Study on the Changes of Landscape Pattern in Nansihu Wetland Based on RS and FRAGSTATS

Abstract

Abstract: By using 3 periods TM/ETM+ remote sensing data in 1987,1997 and 2008 and based on remote sensing,geographic information system and landscape ecology theory,selecting landscape pattern index in type level and landscape level,the quantitative analysis of the dynamic changes Shandong Nansihu wetland landscape pattern has been done in the paper.The results show that:(1)The general characteristics of landscape pattern are that significant changes have been found,the area of natural landscape decreasing and area of artificial landscape increasing.The degree of patch fragmentation is aggravating.The landscape patterns of reed land,lotus land and fish pond change most intensively.(2)with a view to the landscape index:at the type level,different landscape types have different change characteristics of index .At the landscape level,the number and density of patches have been increasing ;average patch area and contag index have been declining.Shannon diversity index and evenness index have been firstly increasing,then decreasing.(3)Looking from the transfer matrix,the changes of landscape pattern of Nansihu have begun in the former study period(1987-1997);and the rate of landscape pattern changes has become faster in the late study period(1997-2008).Every landscape changes to each other on a high rate,especially the landscapes of reed and lotus own very high rate of changing to other landscapes,and this transformation tends to happen from natural landscape patches to artificial landscape patches.

Key words: landscape pattern, dynamic change, landscape index, Nasihu wetland

CLC Number:

YU Quanzhou, ZHANG Zulu, GAO Bin, LU Jianshu, YUAN Yi. Study on the Changes of Landscape Pattern in Nansihu Wetland Based on RS and FRAGSTATS[J]. FOREST RESOURCES WANAGEMENT, 2013, (1): 108-115.

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