鄂西山地景观格局与松材线虫病扩散风险分析——以宜昌伍家岗为例

Landscape Pattern and Potential Analysis of Pine Wood Nematode Disease in the west of Hubei——a case study in Wujiagang

摘要:

摘要：本文分析伍家岗地区城市景观格局和马尾松林的斑块特征，以松褐天牛飞行距离作为因子，在区域尺度下分析了松材线虫病的扩散风险。结果表明：松材线虫病扩散风险性低，伍家岗区城市居民用地和灌木林地斑块面积最大，占总面积的34.95%和36.22%，破碎化程度低；灌木林地斑块数最多，达到215个，没有充足扩散条件；研究地林地斑块面积较小，仅占总面积10.88%，且破碎化程度高，斑块数达188个；林地中，马尾松纯林比例小，针阔混交林斑块密度高。针阔混交林风险较高，应加强风险斑块的管理，建立边缘隔离区、人工廊道；在城市建设工程中保护自然廊道，隔绝有害生物的自然传播和人为携带扩散。

Abstract:

Abstracts:This paper analyzed the landscape pattern and the patch characteristics of Pinus massoniana in Wujiagang Distrcit and studied the diffusive risk potential of Bursaphelenchus xylophilus at the regional scale. The results was showed as following: The area of urban residential land and shrubbery land in Wujiagang district was the largest, accounting for 34.95% and 36.22% of the total area respectively and the degree of fragmentation of the two lands was the lowest; The patches of shrubbery land were 215 and more than that of other lands, and had no condition for diffusion; The area of woodland patches was small, accounting for 10.88% of the total area, and the degree of fragmentation of the land was high, and the number of patches was 188 In woodland, the ratio of pure forest of Pinus massoniana was low and the patch density of theropencedrymion was high. In summary, the risk index of theropencedrymion was high; We should strengthen the controlling of risk patches, build marginal isolation regions and artificial corridors, and protect natural corridors during urban construction in order to insulate natural diffusion and artificial spreading of pests.