Island food web: plants - herbivores - predators

Scenario

Environment

Fertility K

Water supply

Temperature

Pollution

Food web

Grazing rate a1

Hunting of top

Sim speed

Click tool

Disturbance

Tool radius

Live readout

time0

state-

plants-

vs baseline-

herbivores-

vs baseline-

predators-

vs baseline-

Shannon H'-

min / max plants-

plantsherbivorespredators

Populations over time

Phase portrait: plants vs herbivores

Model: logistic plants, Holling type II functional responses (Rosenzweig-MacArthur food chain, Hastings and Powell 1991). Temperature scales growth (Q10 1.5) and metabolic loss (Q10 2). Biomass in index units (x100). Shannon H' = -sum p ln p over the three trophic levels.