湖北省外来树种调查与入侵风险评价

Investigation and Risk assessment of Exotic Tree Species in Hubei Province

摘要:

基于文献资料和野外调查数据，分析湖北省外来树种的种类组成、分布状况和原产地信息，按照《外来树种对自然生态系统入侵风险评价技术规程》中的方法对湖北省外来树种进行入侵风险等级划分及评价。结果表明：①湖北省目前共有外来树种74种，隶属31科53属，其中豆科最多，有15种，松科次之的，有14种；乔木有49种，占总种数的66.22%，灌木有22种，占29.73%，木质藤本有3种，占4.05%。②全省各地均有外来树种分布，其中武汉市外来树种种类最多，有61种，其次为宜昌市有36种。③根据来源地分析，起源于北美洲的最多，有35种，占总数的47.30%，其次为亚洲，有17种，占22.97%。④入侵风险等级评价结果为低风险的树种有62种，中风险的树种有12种，未发现有高风险的树种。

Abstract:

The species composition, distribution and origin information of exotic tree species were analyzed via relevant literature and field surveys. The invasion risk of exotic tree species was classified and evaluated according to the method of Technical codes for invasion risk assessment of exotic tree species to natural ecosystem. The results showed that: ①A total of 74 exotic tree species were identified, which belonged to 53 genera and 31 families. The most common families represented were Leguminosae with 15 species, followed by Pinaceae with 14 species. 49 species of tree were found, accounting 66.22% of the total, shrub with 22 species (29.73%) and woody vines with 3 species (4.05%). ②Exotic tree species were found in all over the province, among which 61 species were found in Wuhan City, followed by 36 species in Yichang City. ③Literature records showed that 35 species originated from North America, accounting for 47.30% of the total, followed by Asia with 17 species, accounting for 22.97%. ④The evaluation results of invasion risk level showed that 62 species were rated as low risk, 12 species were rated as medium risk, and no species were found as high risk.