نتایج جستجو برای: then is ecosystems

تعداد نتایج: 7393986  

Journal: :Bulletin of the World Health Organization 1997
W J Martens R Slooff E K Jackson

Human-induced climate change threatens ecosystems and human health on a global scale. In order to withstand the worldwide threats to ecosystems, the concept of sustainable development was introduced during the 1980s. Since then, this concept has been widely applied to guide and focus policy-making. The present article reviews the health consequences of human-induced climate change on sustainabl...

پایان نامه :0 1375

the significance of the study of deixis was then mentioned. the purpose of the present study from the outset was to provide a comprehensive overview of all kinds of deixis in persian, describing and defining each in true while considering them structurally and semantically. chapter two consisted of two main parts. a review of the english studies in this respect, besides presenting persian liter...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه علامه طباطبایی - دانشکده علوم اجتماعی 1393

the present study is paid to the evaluation of the welfare program of the unemployment insurance in iran. the main purpose which was the main reason for performing this thesis, was the unemployment insurance plan’s challenges in iran such as financial problems of this plan, prolongation of the credit receipt for some insured people, unemployment slow exiting from the unemployment insurance fund...

2006
Georgiana Puscasu Ruslan Mitkov

The adverb ”then” is among the most frequent English temporal adverbs, being also capable of filling a variety of semantic roles. The identification of anaphoric usages of ”then” is important for temporal expression resolution, while the temporal relationship usage is important for event ordering. Given that previous work has not tackled the identification and temporal resolution of anaphoric ”...

Journal: :Ecology letters 2011
J M K Rip K S McCann

Here, we review consumer-resource (C-R) theory to show that the paradox of enrichment is a special case of a more general theoretical result. That is, we show that increased energy flux, relative to the consumer loss rate, makes C-R interactions top heavy (i.e., greater C:R biomass ratio) and less stable. We then review the literature on the attributes of aquatic and terrestrial ecosystems to a...

Journal: :مرتع و آبخیزداری 0
مسلم برجی حسن گاویار کارشناس ارشد آبخیزداری، دانشکده منابع طبیعی، دانشگاه تهران، ایران هادی اسکندری دامنه دانشجوی دکتری بیابان زدایی، دانشکده منابع طبیعی، دانشگاه هرمزگان، ایران. حسن خسروی استادیار دانشکده منابع طبیعی، دانشگاه تهران، ایران

nowadays, temperature increase, rainfall decrease and its effect on the time dynamics of carbon fixation cycle still are faced by many uncertainties. net primary production (npp) is one of the main factors of carbon cycle; precipitation and temperature measurement are known as two useful tools to study different ecosystems stability and resilience in terms of climate. hence, in this study, npp ...

Journal: :Rocky Mountain Journal of Mathematics 2017

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