Seasonal ecosystem variability in remote mountain lakes: implications for detecting climatic signals in sediment records

0150507 - HBU-Z 20023143 RIV NL eng J - Journal Article
Catalan, J. - Ventura, M. - Brancelj, A. - Granados, I. - Thies, H. - Nickus, U. - Korhola, A. - Lotter, A. F. - Barbieri, A. - Stuchlik, E. - Lien, L. - Bitušík, P. - Buchaca, T. - Camarero, L. - Goudsmit, G. H. - Kopáček, Jiří - Lemcke, G. - Livingstone, D. M. - Müller, B. - Rautio, M. - Šiško, M. - Sorvari, S. - Šporka, F. - Strunecký, O. - Toro, M.
Seasonal ecosystem variability in remote mountain lakes: implications for detecting climatic signals in sediment records.
Journal of Paleolimnology. Roč. 28, č. 1 (2002), s. 25-46. ISSN 0921-2728. E-ISSN 1573-0417
Grant - others:EC(XE) MOLAR ENV4 CT95 0007; Swiss FOES(XE) 95.0518-1
Keywords : alpine lakes * chlorophyll * thermal regime
Subject RIV: DA - Hydrology ; Limnology
Impact factor: 1.731, year: 2002

The main patterns of seasonal variability in the ecosystems of nine lakes in Europe are discussed with the implications for recording climatic features in their sediments. Despite the diversity in latitude and size, the lakes showed a number of common features. They were phosphorus limited, ice-covered between 5-9 months, and all but one were dimictic. Two types of lakes were distinguished according to the number of production peaks during the ice-free season. Lakes with longer summer stratification tended to have two productive periods: one at the onset of stratification, and the other during the autumn overturn. Lakes with shorter stratification had single peak during the ice-free period. All lakes presented deep chlorophyll maxima during summer stratification, and subsurface chlorophyll maxima beneath the ice. The major chemical components showed a short but extreme dilution during thawing. Certain lake features may favour the recording of particular climatic fluctuations.
Permanent Link: http://hdl.handle.net/11104/0048039