نتایج جستجو برای: management of natural ecological systems

تعداد نتایج: 21387558  

Journal: :بوم شناسی کشاورزی 0
علیرضا کوچکی مهدی نصیری محلاتی افسانه امین غفوری منصوره محلوجی راد فرنوش فلاح پور

introduction due to its multifunctional nature agriculture play important roles in ecological processes such as carbon sequestration, flood control, groundwater recharge, nutrient cycling, and purifying water, soil and air in addition to providing food, feed and fiber. these cover almost all ecological services provided by natural ecosystems, including provisioning services, regulating services...

2013
Per Angelstam Michael Grodzynskyi Kjell Andersson Robert Axelsson Marine Elbakidze Alexander Khoroshev Ivan Kruhlov Vladimir Naumov

Policies at multiple levels pronounce the need to encompass both social and ecological systems in governance and management of natural capital in terms of resources and ecosystems. One approach to knowledge production and learning about landscapes as social-ecological systems is to compare multiple case studies consisting of large spaces and places. We first review the landscape concepts' bioph...

Journal: :محیط شناسی 0
فیروزه آقا ابراهیمی سامانی دانشجوی دکترای برنامه ریزی محیط زیست دانشکدة محیط زیست، دانشگاه تهران بهرنگ بهرامی دانشجوی دکترای برنامه ریزی محیط زیست دانشکدة محیط زیست، دانشگاه تهران اسماعیل صالحی گروه برنامه ریزی محیط زیست دانشکدة محیط زیست، دانشگاه تهران هما ایرانی بهبهانی دانشیار گروه مهندسی طراحی محیط دانشکدة محیط زیست، دانشگاه تهران رویا ساعتیان دانشجوی کارشناسی ارشد مهندسی طراحی محیط دانشکدة محیط زیست، دانشگاه تهران

variety of iran’s ecological structures has created many cultural landscapes. cultural landscapes, illustrate a combination of man’s persistent life and the art of land modification by means of natural environment and in the form of human settlements in past ages. currently, the human society’s development beside the scientific growth, man’s increasing use of natural resources and negative cons...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت مدرس - دانشکده علوم انسانی 1389

rivers and runoff have always been of interest to human beings. in order to make use of the proper water resources, human societies, industrial and agricultural centers, etc. have usually been established near rivers. as the time goes on, these societies developed, and therefore water resources were extracted more and more. consequently, conditions of water quality of the rivers experienced rap...

ژورنال: مدیریت سلامت 2007
ستایش برحقی, مهدی, علیزاده, محمد, کامکار حقیقی, مهران,

Introduction: To cope with natural and unnatural critical events such as air crashes, car accidents, chemicals and earthquakes or floods needs powerful resource management. Some of these critical events are tiny and by using local and available resources management could be resolved, but some cover extended geographical areas and so need a massive, vast resources and high level management for e...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه سیستان و بلوچستان 1390

cement is an essential ingredient in the concrete buildings. for production of cement considerable amount of fossil fuel and electrical energy is consumed. on the other hand for generating one tone of portland cement, nearly one ton of carbon dioxide is released. it shows that 7 percent of the total released carbon dioxide in the world relates to the cement industry. considering ecological issu...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت مدرس - دانشکده فنی 1391

the study of air infiltration into the buildings is important from several perspectives that may be noted to energy and design of hvac systems, indoor air quality and thermal comfort and design of smoke control systems. given the importance of this issue, an experimental and numerical study of air infiltration through conventional doors and windows has been explored in iran. to this end, at fir...

2011
Martin J. Bunch Karen E. Morrison Margot W. Parkes Henry D. Venema

In coupled social–ecological systems, the same driving forces can result in combined social and environmental health inequities, hazards, and impacts. Policies that decrease social inequities and improve social cohesion, however, also have the potential to improve health outcomes and to minimize and offset the drivers of ecosystem change. Actions that address both biophysical and social environ...

2015
Peter F. Newton Eric J. Jokela

Density management decision-support systems (e.g., modular-based structural stand density management models (SSDMMs)), which are built upon the modeling platform used to develop stand density management diagrams, incorporate a number of functional relationships derived from forest production theory and quantitative ecology. Empirically, however, the ecological integrity of these systems has not...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه محقق اردبیلی - دانشکده علوم کشاورزی 1391

abstract: the potato tuberworm, phthorimaea operculella (zeller), is an important insect pest of potato (solanum tuberosum l.) in the storage and field in most parts of the world especially in tropical and subtropical regions due to its close relationship with the host, high reproductive potential and high economic losses. information on host preference, life table parameters and digestive en...

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