Multiple Sources Forcing Driving Changes in Spatial Patterns of Coastal Wetland Vegetation  

作　　者：Jinping Sun Zhenxia Liu Binru Zhao Wen Luo Zhaoyuan Yu Linwang Yuan 

机构地区：[1]School of Geography,Nanjing Normal University,Nanjing,China [2]Ministry of Education,Key Laboratory of Virtual Geographic Environment(Nanjing Normal University),Nanjing,China [3]Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application,Nanjing,China

出　　处：《Ocean-Land-Atmosphere Research》2024年第1期223-237,共15页海洋-陆地-大气研究(英文)

基　　金：supported by the National Natural Science Foundation of China(grant numbers 42230406,42130103,42376223,and 42101078).

摘　　要：Vegetation evolution is an important indicator of regional ecosystems and sea-land interactions.In this study,we investigated the evolution of coastal wetland vegetation,focusing on the core area of Yancheng City National Rare Bird Nature Reserve.Using high-precision classification based on phenological characteristics,we delineated the evolutionary process of three predominant wetland vegetation types:Spartina alterniflora,Suaeda salsa,and Phragmites australis.Spatial and temporal patterns were analyzed using the generalized additive model to identify drivers of evolution.From 1990 to 2022,a three-stage shift in vegetation distribution from land to sea was observed.Notably,S.salsa’s distribution area consistently shrank since 2000,whereas P.australis continued to grow.Throughout the entire period,S.alterniflora consistently maintained growth and tended toward stability.The vegetation distinctly showcased zonal patterns along the coastal gradient,revealing a clear inclination to migrate toward the seaside.Specifically,S.alterniflora displayed a centroid migration rate of 195.28 m/year,shifting northward,whereas P.australis and S.salsa migrated eastward(toward the seaside)at rates of 111.84 and 70.88 m/year,respectively.Environmental factors,such as downward irradiance,sea surface salinity,and significant wave height,significantly influenced vegetation patterns.Human activities,particularly aquaculture pond construction,emerged as the primary anthropogenic factor causing the reduction in P.australis distribution.Additionally,the competition for ecological niches among vegetation emerged as a pivotal factor contributing to the alterations in the landscape pattern within the study area.

关 键 词：SPATIAL MIGRATE COASTAL 

分 类 号：P73[天文地球—海洋科学]