A practical guide to MaxEnt for modeling species' distributions: what it does, and why inputs and settings matter
2013/06/18 by Cory Merow, Matthew J. Smith, John A. Silander · 53 citations
Environmental Science · #Ecology and Vegetation Dynamics Studies #Species Distribution and Climate Change #Wildlife Ecology and Conservation
paper · doi:10.1111/j.1600-0587.2013.07872.x
openalex publication_date 2013/06/18 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01
Abstract
The MaxEnt software package is one of the most popular tools for species distribution and environmental niche modeling, with over 1000 published applications since 2006. Its popularity is likely for two reasons: 1) MaxEnt typically outperforms other methods based on predictive accuracy and 2) the software is particularly easy to use. MaxEnt users must make a number of decisions about how they should select their input data and choose from a wide variety of settings in the software package to build models from these data. The underlying basis for making these decisions is unclear in many studies, and default settings are apparently chosen, even though alternative settings are often more appropriate. In this paper, we provide a detailed explanation of how MaxEnt works and a prospectus on modeling options to enable users to make informed decisions when preparing data, choosing settings and interpreting output. We explain how the choice of background samples reflects prior assumptions, how nonlinear functions of environmental variables (features) are created and selected, how to account for environmentally biased sampling, the interpretation of the various types of model output and the challenges for model evaluation. We demonstrate MaxEnt's calculations using both simplified simulated data and occurrence data from South Africa on species of the flowering plant family Proteaceae. Throughout, we show how MaxEnt's outputs vary in response to different settings to highlight the need for making biologically motivated modeling decisions.
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