Jan KarlssonUmea University Swedenhttp://www.emg.umu.se/ |
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Effects of terrestrial organic matter on lake productivity |
| The common view of lake productivity, based on pelagic photosynthesis only, is strongly challenged today. The reason is that classical concepts generally do not account for benthic production (and resource use by fish) and for input of terrestrial organic matter which are now recognized as essential components of the carbon and energy flux in lake ecosystems. However, few attempts have been made to elucidate their combined effect on the productivity of whole lake ecosystems. In this talk I present recent research that challenges the idea of lake productivity as primarily controlled by nutrient supply to pelagic habitats. If this is verified, it will have far reaching consequences for our understanding of the function of lake ecosystems and their responses to e.g. climate change, emphasizing the need for a new conceptual model for the function of lake ecosystems. |
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Ort |
| 29.04.2010 14:00 Uhr Großer Hörsaal |
© IGB |