Use este identificador para citar ou linkar para este item: https://repositorio.inpa.gov.br/handle/1/16738
Título: From a bat's perspective, protected riparian areas should be wider than defined by Brazilian laws
Autor: Pereira, Lucas Gabriel do Amaral
Capavede, Ubirajara Dutra
Tavares, Valéria da C.
Magnusson, William Ernest
Bobrowiec, Paulo Estefano Dineli
Baccaro, Fabricio Beggiato
Palavras-chave: Water
Abundance
Bat
Community Structure
Conservation Planning
Environmental Legislation
Frugivory
Protected Area
Rainfall
Regulatory Framework
Riparian Forest
Riparian Zone
Stream
Threshold
Bat
Brazilian
Controlled Study
Law
Multidimensional Scaling
Nonhuman
Phyllostomidae
Prevalence
Rainforest
Riparian Ecosystem
Species Composition
Animals
Bat
Brasil
Ecosystem
Forest
River
Amazonas
Brasil
Ducke Reserve
Manaus
Animal
Brasil
Chiroptera
Ecosystem
Forests
Rivers
Data do documento: 2019
Revista: Journal of Environmental Management
Encontra-se em: Volume 232, Pags. 37-44
Abstract: Riparian areas around streams are those areas in which biological communites are directly influenced by the stream. The size of protected riparian areas and their conservation has become a controversial topic after changes implemented in the Brazilian Forest Code (BFC): a set of laws that regulates the size of Permanent Protection Areas (PPA). Here, we investigate the influence of distance from water bodies on bat-species and guild composition in a lowland Amazonian rainforest. Our hypotheses were that bat assemblages would change depending on the distance to the water body and that the abundance of herbivorous bats (frugivorous and nectarivorous) would be greater in areas close to water. Bats were captured with mist-nets in 24 riparian and 25 non-riparian plots within a trail grid in an old-growth terra-firme forest, northeast of Manaus, Amazonas, Brazil. Each plot was sampled three times in a total of 7056 net-hours. We captured 1191 bats, comprising 51 species. We used model selection based on AIC (Akaike Information Criterion) to compare linear and piecewise regressions to estimate the ecological thresholds for different bat assemblages. Piecewise models with one breakpoint were more parsimonious than linear models for abundance data, and the species and guild composition of animalivorous and frugivorous bats. Animalivorous-bat abundance increased from the stream to about 181 m, and frugivorous-bat abundance decreased within 50 m of the stream. The patterns of guild abundance suggest that frugivorous bats may need greater access to streams than animalivorous bats. The most conservative model suggests that most of the variation in bat composition occurs close to the stream and extends to up 114 m from the banks. Therefore, the 30 m wide strip of riparian forest protected by Brazilian law would maintain a relatively small fraction of bat-species assemblages in Ducke Reserve, and is insufficient to represent most of the assemblage-composition variation within the riparian zone. The suggestion to reduce the width of the protected riparian zone from 30 to 15 m for streams smaller than 10 m wide, as is under discussion, would likely be prejudicial for bat assemblages. © 2018 Elsevier Ltd
DOI: 10.1016/j.jenvman.2018.11.033
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