Comparison of non-parametric and parametric species distribution models (SDM) in determining the habitat of dominant rangeland species (Case study: Khetteh Riz Rangelands)

Kargar, Mansoureh; Jafarian, Zeynab; Tamartash, Reza; Alavi, Seyed Jalil

doi:10.22092/ijrdr.2018.117794

Document Type : Research Paper

Authors

¹ Ph.D. Student in Rangeland Sciences, Sari Agricultural Science and Natural Resources University, Iran

² Associate Professor, Sari Agriculture Science and Natural Resources University, Iran

³ Assistant Professor, Faculty of Natural Resources, Sari Agriculture Science and Natural Resources University, Iran

⁴ Assistant Professor, Faculty of Natural Resources and Marine Sciences, Tarbiat Modares University, Noor, Iran

https://doi.org/10.22092/ijrdr.2018.117794

Abstract

Ecologists and environmental managers emphasize the use of predictive models to examine the species distribution patterns. The purpose of the present study was to investigate the efficiency of the generalized linear model (GLM) and generalized additive model (GAM) in determining the relationship between vegetation and environmental factors in Khetteh Riz Rangelands. Environmental factors studied included soil characteristics, topographic factors and climatic factors. A classified-random sampling was performed and three dominant species, Bromus tomentollus, Ferula ovina, and Agropyron repens, were identified. The results showed that in the GLM model for Ferula ovina species, the variables of phosphorus content and slope were effective. For species Bromus tomentollus and Agropyron repens, the variables of annual moisture, rainfall, silt, and slope were effective. In the GAM model, the available moisture, silt and organic matter were the factors affecting the distribution of Ferula ovina. The silt, potassium, pH, and annual moisture content were the factors affecting the distribution of Agropyron repens. In addition, slope and silt were the variables affecting the distribution of Bromus tomentollus in the GAM model. The values of AUC, calculated for the GLM (0.63) and GAM (0.70), indicate the accuracy of the model to be acceptable.

Keywords

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Iranian Journal of Range and Desert Research

Comparison of non-parametric and parametric species distribution models (SDM) in determining the habitat of dominant rangeland species (Case study: Khetteh Riz Rangelands)

References

References

Volume 25, Issue 3
November 2018
Pages 512-523

Comparison of non-parametric and parametric species distribution models (SDM) in determining the habitat of dominant rangeland species (Case study: Khetteh Riz Rangelands)

References

References

Volume 25, Issue 3November 2018Pages 512-523

Volume 25, Issue 3
November 2018
Pages 512-523