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Title: Efeito da monocultura de dendezeiro (Elaeis guineensis JACQ.) na integridade física e nas assembleias de peixes de igarapés da Amazônia Oriental
metadata.dc.creator: FERREIRA, Márcio Cunha
metadata.dc.contributor.advisor1: MONTAG, Luciano Fogaça de Assis
Keywords: Ictiofauna
Elaeis guineensis
Habitat (Ecologia)
Rio Acará - PA
Rio Acará-Mirim - PA
Tomé-Açu - PA
Pará - Estado
Amazônia brasileira
Issue Date: 25-Feb-2014
Publisher: Universidade Federal do Pará
Citation: FERREIRA, Márcio Cunha. Efeito da monocultura de dendezeiro (Elaeis guineensis JACQ.) na integridade física e nas assembleias de peixes de igarapés da Amazônia Oriental. 2014. 51 f. Dissertação (Mestrado) - Universidade Federal do Pará, Instituto de Ciências Biológicas, Belém, 2014. Programa de Pós-Graduação em Ecologia Aquática e Pesca.
Abstract: The aim of the present study is to evaluate the effect of palm oil farming Elaeis guineenses JACQ. in the integrity of physical habitat and in the assemblages of fishes in upland streams of Eastern Amazonia. The sampling sites were established in sections (150 m) of 23 streams in the Acará-Mirim basin, northeastern of Pará state. According to the results of the index of physical integrity, all streams (n = 8) that drain forest areas were classified as preserved (IPI = 5.00 to 4.00), whereas the 15 streams that drain oil palm plantations have been classified as changed (IIF = 3.67 to 2.67). 9,734 specimens of fish belonging to six orders, 24 families, over 64 species were collected. The most abundant species during the study were Microcharacidium weitzmani, Apistogramma gr. regain, Trichomycterus hasemani, Hyphessobrycon heterorhabdus and Copella arnoldi. The richness observed in streams that drain plantations was higher (S = 61) than found in the streams in forest fragments (S = 42). The results of PERMANOVA show that exist differences between sites (GL = 22; pseud – F = 2.44; P = 0.01), however the ordering produced by NMDS shows that this difference is subtle (stress = 0.19). a similar result was obtained using functional trophic groups abundance (stress = 0.18). the results of TITAN indicates that some species are adapted to persist in certain environmental conditions, such as Aequidens tetramerus, Apistogramma agassizii and Microcharacidium weitzmani are associated with lower physical habitat integrity (P < 0.05; purity > 0.95; reliability > 0.95), while the species Hyphessobrycon heterorhabdus and Helogenes marmoratus shown to be indicative of more intact habitats (P < 0.05; purity > 0.95; reliability > 0.95). There was no correlation between the species richness and the index of physical integrity, while the only functional trophic groups that correlated with the index were the diggers and collectors browsers. These groups are composed by Cichlid fishes that have tolerant and generalist behaviors that may have explained his great contribution in the fish assemblage even in places where sedimentation was high compared to places with the nearest natural setting. This shows that even species richness was higher in altered streams there are strong evidences of loss of environmental quality in streams draining plantations generated by the cultivation of oil palm.
Appears in Collections:Dissertações em Ecologia Aquática e Pesca (Mestrado) - PPGEAP/NEAP

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