Estudo da Nematofauna no Bioma Mata Atlântica

Detalhes bibliográficos
Ano de defesa: 2017
Autor(a) principal: Müller, Carla Aristonara lattes
Orientador(a): Graeff-Teixeira, Carlos lattes
Banca de defesa: Não Informado pela instituição
Tipo de documento: Dissertação
Tipo de acesso: Acesso aberto
Idioma: por
Instituição de defesa: Pontifícia Universidade Católica do Rio Grande do Sul
Programa de Pós-Graduação: Programa de Pós-Graduação em Zoologia
Departamento: Faculdade de Biociências
País: Brasil
Palavras-chave em Português:
Área do conhecimento CNPq:
Link de acesso: http://tede2.pucrs.br/tede2/handle/tede/7686
Resumo: The Phylum Nematoda is extremely diverse and occurs in several ecosystems, thus occupying a key role in the soil trophic webs. The knowledge of nematode species and their patterns of distribution in soils habitats may contribute to our understanding of soil ecology and functioning. The aims of this work was to describe the nematofauna occurring in the Center of Research and Environmental Conservation - PRÓ-MATA-RS and classifies the nematodes according to their feeding habits thus provide additional information about the Pró Mata soil diversity. Identification was performed through light microscopy and following taxonomic keys evidencing the diagnostic characters of each group. In total, 1.500 nematodes were found into 200 cm³ of soil analyzed. The Chromadorea class was represented by 63% of the individuals, whereas the class Enoplea class by only 12%. Four orders, eight families and 13 genera were recovered. As for feeding trophic groups, were represented plant parasites by 35%, bacterial feeders by 30%, omnivores by 7% and predators by 5%. After extracting nematodes from soil, DNA extraction for amplification of the V4 and V9 regions of the 18S gene of ribosomal DNA was performed. The amplified product was sequenced, obtaining 281,400 sequences passed. Based on the DNA sequences, seven orders, 15 families, and 16 nematode genera were recovered.