【摘要】 基于2010年50 m空间分辨率森林分布图,我们利用森林破碎化模型制作了中国森林6个不同破碎化类型(内部森林、孔洞森林、边缘森林、斑块森林、过渡森林和未确定森林)的空间分布图。然后结合2010年中国行政区划图,对比分析了不同尺度行政区域的森林破碎化情况。结果表明:在国家尺度上,斑块森林的比例最大(49.05%),内部森林的比例最小(3.40%);在区域尺度上,东北地区森林破碎化程度最低,西南地区森林破碎化程度次之,华北平原、华中地区、山东半岛、黄淮海平原的森林破碎化程度最高;在省级尺度上,上海市森林破碎化程度最高,天津市次之,云南省及黑龙江省森林破碎化程度较低;在县级尺度上,陕西省所属的县森林破碎化程度最低。由此可知,总体上我国森林破碎化情况较为严重,但不同森林破碎化类型的空间分布存在较大差异。本研究可为各级林业部门管理森林资源以及优化林业生产和森林空间格局中提供数据支持,提高森林的生态系统服务功能和生物多样性保护功能。更多还原

【Abstract】 We used the forest fragmentation model to assess forest fragmentation in China based on a 50-m forest cover map in 2010.Six different fragmentation types including interior forest,perforated forest,edge forest,patch forest,transitional forest and undetermined were obtained.We reported the forest fragmentation status in different administration scales(by country,province,and county) based on Chinese administration boundary map of 2010,At the national scale,the patch forest accounted for the largest proportion(49.05%),while the interior forest was the smallest(3.40%).At the regional scale,Northeast China had the lowest forest fragmentation,while Southwest China had moderate forest fragmentation.The highest forest fragmentation areas were mainly distributed in the North China Plain,Central China,Shandong Peninsula and the Huang-Huai-Hai Plain.At the provincial scale,the highest forest fragmentation was located in Shanghai and Tianjin,and the lowest forest fragmentation was located in Yunnan Province and Heilongjiang Province.At the county scale,the lowest forest fragmentation was located in counties in Shaanxi Province.Overall,our results have clearly shown that forest fragmentation occurs extensively and varies substantially over China in 2010.Our study will provide data support for the forestry administrative sector to conduct better forest management and to optimize forestry production and forest spatial patterns,which can improve forest ecosystem services and biodiversity conservation.更多还原