欢迎访问《生态学杂志》官方网站,今天是 分享到:

生态学杂志

• 研究报告 • 上一篇    下一篇

基于生态景观格局的松材线虫病分析及风险预测——以宜昌市为例

洪承昊1,2,张子一2,蔡三山2,陈京元2,宋德文3,理永霞4,张星耀4*   

  1. 1中国林业科学研究院森林生态环境与保护研究所, 北京 100091;2湖北省林业科学研究院, 武汉 430075;3宜昌市夷陵区黄花林业站, 湖北宜昌 443106;4中国林业科学研究院林业新技术研究所, 北京 100091)
  • 出版日期:2018-11-10 发布日期:2018-11-10

Analysis and risk prediction of pinewood nematodes based on landscape patterns: A case study from Yichang, China.

HONG Cheng-hao1,2, ZHANG Zi-yi2, CAI San-shan2, CHEN Jing-yuan2, SONG De-wen3, LI Yong-xia4, ZHANG Xing-yao4*   

  1. (1Institute of Forest Ecology, Environment and Protection, Chinese Academy of Forestry, Beijing 100091, China; 2Hubei Academy of Forestry, Wuhan 430075, China; 3Huanghua Forestry Station, Yichang 443106, Hubei, China; 4Research Institute of Forestry New Technology, Chinese Academy of Forestry, Beijing 100091, China).
  • Online:2018-11-10 Published:2018-11-10

摘要: 三峡库区周边县市松材线虫病疫情严重,给生态环境造成极大压力,传统的疫情处治方式需耗费大量的物力人力且效果小。利用景观生态学基本理论,以松材线虫病年均发生面积为统计基础,研究其与景观斑块和景观格局之间的关系,并据此进行疫情风险分析。通过宜昌全市和夷陵区、宜都市、市辖区两个尺度下斑块面积、斑块密度、形状指数、景观丰富度指数和Shannon多样性指数等斑块和景观格局指数评价景观现状,建立其与疫情之间的Pearson相关性,再据此对宜昌市辖区、宜都市和夷陵区进行插值风险分析。结果表明,夷陵区和宜都市疫情较为严重。研究区寄主斑块的面积和形状复杂程度和疫情有显著正相关性,相关系数为0.826和0.818;人为活动斑块和疫情间没有显著相关性;基于寄主斑块的插值风险分析表明,各区域需要对点状的大面积寄主斑块和形状复杂程度高的斑块进行重点清理,减小物力和财力的支出。

关键词: 冠层结构特征, 群体光合速率, 产量, 滴灌定额, 棉花

Abstract: The incidence of pine wilt disease (pinewood nematode) is severe around the Three Gorges area, which puts huge pressure on local environment. The conventional tactics of management for this pest costs too much resource but is not effective. Under the framework of patchcorridormatrix model, the relationships between annual incidence area of pinewood nematodes and landscape patch and landscape pattern were analyzed, and then outbreak risk was assessed. The interpolation risk analysis was carried out based on the Pearson correlation coefficients between the disease situation and pattern indices (CA, PD, LSI, PRD, and SHDI) on both levels of landscape (Yichang City) and patch (Yiling District, Yidu City, and Central District of Yichang City). The results showed that the incidence of pinewood nematodes was quite serious in Yiling District and Yidu City. The disease incidence area was positively correlated to the area of the host patches and their shape indices, with correlation coefficients of 0.826 and 0.818 respectively. There was no significant correlation between disease incidence area and human activity affected patches. The results of interpolation risk analysis showed that the fragmental large host patches and those with high shape index should be the key points of management to reduce expenditure on material and financial resources.

Key words: canopy apparent photosynthetic rate, yield, canopy structure characteristic, drip irrigation quota, cotton