Submerged macrophytes are important elements for the structure and functioning of lake ecosystems. In this study, we used chemical and maximum colonisation depth (C_max) data from 12 European countries in order to investigate how suitable C_max may describe the impact by eutrophication. The analyses include data from 757 lakes and 919 lake years covering oligotrophic to eutrophic lakes. Overall, C_max was closely related to Secchi depth (R2 = 0. 58) and less closely to chlorophyll a (R2 = 0. 31), TP (R2 = 0. 31) and total nitrogen, TN (R2 = 0. 24). The low coefficients of determination between C_max and nutrient concentrations suggest that other response factors than nutrient-phytoplankton-light conditions are important for C_max and that it will be difficult to establish strong relationships between external nutrient loading and C_max. Yearly monitoring for 13-16 years in eight Danish lakes showed considerable year-to-year variability in C_max, which for the individual lakes only related weakly to changes in Secchi depth. The use of C_max as an eutrophication indicator is especially relevant in not very shallow lakes (maximum depth >4-5 m), not too turbid lakes (C_max >1 m) and not very humic lakes (colour <60 mg Pt/l). © 2012 Springer Science+Business Media Dordrecht.

Maximum growing depth of submerged macrophytes in European lakes / Sondergaard, M.; Phillips, G.; Hellsten, S.; Kolada, A.; Ecke, F.; Maemets, H.; Mjelde, M.; Azzella, M. M.; Oggioni, A.. - In: HYDROBIOLOGIA. - ISSN 0018-8158. - 704:1(2013), pp. 165-177. [10.1007/s10750-012-1389-1]

Maximum growing depth of submerged macrophytes in European lakes

Azzella M. M.;
2013

Abstract

Submerged macrophytes are important elements for the structure and functioning of lake ecosystems. In this study, we used chemical and maximum colonisation depth (C_max) data from 12 European countries in order to investigate how suitable C_max may describe the impact by eutrophication. The analyses include data from 757 lakes and 919 lake years covering oligotrophic to eutrophic lakes. Overall, C_max was closely related to Secchi depth (R2 = 0. 58) and less closely to chlorophyll a (R2 = 0. 31), TP (R2 = 0. 31) and total nitrogen, TN (R2 = 0. 24). The low coefficients of determination between C_max and nutrient concentrations suggest that other response factors than nutrient-phytoplankton-light conditions are important for C_max and that it will be difficult to establish strong relationships between external nutrient loading and C_max. Yearly monitoring for 13-16 years in eight Danish lakes showed considerable year-to-year variability in C_max, which for the individual lakes only related weakly to changes in Secchi depth. The use of C_max as an eutrophication indicator is especially relevant in not very shallow lakes (maximum depth >4-5 m), not too turbid lakes (C_max >1 m) and not very humic lakes (colour <60 mg Pt/l). © 2012 Springer Science+Business Media Dordrecht.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11573/1641162
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