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15.10.2018 | Original Paper | Ausgabe 1/2019

Biodiversity and Conservation 1/2019

Incorporating local-scale variables into distribution models enhances predictability for rare plant species with biological dependencies

Zeitschrift:
Biodiversity and Conservation > Ausgabe 1/2019
Autoren:
Hsiao-Hsuan Wang, Carissa L. Wonkka, Michael L. Treglia, William E. Grant, Fred E. Smeins, William E. Rogers
Wichtige Hinweise
Communicated by Daniel Sanchez Mata.

Electronic supplementary material

The online version of this article (https://​doi.​org/​10.​1007/​s10531-018-1645-4) contains supplementary material, which is available to authorized users.
Hsiao-Hsuan Wang and Carissa L. Wonkka have contributed equally to this work.

Abstract

The conservation of rare species is typically challenging because of incomplete knowledge about their biology and distributions. Species distribution models (SDMs) have emerged as an important tool for improving the efficiency of rare species conservation. However, these models must include biologically relevant predictor variables at scales appropriate for discriminating suitable and unsuitable habitat. We used a species distribution modelling tool, maximum entropy (Maxent), to assess the relative influence of biologically relevant topographic characteristics, land cover features, geological formations, and edaphic factors on the occurrence of the endangered endemic orchid Spiranthes parksii (Navasota ladies’ tresses). Our final model produced an excellent AUC value (0.984), with the permutation importance to model fit of predictor variables representing topographic characteristics, land cover features, geological formations, and edaphic factors summing to 8.17, 35.12, 10.43, and 46.28%, respectively. Local-scale edaphic variables were the most informative, with soil taxonomic units explaining the highest amount of variance (36.40%) of all variables included in the model. These results document the importance of local edaphic characteristics in discriminating between suitable and unsuitable habitat for S. parksii, and emphasize the importance of including local-scale edaphic factors in SDMs for species such as S. parksii with specialized habitat requirements and close relationships with other organisms.

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Zusatzmaterial
Supplementary material 1 (PDF 33 kb)
10531_2018_1645_MOESM1_ESM.pdf
Supplementary material 2 (PDF 220 kb)
10531_2018_1645_MOESM2_ESM.pdf
Supplementary material 3 (PDF 11 kb)
10531_2018_1645_MOESM3_ESM.pdf
Literatur
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