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dc.contributor.authorKrishna, M.S.
dc.contributor.authorNaidu, S.A.
dc.contributor.authorPrasad, M.H.K.
dc.contributor.authorSubbaiah, C.V.
dc.contributor.authorReddy, N.P.C.
dc.contributor.authorRao, N.S.
dc.date.accessioned2025-07-04
dc.date.accessioned2025-07-04T06:45:22Z
dc.date.available2025-05-19
dc.date.available2025-07-04T06:45:22Z
dc.date.issued2025
dc.identifier.citationScientific Reports,vol.15(1);2025;pp 17267
dc.identifier.issn2045-2322
dc.identifier.other10.1038/s41598-025-99286-0
dc.identifier.urihttps://doi.org/10.1038/s41598-025-99286-0
dc.identifier.urihttp://drs.nio.res.in/drs/handle/2264/9462
dc.descriptionIF2023= 3.8
dc.description.abstractIn this study, we examined the major sources of particulate organic matter (POM) in the Godavari River during high flow and low flow periods, to understand the impact of excess nitrogen (N)-fertilizers used in agricultural fields. ?13C of particulate organic carbon (POC) and ?15N of particulate nitrogen (PN), elemental carbon (C) to N ratio and POC:Chl-a ratios indicated that in-situ sources predominantly contributed (~?60%) during low flow period, whereas, terrestrial sources largely contributed during high flow period (75�80%). This is attributed to prevailing conducive conditions such as low flow, better light availability due to low suspended matter and availability of nutrients for phytoplankton growth during former period, whereas increased transport of particulate and dissolved materials from land to river during the latter period. ?15NPN during low flow (7.4?�?2.9�) and high flow (9.4?�?2.1�) periods demonstrate that contribution of POM produced from N-fertilizers (?15NPN: 0?�?1�) is not significant, rather than hitherto hypothesized. It could be due to seepage of excess N-fertilizers used in agricultural fields into groundwaters rather than transporting to rivers and/or transformation to another from through nitrification/denitrification processes within soils.
dc.languageen
dc.publisherSpringer
dc.relation.isreferencedbySCI
dc.rightsOnly the author version of the copright reserved papers uploaded. Contact drs@nio.org for any complaints regarding copyright violations
dc.titleRole of synthetic fertilizers on stable isotope ratios of particulate organic matter in the Godavari River
dc.typeJournal Article
dc.affiliation.authorCSIR-National Institute of Oceanography, Regional Centre, Visakhapatnam, India


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