{"refrec":{"BRefID":66836,"RR":"<b>Carrasco, F.D.; Gallardo, V.A.; Baltazar, M.</b> (1999). The structure of the benthic macrofauna collected across a transect at the central chile shelf and relationships with giant sulfur bacteria <i>Thioploca</i> spp. mats. <i>Cah. Biol. Mar. 40(2)</i>: 195-202","BEntID":63207,"PublicFlag":1,"CheckedFlag":0,"wosflag":1,"vabbflag":null,"RefStringPartII":" <i>Cah. Biol. Mar. 40(2)</i>: 195-202","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Carrasco, F.D.; Gallardo, V.A.; Baltazar, M.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Carrasco, F.D. <i>et al.</i>","Englishabstract":"The analysis of the community structure of macrobenthic (>0.25 mm) assemblages collected from a transect in the Central Chile shelf and the relationships with sulphur bacteria <i>Thioploca</i> spp. was performed. Samples were obtained in April 1982 (southern Autumn) with a 0.1 m<sup>2</sup> Smith-McIntyre grab at three cross-shelf stations off Concepcion Bay, central Chile. Sediments consisted of fine muds (>95% silt-clay) with high (>15%) total organic matter. Here bottom waters showed the typical characteristics of the pole-ward flowing Sub-Surface Equatorial Waters, i.e., higher salinity than those at surface (>34.5%,) and low oxygen (<1.0 ml O<sub>-2</sub> l<sup>-1</sup>r). Filaments of the giant bacteria <i>Thioploca</i> spp. were moderately collected at station E I (31.9 g m<sup>-2</sup> wet weight at 75 m depth), were scarce at station E2 (2.3 g m<sup>-2</sup> w. wt. at 100 m), and absent at station E3 (121 m). In all sites macrofaunal composition was comparable, with a low total species richness, a low species diversity (27 species), and a high dominance. Average figures for abundance ranged from 77,880 ind m<sup>-2</sup> at El to 14,770 ind m<sup>-2</sup> at E3. Faunal biomass (w. wt.) ranged from I 10 g m<sup>-2</sup>) at El to 32 g m<sup>-2</sup> at E3. Polychaeta was the most abundant taxon (78% of the total), with <i>Paraprionospio pinnata</i> as the dominant species in all stations. Statistical analyses indicated significant differences among all sites, but in particular between El, with a larger population of <i>Thioploca</i> spp., and the deeper E2 and E3 sites where <i>Thioploca</i> was scarse and absent, respectively.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"The structure of the benthic macrofauna collected across a transect at the central chile shelf and relationships with giant sulfur bacteria <i>Thioploca</i> spp. mats.","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2024-12-10 01:33:17.368041","timezone_type":1,"timezone":"+01:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":null,"OtherDescriptors":null,"Notes":null,"AnaPub":1999,"MonPub":null,"DateUpdate":"2016-03-14","DateCreate":"2004-10-07","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000081720400008","VABBcode":null,"OpenAcc":1},"refs":null,"anarec":{"AnaID":66836,"PubliDate":1999,"Pagination":"195-202","XtraPublOfAnaID":null,"ISBN":null,"Volume":"40","Issue":"2","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":42348,"SerRR":"Cahiers de Biologie Marine. 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