Responses of Chironomidae (Diptera; Insecta) to the exclusion of shrimps and Ephemeroptera in a coastal forest stream, Rio de Janeiro, Brazil

Brazilian Journal of Biology

Ml. Souza¹  Tp. Moulton¹  Rml. Silveira¹  Fam. Krsulovic¹  Ef. Brito¹ 

[1] ,Universidade do Estado do Rio de Janeiro IBRAG Departamento de EcologiaRio de Janeiro RJ ,Brazil

关键词: Cricotopus;    electric exclusion;    Macrobrachium;    Baetidae;    periphyton;    Cricotopus;    exclusão por eletricidade;    Macrobrachium;    Baetidae;    perifíton;   

DOI  :  10.1590/S1519-69842007000100007

来源: SciELO

【 摘 要 】

In a benthic community on a continuous flat granite substrate in a third-order coastal forest stream, the dominant chironomid (Cricotopus) increased in number when shrimps (Macrobrachium olfersi and Potimirim glabra) and baetid ephemeropterans were excluded by electricity. The response appeared to be mediated by an increase in periphyton and sediments, rather than a reduction of direct predation or interference. Chironomids, periphyton and sediments decreased significantly compared to the control when shrimps only were excluded. Baetid ephemeropteran appeared to be the most important determinants of periphyton and sediment mass; the density of chironomids appeared to follow the quantity of periphyton and sediments.

【 授权许可】

CC BY   
 All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License