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Deep-Sea Nematodes of the Mozambique Channel: Evidence of Random Community Assembly Dynamics in Seep Sediments 5
Macheriotou, Lara; Rigaux, Annelien; Olu, Karine; Zeppilli, Daniela; Derycke, Sofie; Vanreusel, Ann.
Cold seeps occur globally in areas where gases escape from the seafloor, occasionally resulting in the formation of topographic depressions (pockmarks), characterised by unique physicochemical conditions such as anoxic and sulphuric sediments. Free-living marine nematodes tend to dominate the meiofaunal component in such environments, often occurring at extremely high densities and low richness; the mechanisms defining community assembly in areas of fluid seepage, however, have received little attention. Here we focus on a low-activity pockmark at 789 m in the Mozambique Channel (MC). We assessed the diversity, co-occurrence patterns and phylogenetic community structure of nematodes at this bathyal site to that of a nearby reference area as well as abyssal...
Tipo: Text Palavras-chave: Cold seeps; Nematoda; Metabarcoding; Community structure; Phylogenetic community structure.
Ano: 2021 URL: https://archimer.ifremer.fr/doc/00679/79080/81524.pdf
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Metazoan meiofaunal communities at cold seeps along the Norwegian margin: Influence of habitat heterogeneity and evidence for connection with shallow-water habitats 5
Van Gaever, Saskia; Olu, Karine; Derycke, Sofie; Vanreusel, Ann.
Cold-seep environments and their associated symbiont-bearing megafaunal communities create islands of primary production for macro- and meiofauna in the otherwise monotonous and nutrient-poor deep-sea environment. To examine the spatial variation and distribution patterns of metazoan meiobenthos in different seepage-related habitats, samples were collected in two regions off Norway: several pockmarks associated with the Storegga Slide including the Nyegga pockmark area (730 m: 64 degrees N), and the active, methane-venting Hakon Mosby Mud Volcano (HMMV) west of the Barents Sea (1280 m: 72 degrees N). Based on sediment geochemistry and associated epifauna, three different habitat types were distinguished across the two regions: (1) reduced sediment with...
Tipo: Text Palavras-chave: Terschellingia longicaudata; Halomonhystera disjuncta; Cryptic species; Nematodes; Meiobenthos; Cold seeps.
Ano: 2009 URL: http://archimer.ifremer.fr/doc/2009/publication-7484.pdf
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