The researchers used existing data sources to assess how much of the study area each of these habitats occupies and the patterns of landuse in each.
研究者们利用现有的数据资源来评估这些物种占地中每一部分研究领域所需的费用以及每块地使用形式。
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Most recently, a 2009 Stanford University study ranked energy systems according to their impacts on global warming, pollution, water supply, landuse, wildlife and other concerns.