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• W2032461238 endingPage "126" @default.
• W2032461238 startingPage "106" @default.
• W2032461238 abstract "Hydrogen isotope values (δD) of sedimentary aquatic and terrestrial lipid biomarkers, originating from algae, bacteria, and leaf wax, have been used to record isotopic properties of ancient source water (i.e., precipitation and/or lake water) in several mid- and high-latitude lacustrine environments. In the tropics, however, where both processes associated with isotope fractionation in the hydrologic system and vegetation strongly differ from those at higher latitudes, calibration studies for this proxy are not yet available. To close this gap of knowledge, we sampled surface sediments from 11 lakes in Cameroon to identify those hydro-climatological processes and physiological factors that determine the hydrogen isotopic composition of aquatic and terrestrial lipid biomarkers. Here we present a robust framework for the application of compound-specific hydrogen isotopes in tropical Africa. Our results show that the δD values of the aquatic lipid biomarker n-C17 alkane were not correlated with the δD values of lake water. Carbon isotope measurements indicate that the n-C17 alkane was derived from multiple source organisms that used different hydrogen pools for biosynthesis. We demonstrate that the δD values of the n-C29 alkane were correlated with the δD values of surface water (i.e., river water and groundwater), which, on large spatial scales, reflect the isotopic composition of mean annual precipitation. Such a relationship has been observed at higher latitudes, supporting the robustness of the leaf-wax lipid δD proxy on a hemispheric spatial scale. In contrast, the δD values of the n-C31 alkane did not show such a relationship but instead were correlated with the evaporative lake water δD values. This result suggests distinct water sources for both leaf-wax lipids, most likely originating from two different groups of plants. These new findings have important implications for the interpretation of long-chain n-alkane δD records from ancient lake sediments. In particular, a robust interpretation of palaeohydrological data requires knowledge of the vegetation in the catchment area as different plants may utilise different water sources. Our results also suggest that the combination of carbon and hydrogen isotopes does help to differentiate between the metabolic pathway and/or growth form of organisms and therefore, the source of hydrogen used during lipid biosynthesis." @default.
• W2032461238 created "2016-06-24" @default.
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• W2032461238 date "2012-02-01" @default.
• W2032461238 modified "2023-10-18" @default.
• W2032461238 title "Hydrogen isotope ratios of lacustrine sedimentary n-alkanes as proxies of tropical African hydrology: Insights from a calibration transect across Cameroon" @default.
• W2032461238 cites W1548800328 @default.
• W2032461238 cites W1610719105 @default.
• W2032461238 cites W1869624336 @default.
• W2032461238 cites W1966384168 @default.
• W2032461238 cites W1969568109 @default.
• W2032461238 cites W1976236382 @default.
• W2032461238 cites W1981430944 @default.
• W2032461238 cites W1982932887 @default.
• W2032461238 cites W1983913975 @default.
• W2032461238 cites W1985130797 @default.
• W2032461238 cites W1985949400 @default.
• W2032461238 cites W1986789727 @default.
• W2032461238 cites W1988378253 @default.
• W2032461238 cites W1989406662 @default.
• W2032461238 cites W1989728222 @default.
• W2032461238 cites W1992191444 @default.
• W2032461238 cites W1995336154 @default.
• W2032461238 cites W1998572667 @default.
• W2032461238 cites W2003235507 @default.
• W2032461238 cites W2003370557 @default.
• W2032461238 cites W2006828330 @default.
• W2032461238 cites W2008591318 @default.
• W2032461238 cites W2008758302 @default.
• W2032461238 cites W2010213262 @default.
• W2032461238 cites W2010646870 @default.
• W2032461238 cites W2013325969 @default.
• W2032461238 cites W2015472693 @default.
• W2032461238 cites W2017600855 @default.
• W2032461238 cites W2018483813 @default.
• W2032461238 cites W2019044590 @default.
• W2032461238 cites W2030711236 @default.
• W2032461238 cites W2032145062 @default.
• W2032461238 cites W2033687722 @default.
• W2032461238 cites W2034804026 @default.
• W2032461238 cites W2036199194 @default.
• W2032461238 cites W2040782617 @default.
• W2032461238 cites W2041599823 @default.
• W2032461238 cites W2043876647 @default.
• W2032461238 cites W2048524382 @default.
• W2032461238 cites W2050170647 @default.
• W2032461238 cites W2052394625 @default.
• W2032461238 cites W2057545303 @default.
• W2032461238 cites W2058515250 @default.
• W2032461238 cites W2060823650 @default.
• W2032461238 cites W2064609931 @default.
• W2032461238 cites W2064781023 @default.
• W2032461238 cites W2066271207 @default.
• W2032461238 cites W2066980677 @default.
• W2032461238 cites W2067421048 @default.
• W2032461238 cites W2068656127 @default.
• W2032461238 cites W2072191315 @default.
• W2032461238 cites W2073292087 @default.
• W2032461238 cites W2079446047 @default.
• W2032461238 cites W2083879582 @default.
• W2032461238 cites W2087824376 @default.
• W2032461238 cites W2090706195 @default.
• W2032461238 cites W2092358033 @default.
• W2032461238 cites W2096532104 @default.
• W2032461238 cites W2097705442 @default.
• W2032461238 cites W2100866593 @default.
• W2032461238 cites W2103793094 @default.
• W2032461238 cites W2104605413 @default.
• W2032461238 cites W2105165322 @default.
• W2032461238 cites W2106867767 @default.
• W2032461238 cites W2108603985 @default.
• W2032461238 cites W2112776483 @default.
• W2032461238 cites W2118702496 @default.
• W2032461238 cites W2122573937 @default.
• W2032461238 cites W2123241285 @default.
• W2032461238 cites W2124351276 @default.
• W2032461238 cites W2128415685 @default.
• W2032461238 cites W2136803670 @default.
• W2032461238 cites W2139717898 @default.
• W2032461238 cites W2144659916 @default.
• W2032461238 cites W2146029142 @default.
• W2032461238 cites W2156135283 @default.
• W2032461238 cites W2157517587 @default.
• W2032461238 cites W2158271747 @default.
• W2032461238 cites W2161948231 @default.
• W2032461238 cites W2166733474 @default.
• W2032461238 cites W2528136330 @default.
• W2032461238 cites W4236768654 @default.
• W2032461238 doi "https://doi.org/10.1016/j.gca.2011.11.039" @default.
• W2032461238 hasPublicationYear "2012" @default.

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