Response of pine forest to disturbance of pine wood nematode with interpretative structural model |
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Authors: | Juan Shi Youqing Luo Xiaosu Yan Weiping Chen Ping Jiang |
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Institution: | (1) Key Laboratory for Silviculture and Conservation of Ministry of Education, Beijing Forestry University, Beijing, 100083, China;(2) Forest Pest Control & Quarantine Bureau of Zhejiang Province, Hangzhou, 310002, China |
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Abstract: | Pine wood nematode (PWN, Bursaphelenchus xylophilus), originating from North America, causes destructive pine wilt disease. Different pine forest ecosystems have different resistances
to B. 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 of Monochamus alternatus and 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.
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Translated from Scientia Silvae Sinicae, 2007, 43(8): 85–90 译自: 林业科学] |
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Keywords: | Bursaphelenchus xylophilus disturbance interpretative structural model resistance resilience |
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