Publikation:

Trophic structure and carbon flow dynamics in the pelagic community of a large lake

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Datum

1996

Autor:innen

Gaedke, Ursula
Pahl-Wostl, Claudia

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Published

Erschienen in

POLIS, Gary A., ed.. Food webs. Chapman & Hall, 1996, pp. 60-71. Available under: doi: 10.1007/978-1-4615-7007-3_6

Zusammenfassung

Understanding the flow and cycling of matter within food webs is a major objective of contemporary ecosystem research (e. g . , Wulff et al. (1989) and literature cited therein). A number of investigations on carbon (C) cycling in pelagic ecosystems focused on the role of the microbial loop (e.g., Ducklow et al. (1986), Jackson and Eldridge (1992), and Stone et al. (1993)). The present case study from large and deep Lake Constance aims to contribute to this partially controversial issue by evaluating separately the contribution of the microbial community to the nutrition of large zooplankton (i.e., the link-sink issue), and to the overall C flow dynamics. This is done by aggregating all species from the entire food web into two separate chains, one based directly on phytoplankton (called gruzing chain in the following), and one relying energetically on dead organic matter taken up by osmotrophic bacteria (detritus chain). The organismal composition and the relative quantitative significance of both chains will be compared. Perceiving the food web as being composed of these two chains approximates the concept of distinguishing between a classical pelagic food chain (going from phytoplankton via crustaceans to fish) and a microbial loop. However, in contrast to the latter concept, we account explicitly for flows into and from the pool of dead organic material.

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Fachgebiet (DDC)
570 Biowissenschaften, Biologie

Schlagwörter

trophic structure, carbon flow, diet compositions, pelagic community

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undefined / . - undefined, undefined

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ISO 690GAEDKE, Ursula, Dietmar STRAILE, Claudia PAHL-WOSTL, 1996. Trophic structure and carbon flow dynamics in the pelagic community of a large lake. In: POLIS, Gary A., ed.. Food webs. Chapman & Hall, 1996, pp. 60-71. Available under: doi: 10.1007/978-1-4615-7007-3_6
BibTex
@incollection{Gaedke1996Troph-6598,
  year={1996},
  doi={10.1007/978-1-4615-7007-3_6},
  title={Trophic structure and carbon flow dynamics in the pelagic community of a large lake},
  publisher={Chapman & Hall},
  booktitle={Food webs},
  pages={60--71},
  editor={Polis, Gary A.},
  author={Gaedke, Ursula and Straile, Dietmar and Pahl-Wostl, Claudia}
}
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