关键词: 生态服务功能, 永久损害, 非使用价值量化, 条件价值法

Abstract: The scientific quantification of loss of ecological service functions serves as a crucial technical foundation and a key step in determining compensation amounts for ecological environmental damage cases. By benchmarking against the national standard series “Technical Guidelines for Identification and Assessment of Ecological Environmental Damage”, this study systematically reviews the methodological framework and assessment indicators for quantifying the loss of ecological service functions. The research highlights three major challenges in current judicial practice: controversies over non-use value assessment techniques, divergences in legal application, and gaps in institutional coordination. The study proposes improvement pathways, including establishing a quantification selection matrix at the levels of standard guidance and practical operation, formulating practical guidelines for non-use value assessment, improving explanatory mechanisms for technical investigators and expert jurors in ecological and environmental damage compensation cases, and strengthening funding support systems for quantification work, thereby facilitating the effective translation of scientific conclusions on loss of ecological service functions into judicial opinions.

Key words: ecological service function, permanent damage, quantification of non-use value, contingent valuation method