TY  - JOUR
A1  - Menzel, Philip
A1  - Anupama, Krishnamurthy
A1  - Basavaiah, Nathani
A1  - Das, Brijraj Krishna
A1  - Gaye, Birgit
A1  - Herrmann, Nicole
A1  - Prasad, Sushma
T1  - The use of amino acid analyses in (palaeo-) limnological investigations: A comparative study of four Indian lakes in different climate regimes
JF  - Geochimica et cosmochimica acta : journal of the Geochemical Society and the Meteoritical Society
N2  - In the present study, we report the results of comprehensive amino acid (AA) analyses of four Indian lakes from different climate regimes. We focus on the investigation of sediment cores retrieved from the lakes but data of modern sediment as well as vascular plant, soil, and suspended particulate matter samples from individual lakes are also presented. Commonly used degradation and organic matter source indices are tested for their applicability to the lake sediments, and we discuss potential reasons for possible limitations. A principal component analysis including the monomeric AA composition of organic matter of all analysed samples indicates that differences in organic matter sources and the environmental properties of the individual lakes are responsible for the major variability in monomeric AA distribution of the different samples. However, the PCA also gives a factor that most probably separates the samples according to their state of organic matter degradation. Using the factor loadings of the individual AA monomers, we calculate a lake sediment degradation index (LI) that might be applicable to other palaeo-lake investigations. (C) 2015 Elsevier Ltd. All rights reserved.
Y1  - 2015
U6  - https://doi.org/10.1016/j.gca.2015.03.028
SN  - 0016-7037
SN  - 1872-9533
VL  - 160
SP  - 25
EP  - 37
PB  - Elsevier
CY  - Oxford
ER  -