نتایج جستجو برای: cost of exploitation

تعداد نتایج: 21186035  

Journal: :مرتع و آبخیزداری 0
محسن سرشاد قهفرخی دانش آموخته کارشناسی ارشد مرتعداری دانشکده منابع طبیعی، دانشگاه صنعتی اصفهان، ایران سید علیرضا موسوی استادیار دانشکده منابع طبیعی، دانشگاه صنعتی اصفهان، ایران سعید سلطانی دانشیار دانشکده منابع طبیعی، دانشگاه صنعتی اصفهان، ایران سعید پورمنافی استادیار دانشکده منابع طبیعی، دانشگاه صنعتی اصفهان، ایران

natural resources are valuable capitals for all nations. rangelands as the most extensive natural ecosystems in iran provide numerous services, including fodder production and red meat supply, soil conservation and water regulation. although uncontrolled exploitation of these resources has imposed much pressure and caused many losses within the ecosystems. impacts of overutilization of nomadic ...

2016
Jessica L. Barker Judith L. Bronstein Laurent Keller

Exploitation in cooperative interactions both within and between species is widespread. Although it is assumed to be costly to be exploited, mechanisms to control exploitation are surprisingly rare, making the persistence of cooperation a fundamental paradox in evolutionary biology and ecology. Focusing on between-species cooperation (mutualism), we hypothesize that the temporal sequence in whi...

Journal: :Les Cahiers de droit 1971

Journal: :Ergo, an Open Access Journal of Philosophy 2016

Journal: :محیط شناسی 0
محمد رضا رضایی استادیار گروه جغرافیا دانشگاه آزاد اسلامی مرودشت حمید محمدی استادیار گروه اقتصاد کشاورزی دانشگاه زابل آیت اله کرمی استادیار گروه مدیریت توسعه روستایی دانشگاه یاسوج

water shortages is one of the main factors inhibiting economic and social development and agriculture in most developing countries, especially in countries located in arid and semi-arid belt of the world. the study tried to investigate the affecting factors on water resources exploitation with considering water utilization pattern and an emphasis on sustainable water use in fars province. due t...

Journal: :international journal of environmental research 0

the air in tehran is one of the most polluted airs in the entire world. because of the air pollution in the great tehran area, morbidity, mortality and symptoms emerge. this study has been conducted for the first time in iran. according to this study the total annual direct medical costs of morbidity estimated at us$ 3258255.48.our work also led to the estimation of an income elasticity of wtp ...

Journal: :Revue Forestière Française 1963

2013
Leanid Krautsevich Fabio Martinelli Stefanos Gritzalis

Services are software components or systems designed to support interoperable machine or application-oriented interaction over a network. The popularity of services grows because they are easily accessible, very flexible, provide reach functionality, and can constitute more complex services. During the service selection, the user considers not only functional requirements to a service but also ...

Journal: :International journal of environmental research and public health 2015
Yongkai An Wenxi Lu Weiguo Cheng

This paper introduces a surrogate model to identify an optimal exploitation scheme, while the western Jilin province was selected as the study area. A numerical simulation model of groundwater flow was established first, and four exploitation wells were set in the Tongyu county and Qian Gorlos county respectively so as to supply water to Daan county. Second, the Latin Hypercube Sampling (LHS) m...

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