2011
DOI: 10.1128/aem.01507-10
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Microbial Community Composition and Function in Permanently Cold Seawater and Sediments from an Arctic Fjord of Svalbard

Abstract: Heterotrophic microbial communities in seawater and sediments metabolize much of the organic carbon produced in the ocean. Although carbon cycling and preservation depend critically on the capabilities of these microbial communities, their compositions and capabilities have seldom been examined simultaneously at the same site. To compare the abilities of seawater and sedimentary microbial communities to initiate organic matter degradation, we measured the extracellular enzymatic hydrolysis rates of 10 substrat… Show more

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Cited by 124 publications
(122 citation statements)
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References 82 publications
(104 reference statements)
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“…Phytoplankton biomass (i.e., OM from primary production), is an important component of sinking OM and faecal pellets are another source). However, the contribution of ancient OM to sinking OM and, thus, its link to benthic ecosystem functioning and biogeochemical cycling in the benthic layer has not been considered in this Arctic marine system hitherto (Teske et al 2011). Generally, ancient OM is thought to be much less degradable than fresh marine OM.…”
Section: Discussionmentioning
confidence: 99%
“…Phytoplankton biomass (i.e., OM from primary production), is an important component of sinking OM and faecal pellets are another source). However, the contribution of ancient OM to sinking OM and, thus, its link to benthic ecosystem functioning and biogeochemical cycling in the benthic layer has not been considered in this Arctic marine system hitherto (Teske et al 2011). Generally, ancient OM is thought to be much less degradable than fresh marine OM.…”
Section: Discussionmentioning
confidence: 99%
“…as in transects covering riverine-to-marine conditions (Ziervogel and Arnosti, 2009) have demonstrated that the capacity for pelagic microbial communities to hydrolyze a suite of complex substrates varies considerably, differences that may be correlated to differences in microbial community composition (Teske et al, 2011;D'Ambrosio et al, 2014). Factors that may drive differences in bacterial community structure and activities at the investigated sites include differences in freshwater influence due to the location of the three sites relative to the river mouth (Liu and Liu, 2015).…”
Section: Patterns Of Microbial Activities: Links To Organic Mattermentioning
confidence: 99%
“…The degradation of organic matter mainly relies on microbial communities and extracellular enzymes (enzymes outside microbial cell membranes) produced by them (Sinsabaugh and Foreman, 2001;Sinsabaugh et al, 2009). Thus far, the studies on extracellular enzymes activities (EEA) have been mainly associated with organic matter degradation by microbes (Teske et al, 2011;Alvarez and Guerrero, 2000;Hiroki et al, 2007) and nutrient limitation (Hill et al, 2012;Hill et al, 2010). Furthermore, EEA was also used to reflect the different trophic status of shallow lakes (Caruso et al, 2005;Kalwasinska and Brzezinska, 2013;Ziervogel et al, 2014) and estimate degradation rates (Jackson et al, 1995;Alvarez and Guerrero, 2000;Sciessere et al, 2011) and turnover times (Misic and Harriague, 2009) of organic matter.…”
Section: Tablementioning
confidence: 99%