Details zur Publikation

Referenztyp Zeitschriften
DOI / URL Link
Titel (primär) Lake morphometry and wind exposure may shape the plankton community structure in acidic mining lakes. Dedicated to Prof. Dr. Walter Geller on the occasion of his 65th birthday anniversary
Autor Weithoff, G.; Moser, M.; Kamjunke, N.; Gaedke, U.; Weisse, T.;
Journal / Serie Limnologica
Erscheinungsjahr 2010
Department FLOEK;
Band/Volume 40
Heft 2
Sprache englisch;
Keywords Acidic lake; Mining lake; Plankton; Mixotrophy; Rotifers; Flagellates; Ochromonas; Lepocinclis; Chlamydomonas; Deep chlorophyll maximum
Abstract Acidic mining lakes (pH <3) are specific habitats exhibiting particular chemical and biological characteristics. The species richness is low and mixotrophy and omnivory are common features of the plankton food web in such lakes. The plankton community structure of mining lakes of different morphometry and mixing type but similar chemical characteristics (Lake 130, Germany and Lake Langau, Austria) was investigated. The focus was laid on the species composition, the trophic relationship between the phago-mixotrophic flagellate Ochromonas sp. and bacteria and the formation of a deep chlorophyll maximum along a vertical pH-gradient. The shallow wind-exposed Lake 130 exhibited a higher species richness than Lake Langau. This increase in species richness was made up mainly by mero-planktic species, suggesting a strong benthic/littoral - pelagic coupling. Based on the field data from both lakes, a nonlinear, negative relation between bacteria and Ochromonas biomass was found, suggesting that at an Ochromonas biomass below 50 µg C L-1, the grazing pressure on bacteria is low and with increasing Ochromonas biomass bacteria decline. Furthermore, in Lake Langau, a prominent deep chlorophyll maximum was found with chlorophyll concentrations ca. 50 times higher than in the epilimnion which was build up by the euglenophyte Lepocinclis sp. We conclude that lake morphometry, and specific abiotic characteristics such as mixing behaviour influence the community structure in these mining lakes.
ID 10651
dauerhafte UFZ-Verlinkung https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=10651
Weithoff, G., Moser, M., Kamjunke, N., Gaedke, U., Weisse, T. (2010):
Lake morphometry and wind exposure may shape the plankton community structure in acidic mining lakes. Dedicated to Prof. Dr. Walter Geller on the occasion of his 65th birthday anniversary
Limnologica 40 (2), 161 - 166