نتایج جستجو برای: farmland fragmentation

تعداد نتایج: 38625  

Journal: :Landscape and Urban Planning 2022

Road construction is expanding worldwide, exacerbating both direct mortality by road-kills and habitat fragmentation, especially for mobile vertebrates such as bats. Understanding how road density affects bat communities in mosaic landscapes of various compositions configurations therefore critical. We acoustically sampled 172 southern France to: (i) disentangle the relative interacting effects...

2014
Thomas L. Daniels Tom Daniels

America's experience with farmland preservation is a combination of modest success and inconsistent farm policies. The successes--in terms of farmland acres preserved--have been concentrated in a relatively small number of counties, mainly in the Northeast and in California (see Sokolow and Zurbrugg, 2003). But nationwide there is a split between the farm income-oriented policies of the US fede...

2014
Weizhong Su Gaobin Ye

Since the 1980s a series of farmland policies have been implemented in China to stabilize the balance of farmland quantity and quality against accelerating urbanization and industrialization processes. This paper aims to reveal differences of soil fertility in the farmland occupation area (FOA) and farmland supplement area (FSA). In 1985-2000 the decline of the FOA area was 181,000 ha, but the ...

2012
Yapeng Zhou Lin Liu Yang Yang Ying Chen Hao Xu Wenting Zhao Na Hao

This paper points out that the irrational calculation of the social security price of farmland leads to the relatively low price of the land requisition price. This paper begins with the analysis of the social security function of farmland to farmers and puts forward the idea that the social security value of farmland should include the following four aspects, namely, the value of the endowment...

Journal: :Remote Sensing 2022

Farmland consolidation (FC) is among the measures to solve farmland issues, such as fragmentation, and its impact on ecological environment has always been controversial. In terms of long-term series large-area analysis, calculation a large amount data makes analysis ecological–environmental quality very difficult. To this problem, our study applied remote sensing index model Google Earth Engin...

2016
Linxiu Zhang Weiliang Su Tor Eriksson Chengfang Liu

Using three-wave survey data for four villages of Jiangsu Province in China, the present paper examines whether and to what extent off-farm employment affects the technical efficiency of agricultural production. The level of technical efficiency is measured using a stochastic frontier production function approach. Based on estimation results from instrumental variable panel quantile regressions...

2004
Gernot Segelbacher Ilse Storch Jürgen Tomiuk

© WILDLIFE BIOLOGY · 9:4 (2003) In landscapes altered by human activities, many species are restricted to small patches of habitat. Species that were once common have decreased both in distribution and density, and many have become extinct (Ceballos & Ehrlich 2002), mainly due to habitat deterioration, loss and fragmentation (Hilton-Taylor 2000). Previously contiguous populations have been turn...

2017
Xiaofeng Zhao Yuqian Zheng Xianjin Huang Yuntai Zhao

Rapid urbanization has accelerated farmland transfer in China, which in turn has increased the cultivation intensity of non-grain farmland (NGF). The aim of this paper was to analyze the spatial patterns of non-grain farmland (NGF) at municipal-level cities in China from 2000 to 2014, and explore the influence of urbanization and farmland transfer on the spatial patterns of non-grain farmland (...

2016
Nan Xia YaJun Wang Hao Xu YueFan Sun Yi Yuan Liang Cheng PengHui Jiang ManChun Li

Prime farmland (PF) is defined as high-quality farmland and a prime farmland protection area (PFPA, including related roads, waters and facilities) is a region designated for the special protection of PF. However, rapid urbanization in China has led to a tremendous farmland loss and to the degradation of farmland quality. Based on remote sensing and geographic information system technology, thi...

2010
JANA ŠKORPILOVÁ ALENA KLVAŇOVÁ RICHARD D. GREGORY

Analysis of an extensive European dataset confirms the large decline of widespread farmland birds across Europe. Common farmland birds have on average fallen in number by nearly half – the most severe decline of the bird groups considered. Among the 36 species that were classified as characteristic of farmland, 20 have declined, seven have increased, four have remained stable and trends of five...

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