能源草生态风险评价体系的构建

Construction of the ecological risk assessment system for bioenergy grasses

为构建一套专门用来评估能源草生态风险等级的体系,本研究通过文献法与专家咨询法确立分布特征、扩散特征、繁殖特征、遗传特征、适应特征、危害特征和被控制特征7个方面共计33个与能源草生态风险评价相关的指标。然后通过yaahp10.1软件利用层次分析法对各指标进行权重赋值,进而构建相应的生态风险评价体系。最后选取10种已知生态风险等级的高大禾草对该体系进行检验,并依据检验结果对评价体系的生态风险等级层次进行划分。结果表明所构建的体系可以有效地辨别出不同物种的生态风险等级,并将风险等级层次划分为高危生态风险(系统评分>74.5),一定生态风险(系统评分在54.5～74.5)和基本无生态风险(系统评分<54.5)。

The aim of this study was to construct a dedicate ecological risk assessment (ERA) system for bioenergy grasses. The ERA system constructed in this study was composed by 33 questions related to ecological risk traits screened by literature and expert consultations. The trait's scoring process was calculated using the yaahp 10.1 software by analytic hierarchy process (AHP) method. Additionally, 10 tall herbaceous species, whose ecological risks were already defined, were used to test the accuracy of the ERA system. The results showed that the ERA system could accurately confirm the ecological risk of the evaluated plants. Based on the accuracy testing results, classification of the different ecological risk levels for our ERA system was conducted. The results were as following:species with the ERA score higher than 74.5 were defined as the species with high invasion risk (named ‘Rejection’);species with the scores of 54.5-74.5 were defined as uncertain ecological risk, which need further evaluation (named ‘Evaluate’);species with the scores lower than 54.5 were defined as the ecological safe plants (named ‘Accept’).