盐城滨海湿地芦苇群落和互花米草群落对碱蓬群落挤压的时空变化特征  

Temporal and spatial characteristics of extrusion of Phragmites australis community and Spartina alterniflora community on Suaeda salsa community in Yancheng coastal wetland

作　　者：韩爽[1] 张华兵[1] 刘玉卿[1] 蔡青 王娟 王成 HAN Shuang;ZHANG Huabing;LIU Yuqing;CAI Qing;WANG Juan;WANG Cheng(North Jiangsu Institute of Agricultural and Rural Modernization,Yancheng Teachers University,Yancheng 224007,China;School of Electronic Science and Engineering,Nanjing University,Nanjing 210023,China;School of Economics and Management,Anhui Agricultural University,Hefei 230036,China)

机构地区：[1]盐城师范学院苏北农业农村现代化研究院,盐城224007 [2]南京大学电子科学与工程学院,南京210023 [3]安徽农业大学经济管理学院,合肥230036

出　　处：《生态学报》2024年第22期10309-10321,共13页Acta Ecologica Sinica

基　　金：国家自然科学基金项目(41771199,32201346);盐城市基础研究计划项目(YCBK202233)。

摘　　要：碱蓬是盐城滨海湿地土著物种,在生态功能维持中具有重要的意义。以盐城国家级自然保护区核心区为研究案例,以1983—2021年12期遥感影像为数据源,引入物理学库仑定律,分析芦苇群落和互花米草群落对碱蓬群落挤压的时空变化特征,结果如下:(1)芦苇、互花米草群落面积随时间呈线性增加,碱蓬群落面积呈先增加后减少的趋势。(2)芦苇群落对碱蓬群落的挤压力(F_(lj))呈线性增加,并以1992年和2002年为节点分为3个阶段;作用点轨迹以向东为主,移动了约4700 m。互花米草群落对碱蓬群落的挤压力(F_(mj))先增加后降低,同样表现出3阶段特征;轨迹点向西移动了约700 m,向北移动了约270 m。芦苇群落和互花米草群落对碱蓬群落综合挤压力(F_(合))呈线性增加,作用力方向2002年之前,在NNE向的左侧,2002年之后,在NE向的右侧;轨迹点向东北方向移动,以向东移动为主。(3)RDA排序能够反映碱蓬群落面积与F_(lj)、F_(mj)、F_(合)的关系,12个时期的碱蓬群落面积变量被F_(合)按照“三二一四”顺时针分布在4个象限;被变量F_(lj)、F_(mj)按照“三四一二”的顺序分布在4个象限,阶段性特征明显。(4)多元回归结果显示,F_(lj)对碱蓬群落面积的影响总体上大于F_(mj);景观格局指数ED、LSI、SHDI、AI与F_(lj)、F_(mj)、F_(合)表现出较高的相关性。研究结果可为盐城滨海湿地生态恢复和世界自然遗产地的可持续建设提供参考。The interaction between plant communities is an important source of biodiversity in coastal wetlands and the foundation for maintaining the diversity of coastal wetland ecosystems.Suaeda salsa is an indigenous species in Yancheng coastal wetland,which is of great significance in the maintenance of ecological functions.This paper took the core area of Yancheng National Nature Reserve as the research case,took the 12 remote sensing images from 1983 to 2021 as the data source,and introduced the Coulomb′s law to analyze the spatiotemporal change characteristics of Phragmites australis community and Spartina alterniflora community extrusion on Suaeda salsa community.The results showed that:(1)The area of Phragmites australis and Spartina alterniflora communities increased linearly with time,and the area of Suaeda salsa communities increased first and then decreased.(2)The extrusion force of Phragmites australis community on Suaeda salsa community(F_(lj))increased linearly and was divided into three stages with 1992 and 2002 as nodes.The track of the action point was mainly eastward,moving about 4700 m.The extrusion force of Spartina alterniflora community on Suaeda salsa community(F_(mj))increased at first and then decreased,which also showed the characteristics of three stages.The track point moved about 700 m to the west and 270 m to the north.The combined extrusion force of Phragmites australis community and Spartina alterniflora community on Suaeda salsa community(F_(合))showed a linear increase.The force direction was on the left side of NNE direction before 2002,and on the right side of NE direction after 2002.The track point moved to the northeast,mainly to the east.(3)RDA ranking can reflect the relationship among Suaeda salsa community area and F_(lj),F_(mj)and F_(合).The area variable of Suaeda salsa in 12 periods was distributed in four quadrants clockwise according to“three⁃two⁃one⁃four”by F_(合)and distributed in four quadrants in the order of“three⁃four⁃one⁃two”by F_(lj),and F_(m

关 键 词：群落 挤压力 库仑定律 滨海湿地 盐城国家级自然保护区 

分 类 号：Q948[生物学—植物学] X171.1[环境科学与工程—环境科学] X36