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[期刊论文][Research Articles]
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Environmental impact on coastal wetlands since 4 ka in Cauvery Delta: Palynology and thecamoebian study
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作 者:
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Jyoti Srivastava;Anjum Farooqui;
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出版年:2014
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页 码:459 - 466
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出版社:Springer Nature
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摘 要:
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Palaeoclimate and Palaeoecological study was carried out in ∼2 m sediment core deposited since 4 ka in an estuarine environment along Uppanar River mouth, Cauvery Delta. Palynological and thecamoebian evidences indicate (1) a basal fluvial lacustrine depositional environment (∼4–3 ka) characterized by sandy sediment, with low salinity and dominance of non-pollen forms like foraminiferal linings and thecamoebians with a low percentage of pollen and spores and (2) an estuarine environment (since 3 ka) characterized by clayey sediment with high salinity and a good percentage of mangrove and terrestrial pollen along with non-pollen forms. A shift in the depositional environment since ∼3 ka indicates monsoonal and geomorphological changes in the coastal wetland. During this period dominance of Avicennia and Cheno/Ams indicate low freshwater runoff from land suggesting a weakened monsoon condition enhanced by anthropogenic activity.
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关键字:
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Palynology; Thecamoebians; Uppanar River; Cauvery delta; Climate; Industry SectorsEnergy, Utilities & Environment ; Oil, Gas & Geosciences ;
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所属期刊
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ISSN: 0016-7622
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来自:Springer Nature
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