dc.contributor.author | Fernandes, S.O. | |
dc.contributor.author | Michotey, V.D. | |
dc.contributor.author | Guasco, S. | |
dc.contributor.author | Bonin, P.C. | |
dc.contributor.author | LokaBharathi, P.A. | |
dc.date.accessioned | 2012-02-03T03:59:24Z | |
dc.date.available | 2012-02-03T03:59:24Z | |
dc.date.issued | 2012 | |
dc.identifier.citation | Marine Environmental Research, vol.74; 2012; 9-19 | |
dc.identifier.other | no | |
dc.identifier.uri | http://drs.nio.org/drs/handle/2264/4008 | |
dc.description.abstract | Denitrification, 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.iso | en | |
dc.publisher | Elsevier | |
dc.relation.requires | Mar_Environ_Res_74_9.JPG | |
dc.rights | An edited version of this paper was published by Elsevier. Copyright [2011] Elsevier | |
dc.subject | mangrove swamps | |
dc.subject | nitrogen cycle | |
dc.subject | oxidation | |
dc.subject | denitrification | |
dc.title | Denitrification prevails over anammox in tropical mangrove sediments (Goa, India) | |
dc.type | Journal Article | |