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Seasonal ecosystem metabolism across shallow benthic habitats measured by aquatic eddy covariance
Stockholm University, Faculty of Science, Stockholm University Baltic Sea Centre. University of Helsinki, Finland.
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Number of Authors: 62019 (English)In: Limnology and oceanography letters, ISSN 2378-2242, Vol. 4, no 3, p. 79-86Article in journal (Refereed) Published
Abstract [en]

Shallow benthic habitats are hotspots for carbon cycling and energy flow, but metabolism (primary production and respiration) dynamics and habitat-specific differences remain poorly understood. We investigated daily, seasonal, and annual metabolism in six key benthic habitats in the Baltic Sea using similar to 2900h of in situ aquatic eddy covariance oxygen flux measurements. Rocky substrates had the highest metabolism rates. Habitat-specific annual primary production per m(2) was in the order Fucus vesiculosus canopy>Mytilus trossulus reef>Zostera marina canopy>mixed macrophytes canopy>sands, whereas respiration was in the order M. trossulus>F. vesiculosus>Z. marina>mixed macrophytes> sands>aphotic sediments. Winter metabolism contributed 22-31% of annual rates. Spatial upscaling revealed that benthic habitats drive >90% of ecosystem metabolism in waters <= 5 m depth, highlighting their central role in carbon and nutrient cycling in shallow waters.

Place, publisher, year, edition, pages
2019. Vol. 4, no 3, p. 79-86
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Biological Sciences
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URN: urn:nbn:se:su:diva-169229DOI: 10.1002/lol2.10107ISI: 000467401100004OAI: oai:DiVA.org:su-169229DiVA, id: diva2:1326629
Available from: 2019-06-18 Created: 2019-06-18 Last updated: 2019-08-30Bibliographically approved

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