Fig. 2: Analysis of lake surface sediments from Tibetan Plateau. | Communications Earth & Environment

Fig. 2: Analysis of lake surface sediments from Tibetan Plateau.

From: Discrepancies in lacustrine bacterial lipid temperature reconstructions explained by microbial ecology

Fig. 2

a Map of 38 lake surface samples (yellow dots) and Holocene sample sites (blue stars) examined in this study (see Supplementary data for more details on the lakes); b Application of the Gaussian Mixture Model (GMM) clustering algorithm on isomer ratio (IR) and the degree of methylation (MBT′5Me) data from Tibetan surface sediments, resulting in the identification of two distinct clusters. Kernel density plots illustrate the relationship between MBT′5Me and IR ratio for the sediments, with cluster 1 in blue and cluster 2 in red. The regression lines represent the relationship between MBT′5Me and IR for each cluster. The histograms at the top and right of the plot show the distributions of MBT′5Me and IR, respectively. c The corresponding offsets (ΔMAF), defined as the difference between the reconstructed MAF based on brGDGTs and the observed MAF, were calculated for both clusters. The gray dashed lines indicate the median values for each cluster, with a difference of 2.7 °C between them.

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