当阳市农业外来入侵植物调查与风险评估

Investigation and Risk Assessment of Agricultural Invasive plant in Dangyang city

摘要:

农业外来入侵植物已在全球范围内产生严重的生态安全问题,本研究在全面调查宜昌市当阳市农业外来入侵植 物现状的基础上,完善了外来入侵植物数据库,识别出物种分布格局,并运用层次分析法(AHP)对入侵植物的入侵等级进 行评估 。结果表明:①当阳市农业外来入侵植物共有 51种,隶属 18科 33属,其中菊科 16种,苋科 9种以及豆科 4种,种类 最多的属为苋属 6种 ; 当阳市农业入侵植物中有 35种来源于美洲地区, 占物种总数的 68. 7%;②当阳市外来入侵植物等级 较高, 已经对生境造成严重的威胁,恶性入侵种、严重入侵种、局部入侵种的物种数分别为 13种、9种、8种 。③当阳市农业 入侵植物中风险等级氛围 I ~V种, I 级植物有 8种 , "级植物 5种,Ⅲ级植物 6种,Ⅳ级植物 13种, V级植物 21种,入侵 风险等级较高 。④玉阳街道是各乡镇中农业外来入侵植物高风险、高爆发地区,共发现 30个物种, I 级和 " 级入侵物种 在该乡镇均有发现,需要对危害严重的物种和地区加强防治和监测。

Abstract:

Agricultural invasive alien plants have caused serious ecological security problems on a global scale, seriously aFFecting rural ecosystems and agricultural economic security. Based on the comprehensive investigation oFyichang dangyang agriculture based on the present situation oF agricultural invasive alien plants, improve the Dangyang invasive alien plants database, alien plants to identiFy the species distribution pattern, and using the analytic hierarchy process (AHP) to evaluate the invasion oFthe invasive plant level,provide basic data For Further agricultural invasive species in hubei province survey and evaluation methods . The results showed that ①Atotal oF51agricultural invasive species belong to 18Families and 33genera in Dangyang city, inclu- ding 16species oFcompositae,9species oFAmaranthus and4species oFlegumes . Amaranthus was the most abundant genus with 6 species; In Dangyang city,35invasive plants came From America, accounting For 68. 7% oFthe total species . ②The level oFinva- sive alien plants in Dangyang was relatively high, which had caused serious threats to the habitat. The number oFspecies belonging to malignant invasive species, severe invasive species and local invasive species were 13,9and8,respectively. ③The risKlevel was divided in to I~V 8species oFgrade I plants,5species oFgrade"plants,6species oFgrade Ⅲ plants,13species oFgrade Ⅳ plants and 21species oFgrade V plants in Dangyang city. ④yuyang subdistrict was a high-risK and high-outbreaK area in each town- ship, with a total oF30species Found. Both grade I and grade" invasive species were Found in the township, and 6high Frequency species were distributed in 10plots . The results showed that the invasive risKlevel oFalien invasive plants in Dangyang city was high, with obvious invasion hazards, and yuyang street was the most serious . It is necessary to strengthen the control and monito- ring oFthe seriously endangered species and areas .