广西与广东沿海湿地生态系统健康评价

湿地是重要碳库,开展湿地生态健康评价对保护湿地、实现“碳达峰、碳中和”目标具有重要意义。提出了一种基于谷歌地球引擎(Google Earth Engine,GEE)平台和压力-状态-响应(pressure-state-response,PSR)与层次分析(analytic hierarchy process,AHP)模型的湿地健康评价方法。首先,选取广西及广东沿海为研究区,运用GEE平台提取湿地信息并计算遥感指数;然后,利用PSR模型从三个准则层(即压力、状态和响应)选取了13个指标,构建广西与广东沿海湿地生态系统健康评价指标体系;最后,利用AHP模型确定各指标权重,以市级行政区划为评价单元,通过加权求和获取各市压力得分、状态得分、响应得分以及综合得分来评价健康状况。结果表明,本文方法切实可行,能为湿地保护及修复提供科学依据。

Health Assessment of Coastal Wetland Ecosystems in Guangxi and Guangdong Based on the GEE Platform and PSR-AHP Model

Wetlands play a crucial role as carbon reservoirs, and it is imperative to conduct ecological health assessments to protect them and attain the goal of "carbon dioxide peaking and carbon neutrality." This paper proposes a wetland health evaluation method based on the Google Earth Engine (GEE) platform, the pressure-state-response (PSR) model, and the analytic hierarchy process (AHP) model. Initially, the coastal regions of Guangxi and Guangdong are selected as the study area, and the GEE platform is employed to extract wetland data and calculate remote sensing indices. Subsequently, 13 indicators are chosen from three criterion layers (i.e., pressure, state, and response) using the PSR model to form an index system for assessing the health of coastal wetland ecosystems in Guangxi and Guangdong. Finally, the AHP model is utilized to determine the weights of each index, and the municipal administrative divisions are selected as evaluation units to compute the pressure score, status score, response score, and overall score of each municipality, which can be employed to assess the health status. The outcomes demonstrate that the method in this paper is practical and feasible, and it can serve as a scientific basis for wetland conservation and restoration.