Based on the theory of ecosystem health, healthy condition of urban forest ecosystem in Yan 'an was analyzed and assessed by setting diagnostic indicator system.
运用生态系统健康理论建立了城市森林健康评价指标体系，对延安市不同类型城市森林进行了分析评价。
Based on the theory of ecosystem health, healthy condition of urban forest ecosystem in Yan 'an was analyzed and assessed by setting diagnostic indicator system.
运用生态系统健康理论建立了城市森林健康评价指标体系，对延安市不同类型城市森林进行了分析评价。
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