基于GIS和InVEST模型的海岸带生态系统服务价值时空动态变化分析-以龙海市为例

本文选取地处海西城市群的漳州龙海市为研究区,基于联合国千年评估提出的生态系统服务框架,借助GIS技术、InVEST模型和经济价值模型评估方法,评估龙海近30 a(1986~2010)生态系统服务价值时空动态变化。结果表明:从1986至2010年,龙海生态系统服务价值整体呈降低趋势,尤其在南溪河口区、卓岐镇海区、海门岛及漳州开发区更为明显;龙海研究区域内生态系统服务价值存在明显空间差异性,单位面积生态系统服务价值较高为卓岐镇海区、漳州开发区、隆教湾、海门岛,人类干扰强度最大的龙海市中心为最低;龙海生态系统服务价值中养分调节、污染处理与控制及休闲娱乐价值明显高于其他服务价值,且七个分区生态系统服务主导功能存在明显差异,南溪河口区、海门岛、漳州开发区和紫泥岛有红树林的存在,红树林提供的气候调节和维持空气质量服务价值及防洪防潮稳定岸线服务价值较高。本研究可为龙海市海岸带空间规划和管理提供参考。

Spatiotemporal dynamics of coastal ecosystem services using GIS and InVEST:a case study in the Longhai City

This article uses GIS technology,InVEST model and economic valuation models as the assessment methods to assess the value and the spatial distribution of coastal ecosystem services in Longhai coastal city over the past 30 years (1986~1996) based on The Millennium Ecosystem Assessment framework proposed by the UN.The results reveal that the overall value of ecosystem services in Longhai City decreased between 1986 and 1996,especially in Nanxi Estuary,Zhuoqi Town district,Haimen Island,and zhangzhou development zone.The value of services provided by seven coastal zones in Longhai City varies spatially with Zhuoqi Town,Haimen Island,and Longjiao Estuary providing the much higher valuable ecosystem services value whereas Longhai City Center provides the least valuable ecosystem service value.Due to the presence of mangroves in Nanxi Estuary,Haimen Island,Zhangzhou Development Zone and Zini Island; the value of the ecosystem services provided by the mangroves are relatively higher in these areas.Of all the ecosystem services,Pollution treatment and control service,recreational and nutrient retention services have been revealed to be more valuable than other ecosystem services.This paper will potentially serve as a reference document to land managers for Longhai coastal spatial planning and management.