Landscape Change in an Agricultural Watershed: The Effect of Parcelization on Riparian Forest Cover
Landscape Change in an Agricultural Watershed: The Effect of Parcelization on Riparian Forest Cover
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农业流域的景观变化：区块化对河岸森林覆盖的影响
DOI：
10.1068/b230025
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发表时间：
1996
期刊：
影响因子：
--
通讯作者：
D. Erickson
中科院分区：
文献类型：
--
作者：
R. Kleiman;D. Erickson
在这项研究中，我们解决的因素有助于景观变化在中西部（美国）流域。具体而言，农业土地的分割（所有权细分）和河岸森林覆盖量的变化之间的关系进行了探讨。研究区域是密歇根州东南部的葡萄干河流域，这是典型的农村流域在较低的五大湖地区。流域内的两个乡镇进行了采样，从数据跨越20年的时间段。利用1968年、1978年和1988年的土地利用和土地覆盖数据，结合同年的所有权记录，我们确定了森林覆盖率和森林覆盖变化之间的关系。这些研究结果表明，河岸森林面积的增加趋势，在乡镇规模的土地分割增加。对于这两个乡镇，农业衰退和土地使用多样化似乎与河岸森林的面积和宽度呈正相关。随着耕种面积和农场数量的减少，土地被划分为越来越多、越来越小的地块，葡萄干及其支流等河流沿着的森林面积有所增加。有几个可能的因素，在乡镇和农场规模，可能会影响这种景观现象，包括土地使用政策，政府计划，农业机械化，农业经济。
In this research we address factors contributing to landscape change in a midwestern (USA) watershed. Specifically, the relationship between the parcelization of agricultural land (ownership subdivisions) and changes in amounts of riparian forest cover are explored. The study area is the River Raisin Watershed in southeastern Michigan, which is typical of rural watersheds in the lower Great Lakes region. Two townships within the watershed were sampled from data spanning a 20-year time period. Using land-use and land-cover data for 1968, 1978, and 1988, combined with ownership records for the same years, we determined a relationship between rates of parcelization and changes in forest cover. These findings indicate that increasing trends in riparian forest area follow increases in land parcelization at the township scale. For these two townships, agricultural decline and land-use diversification seem positively related to larger areas and widths of riparian forests. As the number of acres being farmed and the number of farms have decreased, the land has been divided into more and smaller lots and the forests along rivers like the Raisin and its tributaries have increased in area. There are several possible factors at the township and farm scale which may influence this landscape phenomenon, including land-use policies, governmental programs, agricultural mechanization, and agricultural economics.