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• W2334322589 abstract "MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout the JournalEditorsTheme Sections MEPS 517:15-33 (2014) - DOI: https://doi.org/10.3354/meps11015 Deep primary production in coastal pelagic systems: importance for ecosystem functioning Maren Moltke Lyngsgaard1,2,*, Katherine Richardson1, Stiig Markager2, Morten Holtegaard Nielsen3, Michael Olesen4, Jesper Philip Aagaard Christensen2 1Center for Macroecology, Evolution and Climate, Danish Natural History Museum, University of Copenhagen, 2200 Copenhagen, Denmark 2Department of Bioscience, Marine Diversity and Experimental Ecology, Aarhus University, 4000 Roskilde, Denmark 3Arctic Technology Centre, Department of Civil Engineering, Technical University of Denmark, Kemitorvet, Building 204, 2800 Kgs. Lyngby, Denmark 4Department of Marine Biology, Copenhagen University, 3000 Helsingør, Denmark *Corresponding author: marenmo@gmail.com ABSTRACT: Monitoring data (1999 to 2012) and data from a 2 wk field study at a seasonally stratified station in the Aarhus Bight near the Danish coast were used to demonstrate that the vertical distribution of photosynthesis influences both water column oxygen conditions and the fate of the organic material produced. The primary production (PP) occurring below the surface layer, i.e. in the pycnocline-bottom layer (PBL), is shown to contribute significantly to total PP. Oxygen concentrations in the PBL are shown to correlate significantly with the deep primary production (DPP) as well as with salinity, phosphate loading, wind and transparency in the surface layer. The phytoplankton communities detected in the surface layer and PBL during the field study were very different. Large cells, especially Ceratium spp., dominated in the PBL, while small diatoms, mainly Proboscis alata, dominated in surface waters. On the basis of chlorophyll-normalised photosynthetic parameters and variable fluorescence, it is shown that the 2 populations were physiologically distinct. The population in the PBL was photosynthetically active and adapted/acclimated to lower light than the population in the surface layer. Sinking rates (based on sediment trap collections) of carbon and nitrogen were highest in the PBL. Lyngsgaard et al. (2014; Limnol Oceanogr 59:1679-1690) have demonstrated that the vertical distribution of PP in this region is influenced by anthropogenic nutrient loading. Thus, the present study indicates that eutrophication effects may include changes in the structure of planktonic food webs and element cycling in the water column, both brought about through an altered vertical distribution of PP. KEY WORDS: Primary production · Light attenuation · Vertical distribution · Phytoplankton species distribution · Sedimentation · Oxygen concentration Full text in pdf format PreviousNextCite this article as: Lyngsgaard MM, Richardson K, Markager S, Nielsen MH, Olesen M, Christensen JPA (2014) Deep primary production in coastal pelagic systems: importance for ecosystem functioning. Mar Ecol Prog Ser 517:15-33. https://doi.org/10.3354/meps11015 Export citation RSS - Facebook - Tweet - linkedIn Cited by Published in MEPS Vol. 517. Online publication date: December 15, 2014 Print ISSN: 0171-8630; Online ISSN: 1616-1599 Copyright © 2014 Inter-Research." @default.
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• W2334322589 date "2014-12-15" @default.
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• W2334322589 title "Deep primary production in coastal pelagic systems: importance for ecosystem functioning" @default.
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• W2334322589 doi "https://doi.org/10.3354/meps11015" @default.
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