{"refrec":{"BRefID":228733,"RR":"<b>Pape, E.; van Oevelen, D.; Moodley, L.; Soetaert, K.; Vanreusel, A.</b> (2013). Nematode feeding strategies and the fate of dissolved organic matter carbon in different deep-sea sedimentary environments. <i>Deep-Sea Res., Part 1, Oceanogr. Res. Pap. 80</i>: 94-110. <a href=\"http://dx.doi.org/10.1016/j.dsr.2013.05.018\" target=\"_blank\">http://dx.doi.org/10.1016/j.dsr.2013.05.018</a>","BEntID":220449,"PublicFlag":1,"CheckedFlag":1,"wosflag":1,"vabbflag":1,"RefStringPartII":". <i>Deep-Sea Res., Part 1, Oceanogr. Res. Pap. 80</i>: 94-110. <a href=\"http://dx.doi.org/10.1016/j.dsr.2013.05.018\" target=\"_blank\">http://dx.doi.org/10.1016/j.dsr.2013.05.018</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Pape, E.; van Oevelen, D.; Moodley, L.; Soetaert, K.; Vanreusel, A.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Pape, E. <i>et al.</i>","Englishabstract":"Sediments sampled from the Galicia Bank seamount and the adjacent slope (northeast Atlantic), and from a western Mediterranean slope site, were injected onboard with <sup>13</sup>C-enriched dissolved organic matter (DOM) to evaluate nematode feeding strategies and the fate of DOM carbon in different benthic environments. We hypothesized that nematode <sup>13</sup>C label assimilation resulted from either direct DOM uptake or feeding on <sup>13</sup>C labeled bacteria. Slope sediments were injected with glucose (“simple” DOM) or “complex” diatom-derived DOM to investigate the influence of DOM composition on carbon assimilation.</p><p id=\"sp0100\">The time-series (1, 7 and 14 days) experiment at the seamount site was the first study to reveal a higher <sup>13</sup>C enrichment of nematodes than bacteria and sediments after 7 days. Although isotope dynamics indicated that both DOM and bacteria were plausible candidate food sources, the contribution to nematode secondary production and metabolic requirements (estimated from biomass-dependent respiration rates) was higher for bacteria than for DOM at all sites. The seamount nematode community showed higher carbon assimilation rates than the slope assemblages, which may reflect an adaptation to the food-poor environment. Our results suggested that the trophic importance of bacteria did not depend on the amount of labile sedimentary organic matter. Furthermore, there was a discrepancy between carbon assimilation rates observed in the experiments and the feeding type classification, based on buccal morphology. Sites with a similar feeding type composition (i.e. the northeast Atlantic sites) showed large differences in uptake, whilst the nematode assemblages at the two slope sites, which had a differing trophic structure, took up similar amounts of the DOM associated carbon.</p><p id=\"sp0105\">Our results did not indicate substantial differences in carbon processing related to the complexity of the DOM substrate. The quantity of processed carbon (5–42% of added DOM) was determined by the bacteria, and was primarily respired. The bulk of the added <sup>13</sup>C-DOM was not ingested by the benthic biota under study, and a considerable fraction was possibly adsorbed onto the sediment grains.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Nematode feeding strategies and the fate of dissolved organic matter carbon in different deep-sea sedimentary environments","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2026-04-18 01:31:35.533146","timezone_type":1,"timezone":"+02:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":"Deep-sea nematodes","OtherDescriptors":null,"Notes":null,"AnaPub":2013,"MonPub":null,"DateUpdate":"2016-11-09","DateCreate":"2013-09-11","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000324227700010","VABBcode":null,"OpenAcc":0,"DOI":"10.1016/j.dsr.2013.05.018"},"refs":null,"anarec":{"AnaID":228733,"PubliDate":2013,"Pagination":"94-110","XtraPublOfAnaID":null,"ISBN":null,"Volume":"80","Issue":null,"BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":45506,"SerRR":"Deep-Sea Research, Part I. 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