Evaluation and evolution analysis of water ecosystem service value in the yangtze river delta region based on meta-analysis

Rapid economic development, industrialization and urbanization lead to environmental pollution damage the stability of regional ecosystems. The Yangtze River Delta region is an economically developed in China, faces problems water environment ecosystem service degradation. Reasonable assessment value (ESV) great significance for grasping status services, improving ecological environment, realizing sustainable development. This study collects 119 research literature about including 156 observations establish a transfer database; specially builds Meta-analysis model variables climate conditions, protection, then assesses waters ESV using analyzes changes from 2009 2018. finds that location, population density, area site, average annual precipitation, characteristics, landscape wastewater discharge, protection expenditure, treatment costs can affect significantly. Based on meta-analysis benefit evaluate RMB 177,126 yuan/ hha/year growth rate 27.18%. place with highest per unit Shanghai, total Jiangsu Province highest. Economic waste discharge are main reasons differences services region. contribution this field includes broader set influencing variables, landscape, change protection. It provides practical reference local scale scientific basis management related development compensation, as well promote