FN Archimer Export Format
PT J
TI Metazoan meiofaunal communities at cold seeps along the Norwegian margin: Influence of habitat heterogeneity and evidence for connection with shallow-water habitats
BT 
AF VAN GAEVER, Saskia
   OLU, Karine
   DERYCKE, Sofie
   VANREUSEL, Ann
AS 1:1;2:2;3:1;4:1;
FF 1:;2:;3:;4:;
C1 Univ Ghent, Marine Biol Sect, Dept Biol, B-9000 Ghent, Belgium.
   IFREMER, Ctr Brest, Dept Environm Profond, F-29280 Plouzane, France.
C2 UNIV GHENT, BELGIUM
   IFREMER, FRANCE
SI BREST
IN WOS Ifremer jusqu'en 2018
   copubli-europe
IF 2.593
TC 52
UR https://archimer.ifremer.fr/doc/2009/publication-7484.pdf
LA English
DT Article
CR VICKING
BO Unknown
DE ;Terschellingia longicaudata;Halomonhystera disjuncta;Cryptic species;Nematodes;Meiobenthos;Cold seeps
AB 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 suboxic conditions, sometimes covered by bacterial mats, (2) sediment colonised by chemosynthetic, siboglinid tubeworms, and (3) sediment outside the influence of seepage and without a large chemosynthetic fauna. Meiofaunal communities varied strongly in terms of generic diversity and dominance among the different habitat types. Control sites and Siboglinidae polychaete fields both supported high nematode genus richness similar to normal deep-sea sediments, whereas the reduced sediments yielded a genus-poor nematode community dominated by one or two successful species. Meiofaunal densities in the different habitats were negatively correlated with macrobenthic densities. An extremely dense (>11,000 ind. 10 cm(-2)), mono-specific nematode population appeared to be restricted to the bacterial mats at HMMV. It consisted of a new cryptic species of the Halomonhystera disjuncta complex, which has been described from intertidal habitats in the North Sea. The reduced seep sediments at Nyegga did not yield H. disjuncta but were dominated by Terschellingia longicaudata, another cosmopolitan nematode species known to be abundant in organic-rich, oxygen-poor, shallow-water environments. These observations point to a past or recent connection between margins and shallow-water habitats.
PY 2009
PD MAY
SO Deep Sea Research Part I: Oceanographic Research Papers
SN 0967-0637
PU Elsevier
VL 56
IS 5
UT 000265737100009
BP 772
EP 785
DI 10.1016/j.dsr.2008.12.015
ID 7484
ER

EF