{"refrec":{"BRefID":209917,"RR":"<b>Hauquier, F.; Ingels, J.; Gutt, J.; Raes, M.; Vanreusel, A.</b> (2011). Characterisation of the nematode community of a low-activity cold seep in the recently ice-shelf free Larsen B area, Eastern Antarctic Peninsula. <i>PLoS One 6(7)</i>: e22240. <a href=\"http://dx.doi.org/10.1371/journal.pone.0022240\" target=\"_blank\">dx.doi.org/10.1371/journal.pone.0022240</a>","BEntID":201889,"PublicFlag":1,"CheckedFlag":1,"wosflag":1,"vabbflag":1,"RefStringPartII":". <i>PLoS One 6(7)</i>: e22240. <a href=\"https://dx.doi.org/10.1371/journal.pone.0022240\" target=\"_blank\">https://dx.doi.org/10.1371/journal.pone.0022240</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Hauquier, F.; Ingels, J.; Gutt, J.; Raes, M.; Vanreusel, A.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Hauquier, F. <i>et al.</i>","Englishabstract":"Background: Recent climate-induced ice-shelf disintegration in the Larsen A (1995) and B (2002) areas along the Eastern Antarctic Peninsula formed a unique opportunity to assess sub-ice-shelf benthic community structure and led to the discovery of unexplored habitats, including a low-activity methane seep beneath the former Larsen B ice shelf. Since both limited particle sedimentation under previously permanent ice coverage and reduced cold-seep activity are likely toinfluence benthic meiofauna communities, we characterised the nematode assemblage of this low-activity cold seep and compared it with other, now seasonally ice-free, Larsen A and B stations and other Antarctic shelf areas (Weddell Sea and Drake Passage), as well as cold-seep ecosystems world-wide.Principal Findings: The nematode community at the Larsen B seep site differed significantly from other Antarctic sites in terms of dominant genera, diversity and abundance. Densities in the seep samples were high (.2000 individuals per 10 cm<sup>2</sup>) and showed below-surface maxima at a sediment depth of 2–3 cm in three out of four replicates. All samples were dominated by one species of the family Monhysteridae, which was identified as a <i>Halomonhystera</i> species that comprised between 80 and 86% of the total community. The combination of high densities, deeper density maxima and dominance of one species is shared by many cold-seep ecosystems world-wide and suggested a possible dependence upon a chemosynthetic food source. Yet stable 13<sub>C</sub> isotopic signals (ranging between 221.9760.86% and 224.8561.89%) were indicative of a phytoplankton-derived food source.Conclusion: The recent ice-shelf collapse and enhanced food input from surface phytoplankton blooms were responsible for the shift from oligotrophic pre-collapse conditions to a phytodetritus-based community with high densities and low diversity. The parthenogenetic reproduction of the highly dominant <i>Halomonhystera</i> species is rather unusual for marine nematodes and may be responsible for the successful colonisation by this single species.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Characterisation of the nematode community of a low-activity cold seep in the recently ice-shelf free Larsen B area, Eastern Antarctic Peninsula","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2024-12-10 01:33:17.368041","timezone_type":1,"timezone":"+01:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":null,"OtherDescriptors":null,"Notes":null,"AnaPub":2011,"MonPub":null,"DateUpdate":"2017-03-15","DateCreate":"2011-11-25","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000292931200036","VABBcode":null,"OpenAcc":1,"DOI":"10.1371/journal.pone.0022240"},"refs":null,"anarec":{"AnaID":209917,"PubliDate":2011,"Pagination":"e22240","XtraPublOfAnaID":null,"ISBN":null,"Volume":"6","Issue":"7","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":123954,"SerRR":"PLoS One. 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