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研究报告

郭云,李鹏,程维金,肖之炎,穆泳林,智烈慧,李晓文.洞庭湖土地利用和生态服务功能时空变化及其耦合效应分析[J].环境科学学报,2022,42(1):121-130

Evaluation and complex relations analysis of ecosystem services based on spatial-temporal change of land use in Dongting Lake

摘要：生态系统服务价值及空间分布变化与土地利用方式的改变有密切关系，不同生态服务空间上也存在权衡和协同的复杂关系.基于1980年、1990年、2000年和2010年4期土地利用数据，利用InVEST模拟了洞庭湖区域历史5种生态服务功能的变化（碳储量、生境质量、产水量功能、水质净化功能和土壤保持功能），并采用生态系统服务权衡度模型（ESTD）对生态系统服务权衡关系进行评估.研究结果表明1980—2010年洞庭湖各土地类型相互转换面积比例不大，但转换频繁，5种生态服务功能价值除了产水量下降，均有小幅度上升.通过时空变化关系发现洞庭湖区域生境质量、碳储量和水质净化3种生态服务功能之间存在“协同”关系，且碳储量和生境质量以及水质净化呈显著相关性.但整体上看洞庭湖区域生态服务功能之间以“权衡”关系为主.林地面积的提升可以增加生境质量功能，同时增加洞庭湖区域碳储存量.土壤保持和产水量两种生态服务功能和土地利用类型的占比的相关性不大.农田的面积占比对洞庭湖区域5种生态服务功能的均有不同程度的影响.

Abstract：The change of ecosystem service and spatial distribution is closely related to the change of land use pattern. There are tradeoffs/synergies relations in different ecological service locations. Based on four land use data in 1980， 1990， 2000 and 2010， the spatial-temporal change of five ecosystem services of Dongting lake area （Carbon， Habitat quality， Water yeild， Water Purification and Soil conservation functions） was simulated using InVEST model， and ecosystem services tradeoffs/synergies relationship was evaluated. The results showed during 1980—2010， the transition area of each landuse type in Dongting Lake was small， but the inversion was frequent， and the five ecosystem services increased slightly except the water yield decreased. It is found that there is a synergy relationship among the service functions of Habitat quality， Carbon storage and Water Purification in Dongting Lake， while there is a tradeoff between carbon storage and habitat quality as well as water quality purification. On the whole， the tradeoff relationship of the ecosystem services is predominant in the Dongting Lake. Increasing forest area can increase the function of Habitat quality and Carbon storage in Dongting Lake. The relationship between Soil conservation and Water yeild is not significant. The ratio of cropland area has different effects on five ecosystem services in Dongting Lake area.