Drivers of functional diversity in small-bodied mammals across a deforestation frontier in the Southern Brazilian Amazon DOI Creative Commons
Manoel dos Santos Filho, Thalita Ribeiro, Dionei José da Silva

et al.

Research Square (Research Square), Journal Year: 2023, Volume and Issue: unknown

Published: Sept. 19, 2023

Abstract Deforestation remains the most pervasive driver of biodiversity erosion across tropical forests. Understanding on how species can cope with such habitat changes is particularly important along rapidly expanding agricultural frontiers. To do so, we used a functional perspective examining small mammal responses to loss, fragmentation, and degradation ‘Arc Deforestation’ in Southern Brazilian Amazon. Small mammals were surveyed using combination conventional pitfall traps 20 forest fragments — ranging from 42 4,743 ha addition two relatively continuous sites (> 7,000 ha). These lie isolated by cattle pasture matrix varying grazing intensity. We then analysed taxonomic diversity patterns represented Simpson Diversity Rao Quadratic entropy indices Generalised Linear Models containing local- landscape-scale predictors variation. Further, trait composition approach based community-weighted mean values depict predict variations this gradient. From total 847 individuals recorded belonging 24 taxa, tended follow diversity, both increasing fragment area. The dimension further was promoted low fire-related disturbance. Functional mainly driven quality, tree density, arthropod biomass, Our results reinforce that not only sustain depauperate assemblages, as those are likely have their ecosystem functioning disrupted. Accounting for quality allows boost persistence groups. findings be improve efficiency management practices thereby allowing maximise multiple dimensions associated services deforestation

Language: Английский

Foraging guild modulates insectivorous bat responses to habitat loss and insular fragmentation in peninsular Malaysia DOI
Quentin C.K. Hazard, Jérémy S. P. Froidevaux, Natalie Yoh

et al.

Biological Conservation, Journal Year: 2023, Volume and Issue: 281, P. 110017 - 110017

Published: March 22, 2023

Language: Английский

Citations

15
Beta‐diversity buffers fragmented landscapes against local species losses DOI Creative Commons
Cristian Dambros, Thiago J. Izzo, Luciene Castuera de Oliveira

et al.

Oikos, Journal Year: 2024, Volume and Issue: 2024(3)

Published: Jan. 24, 2024

Agricultural expansion has markedly reduced forests and reconfigured landscapes. These changes incur a well‐known detrimental impact on the biodiversity of local forest patches, but effects species persistence in entire landscapes comprised multiple patches are debated. Using data from ants collected Amazonian deforestation arc Brazil, we investigated how regional diversity is affected by habitat loss, fragmentation, cattle grazing, respond to both locally regionally. We also heterogeneity distribution (beta‐diversity) buffers against losses. used hierarchical multi‐species occupancy models estimate these while controlling for errors detection. The vast majority 251 ant found our study were negatively loss at drastically reducing compared continuous forests. Despite declines diversity, however, heavily fragmented could still retain most due high distribution. that beta‐diversity main component diversity. Results several studies suggest this maximized when remnant primary habitats landscape spread across areas. Although preserving may be important adequate functioning ecosystem locally, results indicate maintenance many small can buffer Our even remnants otherwise deforested collectively prevent regional‐scale extirpations, therefore merit conservation efforts.

Language: Английский

Citations

5
Disentangling the effects of habitat fragmentation and top-down trophic cascades on small mammal assemblages on Amazonian forest islands DOI Creative Commons
Ana Filipa Palmeirim, Maíra Benchimol, Marcus Vinícius Vieira

et al.

Biological Conservation, Journal Year: 2024, Volume and Issue: 293, P. 110594 - 110594

Published: April 23, 2024

Habitat loss and fragmentation are widely acknowledged to affect species diversity. However, the pathways through which their effects propagated foodwebs, ultimately driving diversity, less well understood. We investigated what extent of habitat on small mammals in Central Amazonia mediated by higher trophic levels, specifically mammal mesopredators apex predators. surveyed these three groups across 25 islands surrounded a landscape-scale gradient forest cover within Balbina Hydroelectric Reservoir, addition adjacent continuous sites. then applied Structural Equation Modelling based apex-predator incidence either abundance or biomass mammals. Apex-predator was positively affected landscape cover, as biomass. Small abundance, but not biomass, negatively cover. Contrary expectations, negative effect decrease mesopredator nor apex-predators. Instead, increase is apparently favoured proliferation few persisting smaller-bodied can take advantage augmented resources related degradation. The further increment absence lower predators might be prevented resource availability characterising evergreen forests. Mammal assemblages seem primarily regulated bottom-up forces. While this suggests delayed extinction debt Amazonian islands, remaining biodiversity poorly resilient additional disturbances.

Language: Английский

Citations

4
Taxonomic, functional, and phylogenetic diversity of aerial insectivorous bats decay on forest islands created by a mega Amazonian dam DOI Creative Commons
Paulo Estefano Dineli Bobrowiec, Raffaello Di Ponzio, Guthieri Teixeira Colombo

et al.

Global Ecology and Conservation, Journal Year: 2025, Volume and Issue: unknown, P. e03488 - e03488

Published: Feb. 1, 2025

Language: Английский

Citations

0
Environmental determinants of the taxonomic and functional alpha and beta diversity of small mammals in forest fragments in southwestern Amazonia, Brazil DOI Creative Commons
André Luís Botelho, Rosana Gentile, Cibele Rodrigues Bonvicino

et al.

Global Ecology and Conservation, Journal Year: 2025, Volume and Issue: unknown, P. e03445 - e03445

Published: Jan. 1, 2025

Language: Английский

Citations

0
Small forest patches and landscape-scale fragmentation exacerbate forest fire prevalence in Amazonia DOI Creative Commons
Ciar Noble, James J. Gilroy, Carlos A. Peres

et al.

Journal of Environmental Management, Journal Year: 2025, Volume and Issue: 375, P. 124312 - 124312

Published: Jan. 25, 2025

Over recent decades, forest fire prevalence has increased throughout the tropics, necessitating improved understanding of landscape-scale drivers occurrence. Here, we use MapBiomas land-cover and scar data to evaluate relationships between fragmentation, land-use, in a typically consolidated Amazonian agricultural frontier: Portal da Amazonia, Mato Grosso, Brazil. Using zero-/zero-one-inflated Beta regressions, investigate effects patch (area, shape, surrounding cover) variables (forest edge length, composition) on occurrence density 1985 2021. We show that was greatest small, complex patches. Small patches (≤100 ha) were also dominant contributors annual, regional cover. At (100 km2), length urban land cover positively associated with density. Furthermore, fires most likely occur landscapes consisting ∼45% pasture cover, while roughly linearly Cropland negatively Our findings indicate clear links fragmentation prevalence. This is cause for global concern, given rates Amazonia are increasing, eroding Amazon's capacity act as carbon sink. Efforts minimise further within would help reduce Within already fragmented regions, conversion into crops, alongside targeted efforts suppress small urbanized areas, may limit

Language: Английский

Citations

0
Multi-scale environmental drivers of lichen diversity: Insights for forest management DOI
Sonia Trobajo, Isabel Martínez, María Prieto

et al.

Forest Ecology and Management, Journal Year: 2025, Volume and Issue: 585, P. 122671 - 122671

Published: March 25, 2025

Language: Английский

Citations

0
Assessing of driving factors and change detection of mangrove forest in Kubu Raya District, Indonesia DOI Creative Commons
Rinto Wiarta,

Rato Firdaus Silamon,

Mohammed Ishag Arbab

et al.

Frontiers in Forests and Global Change, Journal Year: 2025, Volume and Issue: 8

Published: April 28, 2025

Land cover change information is needed to support decision-making in land-based natural resource management, especially coastal areas and mangrove ecosystems. This study aims assess the drivers detect forest over last 30 years Kubu Raya District, Indonesia, using satellite imagery data from United States Geological Survey (USGS) Earth Explorer. Maximum Likelihood Classification was used analyze images four different recording digitally: 1993 (Landsat 5), 2003 7), 2013 2023 8). Getis-Ord Gi* analysis also observe fragmentation distribution patterns determine with hot spots or cold Reticular Fragmentation Index (RFI) value as a consideration. Binary Logistic Regression (BLR) of social variables, including population density, education, accessibility, soil type, rainfall, temperature, slope, elevation. The results showed significant decrease cover, 1,011.37 km 2 1993–964.37 2023, an average loss 3.25 per year, mangroves, open areas, ponds, water bodies, agricultural settlements. pattern that occurs some northern part, there are insignificant points then turn into 2023. Meanwhile, were shifted spread central part area. In addition, variables provide values directly inversely proportional driving factors. Social factors, land access, have relationship change. Regulations made by government presence educated community main for ecosystem conservation; existing access not exploitation but only daily activities. Natural such alluvial types, high concentration nutrients, making them ideal sustainable agriculture ponds. Rainfall intensity contributes higher production stable pond water. Conservation efforts must consider these changes spatial dynamics effectively protect ecosystems future.

Language: Английский

Citations

0
Drivers of functional diversity in small-bodied mammals across a deforestation frontier in the Southern Brazilian Amazon DOI Creative Commons
Manoel dos Santos Filho, Thalita Ribeiro, Dionei José da Silva

et al.

Mammal Research, Journal Year: 2024, Volume and Issue: 69(2), P. 271 - 282

Published: Feb. 13, 2024

Abstract Deforestation remains the most pervasive driver of biodiversity erosion across tropical forests. Understanding how species can cope with such habitat changes is particularly important along rapidly expanding agricultural frontiers. To do so, we used a functional perspective examining small mammal responses to loss, fragmentation, and degradation ‘Arc Deforestation’ in Southern Brazilian Amazon. Small mammals were surveyed using combination conventional pitfall traps 20 forest fragments—ranging from 42 4743 ha—in addition two relatively continuous sites (> 7000 ha). These fragments lie isolated by cattle pasture matrix varying grazing intensity. We then analysed taxonomic diversity patterns—represented Simpson Diversity Rao Quadratic entropy indices—in Generalised Linear Models containing local- landscape-scale predictors variation. Further, trait composition approach based on community-weighted mean values depict predict variations this gradient. From total 847 individuals recorded belonging 24 taxa, tended follow diversity, both increasing fragment area. The dimension further was promoted low fire-related disturbance. Functional mainly driven quality, represented tree density, arthropod biomass, Our results reinforce that sustain depauperate assemblages taxonomically functionally. Accounting for quality allows boosting persistence groups. findings be improve efficiency management practices thereby maximising multiple dimensions their associated ecosystem services deforestation

Language: Английский

Citations

2
Biodiversity responses to insular fragmentation in Amazonia: two decades of research in the Balbina Hydroelectric Reservoir DOI
Ana Filipa Palmeirim, Maíra Benchimol, Danielle Storck‐Tonon

et al.

Zoological research: diversity and conservation., Journal Year: 2024, Volume and Issue: 1(2), P. 106 - 116

Published: Jan. 1, 2024

As hydropower development expands across lowland tropical forests, flooding and concomitant insular fragmentation have become important threats to biodiversity.Newly created landscapes serve as natural laboratories investigate biodiversity responses fragmentation.One of these most iconic is the Balbina Hydroelectric Reservoir in Brazilian Amazonia, occupying >400 000 ha comprising >3 500 forest islands.Here, we synthesise current knowledge on a wide range biological groups at Balbina.Sampling has largely concentrated set 22 islands three mainland sites.In total, 39 studies were conducted over nearly two decades, covering 17 vertebrate, invertebrate, plant taxa.Although species varied according taxonomic group, island area was consistently included played pivotal role 66.7% all examining patterns diversity.Species persistence further affected by traits, mostly related capacity use/traverse aquatic matrix or tolerate habitat degradation, noted for vertebrates orchid bees.Further research needed improve our understanding such effects wider ecosystem functioning.Environmental Impact Assessments must account changes both remaining amount configuration, subsequent long-term losses.

Language: Английский

Citations

2