A preliminary survey of biotic composition of the Olifantspruit catchment, South Africa
| Autor: | MJ Potgieter, Zcc Khoza, W Vlok |
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| Rok vydání: | 2012 |
| Předmět: | |
| Zdroj: | African Journal of Aquatic Science. 37:201-208 |
| ISSN: | 1727-9364 1608-5914 |
| Popis: | As a major tributary of the Nyl River, and ultimately for the Nylsvley wetland, the Olifantspruit, Limpopo province, South Africa, was investigated during the summer (high flow) and winter (low flow) of 2007 at three sites. This preliminary study used physical and biological indicators to determine the quality of the water that ultimately flows into Nylsvley. Significant seasonal differences were found. The observed differences relate to habitat structural differences and human activities in the catchment. Key findings included higher water temperatures during the high-flow period than during the low-flow period. The higher temperatures were accompanied by lower concentrations of dissolved oxygen at all sites. In total, 13 fish species were recorded, with most being found in the pool biotopes. The Nantes site, located nearest to the Nylsvley wetland, had the highest number of fish species, possibly indicating a linkage between these two systems. The most common macroinvertebrate families were the Baetidae... |
| Databáze: | OpenAIRE |
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