凌河口湿地自然保护区景观格局变化及功能区划分

Landscape Pattern Change and Division of Function Zones in Linghekou Wetland Nature Reserve

以1995年、2000年、2005年、2009年和2014年的TM影像为数据源,对辽宁省凌河口湿地自然保护区景观进行遥感分类,提取出8种景观类型的信息,得到其总面积及斑块数量,计算多样性指数、优势度指数、斑块密度和香农多样性指数,定量分析凌河口湿地的景观格局变化特征;根据人与生物圈计划(Man and the Biosphere Programme,MAB)提出的保护区功能区划分原则,结合研究区景观格局特征及湿地的实际状况,对凌河口保护区进行了功能区划分。结果表明,受人类活动影响,与1995年相比,2005年研究区景观破碎化程度加重;与2005年相比,2014年,由于对研究区湿地加强了保护,研究区景观破碎化程度稍减轻;划分出凌河口湿地自然保护区的核心区(305.88 km^2)、缓冲区(268.28 km^2)和实验区(261.59 km^2)。

Taking data of TM images in 1995, 2000, 2005, 2009 and 2014, choosing diversity index, dominance index, patch density index and shannon＇s diversity index, to study landscape pattern change and make division of functional zones of the Linghekou Wetland Nature Reserve, Liaoning province in this paper for 5periods. The information of 8 kinds of landscape types was extracted. The results showed that the extent of landscape fragmentation have augmented a lot with the effects of human activities from 1995 to 2005; and the extent of landscape fragmentation have declined relatively from 2005 to 2014. According to the rules put forward by Man and the Biosphere Programme of division of functional areas, the functional areas of the Linghekou Wetland Nature Reserve were divided into, including central, buffer and experiment zones, their areas were 305.88 km^2, 268.28 km^2 and 261.59 km^2, respectively.