Spatio-Temporal Distribution and Ecological Preferences of Coexisting Hydropsychid Species (Trichoptera) in Two Mediterranean River Basins (S Spain)
✍ Scribed by Alfonso Gallardo-Mayenco; José Prenda; Julia Toja
- Publisher
- John Wiley and Sons
- Year
- 1998
- Tongue
- English
- Weight
- 655 KB
- Volume
- 83
- Category
- Article
- ISSN
- 1434-2944
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✦ Synopsis
The hydropsychids of two Mediterranean river basins in southern Spain (Guadaira and Guadalete) were investigated from January 1988 to January 1989. The distribution of hydropsychids along an environmental gradient related to altitude varied depending on species. Two distinct species assemblages were observed, one located in the lower altitude sites (the "downstream assemblage" comprising Hydropsyche picreforurn, Hydropsyche exocellatn and Cheurnatopsyche fepida) and the other in the upper-most areas (the "upstream assemblage" comprising Hydropsyche prtnica, Hydropsyche infernalis, Hydropsyche insrahilis), which displayed a statistically significant preference for this type of habitat. Finally, H. picretorurn, selected the lowest sites. From a temporal point of view most spec-ies displayed a high variability in density dynamics between sites, suggesting a strong plasticity in life-cycle phenology.