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 diagrams seen in the chapter excerpt below. Chapter 7 When climate change shifts climates over a landscape (dashed to solid circle) the response of a species to that Read more [...] 5 com