Fig 4. Structure and stability of resource dynamics depend on ecological regime.

(A) Consumed energy fluxes $(1-l)J_{i\alpha }^{\text{in}}$ for each of the ten surviving species in a resource-limited community (example 2 from Fig 2). The black portion of the bar is the flux $(1-l)J_{i0}^{\text{in}}$ due to the externally supplied resource, and the colored bars represent the contributions of the other resources. Since these communities have reached the steady state, Eq (3) implies that the total height of each bar equals the maintenance cost m_i of the corresponding consumer species. (B) Same as previous panel, but for a community from the diverse regime (example 3 from Fig 2). (C) Simpson diversity $M_i^{\text{eff}}$ of steady-state flux vector $J_{i\alpha }^{\text{in}}$ for each species from examples 2 (resource-limited) and 3 (diverse) in Fig 2. Vertical lines indicate the values of this metric when all the flux is concentrated on a single resource (“Specialist”), and where it is evenly spread over ten resource types (“Generalist”). (D) Logarithm of susceptibility ${log}_{10}\partial {\overline{R}}_{\alpha }/\partial {\kappa }_{\alpha }$ of community-supplied resources (α ≠ 0) to addition of an externally supplied flux κ_α in these two examples.