Banca de QUALIFICAÇÃO: EDER CORREA FERMIANO

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
DISCENTE : EDER CORREA FERMIANO
DATA : 24/09/2020
HORA: 14:00
LOCAL: Web conferência
TÍTULO:

COMPOSITION AND STRUCTURE OF THE ANURUS COMMUNITY IN AREAS OF ECÓTONO DE CERRADO, PANTANAL AND AMAZÔNIA IN THE SOUTHWEST OF MATO GROSSO

PALAVRAS-CHAVES:

Amphibians, Anurofauna, Composition, Semideciduous Forests, Fragmentation, Ecotone.

PÁGINAS: 41
GRANDE ÁREA: Outra
ÁREA: Multidisciplinar
RESUMO:

The several activities inherent to the human species have culminated in extensive changes in natural environments, especially in tropical and subtropical regions of the world. Deforestation has the direct consequence of reducing and isolating habitats, increasing the harmful effects of this process. With this, several groups of organisms can be affected, influencing aspects of composition, wealth and abundance and even distribution. The southwest region of the state of Mato Grosso was heavily deforested mainly for the use of livestock since the 1970, and despite this, few studies have proposed to analyze the responses of different groups to these changes. In the state, information for amphibians was mainly concentrated in portions of the Cerrado, areas of the Pantanal and in the north of Mato Grosso where it is occupied by the Amazon biome, resulting in gaps in basic aspects of the ecotone species. In this sense, considering the lack of information about the group and due to the pressure exerted by livestock activities in this region, this study proposed the following objectives: to analyze the composition, wealth and abundance of anurans in the ecotonal zone and also as the physical and environmental factors influence these patterns in forest fragments. Anuran samplings were carried out in 21 fragments of Submontana Semideciduous Seasonal Forest, present in the ecoregion of Chiquitano dry forests in the southwestern portion of Mato Grosso. Data collections took place from 2002 to 2004 in the months of December to February (rainy season) and June to August (dry season), with 10-day campaigns in each fragment. Fragments 1 to 9 were sampled in both seasons and the others, only on one occasion, 10 to 14 during the rainy season and 16 to 23 during the dry season. In each fragment, six sets of pitfall traps were installed, with the first being placed in the pasture matrix, 50 meters from the edge, the second on the edge and the subsequent four every 50 meters towards the core of the fragments. Each set was built with five 24-liter buckets buried every 10 meters and interconnected by 80cm-high fences. The sampling effort resulted in 839 individuals of 24 anuran species and eight families. 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. There was a strong correlation between species richness and abundance with the rainy season. 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, being more similar to the composition of species from the Cerrado, Pantanal, and surroundings than to the compositions of humid forests in the Amazon. The intense forest fragmentation in this part of the state may have led to the replacement of species with greater physiological requirements by others with greater plasticity and considered generalists regarding the use of the habitat. Despite this, in our study, we registered species commonly associated with forest environments such as Leptodactylus petersii, Lithodytes lineatus, Osteocephalus aff. taurinus and Rhinella margaritifera. Other species, although occurring in open areas, do not show adaptations to anthropogenic disorders. In addition, we recorded species endemic to the Cerrado (Pristimantis dundeei) and this region (Proceratophrys strusmannae), reinforcing the importance of these areas for species conservation. In addition, among our records, we expanded the known geographical distribution for the species Lithodytes lineatus in the southwest of the state of Mato Grosso. From six new individuals, we expanded its distribution 320 km south of its nearest occurrence, in Bolivia.

MEMBROS DA BANCA:
Presidente - 80970002 - DIONEI JOSE DA SILVA
Interno - 279342001 - DANIELLE STORCK TONON
Externo ao Programa - 71440008 - MANOEL DOS SANTOS FILHO
Externo ao Programa - 118188001 - ERNANDES SOBREIRA OLIVEIRA JUNIOR