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In the article by Webber et al. (2011), some colours listed in the legend for Fig. 8a were incorrect.

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Figure 8.  Hypothetical response curves used by MaxEnt, boosted regression trees (BRT) and CLIMEX bioclimatic models. For the correlative models, the modelled ecological response curve (dash-dot lines) represents a reduced space relative to the physiological response curve (solid lines; sensu Austin, 1980) that is more closely approximated by CLIMEX. In extrapolation space, MaxEnt (a) has four options: ‘don’t extrapolate’ (dark green dashed lines), ‘clamp’ (light blue dashed lines), ‘don’t clamp’ (dotted red lines) and ‘fade by clamping’ not illustrated, which reduces values by the difference between clamped and nonclamped output). BRT models (b) consistently ‘clamp’ projections in extrapolation space (dashed blue lines). CLIMEX models (c) have closed response curves (red dotted lines) based on four defined values (minimum, optima, maximum; red circles) and use stress functions (grey shading) to further constrain the range boundaries beyond the curve minima and maxima.

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The correct legend, together with the figure, is shown below:

Reference

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  • Webber, B.L., Yates, C.J., Le Maitre, D.C., Scott, J.K., Kriticos, D.J., Ota, N., McNeill, A., Le Roux, J.J. & Midgley, G.F. (2011) Modelling horses for novel climate courses: insights from projecting potential distributions of native and alien Australian acacias with correlative and mechanistic models. Diversity and Distributions, 17, 9781000.