نتایج جستجو برای: management of natural ecological systems
تعداد نتایج: 21387558 فیلتر نتایج به سال:
Severe range degradation was critically extended in many region of Iran and caused many rangelands were restricted and interwoven with croplands in a complex system. Therefore, rangeland planning and inventory as an isolated activity has become almost impossible. Current landscape planning involves contributions of different social organizations often with different interests and with different...
magnetic resonance imaging (mri) is a notable medical imaging technique that makes of phenomenon of nuclear magnetic resonance. because of the resolution and the technology being harmless, mri has considered as the most desirable imaging technique in clinical applications. the visual quality of mri plays an important role in accuracy of medical delineations that can be seriously degraded by exi...
Abstract Background and objectives: Recognizing the property and evaluating the ecological capability of the natural ecosystem is one of the principles for proper management and planning in natural resources. Also, the preparation and implementation of practical plans in order to achieve economic and protective goals, requires knowledge of these properties and determining the potential of thes...
Fishery management programs designed to control Pacific salmon (Oncorhynchus spp.) for optimum production have failed to prevent widespread fish population decline and have caused greater uncertainty for salmon, their ecosystems, and the people who depend upon them. In this special feature introduction, we explore several key attributes of ecosystem resilience that have been overlooked by tradi...
The discussion of resilience in this book relates mainly to the properties of dynamical natural systems-especially to hydrological and ecological systems. In this chapter we consider the implications of the resilience of such systems for the economics of natural resources. To do this we revisit some of the fundamental assumptions of economic theory. We argue that where it is relevant to discuss...
The genotypic structure of parasite populations is an important determinant of ecological and evolutionary dynamics of host-parasite interactions with consequences for pest management and disease control. Genotypic structure is especially interesting where multiple hosts co-exist and share parasites. We here analyze the natural genotypic distribution of Crithidia bombi, a trypanosomatid parasit...
despite the different criticisms on contrastive analysis it has been proved that the results of it(when processed) can be useful in a tefl environment, specially at the level of phonology.this study is an attempt to compare and contrast the sound systems of kurdish and english for pedagogical aims.the consonants,vowels,stress and intonation of the two languages are described by the same model...
ecological destruction in human-dominated landscapes has significant impacts on environment sustainability internationally. landscape planning can play a role in mitigating the effects of human-related activities. one element of landscape planning involves the analysis of the biological, spatial and social arrangement of areas in an urban environment and identifying characteristics that are und...
One of the Millennium Ecosystem Assessment (MA) challenges is to “develop procedures that can integrate local knowledge with data collected at the regional or global level and produce information that is salient, credible, and politically legitimate to the decision makers that are a major audience for the results of the MA” (Millennium Assessment 2002). This paper aims to contribute to such eff...
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