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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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中国东北地区森林覆被变化的原因与趋势
DOI: 10.11821/xb201002009, PP. 224-234
Keywords: 林地,面积变化,计量经济模型,土地系统动态模拟系统,东北地区
Abstract:
以中国东北地区森林覆被变化为研究对象,构建了涵盖林业生产、疏林地向有林地转换和其他用地向有林地转换三个方程组成的计量经济模型,研究了自然环境条件和社会经济因素对森林覆被变化的驱动作用。在此基础上,应用土地系统动态(DLS)模拟系统预测了2000-2020年在环境保育情景、基准情景和发展优先情景下中国东北地区森林覆被变化的趋势。研究结果表明,自然环境条件是森林覆被变化的重要控制因素,对林业生产和林地面积转移有显著的制约作用;区位条件、退耕还林政策和天然林保护工程等社会经济因素也均在不同程度影响了东北地区森林覆被的变化。在2000-2020年间,东北地区林地面积整体将呈现增长态势。其中,有林地面积逐年增长,而疏林地和灌木林地均有所下降,其他林地变化幅度较小。本研究结论将为东北地区森林资源开发利用与保护、林业发展规划提供决策参考信息。
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