02433nas a2200241   4500008004100000245012500041210006900166260005200235300001200287490000700299520157400306653001101880653001701891653001501908653001601923653001401939653001001953100002701963700002201990700001902012700002302031856013702054       2009                        eng d00aMeiofaunal (re)colonization of the Arctic intertidal (Hornsund, Spitsbergen) after ice melting: role of wrack deposition0 aMeiofaunal recolonization of the Arctic intertidal Hornsund Spit  a233 SPRING ST, NEW YORK, NY 10013 USAbSPRINGER  a243-2520 v323 aIntertidal meiobenthos of Hornsund-the southernmost fjord of Spitsbergen-was investigated between July and September 2005. Mean total meiofaunal densities ranged between 4.3 and 328 ind. 10 cm(-2). Nematode assemblages were impoverished in terms of the number of genera when compared with those from the western Spitsbergen coast (11 vs. 25-28 genera in total, respectively). It is suggested that severe environmental conditions in the southern part of Spitsbergen overcome the adaptation skills of many nematode species and hamper the establishment of a diverse community. Comparatively high nematode numbers on a beach subject to heavy macroalgal wrack input contrast sharply with numerically poor communities in sparse-wrack beaches (up to 315 vs. 31 ind. 10 cm(-2), respectively). It is suggested that the wrack input to the Arctic beach may substantially influence the richness and composition of the intertidal meiobenthic community. Nematode assemblages were dominated by extreme colonizers: Geomonhystera disjuncta and rhabditids. Their relatively high densities in beach sediments recorded at the beginning of July indicate their ability to recover rapidly after the winter period and to effective (re)colonization of the intertidal habitat just after the ice melt. Average concentration of rhabditids and monhysterids associated with macroalgal wrack deposited on the upper shore was as high as 52 x 10(3) individuals per gram of the substrate. It is hypothesized that nematodes can play a substantial role in the wrack decomposition in the Arctic intertidal.10aArctic10aColonization10aIntertidal10aMeiobenthos10anematodes10aWrack1 aUrban-Malinga, Barbara1 aDrgas, Aleksander1 aAmeryk, Anetta1 aTatarek, Agnieszka  uhttps://nematoda.myspecies.info/content/meiofaunal-recolonization-arctic-intertidal-hornsund-spitsbergen-after-ice-melting-role-wrac02205nas a2200253   4500008004100000245011500041210006900156260005200225300001400277490000700291520130800298653001701606653001701623653001401640653001301654653002101667653002201688653001901710100002201729700002101751700001701772700002501789856013701814       2009                        eng d00aYermak Plateau revisited: spatial and temporal patterns of meiofaunal assemblages under permanent ice-coverage0 aYermak Plateau revisited spatial and temporal patterns of meiofa  a233 SPRING ST, NEW YORK, NY 10013 USAbSPRINGER  a1159-11760 v323 aBenthic sampling between 1997 and 2006 on the Yermak Plateau, a permanently ice-covered submarine peninsula northwest of Svalbard, exhibited regional differences with generally higher meiofauna numbers in southern and western parts (similar to 2,250-2,300 ind. 10 cm(-2) in the south-west, compared with similar to similar to 1,200-1,350 ind. 10 cm(-2) in the north-east). Distribution patterns suggest a current-driven lateral input of POM, produced in the high-productive Marginal Ice Zone, with increased intensity along the western slope of the plateau. Significant correlations between comparably 'fresh' sediment-bound phytodetritus and the taxonomic composition of meiofauna assemblages indicate that food quality decisively affects the community structure. The long-term development of meiobenthic communities showed no clear trend; however, a comparison of summer and winter data exhibited higher meiofauna densities and a more diverse composition in July samples. The predominance of small nematodes in the summer samples might point to reproductive activities stimulated by increased food availability. The taxonomic composition of nematode assemblages showed distinct regional differences, thereby indicating more stable environmental conditions in north-eastern parts of the Yermak Plateau.10aArctic Ocean10aForaminifera10ameiofauna10aNematoda10aSpatial patterns10aTemporal patterns10aYermak Plateau1 aSoltwedel, Thomas1 aMokievsky, Vadim1 aSchewe, Ingo1 aHasemann, Christiane  uhttps://nematoda.myspecies.info/content/yermak-plateau-revisited-spatial-and-temporal-patterns-meiofaunal-assemblages-under-permanen02499nas a2200217   4500008004100000245007000041210006900111260005200180300001400232490000700246520176100253653001902014653002602033653001702059653001302076653002702089653002202116100002102138700002202159856010002181       2009                        eng d00aRegional patterns of nematode assemblages in the Arctic deep seas0 aRegional patterns of nematode assemblages in the Arctic deep sea  a233 SPRING ST, NEW YORK, NY 10013 USAbSPRINGER  a1345-13570 v323 aSurface primary productivity and carbon flux in the Arctic Seas are higher along the warm Spitsbergen Water Current than along the ice-infested East Greenland Current. These contrasting oceanographic conditions are reflected in the deep-sea environment and may shape nematode assemblages. However, the paucity of samples in the Arctic deep seas precludes any regional scale assessment. In the present study, nematode assemblages were investigated in relation to a range of environmental variables along the 2,000 m isobath between latitudes 72A degrees N and 79A degrees N for both East and Western margins of the northern North Atlantic. Results showed that both margins had distinct environmental characteristics, with respect to chloroplastic pigments, sediment water content, sediment-bound organic matter, phospholipids and particulate proteins. Nematode assemblages varied according to these environmental changes. Along the more oligotrophic western margin, chloroplastic pigments increased towards the North, while the other environmental variables, nematode abundances and species richness decreased. In contrast, along the eastern margin, we observed higher quantities of organic matter and particulate protein, which supported higher abundance and species richness. Nematode assemblages along both margins varied according to food availability with species composition more variable in areas with lower amounts. Seventy percent of the species occurred in both margins indicating a low turnover of species. The present results support the hypothesis of a positive latitudinal gradient across the North Atlantic and further suggest that contemporary climate and recent ecological processes may predict nematode diversity patterns at larger scales.10aArctic benthos10aArctic marine ecology10abiogeography10adeep sea10aLatitudinal variations10aspecies diversity1 aFonseca, Gustavo1 aSoltwedel, Thomas  uhttps://nematoda.myspecies.info/content/regional-patterns-nematode-assemblages-arctic-deep-seas00556nas a2200121   4500008004100000245012200041210006900163300001200232490000700244100002600251700002000277856013700297       2002                        eng d00aMeiofauna distribution in {Martel Inlet, King George Island (Antarctica)}: sediment features versus food availability0 aMeiofauna distribution in Martel Inlet King George Island Antarc  a126-1340 v251 ade Skowronski, R.S.P.1 aCorbisier, T.N.  uhttps://nematoda.myspecies.info/content/meiofauna-distribution-martel-inlet-king-george-island-antarctica-sediment-features-versus-f