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NameVAN GAEVER S., MOODLEY L., DE BEER D., VANREUSEL A. (2006). Meiobenthos at the Arctic Hakon Mosby Mud Volcano, with a parental-caring nematode thriving in sulphid-rich sediments Marine Ecology Progress Series 321: 143-155
AuthorsVAN GAEVER S., MOODLEY L., DE BEER D., VANREUSEL A.
Year2006
TitleMeiobenthos at the Arctic Hakon Mosby Mud Volcano, with a parental-caring nematode thriving in sulphid-rich sediments
JournalMarine Ecology Progress Series 321: 143-155
Type Publication
NoteNeMys doc_id: 18010
Full textAvailable for editors  PDF available [request]
AbstractHåkon Mosby Mud Volcano (HMMV, SW Barents Sea slope, 1280 m) is one of the numerous cold methane-venting seeps existing along the continental margins. Analyses of videoguided core samples revealed extreme differences in the diversity and density of the metazoan meiobenthic communities associated with the different sub-habitats (centre, microbial mats, Pogonophora field, outer rim) of this mud volcano. Diversity was lowest in the sulphidic, microbial mat sediments that supported the highest standing stock, with unusually high densities (11 000 ind. 10 cm–2) of 1 nematode species related to Geomonhystera disjuncta. Stable carbon isotope analyses revealed that this nematode species was thriving on chemosynthetically derived food sources in these sediments. Ovoviviparous reproduction has been identified as an important adaptation of parents securing the survival and development of their brood in this toxic environment. The proliferation of this single species in exclusive association with free-living, sulphide-oxidising bacteria (Beggiatoa) indicates that its dominance is strongly related to trophic specialisation, evidently uncommon among the meiofauna. This chemoautotrophic association was replaced by copepods in the bare, sulphidefree sediments of the volcano’s centre, dominated by aerobic methane oxidation as the chemosynthetic process. Copepods and nauplii reached maximum densities and dominance in the volcano’s centre (500 ind. 10 cm–2). Their strongly depleted carbon isotope signatures indicated a trophic link with methane-derived carbon. This proliferation of only selected meiobenthic species supported by chemosynthetically derived carbon suggests that, in addition to the sediment geochemistry, the associated reduced meiobenthic diversity may equally be related to the trophic resource specificity in HMMV sub-habitats.
Taxa
(17)
Unreviewed: has not been verified by a taxonomic editorAcantholaimus Allgén, 1933 (additional source)
Checked: verified by a taxonomic editorAstomonema southwardorum Austen, Warwick & Ryan, 1993 (additional source)
Unreviewed: has not been verified by a taxonomic editorChromadorita Filipjev, 1922 (additional source)
Unreviewed: has not been verified by a taxonomic editorDaptonema Cobb, 1920 (additional source)
Unreviewed: has not been verified by a taxonomic editorHalalaimus de Man, 1888 (additional source)
Checked: verified by a taxonomic editorHalomonhystera disjuncta (Bastian, 1865) Andrassy, 2006 (additional source)
Unreviewed: has not been verified by a taxonomic editorLaimella Cobb, 1920 (additional source)
Checked: verified by a taxonomic editorLeptonemella aphanothecae Gerlach, 1950 (additional source)
Unreviewed: has not been verified by a taxonomic editorMetalinhomoeus de Man, 1907 (additional source)
Checked: verified by a taxonomic editorMicrolaimus de Man, 1880 (additional source)
Unreviewed: has not been verified by a taxonomic editorMolgolaimus Ditlevsen, 1921 (additional source)
Unreviewed: has not been verified by a taxonomic editorMonhystera Bastian, 1865 (additional source)
Checked: verified by a taxonomic editorOncholaimus campylocercoides De Coninck & Schuurmans Stekhoven, 1933 (additional source)
Checked: verified by a taxonomic editorParasabatieria punctata Kreis, 1924 accepted as Checked: verified by a taxonomic editorSabatieria pulchra (Schneider, 1906) (additional source)
Unreviewed: has not been verified by a taxonomic editorSabatieria Rouville, 1903 (additional source)
Unreviewed: has not been verified by a taxonomic editorTheristus Bastian, 1865 (additional source)
Unreviewed: has not been verified by a taxonomic editorTricoma Cobb, 1894 (additional source)
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2014-06-18 16:05:08Z  created  Vanaverbeke, Jan
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