| Autor: |
Souza ML; Departamento de Ecologia, IBRAG, Universidade do Estado do Rio de Janeiro, Rio de Janeiro, RJ, Brazil., Moulton TP, Silveira RM, Krsulović FA, Brito EF |
| Jazyk: |
angličtina |
| Zdroj: |
Brazilian journal of biology = Revista brasleira de biologia [Braz J Biol] 2007 Feb; Vol. 67 (1), pp. 47-51. |
| DOI: |
10.1590/s1519-69842007000100007 |
| Abstrakt: |
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. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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