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Resource competition between macrobenthic epifauna in a Kenyan Avicennia marina mangrove forest
Schrijvers, J.; Fermon, H.; Vincx, M. (1996). Resource competition between macrobenthic epifauna in a Kenyan Avicennia marina mangrove forest. Mar. Ecol. Prog. Ser. 136: 123-135
In: Marine Ecology Progress Series. Inter-Research: Oldendorf/Luhe. ISSN 0171-8630; e-ISSN 1616-1599, meer
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| Trefwoorden |
Avicennia marina (Forssk.) Vierh. [WoRMS]
Marien/Kust |
| Auteurs | | Top |
- Schrijvers, J., meer
- Fermon, H.
- Vincx, M., meer
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| Abstract |
A cage exclusion experiment was used to examine the interaction between the epibenthos (permanent and visiting) and the macroinfauna of a high intertidal Kenyan Avicennia marina mangrove sediment. Densities of Oligochaeta (families Tubificidae and Enchytraeidae), Amphipoda, Insecta larvae, Polychaeta and macro-Nematoda, and a broad range of environmental factors were followed over 5 mo of caging. A significant increase of amphipod and insect larvae densities in the cages indicated a positive exclusion effect, while no such effect was observed for oligochaetes (Tubificidae in particular), polychaetes or macronematodes. Resource competitive interactions were a plausible explanation for the status of the amphipod community. This was supported by the parallel positive exclusion effect detected of microalgal densities. It is therefore hypothesized that competition for microalgae and deposited food sources is the determining structuring force exerted by the epibenthos on the macrobenthic infauna. However, the presence of epibenthic predation can not be excluded. |
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