Response of pine forest to disturbance of pine wood nematode with interpretative structural model
Response of pine forest to disturbance of pine wood nematode with interpretative structural model
复制标题
DOI：
10.1007/s11461-009-0020-8
复制
发表时间：
2009-01
期刊：
影响因子：
--
通讯作者：
Juan Shi;Youqing Luo;Xiao-su Yan;Wei-ping Chen;P. Jiang
中科院分区：
文献类型：
--
作者：
Juan Shi;Youqing Luo;Xiao-su Yan;Wei-ping Chen;P. Jiang
松材线虫是一种原产于北美的松材线虫，引起毁灭性的松材线虫病。不同的松林生态系统对Tob的抗性不同。松材线虫入侵后，不同生态系统的恢复力和恢复方向也不同。应用解释结构模型分析了松林生态系统对松材线虫干扰的响应。结果表明，松林生态系统对PWN干扰的响应是一个五度多阶段递阶系统，其中直接影响因子是抗性和恢复力。对2、3、4度因子的分析表明，不仅植物种类的分布格局和松树的生态特性影响松林生态系统的抗性，而且除害等措施也通过间接影响松墨天牛的危害程度和植物种类的分布格局来影响松林生态系统的抗性。至于复原力，则直接受土壤因子、水文、周围物种种源和次优势种和联合优势种生物学特性的影响，气候因子也可通过影响上述因素对其产生直接或间接的影响。在第五要素中，海拔、坡度和坡向、地形因素、地理位置的多样性和防护技术的改进都会影响松林生态系统对松材线虫干扰的响应。
Pine wood nematode (PWN,Bursaphelenchus xylophilus), originating from North America, causes destructive pine wilt disease. Different pine forest ecosystems have different resistances toB. xylophilus, and after its invasion, the resilience and restoration direction of different ecosystems also varies. In this study, an interpretative structural model was applied for analyzing the response of pine forest ecosystem to PWN disturbance. The result showed that a five-degree multi-stage hierarchical system affected the response of the pine forest ecosystem to PWN disturbance, in which direct affecting factors are resistance and resilience. Furthermore, the analysis to the 2nd, 3rd and 4th degree factors showed that not only does distribution pattern of plant species and pine’s ecological features affect the resistance of pine forests’ ecosystem, but removal of attacked trees and other measures also influence the resistance through indirectly affecting the damage degree ofMonochamus alternatusand distribution pattern of plant species. As for resilience, it is influenced directly by soil factors, hydrology, surrounding species provenance and biological characteristics of the second and jointly dominant species, and the climate factors can also have a direct or indirect effect on it by affecting the above factors. Among the fifth elements, the elevation, gradient and slope direction, topographical factors, diversity of geographical location and improvement of prevention technology all influence the response of pine forest ecosystem to PWN disturbance.