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  Phytoplankton species composition in the chemocline of mesotrophic lakes

Adler, M., Gervais, F., & Siedel, U. (2000). Phytoplankton species composition in the chemocline of mesotrophic lakes.

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Item Permalink: https://hdl.handle.net/11858/00-001M-0000-000F-DFD7-F Version Permalink: https://hdl.handle.net/11858/00-001M-0000-000F-DFD9-B
Genre: Conference Paper

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 Creators:
Adler, Maren1, Author           
Gervais, Frank, Author
Siedel, Ulrike, Author
Affiliations:
1Working Group Tropical Ecology, Max Planck Institute for Limnology, Max Planck Institute for Evolutionary Biology, Max Planck Society, 976549              

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 Abstract: The vertical distribution of phytoplankton was studied in 16 mesotrophic to slightly eutrophic, small and usually dimictic lakes in north-eastern Germany in 1996. All lakes were characterized by an anaerobic hypolimnion in summer. 14 lakes had a total phosphorus concentration >20 mug l-1 in the summer chemocline and were characterized by a deep chlorophyll maximum (DCM) in that layer. Two lakes with lower total phosphorus concentration in the chemocline had no DCM. The DCM was caused by the high biovolume of populations from a group of 11 different cyanobacterial or cryptophyte species that were never observed in the epilimnion. Pseudanabaena catenata and Cryptomonas phaseolus were most widespread in the chemocline. The DCM was in contact with sulphide. Algal biomass in the chemocline was positively correlated with total phosphorus concentration in the chemocline. The percentage of the biovolume of filamentous cyanobacteria in the chemocline increased with increasing total phosphorus concentration, reaching 100 % when the P concentration was >60 mug l-1. The biovolume of cryptophytes reached a higher percentage only at lower P concentration. When the light supply of the chemocline was above average of the studied lakes however, the percentage of filamentous cyanobacteria was lower than predicted from P concentration and cryptophytes were co-dominant.

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Language(s): eng - English
 Dates: 2000-02
 Publication Status: Issued
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: eDoc: 516787
Other: 1852/S 37499
 Degree: -

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Title: Kinneret Symposium
Place of Event: Ginnosar, Israel
Start-/End Date: 1998-09 - 1998-09

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Source 1

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Title: Limnology and Lake Management 2000+
Source Genre: Issue
 Creator(s):
Berman, Tom, Editor
Hambright, K. David, Editor
Gat, Joel, Editor
Gafny, Sarig, Editor
Sukenik, Assaf, Editor
Tilzer, Max, Editor
Affiliations:
-
Publ. Info: -
Pages: XIV, 593 S. Volume / Issue: - Sequence Number: - Start / End Page: 513 - 530 Identifier: ISBN: 3-510-47057-5

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Title: Archiv für Hydrobiologie / Advances in Limnology
  Alternative Title : Arch. Hydrobiol. Spec. Issues Advanc. Limnol.
Source Genre: Journal
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Publ. Info: -
Pages: XIV, 593 S. Volume / Issue: 55 Sequence Number: - Start / End Page: - Identifier: ISSN: 0071-1128