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  Utilisation of dissolved organic carbon from different sources by pelagic bacteria in an acidic mining lake

Kamjunke, N., Bohn, C., & Grey, J. (2006). Utilisation of dissolved organic carbon from different sources by pelagic bacteria in an acidic mining lake. Archiv für Hydrobiologie, 165(3), 355-364. doi:10.1127/0003-9136/2006/0165-0355.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-000F-D8D7-B Version Permalink: http://hdl.handle.net/11858/00-001M-0000-000F-D8D8-9
Genre: Journal Article

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Kamjunke_2006.pdf (Publisher version), 125KB
 
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 Creators:
Kamjunke, Norbert, Author
Bohn, Christiane, Author
Grey, Jonathan1, Author              
Affiliations:
1Department Ecophysiology, Max Planck Institute for Limnology, Max Planck Institute for Evolutionary Biology, Max Planck Society, ou_976547              

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Free keywords: bacteria; DOC; primary production; stable isotopes; acidic mining lake
 Abstract: We compared growth rates and efficiencies of pelagic bacteria from an extremely acidic mining lake (pH 2.6, mean depth 4.6m) supplied with different sources of carbon: (1) excreted by phytoplankton, (2) derived from benthic algae, (3) entering the lake via ground water, and (4) leached from leaf litter. Bacteria exhibited high growth rate and efficiency on exudates of pelagic and benthic algae. In contrast, they showed a lower growth rate and efficiency with organic carbon from ground water, and grew at a very high rate but a very low efficiency on leaf leachate. Results from stable isotope analyses indicate a greater importance of benthic exudates and leaf leachate for bacteria in the epilimnion, and a higher impact of ground water sources in the hypolimnion. Given the magnitude of differential source inputs into the lake, we suggest that benthic primary production was the most important carbon source for pelagic bacteria. The benthic-pelagic coupling seems to be more relevant in this shallow acidic lake with low pelagic carbon dioxide concentrations than in neutral lakes.

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Language(s): eng - English
 Dates: 2006-03
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
 Rev. Method: -
 Identifiers: eDoc: 281068
DOI: 10.1127/0003-9136/2006/0165-0355
Other: 2441/S 38488
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Title: Archiv für Hydrobiologie
  Alternative Title : Arch. Hydrobiol.
Source Genre: Journal
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Pages: - Volume / Issue: 165 (3) Sequence Number: - Start / End Page: 355 - 364 Identifier: ISSN: 0003-9136