环境指示物是指能对环境条件起到指示作用的生物。它包括土壤的pH值，含氮量、地下水位、气温及阳光等重要指标，也包括土地的生产力、气候等复合因素。近年来，对大气污染，水质污染等的环境指示物已经引起重视。
生物标志物作为一种反映生物体系与环境相互作用所引起的变化的指示，已越来越广泛的应用于环境检测和风险评估中。
Biological marker, as an indicator for the change induced by the reaction of biological system and environmental factor, has been applied on environmental monitoring and risk assessment.
生物标志化合物具有稳定、保存时限长、分布广等特点，对气候和环境有很好的指示作用。
Biomarkers have the characteristics of stable compounds, long-time preservation and wide distribution, providing great information on climatic and environmental changes.
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