{"refrec":{"BRefID":282329,"RR":"<b>Abdul Jaleel, K.U.; Anil Kumar, P.R.; Nousher Khan, K.; Correya, N.S.; Jacob, J.; Philip, R.; Sanjeevan, V.N.; Damodaran, R.</b> (2014). Polychaete community structure in the South Eastern Arabian Sea continental margin (200–1000 m). <i>Deep-Sea Res., Part 1, Oceanogr. Res. Pap. 93</i>: 60-71. <a href=\"http://dx.doi.org/10.1016/j.dsr.2014.07.006\" target=\"_blank\">http://dx.doi.org/10.1016/j.dsr.2014.07.006</a>","BEntID":274348,"PublicFlag":1,"CheckedFlag":0,"wosflag":1,"vabbflag":1,"RefStringPartII":". <i>Deep-Sea Res., Part 1, Oceanogr. Res. Pap. 93</i>: 60-71. <a href=\"http://dx.doi.org/10.1016/j.dsr.2014.07.006\" target=\"_blank\">http://dx.doi.org/10.1016/j.dsr.2014.07.006</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Abdul Jaleel, K.U.; Anil Kumar, P.R.; Nousher Khan, K.; Correya, N.S.; Jacob, J.; Philip, R.; Sanjeevan, V.N.; Damodaran, R.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Abdul Jaleel, K.U. <i>et al.</i>","Englishabstract":"Macrofaunal polychaete communities (&gt;500 µm) in the South Eastern Arabian Sea (SEAS) continental margin (200–1000 m) are described, based on three systematic surveys carried out in 9 transects (at ~200 m, 500 m and 1000 m) between 7°00′and 14°30′N latitudes. A total of 7938 polychaetes belonging to 195 species were obtained in 136 grab samples collected at 27 sites. Three distinct assemblages were identified in the northern part of the SEAS margin (10–14°30′N), occupying the three sampled depth strata (shelf edge, upper and mid-slope) and two assemblages (shelf edge and slope) in the south (7–10°N). Highest density of polychaetes and dominance of a few species were observed in the shelf edge, where the Arabian Sea oxygen minimum zone (OMZ) impinged on the seafloor, particularly in the northern transects. The resident fauna in this region (<i>Cossura coasta</i>, <i>Paraonis gracilis</i>, <i>Prionospio</i> spp. and <i>Tharyx</i> spp.) were characteristically of smaller size, and well suited to thrive in the sandy sediments in OMZ settings. Densities were lowest along the most northerly transect (T9), where dissolved oxygen (DO) concentrations were extremely low (<0.15 ml l<sup>−1</sup>, i.e.&lt;6.7 μmol l<sup>−1</sup>). Beyond the realm of influence of the OMZ (i.e. mid-slope, ~1000 m), the faunal density decreased while species diversity increased. The relative proportion of silt increased with depth, and the dominance of the aforementioned species decreased, giving way to forms such as <i>Paraprionospio pinnata</i>, <i>Notomastus</i> sp., <i>Eunoe</i> sp. and lumbrinerids. Relatively high species richness and diversity were observed in the sandy sediments of the southern sector (7–9°N), where influence of the OMZ was less intense. The area was also characterized by certain species (e.g. <i>Aionidella cirrobranchiata</i>, <i>Isolda pulchella</i>) that were nearly absent in the northern region. The gradients in DO concentration across the core and lower boundary of the OMZ, along with bathymetric and latitudinal variation in sediment texture, were responsible for differences in polychaete size and community structure on the SEAS margin. Spatial and temporal variations were observed in organic matter (OM) content of the sediment, but these were not reflected in the density, diversity or distribution pattern of the polychaetes.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Polychaete community structure in the South Eastern Arabian Sea continental margin (200–1000 m)","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2026-04-17 01:32:11.773047","timezone_type":1,"timezone":"+02:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":"    Benthos; Arabian Sea; Continental margin; Oxygen minimum zone; Macrofauna; Polychaeta; Community structure","OtherDescriptors":null,"Notes":null,"AnaPub":2014,"MonPub":null,"DateUpdate":"2017-01-06","DateCreate":"2017-01-06","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000343853200006","VABBcode":null,"OpenAcc":0,"DOI":"10.1016/j.dsr.2014.07.006"},"refs":null,"anarec":{"AnaID":282329,"PubliDate":2014,"Pagination":"60-71","XtraPublOfAnaID":null,"ISBN":null,"Volume":"93","Issue":null,"BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":45506,"SerRR":"Deep-Sea Research, Part I. 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