Uso de um corredor de vegetação por pequenos mamíferos em uma paisagem fragmentada de Mata Atlântica, MG

• Ano de defesa: 2010
• Autor(a) principal: Rocha, Mariana Ferreira
• Orientador(a): Passamani, Marcelo
• Banca de defesa: Pardini, Renata
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: UNIVERSIDADE FEDERAL DE LAVRAS
• Programa de Pós-Graduação: DBI - Departamento de Biologia
• País: BRASIL
• Palavras-chave em Português: Fragmento florestal; Matriz de café; Pequenos mamíferos; Conedor; Forest fragment; Coffee matrix; Small mammals; Conidor
• Área do conhecimento CNPq: CNPQ_NÃO_INFORMADO
• Link de acesso: https://repositorio.ufla.br/handle/1/3202

Changes in the landscape as a result of the process of forest fragmentation is currently one of the greatest threats to biodiversity and vegetation corridors are one of the alternatives for minimizing the effects of the structural isolation of forest fragments, increasing the functional connectivity, especially in landscapes dominated by low permeability matrix. Whereas vegetation corridors are elements commonly observed in southern and southwest region and have been poorly studied, this study aimed to evaluate the composition and community structure of small mammals in forest fragments, vegetation corridor and coffee matrix, determining how and which species use the corridor and verifying the functionality of this structure as habitat for the marsupial Marmosops incanus in municipality of Santo Antonio do Amparo, Brazil. For this, we sampled between December 2008 to May 2009, two fragments, a corridor that connects these fragments and a coffee matrix, and marked a total of 14 transects sampled by live-traps, and the method used was the capture-mark-recapture. We recorded a total of 17 species, and the corridor was the site that showed the highest richness (14 species), followed by the fragments (10) and matrix (6). The total abundance was similar between the fragment and corridor (F = 22,935; P = 0,064), being significantly lower in the coffee matrix compared to those sites (matrix x corridor: P < 0,001; matrix x fragment: P = 0,007). However, the abundance of five species more commonly captured was significantly different between sites, and M. incanus were most abundant in the fragments, Cerradomys subflavus, Gracilinanus microtarsus and Rhipidomys sp in corridor and Calomys sp. in matrix, which was corroborated by indicator species analysis. Most species of small mammals remained, on average, more time in the corridor than in the fragments and matrix. Different results demonstrated that the corridor provide suitable habitat for the marsupial M. incanus, since (I) holds a resident population, (ii) the average weight did not differ between this site and the fragments and (III ) individuals of different age classes were also present in the corridor, as well males and females in the same proportion. The mean residence time of females and males was similar between sites (residence time in male and female in corridor: U = 17,00, P = 0,308; and in fragments: U = 139,5, P = 0,476). Given the results, it appears that the corridor is used by species characteristic of forest interior as those associated with the edge, and they perform as habitat for most species of small mammals. In this way, data for small mammals in this study reinforce the importance of the corridor in this fragmented landscape and corroborate the results reported in other areas closer using other organisms, showing that the conservation of these structures should be encouraged.