Cited by 2,701Species Distribution and Climate ChangeEcology and Vegetation Dynamics StudiesWildlife Ecology and Conservation

Selecting thresholds of occurrence in the prediction of species distributions

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Liu, Canran, Berry, Pam M., Dawson, Terence P., Pearson, Richard G.·2005·Ecography

Abstract

Transforming the results of species distribution modelling from probabilities of or suitabilities for species occurrence to presences/absences needs a specific threshold. Even though there are many approaches to determining thresholds, there is no comparative study. In this paper, twelve approaches were compared using two species in Europe and artificial neural networks, and the modelling results were assessed using four indices: sensitivity, specificity, overall prediction success and Cohen's kappa statistic. The results show that prevalence approach, average predicted probability/suitability approach, and three sensitivity‐specificity‐combined approaches, including sensitivity‐specificity sum maximization approach, sensitivity‐specificity equality approach and the approach based on the shortest distance to the top‐left corner (0,1) in ROC plot, are the good ones. The commonly used kappa maximization approach is not as good as the afore‐mentioned ones, and the fixed threshold approach is the worst one. We also recommend using datasets with prevalence of 50% to build models if possible since most optimization criteria might be satisfied or nearly satisfied at the same time, and therefore it's easier to find optimal thresholds in this situation.

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Crossref · 10.1111/j.0906-7590.2005.03957.x

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  • The mean model TSS threshold maximizes specificity and sensitivity of the ROC curve and is particularly effective in presence-only data.

    “This threshold consisted of the mean model TSS criteria of model evaluation, also named ' maximum test sensitivity and speci fi city ' logistic threshold, which maximizes the speci fi city and sensitivity of the receiver operating curve ( i.e. , the ROC curve), and is particularly effective in presence-only data (Liu et al., 2005).”

    From Projecting future climate change impacts on the distribution of the ‘Octopus vulgaris species complex’ (2022) · cites this paper as Liu et al., 2005

    The Index describes a threshold that maximizes the sum of sensitivity and specificity and identifies its corresponding point on the ROC curve. The cited paper does not call it a mean model TSS or “maximum test sensitivity and specificity” logistic threshold, and its discussion of occupied and unoccupied sites does not establish that it is particularly effective for presence-only data. (LLM, conf=0.87)

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Research works printed but not linked: 2

  1. Berry, P. M. et al. 2001. Impacts on terrestrial environ- ments. Á/ In: Harrison, P. A., Berry, P. M. and Dawson, T. P. (eds), Climate change and nature conservation in the Britain and Ireland: modelling natural resource responses to climate change (the MONARCH project). UKCIP Tech. Rep., pp. 43 Á/150.
  2. Olden, J. D. and Jackson, D. A. 2001. Fish-habitat relationships in lakes: gaining predictive and explanatory insight by using artificial neural networks. Á/ Trans. Am. Fish. Soc. 130: 878 Á/ 897.

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Authors
Liu, C., Berry, P. M., Dawson, T. P., & Pearson, R. G.
Affiliations
  • University of New England (US)
  • University of Oxford (GB)
Venue
Ecography
Publisher
Wiley
Published
2005-06
Volume
28
Issue
3
Pages
385-393
ISSN
  • 0906-7590 (ISSN-L)
  • 1600-0587
OpenAlex
W2079018504
Cited by
2,701
References
40
Citations by year
2026: 133 · 2025: 175 · 2024: 166 · 2023: 145 · 2022: 163 · 2021: 180 · 2020: 142 · 2019: 168 · 2018: 169 · 2017: 151 · 2016: 140 · 2015: 137 · 2014: 146 · 2013: 166 · 2012: 157
FWCI
21.33
Type
journal article
Language
en
Open access
Locations
  • Ecography (publishedVersion)
  • ePrints Soton (University of Southampton) (submittedVersion)
  • UCL Discovery (University College London) (submittedVersion)
  • RUNE (Research UNE) (submittedVersion)
Funders
Ministry of Agriculture, Forestry and Fisheries
Topics
  • Physical Sciences › Environmental Science › Ecological Modeling › Species Distribution and Climate Change
  • Physical Sciences › Environmental Science › Nature and Landscape Conservation › Ecology and Vegetation Dynamics Studies
  • Physical Sciences › Environmental Science › Ecology › Wildlife Ecology and Conservation
Keywords
species distribution modeling, presence-absence prediction, prevalence, sensitivity and specificity, Cohen's kappa, ROC curve, artificial neural networks, model evaluation, threshold selection

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