{"refrec":{"BRefID":10346,"RR":"<b>Bouillon, S.; Raman, A.V.; Dauby, P.; Dehairs, F.A.</b> (2002). Carbon and nitrogen stable isotope ratios of subtidal benthic invertebrates in an estuarine mangrove ecosystem (Andhra Pradesh, India). <i>Est., Coast. and Shelf Sci. 54(5)</i>: 901-913. <a href=\"http://dx.doi.org/10.1006/ecss.2001.0864\" target=\"_blank\">dx.doi.org/10.1006/ecss.2001.0864</a>","BEntID":10346,"PublicFlag":1,"CheckedFlag":0,"wosflag":1,"vabbflag":1,"RefStringPartII":". <i>Est., Coast. and Shelf Sci. 54(5)</i>: 901-913. <a href=\"https://dx.doi.org/10.1006/ecss.2001.0864\" target=\"_blank\">https://dx.doi.org/10.1006/ecss.2001.0864</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Bouillon, S.; Raman, A.V.; Dauby, P.; Dehairs, F.A.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Bouillon, S. <i>et al.</i>","Englishabstract":"In order to assess the relative trophic importance of mangrove litterfall and aquatic primary production in the mangrove creeks of the Coringa Wildlife Sanctuary (Andhra Pradesh, India) and the adjacent semi-enclosed Kakinada Bay, carbon and nitrogen stable isotope ratios were determined in a variety of benthic invertebrate species collected at 22 sites during the pre-monsoon period (May–June) of 1997 and 1999. d<sup>13</sup>C values showed little interspecific variation at any given location, but there was a distinct spatial gradient in consumer d<sup>13</sup>C values of about 7‰, with more depleted values in the mangrove creeks (-23•6±0•6‰), and gradually increasing in the mangrove outlets (-21•5±0•9‰), a relatively restricted zone in the south-eastern part of Kakinada Bay adjacent to the mangroves (-18•8±0•8‰), and the central and northern part of the Bay (-16•7±1•4‰) which opens into the Bay of Bengal. This gradient is much larger than that observed during a previous study in suspended organic matter (maximum about 2•7‰) and during this study in sediment organic matter (about 1•5–2•5‰). The observed carbon stable isotope ratios thus suggest a marked selectivity of the benthic invertebrate community for pelagic and benthic microalgal food sources and indicate that mangrove-derived and other terrestrial carbon is not a significant food source for benthic invertebrate communities in this ecosystem during the pre-monsoon period. Furthermore, d<sup>13</sup>C values of sediment organic matter (SOM) suggest that terrestrial carbon is not a major contributor to the SOM-pool in this ecosystem. Evidence for seaward migration of Penaeid prawns was provided by some individuals caught in the North Bay which displayed low d<sup>13</sup>C values of characteristic of fauna found in the mangrove creeks or outlets. Nitrogen stable isotope ratios were found to be a useful indicator of trophic level, even though there remained some overlap between d<sup>15</sup>N values of presumed low and higher trophic levels. Benthic invertebrates showed a d<sup>15</sup>N gradient of about 3•2‰ between the mangrove creeks and the Central and North Bay whereas sediment d<sup>15</sup>N values showed a smaller spatial gradient of about 1•6‰. This gradient which is hypothesized to reflect differences in inorganic nitrogen sources and availability.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Carbon and nitrogen stable isotope ratios of subtidal benthic invertebrates in an estuarine mangrove ecosystem (Andhra Pradesh, India)","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":"mangroves; estuary; benthic invertebrates; carbon; nitrogen; stable isotopes; outwelling; sediment","OtherDescriptors":null,"Notes":null,"AnaPub":2002,"MonPub":null,"DateUpdate":"2014-03-18","DateCreate":"2001-05-30","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000177232700009","VABBcode":null,"OpenAcc":0,"DOI":"10.1006/ecss.2001.0864"},"refs":null,"anarec":{"AnaID":10346,"PubliDate":2002,"Pagination":"901-913","XtraPublOfAnaID":null,"ISBN":null,"Volume":"54","Issue":"5","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":44109,"SerRR":"Estuarine, Coastal and Shelf Science. 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