| 1. |
- da Silva, F. R., et al.
(författare)
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Range maps and checklists provide similar estimates of taxonomic and phylogenetic alpha diversity, but less so for beta diversity, of Brazilian Atlantic Forest anurans
- 2016
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Ingår i: Natureza & Conservacao. - : Elsevier BV. - 1679-0073. ; 14:2, s. 99-105
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- Macroecological and biogeographical studies have assumed that range map data should be used only at coarser grains due to false presences (errors of commission) at small grains. This has been explored using mostly species richness, underrepresenting other potentially informative biodiversity metrics. Here, we evaluated these issues by quantifying the extent to which taxonomic and phylogenetic alpha and beta diversity patterns calculated using anuran range maps at three cell sizes (1 x 1km, 5 x 5 km, and 10 x 10 km) differ from the patterns calculated based on checklists in 14 protected areas along the southern range of the Brazilian Atlantic Forest. We found that range maps and checklists generated reasonably similar spatial richness patterns in all cell sizes (r >= 0.80 in all cases) and slightly weaker, but still correlated alpha phylogenetic diversity patterns (0.78 <= r <= 0.81). We also found that taxonomic (r <= 0.76) and phylogenetic (r <= 0.68) beta diversities had lower correlations than alpha spatial patterns. Therefore, range maps have value in documenting alpha biodiversity patterns, as well as beta diversity at more marginal levels, for tropical species at scales relevant to local conservation efforts. (C) 2016 Associaca Brasileira de Glenda Ecologica e Conservacao. Published by Elsevier Editora Ltda.
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| 2. |
- da Silva, Fernando Rodrigues, et al.
(författare)
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Zoogeographical regions in the Atlantic Forest: patterns and potential drivers
- 2024
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Ingår i: JOURNAL OF BIOGEOGRAPHY. - 0305-0270 .- 1365-2699.
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Tidskriftsartikel (refereegranskat)abstract
- AimTo delineate present-day zoogeographical regions of terrestrial vertebrates (frogs, lizards, snakes, birds and non-volant mammals) in the Atlantic Forest. Within each taxonomic group, we examine the relative importance of abrupt climatic transitions, orographic barriers, past climate change and rivers in shaping zoogeographical boundaries.LocationSouth America's Atlantic Forest.MethodsWe applied a network-based method to delineate zoogeographical regions, using distribution data (range maps) for 455 species of frogs, 103 lizards, 220 snakes, 917 birds and 202 non-volant mammals, in 50 x 50 km grid cells. We used hierarchical generalized linear mixed-effects models to test environmental predictors associated with zoogeographical boundaries. Finally, we intersected the bioregion maps delineated for each group to identify general patterns across all vertebrates.ResultsWe identified four zoogeographical regions for birds and snakes, and five for frogs, lizards and non-volant mammals. Depending on the group, contemporary and past climate conditions, elevation variation and/or rivers were associated with zoogeographical boundaries. The combined maps indicate that the Atlantic Forest retains four spatially cohesive zoogeographical regions based on present-day distribution of vertebrates.Main conclusionsCross-taxon congruence indicates that the geographical and environmental characteristics of the Atlantic Forest have a strong influence on the location of zoogeographical regions for vertebrates. In contrast, transition zones appear to be associated with the spatial distribution of life history traits of each group, potentially explaining the observed differences in the number of bioregions across groups and the position of zoogeographical boundaries. This work paves the way for further research into the evolutionary assembly of the Atlantic Forest's zoogeographical regions and may help inform conservation priorities for maintaining their distinctive faunas.
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| 3. |
- Garey, M. V., et al.
(författare)
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Species composition, conservation status, and sources of threat of anurans in mosaics of highland grasslands of southern and southeastern Brazil
- 2016
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Ingår i: Oecologia Australis. - : Oecologia Australis. - 2177-6199. ; 20:2, s. 94-108
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Tidskriftsartikel (refereegranskat)abstract
- Amphibians are the most threatened vertebrate group in the world, with about 32% of species under some category of threat. Conservation strategies depend on basic data, such as species distribution and natural history, which are largely lacking for endemic species inhabiting mosaics of highland grasslands and forest patches of Southern and Southeastern Brazil. Highland grassland fields occur in the Serra do Mar ecoregion and harbor an endemic anuran fauna associated to rocky outcrops and open fields interspersed among Araucaria, Rain and Cloud Forests. Here, we assembled occurrence records of anurans from mosaics of highland grasslands and forest patches in Brazil from the literature. We also compiled the conservation status of those species, including the spatial distribution of richness and endemism. We found that 75 species occur in this environment, of which about 46% are endemic. Highland grassland areas in and around Protected Areas in the Serra do Mar and Serra da Mantiqueira are under strong pressure, including criminal fire, forestry, and mining. Additionally, anurans from high altitude areas are apparently more prone to get infected by the chytrid fungus, whose growth is favored in cool and humid weather. Since anuran species inhabiting such seasonal environments have behavioral and life history adaptations, gathering data on how these disturbances affect anuran populations is urging in order to better inform conservation practices and landscape management plans. © 2016, Universidade Federal do Rio de Janeiro (UFRJ). All rights reserved.
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