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依据景观生态学理论和研究方法,运用遥感和地理信息系统技术,对粤西南华农场3个时期土地利用与景观格局进行了分析与评价。结果表明,不同时期生产性用地中,斑块类型、斑块数目与面积变化较大。70年代,景观优势度较高,多样性和均匀性较低;80年代,随斑块类型和斑块数量的增加,景观多样性、均匀性显著增加,破碎化指数增大,景观格局发生较大变化;90年代,一些斑块类型逐渐消失,景观优势度、多样性和均匀性较80年代有所下降,斑块密度和破碎化指数已降至接近70年代水平。从景观格局动态变化的时序特征看,市场及经济发展政策的倾向性是导致景观格局阶段性变化的根源。
According to landscape ecology theory and research methods, using remote sensing and geographic information system technology, the land use and landscape pattern of South China farm in three phases of western Guangdong were analyzed and evaluated. The results showed that in different periods of productive land, the types of plaques, the number of plaques and the area changed greatly. In the 1970s, landscape dominance was higher and its diversity and uniformity were lower. In the 1980s, with the increase of patch types and patch numbers, landscape diversity and uniformity increased significantly, fragmentation index increased and landscape pattern occurred more In the 1990s, some patch types gradually disappeared. The landscape dominance, diversity and uniformity declined compared with the 1980s, and the patch density and fragmentation index had dropped to nearly the 70s. From the temporal characteristics of the dynamic changes of landscape pattern, the tendencies of market and economic development policies are the root causes of the phased changes in landscape pattern.