Banca de DEFESA: EDER CORREA FERMIANO

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : EDER CORREA FERMIANO
DATA : 26/03/2021
HORA: 15:00
LOCAL: Remoto
TÍTULO:

COMMUNITY OF ANUROS IN AREAS OF ECÓTONO DE CERRADO, PANTANAL AND AMAZÔNIA IN THE SOUTHWEST OF MATO GROSSO

PALAVRAS-CHAVES:

Anurofauna, Chiquitano Dry Forest, Forest fragmentation, Edge effects, Pasture matrix.

PÁGINAS: 61
GRANDE ÁREA: Outra
ÁREA: Multidisciplinar
RESUMO:

Ecotones are important tools for conservation as they protect components from different ecosystems, contributing to regional diversification. In this study we analyzed:

1) the composition, richness and abundance of anurans in the ecoregion of Chiquitano Dry Forest, southwest of the state of Mato Grosso and, 2) the responses of anurans in face of the effects of edge and matrix in a fragmented landscape. Data collections occurred in 21 forest fragments in the years 2002 to 2004 in the rainy and dry season, with 10-day campaigns in each fragment. In each fragment, six sets of pitfall traps were installed, with the first being placed in the pasture matrix, the second on the edge and the subsequent four every 50 meters in the fragments. Each set was built with five buried 24-liter buckets, 10 meters apart, interconnected by 80cm-high fences. 839 individuals of 24 species of anurans and eight families were captured. Physalaemus albonotatus (n = 172) and Rhinella margaritifera (n = 114) represented the highest abundances and also the highest frequency indices, occurring in 76.19% (n = 16) of the areas. Leptodactylidae with 13 species was the most representative family, followed by Microhylidae (n = 3 spp.), Bufonidae and Hylidae (n = 2 spp.) and Craugastoridae, Dendrobatidae, Odontophrynidae and Phyllomedusidae with only one species. The wealth represents about 19% of the anurofaunistic diversity of the state of Mato Grosso. The species in this study are mostly common in open phytogeographic domains and with greater environmental plasticity, with the composition of species from the Cerrado, Pantanal and surroundings being more similar than in the Amazon. The intense forest fragmentation in this part of the state may have led to the replacement of species with greater requirements by others with greater plasticity in terms of habitat use. Despite this, species frequently associated with forest environments such as Leptodactylus petersii, Lithodytes lineatus, Osteocephalus taurinus and R. margaritifera have also been recorded. In addition, we recorded species endemic to the Cerrado (Pristimantis dundeei) and this region (Proceratophrys strussmannae), reinforcing the importance of ecotonal areas for species conservation. Also, among the records, we present an updated map and the southernmost record of the geographic distribution of L. lineatus, as well as the use of habitat. To understand the influence of landscape change in this region, we analyzed the composition, richness and abundance of anurans in pasture matrix, edge and forest habitats, considering the seasonal factor (drought and rain). The richness among the habitats did not present significant differences in any analyzed station. Despite this, the matrix held only 6.44% of the total abundance, with an increase in this pattern following the gradient matrix-edge-forest interior during the rainy (R² = 0.27; p = 0.014) and dry season (R² = 0.30; p = 0.005). The lower availability of micro-habitats for shelter and reproduction, as well as higher temperature and lower humidity in the pasture matrix, are possibly responsible for these responses. Therefore, the conversion of native vegetation to pastures can constitute an important threat to anurans, thus requiring a closer look at this region.

MEMBROS DA BANCA:
Presidente - 80970002 - DIONEI JOSE DA SILVA
Interno - 279342001 - DANIELLE STORCK TONON
Externo ao Programa - 118188001 - ERNANDES SOBREIRA OLIVEIRA JUNIOR
Externo à Instituição - PAULO SÉRGIO BERNARDE - UFAC