草业学报2018，Vol.27Issue(3)：24-32,9.DOI:10.11686/cyxb2017192
河北省森林草原区主要草本植物功能群适宜分布预测
Predicting suitable distribution of dominant herbaceous plant functional groups in a forest-steppe zone, Hebei, China
摘要
Abstract
Understanding the responses of herbaceous plant functional groups to environmental changes and their distribution pattern in a forest-steppe zone is helpful for clarifying the factors influencing different groups and for improving conservation strategies for herbaceous species diversity in the fragile landscape.A total of 184 sample plots (1 m× 1 m) were established and assessed using a stratified random sampling design in the Saihanba Nature Reserve,Hebei.Herbaceous plant species were divided into C3 and C4 functional groups.Twenty environment factors related to topography and climate were obtained from the ClimateAP (Climate Asia-Pacific) model and by utilizing GIS (Geographic Information System) spatial analysis techniques.The ecological niche model (MaxEnt) was adopted in predicting the potential distribution of both C3 and C4 plant functional groups.Our results showed that the area under the receiver operating characteristics curves (AUC) for the C3 and C4 were all over 0.8,indicating that the MaxEnt model had good predictive performance.The C3 functional group had a large potentially suitable distribution range,whereas the C4 functional group had a relatively small distribution in the study area,accounting for 61.99％ and 19.12％ of the total area,respectively.The main environmental factors affecting the distribution of C3 included:extreme maximum temperature,mean winter snow,degree-days above 5 ℃,mean annual temperature,and mean temperature of the coldest month.The main environmental factors affecting the distribution of C4 species included:extreme maximum temperature,degree-days above 5 ℃,mean annual temperature,mean annual precipitation,and mean winter snow.Accordingly,the results confirmed that C3 species potentially occurred in cooler and wetter conditions,whereas C4 species might tend to potentially occupy warmer and drier locations in the study area.The distribution range and area of C4 herbaceous species will probably increase in response to global climate warming.关键词
塞罕坝/环境因子/植物功能群/生态位模型/潜在分布Key words
Saihanba/environment factors/plant functional group/ecological niche model/potential distribution引用本文复制引用
范顺祥,郑建伟,魏士凯,黄选瑞,张志东..河北省森林草原区主要草本植物功能群适宜分布预测[J].草业学报,2018,27(3):24-32,9.基金项目
国家自然科学基金项目(31370636)和林业公益性行业科研专项(20150430304)资助. （31370636）
