Format:
1 Online-Ressource (90 Seiten, 15100 KB)
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Illustrationen, Diagramme
Content:
Microbial processing of organic matter (OM) in the freshwater biosphere is a key component of global biogeochemical cycles. Freshwaters receive and process valuable amounts of leaf OM from their terrestrial landscape. These terrestrial subsidies provide an essential source of energy and nutrients to the aquatic environment as a function of heterotrophic processing by fungi and bacteria. Particularly in freshwaters with low in-situ primary production from algae (microalgae, cyanobacteria), microbial turnover of leaf OM significantly contributes to the productivity and functioning of freshwater ecosystems and not least their contribution to global carbon cycling. Based on differences in their chemical composition, it is believed that leaf OM is less bioavailable to microbial heterotrophs than OM photosynthetically produced by algae. Especially particulate leaf OM, consisting predominantly of structurally complex and aromatic polymers, is assumed highly resistant to enzymatic breakdown by microbial heterotrophs. However, recent research has demonstrated that OM produced by algae promotes the heterotrophic breakdown of leaf OM in aquatic ecosystems, with profound consequences for the metabolism of leaf carbon (C) within microbial food webs. [...]
Note:
Kumulative Dissertation
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Dissertation Potsdam, Universität Potsdam 2018
Additional Edition:
Erscheint auch als Druck-Ausgabe Fabian, Jenny Effects of algae on microbial carbon cycling in freshwaters Potsdam, 2018
Language:
English
Keywords:
Biomasse
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Mikrobieller Abbau
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Hochschulschrift
DOI:
10.25932/publishup-42222
URN:
urn:nbn:de:kobv:517-opus4-422225
URL:
https://nbn-resolving.org/urn:nbn:de:kobv:517-opus4-422225
URL:
https://d-nb.info/1218404299/34
Author information:
Grossart, Hans-Peter 1965-
Author information:
Küsel, Kirsten 1965-
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