Isotopic variance among plant lipid homologues correlates with biodiversity patterns of their source communities
Fig 3
Bivariate relationships shared between surface-sediment LEWIS, δ13C31 values and fractional tree cover (MODISfwoody) estimates of (sub)tropical African source-region vegetation communities.
Larger circle sizes and darker shading (green) both represent increased fractional tree cover (c.f., Fig 1). Light blue shaded bounds indicate empirical 90% confidence intervals as calculated from a Monte Carlo method [92]. Asymptotic significance (p-value) is less than 0.0001 for all the relationships shown. A, Biomarker reconstructions of fractional tree cover (31fwoody) were calculated from δ13C31 values with a nonlinear equation [35]: B, Biplot between satellite-estimated fractional tree cover (MODISfwoody) and biomarker-reconstructed fractional tree cover (31fwoody). C, Relationship shared between surface-sediment LEWIS and δ13C31 values. Also shown are median values and the median absolute deviation of dominant PFTs (S1 Table) [15]: C3 woody plants [n = 37 (white diamond)], C3 forbs [n = 22 (double diamond)], and C4 grasses [n = 84 (black diamond)]. D, Relationship shared between surface-sediment LEWIS values and fractional tree cover (MODISfwoody) estimates.