Figure 5. Correlation between the microbial community richness (a) and Faith’s phylogenetic diversity (b) in the ornithogenic sediments of Lake Y2, with the historical penguin population (c,d) and changes in the climate (e,f) in maritime Antarctica, over millennia.

Note: the data for figure d are from Sun et al. (2000)²¹, and the data for figures e and f are from Zhao (1991)⁵ and Xie (2001)⁷¹, respectively.