Carbon flows in the benthic food web at the deep-sea observatory HAUSGARTEN (Fram Strait)

D. Van Oevelen, M. Bergmann, K.E.R. Soetaert, E. Bauerfeind, C. Hasemann, M. Klages, I. Schewe, T. Soltwedel, N.E. Budaeva

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    Abstract

    The HAUSGARTEN observatory is located in the eastern Fram Strait (Arctic Ocean) and used as long-term monitoring site to follow changes in the Arctic benthic ecosystem. Linear inverse modelling was applied to decipher carbon flows among the compartments of the benthic food web at the central HAUSGARTEN station (2500 m) based on an empirical data set consisting of data on biomass, prokaryote production, total carbon deposition and community respiration. The model resolved 99 carbon flows among 4 abiotic and 10 biotic compartments, ranging from prokaryotes up to megafauna. Total carbon input was 3.78±0.31 mmol C m−2 d−1, which is a comparatively small fraction of total primary production in the area. The community respiration of 3.26±0.20 mmol C m−2 d−1 is dominated by prokaryotes (93%) and has lower contributions from surface-deposit feeding macro- (1.7%) and suspension feeding megafauna (1.9%), whereas contributions from nematode and other macro- and megabenthic compartments were limited to
    Original languageEnglish
    Pages (from-to)1069-1083
    JournalDeep Sea Research Part I-Oceanographic Research Papers
    Volume58
    Issue number11
    DOIs
    Publication statusPublished - 2011

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