Measuring the trophic status of ponds: Relationships between summer rate of periphytic net primary productivity and water physico-chemistry
| Autor: | Lionel Sager |
|---|---|
| Rok vydání: | 2009 |
| Předmět: |
Fresh Water/analysis/chemistry
Geologic Sediments Environmental Engineering Nitrogen Fresh Water Nitrogen/analysis Aquatic plant parasitic diseases ddc:550 Geologic Sediments/analysis Animals Humans Water pollution Waste Management and Disposal Water Science and Technology Civil and Structural Engineering Trophic level Hydrology Water Pollutants Chemical/analysis Geography Ecology Ecological Modeling fungi Fishes Primary production Agriculture Pollution Macrophyte Solutions Productivity (ecology) Seasons Water quality Eutrophication Switzerland Water Pollutants Chemical Environmental Monitoring |
| Zdroj: | Water Research, Vol. 43, No 6 (2009) pp. 1667-1679 |
| ISSN: | 0043-1354 |
| DOI: | 10.1016/j.watres.2008.12.042 |
| Popis: | The monitoring of the water quality is a major environmental concern and specific method of assessment needs to be addressed for ponds. Among threats on freshwater, eutrophication remains an important and widespread problem. To assess if the trophic state of ponds can be significantly predicted by physico-chemical surrogates, parallel measurements of water physico-chemistry and of summer rates of periphytic net primary productivity (NPP) were performed on a set of nine lowland Swiss ponds representing the whole spectrum of trophic states. The developed methods to measure periphytic NPP on artificial substrates give similar values between the pseudo-replicates and are functional for ponds. The winter concentration of total nitrogen (TN) in the water is a significant predictor of the average summer rates of NPP while in submerged macrophyte beds total phosphorus (TP) is a better predictor. Rates of NPP measured in open water were most often higher and water transparency lower than in macrophyte beds, highlighting the positive influence of macrophytes on water quality and a possible co-occurrence in a pond of contrasting conditions when submerged species are present. This emphasizes the importance of maintaining or restoring submerged macrophyte stands in ponds to improve the water quality. |
| Databáze: | OpenAIRE |
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