This function returns a colonisation rate in a given abtiotic environment. This colonisation function is hump-shaped and its parameters allow for controlling the height and the width of the hump.
colonization(envir, maxcolo, opti, width)
envir | a real number giving the abiotic value. |
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maxcolo | extinction rate associated with the optimum value, it controls the height of the hump. |
opti | a real number giving the optimum value, i.e the abiotic values at which the colonisation rate is maximal. |
width | a real number controlling the width of the hump, the larger the wider the hump. |
Returns the colonisation rate associated with a given biotic environment.
Cazelles, K., Mouquet, N., Mouillot, D. & Gravel, D. On the integration of biotic interaction and environmental constraints at the biogeographical scale. (equation 9).