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Assessing ecological quality of shallow lakes : Does knowledge of transparency suffice?

Assessing ecological quality of shallow lakes : Does knowledge of transparency suffice?

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PEETERS, Edwin T. H. M., Rob J. M. FRANKEN, Erik JEPPESEN, Brian MOSS, Eloy BÉCARES, Lars-Anders HANSSON, Susana ROMO, Timo KAIRESALO, Elisabeth GROSS, Ellen van DONK, Tiina NÕGES, Kenneth IRVINE, Ryszard KORNIJÓW, Marten SCHEFFER, 2009. Assessing ecological quality of shallow lakes : Does knowledge of transparency suffice?. In: Basic and Applied Ecology. 10(1), pp. 89-96. ISSN 1439-1791. Available under: doi: 10.1016/j.baae.2007.12.009

@article{Peeters2009Asses-7284, title={Assessing ecological quality of shallow lakes : Does knowledge of transparency suffice?}, year={2009}, doi={10.1016/j.baae.2007.12.009}, number={1}, volume={10}, issn={1439-1791}, journal={Basic and Applied Ecology}, pages={89--96}, author={Peeters, Edwin T. H. M. and Franken, Rob J. M. and Jeppesen, Erik and Moss, Brian and Bécares, Eloy and Hansson, Lars-Anders and Romo, Susana and Kairesalo, Timo and Gross, Elisabeth and Donk, Ellen van and Nõges, Tiina and Irvine, Kenneth and Kornijów, Ryszard and Scheffer, Marten} }

eng Scheffer, Marten Assessing ecological quality of shallow lakes : Does knowledge of transparency suffice? Irvine, Kenneth Scheffer, Marten Peeters, Edwin T. H. M. Romo, Susana Kairesalo, Timo Kairesalo, Timo First publ. in: Basic and Applied Ecology 10 (2009), 1, pp. 89-96 Hansson, Lars-Anders Attribution-NonCommercial-NoDerivs 2.0 Generic Peeters, Edwin T. H. M. Moss, Brian Franken, Rob J. M. Nõges, Tiina Bécares, Eloy Gross, Elisabeth Gross, Elisabeth Jeppesen, Erik 2011-03-24T17:33:14Z 2009 Kornijów, Ryszard Donk, Ellen van Bécares, Eloy Donk, Ellen van application/pdf Moss, Brian Jeppesen, Erik Irvine, Kenneth Nõges, Tiina Franken, Rob J. M. Hansson, Lars-Anders 2011-03-24T17:33:14Z Kornijów, Ryszard Romo, Susana The European Water Framework Directive (WFD) requires that all aquatic ecosystems in their member states should reach "good" ecological quality by 2015. To assess ecological quality, the WFD requires the definition of reference conditions using biological, physical and chemical indicators and the assignment of each water body to one of five quality classes using these indicators. Elaborate assessment schemes using large sets of variables are now being developed. Here we address the question whether all this is really needed and what the simplest assessment approach would be for the case of shallow lakes. We explore the relationships between the quality class assigned to a lake by experts in shallow lake ecology and a rich set of biological, physical, and chemical data. Multinomial logistic regression analyses were carried out based on data from 86 shallow lakes throughout Europe that were sampled in 2000 and/or 2001. Ecological quality of shallow lakes judged by experts was strongly correlated to physical and chemical variables associated with light regime and nutirients and much less to biological variables.<br />Our regression model showed that ecological quality of this set of shallow lakes judged by experts could be predicted quite well from water transparency expressed as Secchi depth and that other variables did not contribute to it significantly. According to the WFD, lakes should at least have a "good" ecological quality. Quality judged by experts and predicted quality were similar for 78 % of the lakes with respect to meeting this standard. As a cautionary note we stress that Secchi depth alone will be a less useful indicator if effects of stressors other than eutrophication (e.g. lake acidification and toxic pollution) are to be considered.

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