dc.contributor.author | Pande, A. | |
dc.contributor.author | Nayak, G.N. | |
dc.contributor.author | Prasad, V. | |
dc.contributor.author | PrakashBabu, C | |
dc.date.accessioned | 2016-11-03T10:59:28Z | |
dc.date.accessioned | 2017-09-30T03:12:36Z | |
dc.date.available | 2016-11-03T10:59:28Z | |
dc.date.available | 2017-09-30T03:12:36Z | |
dc.date.issued | 2015 | |
dc.identifier.citation | Environmental Earth Sciences, vol.73(9); 2015; 5447-5461 | |
dc.identifier.issn | 1866-6280 | |
dc.identifier.uri | http://drs.nio.org/drs/handle/2264/7661 | |
dc.description.abstract | Two mudflat sediment cores collected from a sub-channel (S-61) and the main channel (S-60) of a tropical wetland, along central west coast of India, were investigated for recent changes in depositional environment using geochemical (sediment grain size, total organic carbon, total nitrogen, carbon/nitrogen ratio (TOC/TN), selected metals and pH) and diatom records The sub-channel (S-61) represents river environment which opens into main channel (S-60) which represents marine environment being close to the sea We report a transition from river-dominated to marine-dominated depositional environment over the years The relatively higher sand percentage together with elevated carbon/nitrogen ratio and predominance of freshwater diatoms suggested greater river runoff in the past while marine influence is supported by decrease in TOC/TN ratio and increased dominance of marine diatoms in recent years In the main channel (S-60), distribution of metals is regulated by organic matter (total nitrogen and total organic carbon) while in the sub-channel (S-61), Fe-Mn oxyhydroxides play a significant role in trace metal distribution The highest numbers of diatoms were recorded in the sub-channel (S-61) which is also characterized by higher total nitrogen concentration Geochemical and diatom signatures thus have helped to infer spatial and temporal variations in depositional environment. | |
dc.language | en | |
dc.publisher | Springer | |
dc.relation.ispartof | Environ Earth Sci | |
dc.relation.isreferencedby | SCI | |
dc.subject | Geology and Geophysics | |
dc.subject | Aquatic Non-Resources | |
dc.subject.other | Geochemistry | |
dc.subject.other | Wetlands | |
dc.subject.other | ISW, India | |
dc.title | Geochemical and diatom records of recent changes in depositional environment of a tropical wetland, central west coast of India | |
dc.type | Journal Article | |
dc.affiliation.author | Goa University, Taleigao Plateau, Goa, India | |