Landscape connectivity may explain anuran species distribution in an Atlantic forest fragmented area

Almeida‐Gomes, Mauricio; Rocha, Carlos Frederico Duarte

doi:10.1007/s10980-013-9898-5

Cited by 37 publications

(37 citation statements)

References 43 publications

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“…). In fact, in the Brazilian Atlantic Forest, matrix habitats are often characterized by a predominance of species adapted to open environments, such as hylids, which reproduce in permanent or temporary ponds (Almeida‐Gomes & Rocha ). In addition, forest species may be able to use the surrounding matrix for reproduction.…”

Section: Discussionmentioning

confidence: 99%

Amphibians on Amazonian Land‐Bridge Islands are Affected More by Area Than Isolation

et al. 2015

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River damming has created fragmented landscapes in parts of the Amazon basin. The resulting decrease in forest area could directly affect amphibian species if large areas of habitat are required to guarantee the presence of specific types of breeding sites. Here, we describe the anuran assemblages on islands created by damming of the Tocantins River twenty years ago in the eastern Amazon basin. We surveyed 10 undisturbed islands varying in size from 3 to 2140 ha and located at distances of up to 6.7 km from the margin of the reservoir. We identified 32 frog species, of which 15, 14, and 3 have aquatic, semiaquatic, and terrestrial development, respectively. The number of frog species increased significantly with island area but was not affected by island distance from the margin. Species with aquatic or semiaquatic development tended to be absent from the smaller islands, regardless of the degree of isolation from the mainland. These findings emphasize the need to preserve specific microhabitats on smaller land‐bridge islands to maintain amphibian diversity in reservoir environments.

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Section: Discussionmentioning

confidence: 99%

Amphibians on Amazonian Land‐Bridge Islands are Affected More by Area Than Isolation

et al. 2015

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“…Frog species were classified as forest‐dependent and generalists according to their habitat use, as habitat loss and fragmentation can affect differently habitat specialist and generalist species (Almeida‐Gomes, Prevedello & Crouzeilles, ). We considered forest‐dependent species as those that are mainly found in forest areas even if some of them are occasionally found in matrix areas (Almeida‐Gomes & Rocha, ; Almeida‐Gomes, Vieira et al., ; Haddad et al., ). Generalist species were those found in both forest and matrix areas, most of them being common in disturbed habitats (Almeida‐Gomes, Rocha & Vieira, ).…”

Section: Methodsmentioning

confidence: 99%

“…Generalist species were those found in both forest and matrix areas, most of them being common in disturbed habitats (Almeida‐Gomes, Rocha & Vieira, ). This classification relies on previous samplings in pasture matrix in the same study area (Almeida‐Gomes & Rocha, ; Almeida‐Gomes, Rocha et al., ) and available information for Atlantic Forest frogs (Haddad et al., ). Analyses were performed for forest and generalist species separately as we expect they respond differently to forested habitat amount.…”

Section: Methodsmentioning

confidence: 99%

Habitat amount drives the functional diversity and nestedness of anuran communities in an Atlantic Forest fragmented landscape

et al. 2019

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Natural environments disturbed by human activities can suffer from species extinctions, but some can still harbor high taxonomic diversity. However, disturbances may have impacts beyond the species level, if the species lost represent unique functions in the ecosystem. In this study, we evaluated to what extent the amount of habitat can determine the functional diversity and nestedness of amphibian communities in an Atlantic Forest fragmented landscape in Brazil, and if there is a threshold of habitat amount beyond which there is severe loss of functional diversity. As species responses may depend on their habitat type, we performed the analyses for three different sets of species: all species, forest‐dependent species, and generalist species. We also evaluated the relative importance of turnover and nestedness components to total functional dissimilarity among sites. Habitat amount affected functional diversity of frogs, especially for forest‐dependent species where a linear reduction was detected. The functional dissimilarity among sites was mostly explained by the nestedness component. The reduction of functional diversity was mediated by an ordered loss of traits, leading to a functionally nested metacommunity. These sensitive traits were closely related to habits and reproductive modes that depend on rivers and streams. The maintenance of functional diversity of frogs in fragmented landscapes must rely on the conservation of both terrestrial and aquatic environments, as some species and their traits can disappear from remnants of native vegetation lacking some specific habitats (e.g. streams). Abstract in Portuguese is available with online material.

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“…In our study, 2 specimens were found on the ground, but the third specimen was on a large leaf approximately 30 cm above the ground. The species has never been recorded outside of the forest and probably cannot reproduce outside of the forest (Almeida-Gomes 2014b). All reported specimens were found at or below 800 m a.s.l., with 1 exception (over 1060 m a.s.l.)…”

Section: Notes On Geographic Distributionmentioning

confidence: 96%

First record of Ischnocnema octavioi (Bokermann, 1965) from São Paulo state, Brazil

Holer¹,

Sýkorovský²,

Hejcmanová³

2017

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Landscape connectivity may explain anuran species distribution in an Atlantic forest fragmented area

Cited by 37 publications

References 43 publications

Amphibians on Amazonian Land‐Bridge Islands are Affected More by Area Than Isolation

Amphibians on Amazonian Land‐Bridge Islands are Affected More by Area Than Isolation

Habitat amount drives the functional diversity and nestedness of anuran communities in an Atlantic Forest fragmented landscape

First record of Ischnocnema octavioi (Bokermann, 1965) from São Paulo state, Brazil

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