Monthly Archives: April 2007


Simple geometric model of range-shift errors 7

A free pdf of Chaper 7 of Niche Modelling can be downloaded. Entitled ‘Bias’, a simple geometric model of range-shift illustrates my take on the problems of range-shift models. The model can be used to estimate exaggeration of reduction in range area due to climate change. The basic range-shift model is like a simple Venn […]