02016nas a2200205   4500008004100000245012200041210006900163260006800232300001200300490000700312520122100319653002401540653002501564653001401589653002201603100002101625700001201646700001501658856013701673       2006                        eng d00aPatterns of nematode populations in the southwestem North Sea and their link to other components of the benthic fauna0 aPatterns of nematode populations in the southwestem North Sea an  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BV  a113-1270 v553 aThis article describes the major features of nematode assemblages collected at 19 stations in the southwestern North Sea and identifies dominant species within communities in relation to environmental parameters and anthropogenic activities. Patterns observed for meiobenthic nematodes were compared with those from larger-sized benthic fauna. Correlation analyses of nematode populations with the varied substrate occurring in the study area revealed that locations with similar sediment type and water depth were also most similar faunistically. The combined analysis of different faunal groups showed a notable similarity between species distribution patterns and this was partly based on common affinities for particular habitat conditions. The influence of factors related to sediment granulometry generally decreased with increasing size and mobility of the faunal group investigated. In terms of diversity and species composition, nematode communities encountered were similar to those occurring in comparable environments worldwide. As evident from sediment, contaminant and faunal analyses, acute effects of human activities on nematode populations seem unlikely. (c) 2005 Elsevier B.V. All rights reserved.10acommunity structure10anematode assemblages10aNorth Sea10aspecies diversity1 aSchratzberger, M1 aWarr, K1 aRogers, SI  uhttps://nematoda.myspecies.info/content/patterns-nematode-populations-southwestem-north-sea-and-their-link-other-components-benthic-02499nas 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-seas03129nas a2200277   4500008004100000245010300041210006900144260008500213300001200298490000700310520214500317653001802462653001902480653001602499653001402515653002202529653002502551100001902576700002102595700002502616700002502641700002102666700001302687700001802700856013302718       2009                        eng d00aBiodiversity patterns of free-living marine nematodes in a tropical bay: Cienfuegos, Caribbean Sea0 aBiodiversity patterns of freeliving marine nematodes in a tropic  a24-28 OVAL RD, LONDON NW1 7DX, ENGLANDbACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD  a179-1890 v853 aSpatial and temporal biodiversity patterns of free-living marine nematodes were studied in Cienfuegos Bay, a tropical semi-enclosed basin in the Caribbean Sea. Taxonomic (to species level) and functional (biological trait) approaches were applied for describing the assemblage structure and relating it to abiotic environment based on a sampling scheme in six subtidal stations and three months. Biological trait approach added relevant information to species pattern regarding relationships between diversity patterns and the abiotic environment. The most common morphotypes were deposit feeding nematodes, with colonising abilities of 2-3 (in a scale from 1 to 5), tail conical cylindrical or filiforme and body slender; and their abundance were correlated with depth, organic matter and silt/clay fraction. In spite of a high turnover of species, functional diversity of assemblages did not change notably in space and time. A result probably due to sampling of the habitat pool of species and to low heterogeneity of the studied muddy bottoms. Chemical pollution (organic enrichment and heavy metals) and hydrodynamic regime possibly drove the biodiversity patterns. Spatial distribution of assemblages support the existence of two well differentiated basins inside the bay, the northern basin more polluted than the southern one. The low hydrodynamic regime would determine a poor dispersion of nematodes resulting in high spatial variance in the assemblage structure; and also the associated hypoxic conditions and pollutants in sediments can explain the dominance of tolerant nematode species such as Daptonema oxycerca, Sabatieria pulchra, Terschellingia gourbaultae, and Terschellingia longicaudata. A comparison of spatial-temporal patterns of biodiversity between Cienfuegos Bay and other semi-enclosed bays in temperate regions suggests several similarities: nematode assemblages are strongly influenced by anthropogenic disturbance, temporal trends are weak or overridden by spatial ones, and few cosmopolitan genera/species tolerant to pollution and hypoxic conditions are dominant. (C) 2009 Elsevier Ltd. All rights reserved.10aCaribbean Sea10amarine ecology10aMeiobenthos10anematodes10aspecies diversity10atropical environment1 aArmenteros, M.1 aRuiz-Abierno, A.1 aFernandez-Garces, R.1 aPerez-Garcia, J., A.1 aDiaz-Asencio, L.1 aVincx, M1 aDecraemer, W.  uhttps://nematoda.myspecies.info/content/biodiversity-patterns-free-living-marine-nematodes-tropical-bay-cienfuegos-caribbean-sea