03323nas a2200169   4500008004100000245013300041210006900174260008100243300001400324490000700338520258900345100002202934700001802956700002002974700002202994856013703016       2007                        eng d00aDiversity of melofauna and free-living nematodes in hydrothermal vent mussel beds on the northern and southern East Pacific Rise0 aDiversity of melofauna and freeliving nematodes in hydrothermal   a32 AVENUE OF THE AMERICAS, NEW YORK, NY 10013-2473 USAbCAMBRIDGE UNIV PRESS  a1141-11520 v873 aThe ecology and biogeography of meiofauna at deep-sea hydrothermal vents have historically received less attention than those of mega- and macrofauna. This study examines the composition of major meiofaunal taxa in beds of the mussel Bathymodiolus thermophilus at hydrothermal vents on the northern and southern East Pacific Rise (EPR) and presents the first comparison of species assemblages of the dominant taxon, the nematodes, among sites spanning 27 degrees of latitude. Meiofaunal samples were collected by submersible from three mussel beds at 9 degrees N on the EPR and four mussel beds between 17 and 18 degrees S in 1999. Estimated ages of the mussel beds at the time of sampling range from 4 to >20 years, enabling investigation of the influence of mussel bed age on meiofaunal assemblages. Overall, the meiofauna of the mussel beds was dominated by nematodes, with copepods constituting the second most abundant meiofaunal group. There was variation in the ratio of nematodes to copepods between sites, however, with copepods more abundant than nematodes in the youngest mussel beds. Apart from polychaete larvae, other meiofaunal groups were generally present at very low abundance (<1%) in the samples and restricted in diversity to gastropod larvae, acari, foraminifera, ostracoda and turbellaria. Seventeen nematode species from 14 genera and I I families were found in the samples, with no evidence of endemicity to hydrothermal vents at the generic level. Four genera present were not previously recorded at hydrothermal vents. Nematode species richness, species:genus ratios and abundances were low compared with other deep-sea habitats, though the ecological relevance of comparisons with soft-sediment benthos is discussed. Nematode assemblages exhibited high dominance by a few species, with one species of Thalassomonhystera most abundant at five of the seven vent sites. Multivariate analysis of nematode assemblages reveals similarities among sites that do not match geographical proximity. The youngest mussel beds were most similar to each other and exhibited lower species richness than other sites, consistent with colonization of mussel bed habitat by nematodes over time. Similarity in the composition of nematode assemblages among sites separated by similar to 3000 km indicates that they lie within a single biogeographic province, consistent with that proposed for mussel bed macrofauna. At a generic level, samples exhibited some overlap with nematode assemblages at vents elsewhere on the EPR, on the Mid Atlantic Ridge and in the North Fiji Basin.1 aCopley, J., T. P.1 aFlint, H., C.1 aFerrero, T., J.1 aVan Dover, C., L.  uhttps://nematoda.myspecies.info/content/diversity-melofauna-and-free-living-nematodes-hydrothermal-vent-mussel-beds-northern-and-sou02419nas a2200253   4500008004100000245016200041210006900203260008400272300001200356490000700368520147600375653001301851653001401864653001401878653001901892653001301911100001501924700002001939700001701959700001701976700001901993700001602012856013702028       2008                        eng d00aAn assessment of the spatial heterogeneity of environmental disturbance within an enclosed harbour through the analysis of meiofauna and nematode assemblages0 aassessment of the spatial heterogeneity of environmental disturb  a24-28 OVAL RD, LONDON NW1 7DX, ENGLANDbACADEMIC PRESS LTD ELSEVIER SCIENCE LTD  a565-5760 v773 aSignificant spatial heterogeneity in the abundance and composition of meiofaunal and nematode assemblages was described inside the Genoa-Voltri harbour (Genoa, Italy) in relation to variation in the main environmental variables. In harbour sediments characterized by low Eh values and high organic matter concentrations, total meiofauna abundance was lower (948 +/- 919 ind 10 cm(-2)), nematode individual biomass was higher (0.17 +/- 0.07 mu g C), kinorhynchs and tanaids were completely absent, and the nematode assemblage was dominated by the genera Terschellingia, Sabatieria (pulchra group) and Paracomesoma. In contrast, in sediment characterized by lower levels of organic pollution, meiofaunal abundance was higher (1085 737 ind 10 cm(-2)), nematode individual biomass was lower (0.11 +/- 0.04 mu g C), kinorhynchs and tanaids were present and the nematodes were dominated by the genera Desmodora, Daptonema, Anticoma and Halalaimus. Environmental disturbance as assessed by the analysis of meiofaunal and nematode assemblages and sediment environmental variables changed significantly over a scale hundreds of meters, but did not follow a gradient from the inner to the outer harbour. Analysis of nematode assemblages is proposed as a useful tool for the identification of environmental risk areas which may assist in the development of good planning, monitoring programmes and better management of harbour ecosystems. (c) 2007 Elsevier Ltd. All rights reserved.10aharbours10ameiofauna10anematodes10aorganic matter10asediment1 aMoreno, M.1 aFerrero, T., J.1 aGallizia, I.1 aVezzulli, L.1 aAlbertelli, G.1 aFabiano, M.  uhttps://nematoda.myspecies.info/content/assessment-spatial-heterogeneity-environmental-disturbance-within-enclosed-harbour-through-a00630nas a2200145   4500008004100000245013400041210006900175300001400244490000700258100002200265700001800287700002000305700002200325856013700347       2007                        eng d00aDiversity of meiofauna and free-living nematodes in hydrothermals vent mussel beds on the northern and southern East Pacific Rise0 aDiversity of meiofauna and freeliving nematodes in hydrothermals  a1141-11520 v871 aCopley, J., T. P.1 aFlint, H., C.1 aFerrero, T., J.1 aVan Dover, C., L.  uhttps://nematoda.myspecies.info/content/diversity-meiofauna-and-free-living-nematodes-hydrothermals-vent-mussel-beds-northern-and-so00686nas a2200169   4500008004100000245013800041210006900179300001100248490000600259100002500265700001600290700002000306700001800326700001600344700001900360856013700379       2003                        eng d00aBiodiversity of nematode assemblages from the region of the {Clarion-Clipperton Fracture Zone}, an area of commercial mining interest0 aBiodiversity of nematode assemblages from the region of the Clar  a1–120 v31 aLambshead, P., J. D.1 aBrown, C.J.1 aFerrero, T., J.1 aHawkins, L.E.1 aSmith, C.R.1 aMitchell, N.J.  uhttps://nematoda.myspecies.info/content/biodiversity-nematode-assemblages-region-clarion-clipperton-fracture-zone-area-commercial-mi