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- Publisher
- Wiley
- Copyright
- Copyright © 2006 Wiley Subscription Services, Inc., A Wiley Company
- ISSN
- 0323-4320
- eISSN
- 1521-401X
- DOI
- 10.1002/aheh.200500632
- Publisher site
- See Article on Publisher Site
Abstract
After installation of phosphorus elimination plants at the inflows of the eutrophic Lake Tegel and Schlachtensee, phosphorus (P) loading declined by a factor of 40 and 100, respectively. This resulted in a pronounced reduction of phosphorus concentrations in the lake water, followed by a decline of chlorophyll‐a concentrations. However, for many years P release from sediments due to mineralization and desorption of sedimentary P continued. In Schlachtensee, the presence of nitrate above the sediment suppresses P release, because the Fe/P ratio is sufficient to provide enough aerobic sorption capacity. In Lake Tegel, some P release occurs even under aerobic conditions because of the low aerobic P sorption capacity of the sediments. There, nitrate could moderate the P release peaks which occur when the Fe‐P cycle at the sediment water interface is disturbed by precipitation of iron sulfide after reduction of sulfate during times of high mineralization intensity. The potentially mobile P pool in the sediments of both lakes is rather small, indicating that the P release could subside after sufficient reduction of the external P load in Lake Tegel and the disruption of the internal P cycle in Schlachtensee.
Journal
Acta hydrochimica et hydrobiologica – Wiley
Published: Aug 1, 2006
Keywords: ; ; ; ;