Authors
Gentile Francesco Ficetola, Mathieu Denoël
Publication date
2009/12
Journal
Ecography
Volume
32
Issue
6
Pages
1075-1084
Publisher
Blackwell Publishing Ltd
Description
Habitat thresholds are usually defined as “points of abrupt change” in the species–habitat relationships. Habitat thresholds can be a key tool for understanding species requirements, and provide an objective definition of conservation targets, by identifying when habitat loss leads to a rapid loss of species, and the minimum amount of habitat necessary for species persistence. However, a large variety of statistical methods have been used to analyse them. In this context, we reviewed these methods and, using simulated data sets, we tested the main models to compare their performance on the identification of thresholds. We show that researchers use very different analytical tools, corresponding to different operational definitions of habitat thresholds, which can considerably affect their detection. Piecewise regression and generalized additive models allow both the distinction between linear and nonlinear dynamics …
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