摘要:明确延河流域常见草本植物的潜在适生区分布，是植被恢复工作持续推进的基础。本研究收集了延河流域8种常见草本植物的地理分布信息和13个环境变量，采用MaxEnt和ArcGIS模拟了延河流域常见草本植物在当前气候下的潜在适生性分布，进而研究这8种不同草本植物适生性分布与功能性状变异特征之间的相关关系。研究结果显示：根据物种-性状排序图的分布格局判断，本研究选择的七个功能性状在植物所属科之间发生了明显趋异分化现象，在PC1右侧为禾本科植物，PC1左侧为菊科、豆科和唇形科植物。对物种适生性分布模拟结果表明，达乌里胡枝子在研究区内的适生性最高，百里香的适生性最低，表明达乌里胡枝子比其他常见草本物种更适合被选择为该流域的植被恢复的先锋物种。在功能性状变异特征相关性分析中，物种适生区大小与比叶面积变异系数呈显著正相关，与其他植物功能性状变异特征不显著。因此，比叶面积的变异系数更适合作为指示延河流域草本植物适生区大小的性状。



Abstract:Clarifying the distribution of potential suitable areas for common herb plants is the basis for the continuous advancement of vegetation restoration in the Yanhe River catchment. In this study, MaxEnt and ArcGIS were used to simulate the potential suitability distribution in the Yanhe River catchment under the current climate situation by collecting the geographic distribution information of 8 common herbaceous plants and 13 environmental factors. In addition, correlation analysis was conducted between habitat suitability and variation characteristics of multiple functional traits of 8 herbaceous species, the variation characteristics including variation coefficient and variation range. The results showed that the seven functional traits in this study had obvious differentiation among the families of the plants according to the distribution pattern of the species trait sequence diagram. There are significantly different in functional traits between different families. On the right side of PC1 was Gramineae, and on the left side were Compositae, Leguminosae and Labiatae. The simulation results of the species suitability distribution model suggests that the suitability areas of the herbaceous plants locates in the northwest of the Yanhe River catchment, as well as the Lespedeza daurica has the highest suitability in the study area, and Thymus mongolicus has the lowest suitability, which implies that the Lespedeza daurica is more suitable than other herbaceous species as a pioneer species for vegetation restoration in the Yanhe River catchment. In the correlation analysis of functional traits, the coefficient of variation about specific leaf area was significantly positively correlated with the distribution of species suitability, while the variation characteristics of other functional traits were not significantly correlated with the distribution of species suitability. Therefore, the coefficient of variation about specific leaf area is more suitable for indicating the size of herbaceous suitable area in Yanhe River catchment.





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