Photos from the Field: Habitat Loss & Frog Reproductive Modes in the Atlantic Forest

Almeida-Gomes, M. and Rocha, C. F. D. (2015), Habitat Loss Reduces the Diversity of Frog Reproductive Modes in an Atlantic Forest Fragmented Landscape. Biotropica, 47: 113–118. doi: 10.1111/btp.12168

 

Several amphibian species have ecological traits that can make them vulnerable to landscape changes, such as habitat preference and reproductive strategies. We evaluated how anuran species and their respective reproductive modes were distributed in an Atlantic Forest fragmented landscape, Southeastern Brazil. We sampled through visual encounter surveys three continuous forest sites, 12 forest fragments and five pasture areas (matrix) between July 2007 and March 2010. We recorded 50 anuran species with 15 reproductive modes, a third of them (33.3%) recorded only in continuous forest sites (modes 3, 8, 19, 25 and 36). These reproductive modes found only in continuous forest sites are typically forest-associated, and seem to be more vulnerable to habitat loss. Additionally, we found a trend for larger fragments to harbor both higher number of types of reproductive sites and diversity of frog reproductive modes. Our findings suggests that fragment sizes can better predict the number of frog reproductive modes than the species richness in Atlantic Forest fragmented landscapes, and highlights the need to consider frog reproductive traits in future studies.

Atlantic Forest fragment (Photo by M. Almeida-Gomes)

Atlantic Forest fragment (Photo by M. Almeida-Gomes)

Stereocyclops parkeri (Photo by M. Almeida-Gomes)

Stereocyclops parkeri (Photo by M. Almeida-Gomes)

Stereocyclops parkeri (Photo by M. Almeida-Gomes)

Proceratophrys boiei (Photo by M. Almeida-Gomes)

Proceratophrys boiei

Ischnocnema guentheri (Photo by M. Almeida-Gomes)

Ischnocnema guentheri (Photo by M. Almeida-Gomes)

Hypsiboas albomarginatus (Photo by M. Almeida-Gomes)

Hypsiboas albomarginatus (Photo by M. Almeida-Gomes)

Scinax albicans (Photo by M. Almeida-Gomes)

Scinax albicans (Photo by M. Almeida-Gomes)

Large River inside of REGUA 2 (Photo by M. Almeida-Gomes)

Large River inside of REGUA  (Photo by M. Almeida-Gomes)

View of continuous forest (Photo by M. Almeida-Gomes)

View of continuous forest (Photo by M. Almeida-Gomes)