Relationship between banana plant cultivation and stream macroinvertebrate communities

Abstract

Aims:The present study describes the influence of banana plant cultivation on macroinvertebrate communities of streams located in the southeastern region of São Paulo state in the Atlantic Forest (four located in areas of banana cultivation and four in preserved areas); Methods: Sampling was performed during October and November of 2005. The fauna was collected with Surber sampler and a D-aquatic net (both with mesh of 0.25 mm) in rapids and backwaters. Simultaneously, an environmental characterization of each stream was made; Results: In total, 3,609 individuals were collected, distributed in 57 families, in which 45 were in forested streams and 46 in the banana plantation sites. Gripopterygidae, Perlidae, Leptophlebiidae, Leptoceridae, Helicopsychidae and Palaemonidae were abundant in forested streams, while Hydropsychidae, Chironomidae and Baetidae were abundant in the streams located in banana cultivation areas. Cluster analysis (UPGMA) with Simpson similarity measurement applied to the fauna of all streams evidenced the differences between forested and banana plantation streams. An analysis of similarity applied to both situations also pointed to significant differences (p < 0.05) between the two areas; Conclusions: This agricultural activity, although did not influence species richness patterns, seems to influence the structure of macroinvertebrate communities in low order streams in the Atlantic Forest region.Keywords: stream macroinvertebrates, lotic systems, banana cultivation, neotropical region, southeastern Brazil.Resumo: Objetivos: O presente estudo analisou a influência do cultivo de banana sobre a comunidade de macroinvertebrados aquáticos de córregos localizados na região sul do Estado de São Paulo em áreas de Mata Atlântica (quatro em áreas com cultivo de banana e quatro localizados em áreas preservadas); Métodos: As coletas da fauna foram realizadas no período de outubro a novembro de 2005. Os macroinvertebrados foram coletados com amostrador tipo Surber e rede D, ambos com malha de 0,25 mm em áreas de corredeira e remanso; Resultados: No total, foram coletados 3609 macroinvertebrados pertencentes a 57 famílias, sendo 45 nos córregos florestados e 46 nos locais de cultivo da banana. Gripopterygidae, Perlidae, Leptophlebiidae, Leptoceridae, Helicopsychidae, e Palaemonidae foram mais abundantes nos córregos preservados, enquanto Hydropsychidae, Chironomidae e Baetidae foram mais abundantes nos córregos localizados em áreas de plantações de banana. A diversidade, a riqueza e os índices comunitários responderam às características do uso de terra analisados. A análise de Cluster, utilizando-se UPGMA e Simpson como medida de similaridade, aplicada sobre a fauna de macroinvertebrados aquáticos, apontou para dois agrupamentos, sendo um localizado em áreas com cultivo de banana e outro localizado na área preservada. O teste de similaridade (ANOSIM) aplicado aos dois agrupamentos também apontou para diferenças significativas (p < 0,05) entre as duas áreas; Conclusões: Esta atividade agrícola, a...

Landscape composition as a determinant of diversity and functional feeding groups of aquatic macroinvertebrates in southern rivers of the Araucania, Chile

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How oil palm cultivation is affecting mayfly assemblages in Amazon streams

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Effects of pyrimethanil fungicide on Chironomidae community structure

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