lots (H′ = 1.48; S = 7) showed similar diversity and richness, both being favorable habitats for mollusks. A. fulica exhibited larger shell size and weight in back gardens, whereas other snails displayed greater dimensions in the urban park (p < 0.05). Understanding these factors will contribute to the conservation of local biodiversity and to the control of invasive or epidemiologically relevant species.","PeriodicalId":8982,"journal":{"name":"Biotropica","volume":"58 2","pages":""},"PeriodicalIF":1.7,"publicationDate":"2026-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/btp.70170","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147275048","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}

引用次数: 0

Historical Fortresses as Hot Roosts for Bats in Urban Environments of the Colombian Caribbean 哥伦比亚加勒比海地区城市环境中的历史堡垒是蝙蝠的热窝

IF 1.7 3区环境科学与生态学

Biotropica Pub Date : 2026-02-10 DOI: 10.1111/btp.70175

Aída Otálora-Ardila, Selene Hernandez-Muñoz, Juliana Margarita Gómez, María Camila Valdés-Cardona, Camila A. Díaz-B, Hugo F. López-Arévalo, Olga L. Montenegro, Fábio Z. Farneda, Carolina Gómez-Posada

引用次数: 0

When Calves Get Vulnerable, Ocelots (Leopardus pardalis) Get Bold: A Camera Trap Record of Opportunistic Foraging in a Fragmented Landscape 当幼崽变得脆弱时，豹猫（豹子）变得大胆：相机陷阱记录了在破碎的景观中机会主义的觅食

IF 1.7 3区环境科学与生态学

Biotropica Pub Date : 2026-02-09 DOI: 10.1111/btp.70168

Álvaro Augusto Naves Silva, Vinícius da Fontoura Sperandei, Cássio Cardoso Pereira

引用次数: 0

Soil Properties and Plant Species Identity Independently Influence Arbuscular Mycorrhizal Fungal Composition Across Lowland Tropical Forests 土壤性质和植物物种特性独立影响热带低地森林丛枝菌根真菌组成

IF 1.7 3区环境科学与生态学

Biotropica Pub Date : 2026-02-04 DOI: 10.1111/btp.70164

Mareli Sánchez-Juliá, Blaine D. Martin, Iker R. Yturralde, Sunshine A. Van Bael

{"title":"Soil Properties and Plant Species Identity Independently Influence Arbuscular Mycorrhizal Fungal Composition Across Lowland Tropical Forests","authors":"Mareli Sánchez-Juliá, Blaine D. Martin, Iker R. Yturralde, Sunshine A. Van Bael","doi":"10.1111/btp.70164","DOIUrl":"https://doi.org/10.1111/btp.70164","url":null,"abstract":"Plant species distributions are strongly influenced by soil nutrient availability in tropical forests. Yet, the relative importance of abiotic and biotic factors underlying the composition of pervasive fungal symbionts of plants, arbuscular mycorrhizal fungi (AMF), remains unresolved in lowland tropical forests. Utilizing a long-term plot network in central Panama with mapped soil properties and tree species distributions, we aimed to understand the relative contribution of soil properties, geographic distance, root traits, and plant species identity in determining AMF community composition. We further asked how plant-fungal networks vary between sites with contrasting soil phosphorus (P) availability. We sampled fine roots for molecular identification of AMF communities from 140 trees representing 26 species with varied distributions across the soil nutrient availability gradient. We found that plant species identity and soil properties, especially soil P availability and dry-season moisture deficit, independently structured AMF community composition. Taxonomic turnover and a large number of indicator taxa across a soil P availability gradient provide further evidence for the strong abiotic and biotic structuring of AMF communities. Moreover, a significantly nested plant–AMF network in the low-P site points to a role of soil nutrient availability in mediating plant–AMF interactions. Our results lay the foundation for future studies to uncover the functional consequences of this symbiosis for plant distributions and ecosystem function in tropical forests.","PeriodicalId":8982,"journal":{"name":"Biotropica","volume":"58 2","pages":""},"PeriodicalIF":1.7,"publicationDate":"2026-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/btp.70164","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146162403","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}

引用次数: 0

Do Energetic Challenges Mimicking Missed Foraging Encourage Torpor Use by a Neotropical Bat? 模拟错过觅食的能量挑战会鼓励新热带蝙蝠使用冬眠吗？

IF 1.7 3区环境科学与生态学

Biotropica Pub Date : 2026-02-04 DOI: 10.1111/btp.70163

Zenon J. Czenze, Stuart Parsons, R. Mark Brigham

{"title":"Do Energetic Challenges Mimicking Missed Foraging Encourage Torpor Use by a Neotropical Bat?","authors":"Zenon J. Czenze, Stuart Parsons, R. Mark Brigham","doi":"10.1111/btp.70163","DOIUrl":"https://doi.org/10.1111/btp.70163","url":null,"abstract":"Endotherms balance high and stable body temperatures against significant energetic costs and food demands. Heterothermy, including torpor, helps individuals balance energy budgets under challenging conditions. Small flying endotherms face considerable challenges when balancing energy budgets during periods of inclement weather with low food availability. Although there is a wealth of knowledge about heterothermic responses of temperate insectivorous bats, considerably less is known about its occurrence and the factors that promote it in nectar-feeding bats from tropical regions. Here, we experimentally tested whether Merriam's long-tongued bat (Glossophaga mutica), a Neotropical nectarivorous species, uses heterothermy in response to reduced energy intake. Using temperature sensitive PIT-tags, we monitored subcutaneous temperature in wild-caught males fed either the full (100%) or restricted (25%) amount of predicted daily energy expenditure. Compared to bats that were fed a full energy diet, energetically challenged bats maintained subcutaneous temperatures significantly closer to roost temperature during the daytime inactive period, indicating a greater heterothermic response. Our results provide further evidence that G. mutica can flexibly modulate body temperature in response to short-term energy deficits. This is similar to patterns observed in other nectarivorous bats, insectivorous bats, and nectar-feeding birds like hummingbirds. This study contributes to a growing understanding of heterothermy in tropical mammals and suggests that nectarivorous bats use heterothermy as an adaptive response to unpredictable food availability likely driven in part by climate change.","PeriodicalId":8982,"journal":{"name":"Biotropica","volume":"58 2","pages":""},"PeriodicalIF":1.7,"publicationDate":"2026-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/btp.70163","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146139245","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}

引用次数: 0

Patterns of Composition, Richness and Endemicity of Cyperaceae Across Open and Closed Habitats in Madagascar's Central Highlands 马达加斯加中部高地开放和封闭生境中苏科植物的组成、丰富度和特有性格局

IF 1.7 3区环境科学与生态学

Biotropica Pub Date : 2026-02-03 DOI: 10.1111/btp.70160

Fitiavana Rasaminirina, Jakub D. Wieczorkowski, Vonjison Rakotoarimanana, Valisoa Louisicaël Rafaralahy, Nivohenintsoa Rakotonirina, Hélène Ralimanana, Isabel Larridon

{"title":"Patterns of Composition, Richness and Endemicity of Cyperaceae Across Open and Closed Habitats in Madagascar's Central Highlands","authors":"Fitiavana Rasaminirina, Jakub D. Wieczorkowski, Vonjison Rakotoarimanana, Valisoa Louisicaël Rafaralahy, Nivohenintsoa Rakotonirina, Hélène Ralimanana, Isabel Larridon","doi":"10.1111/btp.70160","DOIUrl":"https://doi.org/10.1111/btp.70160","url":null,"abstract":"The Cyperaceae family, with over 5,600 species, is a major component of open ecosystems worldwide. In Madagascar, where open grassy ecosystems dominate, the family remains understudied. We assessed Cyperaceae species composition, richness and endemicity across closed (forest), dry open (dry grasslands, rocky outcrops, bare dry soils), and wet open (marshes, swamps, wet grasslands, riparian areas) habitats in Isalo National Park and the Itremo Massif Protected Area, both in Madagascar's Central Highlands. Fieldwork spanned 40 days during which Cyperaceae specimens were collected along survey routes. Soil samples were collected from 20 habitats (5 closed, 6 wet open, and 9 dry open) and analysed for pH, nitrogen, soil organic carbon, potassium and phosphorus to evaluate their influence on species composition via co-inertia analysis. We recorded 108 species across 12 genera, 28 of which are endemic to the island. The highest richness and number of endemics were found in the dry open habitat (72 species, 20 endemics), followed by the wet open (60 species, 7 endemics). Closed habitat had the lowest number (14 species) but a higher endemism rate, with 7 endemic species. Species composition was most similar between wet open and dry open habitats (βSOR = 0.5), and least similar between closed and dry open habitats (βSOR = 0.91). Soil characteristics did not differ significantly among habitats, except for potassium, and they did not affect species composition. The results highlight the importance of the Central Highlands for Cyperaceae, as they are home to at least a third of native Cyperaceae species in Madagascar.","PeriodicalId":8982,"journal":{"name":"Biotropica","volume":"58 2","pages":""},"PeriodicalIF":1.7,"publicationDate":"2026-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/btp.70160","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146162292","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}

引用次数: 0

Snakes on Trains: Railways May Sway Goa's King Cobra Distribution 火车上的蛇：铁路可能会影响果阿的眼镜王蛇分布

IF 1.7 3区环境科学与生态学

Biotropica Pub Date : 2026-01-26 DOI: 10.1111/btp.70157

Dikansh S. Parmar, Dennis Rödder, Amrut Singh, Rinku Gupta, Hinrich Kaiser

{"title":"Snakes on Trains: Railways May Sway Goa's King Cobra Distribution","authors":"Dikansh S. Parmar, Dennis Rödder, Amrut Singh, Rinku Gupta, Hinrich Kaiser","doi":"10.1111/btp.70157","DOIUrl":"https://doi.org/10.1111/btp.70157","url":null,"abstract":"We provide the first detailed documentation on the distribution and natural history of the Western Ghats King Cobra, Ophiophagus kaalinga, in Goa State, India, and its interesting apparent interaction with railway infrastructure, which may influence its distribution. The combination of rescue records, verified sightings, local reports, and historical data allowed us to document a total of 47 georeferenced localities where O. kaalinga has been found in the state, with 18 localities in North Goa District and 29 in South Goa District. These data inform our study of the Goa Gap, a biologically significant region without obvious physical characteristics, and assess the suitability of this area for king cobras. Using a series of climate and vegetation variables, we were able to model the potential distribution of the species in Goa. It is noteworthy that the five king cobra records that fall along busy railway corridors had the lowest predicted probability, as predicted by our model. Combined with recent reports of snakes on trains in India and of O. kaalinga in a rail yard, entirely unsuitable reptile habitats, we propose the hypothesis that snakes, king cobras included, may inadvertently expand their ranges by accidental transport on trains.","PeriodicalId":8982,"journal":{"name":"Biotropica","volume":"58 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2026-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/btp.70157","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146136583","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}

引用次数: 0

Habitat Amount Shapes Ant Diversity in the Central Amazon 亚马逊中部栖息地数量影响蚂蚁多样性

IF 1.7 3区环境科学与生态学

Biotropica Pub Date : 2026-01-23 DOI: 10.1111/btp.70159

Ricardo A. S. Ruaro, Lucas F. Colares, Heraldo L. Vasconcelos, Fabricio B. Baccaro

{"title":"Habitat Amount Shapes Ant Diversity in the Central Amazon","authors":"Ricardo A. S. Ruaro, Lucas F. Colares, Heraldo L. Vasconcelos, Fabricio B. Baccaro","doi":"10.1111/btp.70159","DOIUrl":"https://doi.org/10.1111/btp.70159","url":null,"abstract":"Studies on habitat fragmentation often evaluate how habitat amount and isolation influence species richness at the local scale, mainly following the Island Biogeography Theory (IBT) framework. Alternatively, the Habitat Amount Hypothesis (HAH) proposes a unifying framework, suggesting that species richness is primarily determined by the total amount of habitat in the landscape rather than by fragment size and isolation per se. We tested this hypothesis using historical data on ant assemblages collected in the experimental area of the Biological Dynamics of Forest Fragments Project (BDFFP) in Central Amazon. Ants were sampled in nine fragments, which varied in size (from 1 to 100 ha) and in the amount of forest in the surrounding landscape. Our results indicate that the amount of forest habitat in the landscape influences species diversity in the fragments, especially among forest specialist species. Additionally, we found that the observed changes in ant species composition between fragments were also associated with differences in landscape forest cover, independently of fragment size. These findings highlight the critical role of habitat availability in shaping ant assemblages and the importance of multi-scale approaches in conservation strategies, particularly in highly diverse and increasingly threatened ecosystems such as the Amazon Forest.","PeriodicalId":8982,"journal":{"name":"Biotropica","volume":"58 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2026-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/btp.70159","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146091501","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}

引用次数: 0

Impacts of Climate Change on the Movement Ecology of an Imperfect Homeotherm 气候变化对不完全恒温动物运动生态学的影响

IF 1.7 3区环境科学与生态学

Biotropica Pub Date : 2026-01-23 DOI: 10.1111/btp.70161

Michael J. Noonan, Jesse M. Alston, Aline Giroux, Arnaud L. J. Desbiez

{"title":"Impacts of Climate Change on the Movement Ecology of an Imperfect Homeotherm","authors":"Michael J. Noonan, Jesse M. Alston, Aline Giroux, Arnaud L. J. Desbiez","doi":"10.1111/btp.70161","DOIUrl":"https://doi.org/10.1111/btp.70161","url":null,"abstract":"Rapid, human-induced climate change has posed significant challenges to wildlife. One key strategy animals use to cope with environmental temperature fluctuations is behavioral thermoregulation. Understanding how climate change is expected to influence animal behavior is crucial for assessing its impact on species survival and informing effective conservation efforts. Giant anteaters have been found to exhibit conspicuous behavioral responses to temperature changes. Despite their broad thermal neutral zone (15°C–36°C), climate projections indicate that this species is increasingly likely to experience heat stress. We used GPS tracking and continuous-time analyses to investigate how environmental temperature influences the movement ecology of giant anteaters. We integrated our findings with climate change projections to link giant anteater's responses to present weather conditions with those expected under future climate scenarios. Giant anteaters' movement speed exhibited a negative quadratic response to temperature, peaking at 23.7°C. 95% of their movement occurred between 15.0°C and 32.3°C, which aligns with their thermal neutral zone. The increasing temperature led giant anteaters to increase selection for native forests, but had no effect on selection for exotic tree plantations. This shows the importance of native forests as these thermal shelters help to mitigate the negative consequences of high temperatures on anteater's movement. However, the warmer temperatures predicted for Brazil throughout the rest of the 21st century indicate that giant anteaters may experience a reduction of up to 84% in their movement speed. This would hinder the acquisition of sufficient energy resources and threaten the species' persistence. We emphasize the need for conservation efforts that account for the impacts of climate change on species survival and stress the importance of preserving forests as essential refuges that help wildlife to cope with rising temperatures.","PeriodicalId":8982,"journal":{"name":"Biotropica","volume":"58 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2026-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/btp.70161","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146091500","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}

引用次数: 0