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- W2031279474 abstract "AB Aquatic Biology Contact the journal Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout the JournalEditorsTheme Sections AB 7:71-80 (2009) - DOI: https://doi.org/10.3354/ab00185 Microbial degradation of cold-water coral-derived organic matter: potential implication for organic C cycling in the water column above Tisler Reef Christian Wild1,*, Laura M. Wehrmann1,2, Christoph Mayr3, Sandra I. Schöttner1,2, Elke Allers2, Tomas Lundälv4 1Coral Reef Ecology Group (CORE), 3GeoBio-Center & Department of Earth and Environmental Sciences, Ludwig-Maximilians Universität, Richard-Wagner-Str. 10, 80333 Munich, Germany 2Max Planck Institute for Marine Microbiology, Celsiusstr. 1, 28359 Bremen, Germany 4Sven Loven Centre for Marine Sciences, Tjärnö University of Gothenburg, 452 96 Strömstad, Sweden *Email: c.wild@lrz.uni-muenchen.de ABSTRACT: Cold-water corals release organic matter, in particular mucus, but its role in the ecological functioning of reef ecosystems is still poorly understood. The present study investigates the planktonic microbial degradation of mucus released by Lophelia pertusa colonies from Tisler Reef, Skagerrak. Results are compared to the degradation of dissolved and particulate organic substrates, including the carbohydrates glucose and starch, as well as gum xanthan and the cyanobacterium Spirulina spp. as the model organism for phytoplankton. Resulting microbial organic C degradation rates for the dissolved fraction of L. pertusa-derived mucus showed nearly linear progression over time and revealed similar degradation rates compared to glucose and starch. Degradation of the particulate mucus fraction, in contrast, displayed exponential progression and was much faster than degradation of the dissolved fraction. In addition, particulate mucus degradation showed a 4-fold increase compared to that of the added Spirulina spp. suspension. Mucus-associated microbial communities apparently play a key role in organic matter recycling, as degradation rates more than doubled in untreated compared to sterile coral-derived mucus over 3 d of incubation. Quantification of O2 consumption in the water column above Tisler Reef showed significantly increased values in the direct vicinity of the reef. C-stable isotope signatures of suspended particulate organic matter close to Tisler were close to those of L. pertusa-derived mucus, and high dissolved organic carbon (DOC) concentrations were detected above Tisler Reef. These findings demonstrate the stimulating effect of cold-water coral reefs on microbial activity in the adjacent water column and may indicate some control over organic C cycling. KEY WORDS: Cold-water coral reefs · Lophelia pertusa · Coral-derived mucus · Microbial degradation · O2 consumption · DOC dynamics · Carbon cycle Full text in pdf format PreviousNextCite this article as: Wild C, Wehrmann LM, Mayr C, Schöttner SI, Allers E, Lundälv T (2009) Microbial degradation of cold-water coral-derived organic matter: potential implication for organic C cycling in the water column above Tisler Reef. Aquat Biol 7:71-80. https://doi.org/10.3354/ab00185 Export citation RSS - Facebook - Tweet - linkedIn Cited by Published in AB Vol. 7, No. 1-2. Online publication date: October 01, 2009 Print ISSN: 1864-7782; Online ISSN: 1864-7790 Copyright © 2009 Inter-Research." @default.
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- W2031279474 title "Microbial degradation of cold-water coral-derived organic matter: potential implication for organic C cycling in the water column above Tisler Reef" @default.
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