Coevolution and the Effects of Climate Change on Interacting Species (original) (raw)
Figure 2
Competition equilibrium densities and traits.
Equilibrium population densities (A, B) and trait values (C, D) for two competing species at different climatic conditions. The intrinsic rate of increase of species 1 (solid lines) increases linearly with climate E, while the intrinsic rate of increase of species 2 (dashed lines) is unaffected. Results are for conflicting competition, d<0 (A, C), and nonconflicting competition, _d_>0 (B, D). Red lines give eco-evolutionary equilibriums assuming high genetic variation (_V_1, _V_2>>0), whereas for blue lines there is no evolution (_V_1 = _V_2 = 0). The trait value (shown on the _y_-axis of C, D) for species i dictates the strength of competition felt by species i per capita of species j. The _x_-axis represents the climatic effect on the intrinsic rate of increase of species 1, b1E. For the conflicting case (A, C) parameter values used were: _R_1 = _R_2 = 0.1, d = −0.9, _b_1 = 0.001, _b_2 = 0, and f = 0.45. For the nonconflicting case (B, D) parameter values used were as follows: _R_1 = _R_2 = 0.1, d = 0.5, _b_1 = 0.01, _b_2 = 0, and f = 0.02.