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Termitofauna De Florestas Ombrófilas De Carajás - Resultados Preliminares

Authors: Magalhães, B.R; Sousa, M.S; Pereira, P.A.S; Oliveira, D.E;

Termitofauna De Florestas Ombrófilas De Carajás - Resultados Preliminares

Abstract

A região de Carajás, no sudeste do Pará, sofre intenso processo de remoção da vegetação, causando danos sérios à biodiversidade e afetando a riqueza e composição de espécies de cupins. O objetivo deste trabalho é avaliar os efeitos da fragmentação na riqueza, abundância e similaridade na composição da termitofauna entre fragmentos de floresta ombrófila. Coletamos em três fragmentos de diferentes tamanhos (Rebio Tapirapé, Fundação Zoobotânica e Cabo Rosa) no município de Marabá-PA. Em cada fragmento amostramos 20 parcelas de 2 x 5 m cada, equidistantes 20 m. Fizemos coletas complementares para melhorar o levantamento de espécies, mas esses dados foram excluídos da análise de similaridade. Fizemos uma análise de similaridade (ANOSIM) da composição de espécies entre as parcelas, utilizando o índice de Jaccard com 9999 permutações. Encontramos 61 espécies de cupins distribuídas nas três famílias: Kalotermitidae, Rhinotermitidae e Termitidae com 2, 3 e 56 espécies e 5, 43 e 417 colônias, respectivamente. Houve um predomínio de espécies e colônias da subfamília Nasutitermitinae, seguido por Termitinae, Syntermitinae e Apicotermitinae com 21, 15, 14 e 9 espécies e 80, 83, 78 e 176 colônias, respectivamente. Observamos uma correlação positiva entre o número de espécies e colônias com o tamanho do fragmento, tendo a Rebio Tapirapé 23 espécies; Cabo Rosa 21 espécies e Fundação Zoobotânica 17. Os resultados corroboram a hipótese de que fragmentos maiores possuem maior número de espécies porém sem alteração na composição de espécies (R = 0,0024; p = 0,4321).

Keywords

Carajás, Fragmentação, biodiversidade

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popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
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This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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