نتایج جستجو برای: land fragmentation

تعداد نتایج: 151571  

بهاءالدین نجفی محمد بخشوده,

Study of Some Costs of Land Fragmentation in Fars Province,.

ژورنال: :مجله علوم کشاورزی ایران 1991
محمد بخشوده بهاءالدین نجفی

study of some costs of land fragmentation in fars province,.

عبدالحسین احمدی, , امیرمظفر امینی, , عبدالحمید پاپ‌زن, ,

The purpose of this study was to assess characteristics of and reasons for farmers’ disagreement on implementation of land consolidation projects. Part of needed information was collected through questionnaire and interviewing 75 farmers in 6 unsuccessful villages in Kermanshah and Lenjanat region and also visiting some performed and ongoing projects. Other part of information was obtained by q...

2005
Ralph J. Alig David J. Lewis Jennifer J. Swenson

We investigated spatial configuration of economic returns, to enhance models of forest fragmentation for western Oregon and western Washington. Drawing from spatial land rent theory, economic drivers of forest fragmentation at the landscape level include land quality comprised of attributes such as soil fertility or the distance of urban plots to amenities. We included the spatial configuration...

ژورنال: علوم آب و خاک 2007
عبدالحسین احمدی, , امیرمظفر امینی, , عبدالحمید پاپ‌زن, ,

The purpose of this study was to assess characteristics of and reasons for farmers’ disagreement on implementation of land consolidation projects. Part of needed information was collected through questionnaire and interviewing 75 farmers in 6 unsuccessful villages in Kermanshah and Lenjanat region and also visiting some performed and ongoing projects. Other part of information was obtained by q...

Journal: :Remote Sensing 2017
Weiqi Zhou Sai Zhang Wenjuan Yu Jing Wang Weimin Wang

Urban expansion has significant effects on forest loss and fragmentation. Previous studies mostly focused on how the amount of developed land affected forest loss and fragmentation, but neglected the impacts of its spatial pattern. This paper examines the effects of both the amount and spatial pattern of urban expansion on forest loss and fragmentation. We conducted a comparison study in the si...

2017
Qiong Gao Mei Yu

Impact of changes in land cover and land use on hydrological service of tropical watersheds is one of the focal research tropics in both hydrology and Land Cover Land Use Changes (LCLUC). Land fragmentation is an important feature of LCLUC, however, its impact on hydrological service of tropical watershed is unclear despite a few theoretical frameworks. In this paper, we described a simulation ...

2016
Terefe Tolessa Feyera Senbeta Moges Kidane

Landscape dynamics are common phenomenon in the human-dominated environments whereby it can be observed that the composition and configuration between landscape elements change over time. This dynamism brings about habitat loss and fragmentation that can greatly alter ecosystem services at patch, class, and landscape levels. We conducted a study to examine composition and configuration of fores...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2007
Elena G Irwin Nancy E Bockstael

We investigate the dynamics and spatial distribution of land use fragmentation in a rapidly urbanizing region of the United States to test key propositions regarding the evolution of sprawl. Using selected pattern metrics and data from 1973 and 2000 for the state of Maryland, we find significant increases in developed and undeveloped land fragmentation but substantial spatial heterogeneity as w...

Journal: :محیط شناسی 0
لعبت زبردست دانشجوی دکتری برنامه ریزی محیط زیست، دانشکدة محیط زیست، دانشگاه تهران احمدرضا یاوری استادیار دانشکده محیط زیست دانشگاه تهران(ارزیابی و اکولوژی کوهستان) اسماعیل صالحی گروه مدیریت و برنامه ریزی دانشکدة محیط زیست دانشگاه تهران، دکتری شهرسازی مجید مخدوم استاد محیط زیست دانشکدة منابع طبیعی، دانشگاه تهران

fragmentation is one of the major spatial processes leading to change in a landscape, which is described as transformation of a specific habitat or land cover to smaller patches with less connectivity and viability. construction of roads is one of the main causes of fragmentation in natural areas and habitats. presence of roads in ecologically sensitive and protected areas, leads to destruction...

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