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dc.contributor.authorFernandes, S.O.
dc.contributor.authorMichotey, V.D.
dc.contributor.authorGuasco, S.
dc.contributor.authorBonin, P.C.
dc.contributor.authorLokaBharathi, P.A.
dc.date.accessioned2012-02-03T03:59:24Z
dc.date.available2012-02-03T03:59:24Z
dc.date.issued2012
dc.identifier.citationMarine Environmental Research, vol.74; 2012; 9-19
dc.identifier.otherno
dc.identifier.urihttp://drs.nio.org/drs/handle/2264/4008
dc.description.abstractDenitrification, anammox (Anx) and di-nitrogen fixation were examined in two mangrove ecosystems- the anthropogenically influenced Divar and the relatively pristine Tuvem. Stratified sampling at 2 cm increments from 0 to 10 cm depth revealed denitrification as the main process of N sub(2) production in mangrove sediments. At Divar, denitrification was approx 3 times higher than at Tuvem with maximum activity of 224.51 + or -6.63 nmol N sub(2) g sup(−1) h sup(−1) at 0–2 cm. Denitrifying genes (nosZ) numbered up to 2×10 sup(7) copies g sup(−1) sediment and belonged to uncultured microorganisms clustering within Proteobacteria. Anammox was more prominent at deeper depths (8–10 cm) mainly in Divar with highest activity of 101.15 + or -87.73 nmol N sub(2) g sup(−1) h sup(−1) which was 5 times higher than at Tuvem. Di-nitrogen fixation was detected only at Tuvem with a maximum of 12.47 + or -8.36 nmol N sub(2) g sup(−1) h sup(−1). Thus, in these estuarine habitats prone to high nutrient input, N sub(2)-fixation is minimal and denitrification rather than Anx serves as an important mechanism for counteracting N loading.
dc.language.isoen
dc.publisherElsevier
dc.relation.requiresMar_Environ_Res_74_9.JPG
dc.rightsAn edited version of this paper was published by Elsevier. Copyright [2011] Elsevier
dc.subjectmangrove swamps
dc.subjectnitrogen cycle
dc.subjectoxidation
dc.subjectdenitrification
dc.titleDenitrification prevails over anammox in tropical mangrove sediments (Goa, India)
dc.typeJournal Article


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