三种森林生态系统昆虫病原真菌优势种生态位比较  

Niche comparison of dominant entomopathogenic fungi in three forest ecosystems

作　　者：陈名君[1] 黄勃[1] 李增智[1] 

机构地区：[1]安徽农业大学微生物防治安徽省重点实验室,合肥230036

出　　处：《应用生态学报》2011年第5期1275-1279,共5页Chinese Journal of Applied Ecology

基　　金：国家自然科学基金项目(30972368);安徽省优秀青年科技基金项目(08040106902);安徽农业大学引进与稳定人才科研启动项目(YJ2008-24);安徽农业大学青年科学基金项目资助

摘　　要：研究了天然阔叶林、天然阔叶次生林和马尾松人工纯林3种不同森林生态系统中昆虫病原真菌优势种的数量组成及生态位宽度和生态位重叠值.结果表明:球孢白僵菌在这3种森林生态系统中分别为第三、第一和第二优势种.该菌在3种森林生态系统中的营养生态位宽度和时间生态位宽度均最大,远大于环链棒束孢、粉棒束孢和细脚棒束孢等优势种;该菌与其他优势种的时间生态位重叠值较大,而营养生态位重叠值较小.球孢白僵菌在3种森林生态系统中都是发生时间最长、寄主昆虫最丰富、适应环境能力最强的昆虫病原真菌.An investigation was made on the quantitative composition,niche width,and niche overlap of dominant entomopathogenic fungi in three different forest ecosystems,i.e.,natural broad-leaved forest,natural secondary broad-leaved forest,and pure Masson＇s pine plantation.In the three forest ecosystems,Beauveria bassiana was the first dominant species in natural secondary broad-leaved forest,the second in pure Masson＇s pine plantation,and the third in natural broad-leaved forest.B.bassiana had the broadest temporal niche width and nutritional niche width,whereas the dominant species Isaria cateinannulata,I.farinose,and I.tenuipes had much smaller niche widths.Meanwhile,B.bassiana had larger temporal niche overlaps but smaller nutritional niche overlaps with other dominant entomopathogenic fungi.It was suggested that in the three forest ecosystems,B.bassiana had the longest occurrence duration,widest host range,and strongest environmental adaptability.

关 键 词：球孢白僵菌 相对多度 生态位宽度 生态位重叠 

分 类 号：S476.12[农业科学—农业昆虫与害虫防治] S718.81[农业科学—植物保护]