江苏省盐城海岸湿地景观时空演变特征研究  

Landscape Spatial and Temporal Evolutions of Yancheng Coastal Wetlands in Jiangsu Province

作　　者：张华兵[1,2] 刘红玉[2] 郝敬锋[2] 

机构地区：[1]江苏省滩涂生物资源与环境保护重点建设实验室,盐城师范学院城市与资源环境学院,江苏盐城224051 [2]南京师范大学地理科学学院,江苏南京210046

出　　处：《水土保持通报》2012年第6期226-229,共4页Bulletin of Soil and Water Conservation

基　　金：江苏省滩涂生物资源与环境保护重点建设实验室开放基金项目“盐城海滨湿地景观格局变化及生态环境效应研究”(JLCBE10007);国家自然科学基金项目(41071119);江苏省高校自然科学研究重大项目(10KJA170029)

摘　　要：以盐城海岸湿地为研究对象,根据1987,1997,2007年3个时相的景观资料,运用RS和GIS技术,选取景观转移概率、质心两大指标,对两个时段海岸湿地景观时空演变特征进行了分析。结果表明:(1)景观结构变化。1987-2007年,自然湿地比重不断下降,由42.45%降至21.44%;人工湿地比重不断上升,由18.19%上升到58.88%。景观转移主要由自然湿地向人工湿地和非湿地转移:1987-1997年自然湿地向人工湿地和非湿地转移了45.40%;1997-2007年自然湿地向人工湿地和非湿地转移了37.91%。景观异质性呈现先升后降的特征。(2)景观质心变化。1987-1997年人工湿地向东南偏移了58.17km,自然湿地向东南偏移了6.15km;1997-2007年人工湿地向东南偏移了12.67km,自然湿地向东南偏移了7.15km。Taking Yancheng coastal wetlands as an example,we analyzed the spatial and temporal evolution characteristics of coastal wetlands landscape about two periods based on the years of 1987,1997 and 2007 landscape images.We used two landscape ecology indicators： transition probability and centroid,with the technologies of RS and GIS.The results indicated that both the landscape structure and centroid changed from 1987 to 2007.Firstly,the percentage of natural wetland dropped from 42.45% to 21.44%,but the artificial wetland rose from 18.19% to 58.88%.During the former decade,45.40% of the natural wetlands were transferred to the artificial wetlands or the non-wetland;while in the later decade,additional 37.91% of the natural wetlands were transformed,leading to an increased and then decreased landscape heterogeneity over the time.Secondly,both the natural and the artificial Landscape centroid shifted to the southeast from 1987 to 2007.From 1987 to 1997,the artificial wetland centroid moved 58.17 km and the natural wetland centroid did 6.15 km,while from 1997 to 2007,they shifted additional 12.67 and 7.15 km,respectively.

关 键 词：景观格局 景观转移矩阵 质心 盐城海岸湿地 

分 类 号：F301.24[经济管理—产业经济] P94[天文地球—自然地理学]