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Filling of Petit-Saut hydroelectric reservoir (French Guiana): impact on aquatic invertebrates and fish nutriment
| Content Provider | Semantic Scholar |
|---|---|
| Author | Horeau, Véronique Champeau, Antoine |
| Copyright Year | 1997 |
| Abstract | Construction of Petit-Saut hydroelectric dam on the Sinnamary river gene¬ rated major modifications. The forest and fluvial ecosystem became a lacustrine eco¬ system. Following the filling of the reservoir (January 1994), a dense and diversified lacustrine fauna developed in the oxygenated epilimnion. In comparison with invertebrates in the river, species diversity dropped but nonetheless remained high. Colonization was first by smaller species and detritivores (cladocera Bosminidae and Cyclopidae), next by larger phytoplankton feeders, (cladocera Daphniidae and Calanidae), later carnivores (Chaoboridae) and finally by ostracoda, which dominated at the end of the filling stage (September 1995). Benthic macroinvertebrates (dragonflies, stoneflies, etc.) developed on the immersed trunks and boughs. Fish feed on this new lacustrian fauna and land invertebrates trapped by inflow. Downstream, the aquatic invertebrate fauna of the river has changed and is composed of plankton entrained from the reservoir. On the sandy bottom, benthic fauna benefit from the enrichment brought by lacustrine waters. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://www.hydroecologie.org/articles/hydro/pdf/1997/01/hydro97109.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
