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Summer and winter habitat suitability of Marco Polo argali in southeastern Tajikistan: A modeling approach

We modeled summer and winter habitat suitability of Marco Polo argali in the Pamir Mountains in southeastern Tajikistan using these statistical algorithms: Generalized Linear Model, Random Forest, Boosted Regression Tree, Maxent, and Multivariate Adaptive Regression Splines. Using sheep occurrence d...

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Detalles Bibliográficos
Autores principales: Salas, Eric Ariel L., Valdez, Raul, Michel, Stefan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Elsevier 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5681343/
https://www.ncbi.nlm.nih.gov/pubmed/29159323
http://dx.doi.org/10.1016/j.heliyon.2017.e00445
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author Salas, Eric Ariel L.
Valdez, Raul
Michel, Stefan
author_facet Salas, Eric Ariel L.
Valdez, Raul
Michel, Stefan
author_sort Salas, Eric Ariel L.
collection PubMed
description We modeled summer and winter habitat suitability of Marco Polo argali in the Pamir Mountains in southeastern Tajikistan using these statistical algorithms: Generalized Linear Model, Random Forest, Boosted Regression Tree, Maxent, and Multivariate Adaptive Regression Splines. Using sheep occurrence data collected from 2009 to 2015 and a set of selected habitat predictors, we produced summer and winter habitat suitability maps and determined the important habitat suitability predictors for both seasons. Our results demonstrated that argali selected proximity to riparian areas and greenness as the two most relevant variables for summer, and the degree of slope (gentler slopes between 0° to 20°) and Landsat temperature band for winter. The terrain roughness was also among the most important variables in summer and winter models. Aspect was only significant for winter habitat, with argali preferring south-facing mountain slopes. We evaluated various measures of model performance such as the Area Under the Curve (AUC) and the True Skill Statistic (TSS). Comparing the five algorithms, the AUC scored highest for Boosted Regression Tree in summer (AUC = 0.94) and winter model runs (AUC = 0.94). In contrast, Random Forest underperformed in both model runs.
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spelling pubmed-56813432017-11-20 Summer and winter habitat suitability of Marco Polo argali in southeastern Tajikistan: A modeling approach Salas, Eric Ariel L. Valdez, Raul Michel, Stefan Heliyon Article We modeled summer and winter habitat suitability of Marco Polo argali in the Pamir Mountains in southeastern Tajikistan using these statistical algorithms: Generalized Linear Model, Random Forest, Boosted Regression Tree, Maxent, and Multivariate Adaptive Regression Splines. Using sheep occurrence data collected from 2009 to 2015 and a set of selected habitat predictors, we produced summer and winter habitat suitability maps and determined the important habitat suitability predictors for both seasons. Our results demonstrated that argali selected proximity to riparian areas and greenness as the two most relevant variables for summer, and the degree of slope (gentler slopes between 0° to 20°) and Landsat temperature band for winter. The terrain roughness was also among the most important variables in summer and winter models. Aspect was only significant for winter habitat, with argali preferring south-facing mountain slopes. We evaluated various measures of model performance such as the Area Under the Curve (AUC) and the True Skill Statistic (TSS). Comparing the five algorithms, the AUC scored highest for Boosted Regression Tree in summer (AUC = 0.94) and winter model runs (AUC = 0.94). In contrast, Random Forest underperformed in both model runs. Elsevier 2017-11-06 /pmc/articles/PMC5681343/ /pubmed/29159323 http://dx.doi.org/10.1016/j.heliyon.2017.e00445 Text en © 2017 The Authors http://creativecommons.org/licenses/by/4.0/ This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Salas, Eric Ariel L.
Valdez, Raul
Michel, Stefan
Summer and winter habitat suitability of Marco Polo argali in southeastern Tajikistan: A modeling approach
title Summer and winter habitat suitability of Marco Polo argali in southeastern Tajikistan: A modeling approach
title_full Summer and winter habitat suitability of Marco Polo argali in southeastern Tajikistan: A modeling approach
title_fullStr Summer and winter habitat suitability of Marco Polo argali in southeastern Tajikistan: A modeling approach
title_full_unstemmed Summer and winter habitat suitability of Marco Polo argali in southeastern Tajikistan: A modeling approach
title_short Summer and winter habitat suitability of Marco Polo argali in southeastern Tajikistan: A modeling approach
title_sort summer and winter habitat suitability of marco polo argali in southeastern tajikistan: a modeling approach
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5681343/
https://www.ncbi.nlm.nih.gov/pubmed/29159323
http://dx.doi.org/10.1016/j.heliyon.2017.e00445
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