The breakdown of ecosystem functionality driven by deforestation in a global biodiversity hotspot

Biological Conservation, Год журнала: 2023, Номер 283, С. 110126 - 110126

Опубликована: Май 17, 2023

Язык: Английский

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The role of protected and unprotected forest remnants for mammal conservation in a megadiverse Neotropical hotspot

Biological Conservation, Год журнала: 2021, Номер 259, С. 109173 - 109173

Опубликована: Май 21, 2021

Язык: Английский

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The geography of diet variation in Neotropical Carnivora

Mammal Review, Год журнала: 2021, Номер 52(1), С. 112 - 128

Опубликована: Сен. 7, 2021

Abstract Mammalian carnivores (order Carnivora) perform important regulatory functions in terrestrial food webs. Building a comprehensive knowledge of the dietary patterns carnivorans and factors determining such is essential for improving our understanding role ecosystem functioning. In Neotropics, there are 64 extant species Carnivora, but information on their trophic ecology diffuse. We compiled analysed available quantitative data Neotropical carnivorans, aiming to detect intraspecific interspecific variation at large geographical scale. The resulting database encompasses interactions 37 native carnivoran from six families across 14 countries. There clear biases towards southern Brazil, Chile, Argentina, noticeable gap within Amazon. Also, most studies focused canids felids, especially Puma concolor , Panthera onca, Cerdocyon thous, Leopardus pardalis, Chrysocyon brachyurus, whereas 27 species, we found no information. consume least 651 genera vertebrates, invertebrates, plants. species‐specific marked differences between felids canids. Although predators generally exhibit high levels consistency diets regarding prey body mass, detected significant all study sites. Body mass imposes strong constraints use, biogeographical availability human influence may drive found. Overall, observed show not only similarities with resource‐use other continents, as nestedness driven by also differences, frugivory consumption invertebrates Assessing first step better processes underlying organisation interactions, imperative addressing impacts defaunation ecosystems informing conservation efforts.

Язык: Английский

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Functional diversity and trait filtering of insectivorous bats on forest islands created by an Amazonian mega dam

Functional Ecology, Год журнала: 2022, Номер 37(1), С. 99 - 111

Опубликована: Июнь 20, 2022

Abstract Mega dams in lowland tropical forests often create large archipelagos, leading to biodiversity decay and disruption of ecosystem functioning remnant habitat islands. We investigated the functional diversity trait filtering aerial insectivorous bats both insular forest patches created by a vast ~30‐year‐old hydropower reservoir adjacent mainland continuous Central Amazonia. Bats were surveyed using passive bat recorders across 34 sites. Based on set morphological traits derived for each species recorded, we estimated richness, evenness dispersion at site. further assessed effects local vegetation, patch landscape features patterns diversity. The interaction between traits, environmental characteristics, distribution was combination RLQ fourth‐corner analyses. found that sites retained higher richness lower compared islands, indicating more complete assemblage mainland. Additionally, composition affected vegetation structure area, with small isolated islands exhibiting pervasive loss traits. analyses showed larger understorey foraging greater dispersal capacity, constant frequency–frequency modulated calls, frequency maximum energy associated Conversely, subcanopy species, quasi‐constant calls presenting low capacity therefore sensitive insularization. Our study attention impacts induced bats. recommend future assessments fragmentation mammals should include linked services. In designing licensing new dams, suggest creation extensive protected areas surrounding minimize detrimental safeguard full complement key ecological functions provided Read free Plain Language Summary this article Journal blog.

Язык: Английский

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Disrupting a socio-ecological system: could traditional ecological knowledge be the key to preserving the Araucaria Forest in Brazil under climate change?

Climatic Change, Год журнала: 2023, Номер 176(2)

Опубликована: Янв. 16, 2023

Язык: Английский

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Mammal Diversity on Conservation Islands in Protected Areas in Oaxaca, Mexico

Diversity, Год журнала: 2025, Номер 17(1), С. 55 - 55

Опубликована: Янв. 16, 2025

Protected sites managed by indigenous people have been used for decades to conserve natural resources. These can be considered “conservation islands” and maintain high biodiversity. This study explores the diversity structure of medium large mammals in (1) four protected areas Oaxaca, Mexico, (2) two different conservation strategies: one area (PNA) three Voluntary Conservation Areas (VCAs). Data from 30 camera traps installed community monitoring between 2013 2019 were used. A total 29,304 days accumulated Central Valleys Western Mountains province. 60,725 photographic records analyzed, resulting 13,471 independent events. Twenty-four species wild documented, including endangered species. VCA showed higher richness compared PNA. Odocoileus virginianus was most dominant PNA, while Dicotyles angulatus VCA. We found differences strategies. Both strategies are effective maintaining mammal richness. consider that these serve as islands that, turn, inter-connect landscapes potential biological corridors.

Язык: Английский

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Taxonomic, functional, and phylogenetic diversity of aerial insectivorous bats decay on forest islands created by a mega Amazonian dam

Global Ecology and Conservation, Год журнала: 2025, Номер unknown, С. e03488 - e03488

Опубликована: Фев. 1, 2025

Язык: Английский

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Variation in mammal ecological patterns in response to seasonality in a Brazilian tropical dry forest

Mammalia, Год журнала: 2025, Номер unknown

Опубликована: Фев. 19, 2025

Abstract The scientific question addressed in this study is how mammals the Caatinga dry forest of northeast Brazil adapt to seasonal variations, specifically regarding their activity and occupancy patterns species richness composition. To investigate, we deployed camera traps across Furna Feia National Park during both wet seasons 2018. We utilized methods such as rarefaction curves, circular statistics, models analyze data collected from 44 40 sampling points seasons, respectively. obtained 485 records 11 mammal six orders nine families, including endangered like Leopardus tigrinus Herpailurus yagouaroundi . Notably, captured first photographic evidence a free-living Dicotyles tajacu Rio Grande do Norte state. Results indicate that some adjust avoid peak heat, particularly season, with no significant change but important changes relative abundance between seasons. Our research expects shed light on mammalian ecology seasonally environments, contributing management conservation efforts.

Язык: Английский

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Automated Detection of Araraucaria angustifolia (Bertol.) Kuntze in Urban Areas Using Google Earth Images and YOLOv7x

Remote Sensing, Год журнала: 2025, Номер 17(5), С. 809 - 809

Опубликована: Фев. 25, 2025

This study addresses the urgent need for effective methods to monitor and conserve Araucaria angustifolia, a critically endangered species of immense ecological cultural significance in southern Brazil. Using high-resolution satellite images from Google Earth, we apply YOLOv7x deep learning model detect this two distinct urban contexts Curitiba, Paraná: isolated trees across landscape A. angustifolia individuals within forest remnants. Data augmentation techniques, including image rotation, hue saturation adjustments, mosaic augmentation, were employed increase model’s accuracy robustness. Through 5-fold cross-validation, achieved mean Average Precision (AP) 90.79% an F1-score 88.68%. Results show higher detection remnants, where homogeneous background natural landscapes facilitated identification trees, compared areas complex visual elements like building shadows presented challenges. To reduce false positives, especially misclassifications involving palm species, additional annotations introduced, significantly enhancing performance environments. These findings highlight potential integrating remote sensing with automate large-scale inventories. Furthermore, highlights broader applicability forestry planning, offering cost-effective solution biodiversity monitoring. The integration predictive data maps reveals spatial correlation between density presence fragments, suggesting that preservation these is vital species’ sustainability. scalability also opens door future applications monitoring larger areas. As environments continue expand, understanding conserving key critical biodiversity, resilience, addressing climate change.

Язык: Английский

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Defaunation disrupts the behavior of large terrestrial vertebrates impacting ecological functions in the Amazon

Global Ecology and Conservation, Год журнала: 2025, Номер unknown, С. e03522 - e03522

Опубликована: Март 1, 2025

Язык: Английский

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