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Phosphorus decrease and climate variability : mediators of synchrony in phytoplankton changes among European peri-alpine lakes

Phosphorus decrease and climate variability : mediators of synchrony in phytoplankton changes among European peri-alpine lakes

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ANNEVILLE, Orlane, Sonja GAMMETER, Dietmar STRAILE, 2005. Phosphorus decrease and climate variability : mediators of synchrony in phytoplankton changes among European peri-alpine lakes. In: Freshwater Biology. 50(10), pp. 1731-1746. ISSN 0046-5070. eISSN 1365-2427. Available under: doi: 10.1111/j.1365-2427.2005.01429.x

@article{Anneville2005Phosp-6529, title={Phosphorus decrease and climate variability : mediators of synchrony in phytoplankton changes among European peri-alpine lakes}, year={2005}, doi={10.1111/j.1365-2427.2005.01429.x}, number={10}, volume={50}, issn={0046-5070}, journal={Freshwater Biology}, pages={1731--1746}, author={Anneville, Orlane and Gammeter, Sonja and Straile, Dietmar} }

Anneville, Orlane 2011-03-24T17:27:11Z Gammeter, Sonja Gammeter, Sonja Phosphorus decrease and climate variability : mediators of synchrony in phytoplankton changes among European peri-alpine lakes Straile, Dietmar First publ. in: Freshwater Biology 50 (2005), 10, pp. 1731 1746 Anneville, Orlane application/pdf deposit-license eng 1. In an attempt to discern long-term regional patterns in phytoplankton community composition we analysed data from five deep peri-alpine lake basins that have been included in long-term monitoring programmes since the beginning of the 1970s. Local management measures have led to synchronous declines in phosphorus concentrations by more than 50% in all four lakes. Their trophic state now ranges from mesotrophic to oligotrophic.<br />2. No coherence in phytoplankton biomass was observed among lakes, or any significant decrease in response to phosphorus (P)-reduction (oligotro- phication), except in Lakes Constance and Walen.<br />3. Multivariate analyses identified long-term changes in phytoplankton composition, which occurred coherently in all lakes despite the differing absolute phosphorus concentrations.<br />4. In all lakes, the phytoplankton species benefiting from oligotrophication included mixotrophic species and/or species indicative of oligo-mesotrophic conditions.<br />5. A major change in community composition occurred in all lakes at the end of the 1980s. During this period there was also a major shift in climatic conditions during winter and early spring, suggesting an impact of climatic factors.<br />6. Our results provide evidence that synchronous long-term changes in geographically separated phytoplankton communities may occur even when overall biomass changes are not synchronous. 2011-03-24T17:27:11Z Straile, Dietmar 2005

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