热带雨林景观空间异质性分析——铜壁关自然保护区森林景观范例

Analysis on the Spatial Heterogeneity of Tropic Rainforest——A case study on the forest landscape in Tongbiguan Nature Reserve

通过航空遥感图像、森林分布图和土地利用数据,对云南铜壁关自然保护区森林景观进行研究,测定该保护区森林景观的空间异质性.结果显示:该地森林景观由16种组分组成.其中,季风常绿阔叶林和热带山地雨林斑块占优势,但斑块破碎度较高,且相互隔离,呈孤岛状;几大森林斑块间应建立生物廊道,促进物种交流;保护区中尚存一定的农地斑块,人类活动频繁,是保护对象的潜在威胁;应进行退耕还林,促进其自然生境的恢复.

The spatial heterogeneity of the forest landscape of the tropical rainforest of Tongbiguan Nature Forest was studied by means of analyzing aerial - photograph, map of forest distribution, and information about land utilization. The results showed that the forest landscape of the area consisted of 16 components, among which the patches of monsoon evergreen broad - leaved forest and tropical mountainous rainforest dominated the general landscape. However, these patches were sparsely distributed and isolated in island forms. It was proposed that some biological corridors should be built among large forest patches in order to enhance species exchange. In addition, there are some farmland patches in Tongbiguan Nature Reserve, the frequent anthropogenic activities in the surrounding area are potential threats to conservation targets. Carrying out the national project of ＂Converting the Sloping Farmland to Forests＂ in the area will be beneficial to restore the natural ecological environment in the nature reserve.