Nathani Basavaiah, M. G. Wiesner, Ambili Anoop, P. Menzel, Norbert R. Nowaczyk, K. Deenadayalan, Achim Brauer, Birgit Gaye, R. Naumann, N. Riedel, M. Stebich, Sushma Prasad
- We report the results of our investigations on the catchment area, surface sediments, and hydrology of the monsoonal Lonar Lake, central India. Our results indicate that the lake is currently stratified with an anoxic bottom layer, and there is a spatial heterogeneity in the sensitivity of sediment parameters to different environmental processes. In the shallow (0-5 m) near shore oxic-suboxic environments the lithogenic and terrestrial organic content is high and spatially variable, and the organics show degradation in the oxic part. Due to aerial exposure resulting from lake level changes of at least 3m, the evaporitic carbonates are not completely preserved. In the deep water (>5 m) anoxic environment the lithogenics are uniformly distributed and the delta C-13 is an indicator not only for aquatic vs. terrestrial plants but also of lake pH and salinity. The isotopic composition of the evaporites is dependent not only on the isotopic composition of source water (monsoon rainfall and stream inflow) and evaporation, but is alsoWe report the results of our investigations on the catchment area, surface sediments, and hydrology of the monsoonal Lonar Lake, central India. Our results indicate that the lake is currently stratified with an anoxic bottom layer, and there is a spatial heterogeneity in the sensitivity of sediment parameters to different environmental processes. In the shallow (0-5 m) near shore oxic-suboxic environments the lithogenic and terrestrial organic content is high and spatially variable, and the organics show degradation in the oxic part. Due to aerial exposure resulting from lake level changes of at least 3m, the evaporitic carbonates are not completely preserved. In the deep water (>5 m) anoxic environment the lithogenics are uniformly distributed and the delta C-13 is an indicator not only for aquatic vs. terrestrial plants but also of lake pH and salinity. The isotopic composition of the evaporites is dependent not only on the isotopic composition of source water (monsoon rainfall and stream inflow) and evaporation, but is also influenced by proximity to the isotopically depleted stream inflow. We conclude that in the deep water environment lithogenic content, and isotopic composition of organic matter can be used for palaeoenvironmental reconstruction.…
MetadatenVerfasserangaben: | Nathani Basavaiah, M. G. Wiesner, Ambili Anoop, P. Menzel, Norbert R. Nowaczyk, K. Deenadayalan, Achim BrauerORCiDGND, Birgit Gaye, R. Naumann, N. Riedel, M. Stebich, Sushma PrasadORCiD |
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DOI: | https://doi.org/10.1127/1863-9135/2014/0515 |
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ISSN: | 1863-9135 |
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Titel des übergeordneten Werks (Englisch): | Fundamental and applied limnology : official journal of the International Association of Theoretical and Applied Limnology |
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Verlag: | Schweizerbart |
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Verlagsort: | Stuttgart |
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Publikationstyp: | Wissenschaftlicher Artikel |
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Sprache: | Englisch |
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Jahr der Erstveröffentlichung: | 2014 |
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Erscheinungsjahr: | 2014 |
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Datum der Freischaltung: | 27.03.2017 |
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Freies Schlagwort / Tag: | isotopes; lonar lake; magnetic parameters; modern surface sediments; monsoon; palaeoenvironmental proxies |
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Band: | 184 |
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Ausgabe: | 1 |
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Seitenanzahl: | 18 |
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Erste Seite: | 51 |
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Letzte Seite: | 68 |
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Fördernde Institution: | Deutsche Forschungsgemeinshaft (DFG, Germany) [FOR 1380]; Universitat
Potsdam; Deutsches GeoForschungsZentrum Potsdam; Indian Institute of
Geomagnetism, Mumbai |
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Organisationseinheiten: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Geowissenschaften |
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Peer Review: | Referiert |
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Name der Einrichtung zum Zeitpunkt der Publikation: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Erd- und Umweltwissenschaften |
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