Access Regimes and Regional Land Change in the Brazilian Cerrado, 1972–2002
Access Regimes and Regional Land Change in the Brazilian Cerrado, 1972–2002
复制标题
巴西塞拉多的准入制度和区域土地变化，1972-2002 年
DOI：
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
A. Filippi
中科院分区：
文献类型：
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作者：
W. Jepson;C. Brannstrom;A. Filippi
我们研究如何访问制度，由一组相互关联的机构和组织，促进了生产资源和利益的流动，导致在巴西塞拉多的土地变化的模式。我们分析了遥感数据（Landsat MSS，TM，+ETM）的三个时间段（1972/1973-1986年，1986-1992年，1992-2002年）的定性和档案数据，马托格罗索州东部。总的来说，我们发现，私人殖民的土地比没有殖民计划的土地更迅速和更广泛地被清除。我们还确定了显着的空间变异性塞拉多转换内和外殖民区和塞拉多转换的年速率在每个时期的变化。我们解释说，在塞拉多的农民从事土地租赁和生产合同，并通过合作社和公司的工作，以汇集资源，包括信贷，技术和投入，这反过来又影响了土地利用的决定和土地覆盖变化的区域模式。我们的结论是，一个中尺度的分析框架，研究土地管理者如何获得自然和生产资源提供了有用的见解，解释的过程，导致模式的高投入农业扩张。
We examine how access regimes, defined by a set of interrelated institutions and organizations, facilitated the flow of production resources and benefits that resulted in patterns of land change in the Brazilian Cerrado. We analyzed remotely sensed data (Landsat MSS, TM, +ETM) for three time periods (1972/1973–1986, 1986–1992, 1992–2002) with qualitative and archival data for eastern Mato Grosso state. Overall we found that land privately colonized was cleared more rapidly and extensively than lands under no colonization scheme. We also identified significant spatial variability in Cerrado conversion within and outside colonization areas and variability of annual rates of Cerrado conversion during each period. We explain that farmers in the Cerrado engaged in land-leasing and production contracts and worked through cooperatives and firms to marshal resources, including credit, technology, and inputs, which, in turn, influenced land-use decisions and regional patterns of land-cover change. We conclude that a mesoscale analytical framework that examines how land managers access natural and productive resources provides useful insights to explain the processes that cause patterns of high-input agricultural expansion.