紫茎泽兰入侵受松小蠹危害的云南松林群落的研究

Study on the Invasion of Eupatorium adenophorum in Pinus yunnanensis Community Damaged by Tomicus spp.

探讨了紫茎泽兰对松小蠹危害成灾云南松林的入侵状况,对3个受灾云南松群落的结构、生物多样性指数、紫茎泽兰的入侵危害程度进行了研究,分析了松小蠹危害与紫茎泽兰入侵的相互关系。结果表明:松小蠹危害可通过影响群落结构而导致生境变化,增加了群落的可入侵性。群落结构越简单,生物多样性水平越低,对生境资源的利用越不充分,紫茎泽兰成功入侵的机会越大。松小蠹的危害导致云南松林退化,紫茎泽兰的入侵加剧了其生态系统的退化过程,成为影响森林生态系统健康状况的重要生态过程之一。

The invasion of Eupatorium adenophorum in Pinus yunnanensis stand damaged by Tomicus spp. was examined. The community structure, biodiversity index and invasion extent of three P. yunnanensis stands were determined and studied, and the correlation between Tomicus spp. damage and E. adenophorum invasion was analyzed. The results indicated that the Tomicus spp. damage could cause the change of habitat through affecting the structure of P. yunnanensis community, the existence of Tomicus spp. made the plant community more susceptive to the invasion of E. adenophorum. The probability of E. adenophorum invasion enhanced under simpler community structure, lower biodiversity and less sufficient use on habitat resources. The damage of Tomicus spp. caused the stand of P. yunnanensis degraded ; the invasion of E. adenophorum further speeded up the degradation of ecological system. E. adenophorum invasion has become a critical ecological process which closely related to the healthy of forest ecological system., , , , ,