دانلود رایگان مقاله لاتین پارامتر زیست محیطی از سایت الزویر


عنوان فارسی مقاله:

بررسی تاثیر پارامترهای زیست محیطی در توزیع ببر آمور در شرق روسیه با مدل MAXENT


عنوان انگلیسی مقاله:

Assessing the Influence of Environmental Parameters on Amur Tiger Distribution in the Russian Far East Using a MaxEnt Modeling Approach


سال انتشار : 2015



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مقدمه انگلیسی مقاله:

1. Introduction

Currently, predictive spatial modeling based on the analysis of environmental parameters is widely used in the fields of environmental protection, ecology, epidemiology, planning of protected areas and other areas (Thomas et al., 2004; Thuiller et al., 2005;Graham et al., 2006). When creating models of geographical distributions of species, if there are available data on the presence and absence of animals, general statistical approaches are typically applied. However, most data on the absence of species are scarce. Therefore, spatial modeling methods requiring only information on presence are needed (Graham et al., 2004; Phillips et al., 2006). One of these methods for analysis of the relationship between the locations of species and the environmental characteristics that determine the overall suitability for a given species is MaxEnt (Maximum Entropy). The purpose of this study is to demonstrate the possibility of using this method to assess the impact of environment parameters on the distribution of the Amur tiger in the Russian Far East. Once, a vast range of Amur tiger subspecies covered the southern part of the Russian Far East, North-East China and the Korean Peninsula (Pikunov et al., 2010). Intensive economic development of the region in the late XIX — early XX century resulted in catastrophic destruction and fragmentation of tiger habitats. Legal and illegal hunting of the Amur tiger in that period also led to a significant reduction in the population and habitats of this predator. Currently, the only viable population of this subspecies is preserved in the south of the Russian Far East (Pikunov et al., 2010; Miquelle et al., 1999, 2010). Natural reserves play an important role in maintaining the core population of the Amur tiger in the Far East. Due to enhanced protection in protected areas, there are a higher number of ungulates, less human disturbance, and therefore a higher number of adults and stable social structure of groups of Amur tigers leading to higher reproduction rates. However, the small area of nature reserves (3–4% of range of the Amur tiger in Russia) does not prevent further extermination of the predator (Carroll and Miquelle, 2006). Therefore, an understanding of what biological and anthropogenic parameters affect the spread of the tiger outside of the reserve is essential in order to support the establishment of new protected areas, ecological corridors between disjunct groups, as well as to form recommendations on land use management in tiger habitats.



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کلمات کلیدی:

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