首页   按字顺浏览 期刊浏览 卷期浏览 Evidence for Competitive Exclusion of Introduced Natural Enemies in Biological Control:...
Evidence for Competitive Exclusion of Introduced Natural Enemies in Biological Control: An Addendum

 

作者: L. E. Ehler,   R. W. Hall,  

 

期刊: Environmental Entomology  (OUP Available online 1984)
卷期: Volume 13, issue 1  

页码: -

 

ISSN:0046-225X

 

年代: 1984

 

DOI:10.1093/ee/13.1.v

 

出版商: Oxford University Press

 

数据来源: OUP

 

摘要:

The direct relationship between cigarette smoking and lung cancer is well known. However, this does not mean that all smokers will necessarily develop lung cancer or that nonsmokers will never contact lung cancer. The same kind of reasoning should be applied to the question of competitive exclusion of introduced natural enemies in biological control. In a previous paper, we established an inverse relationship between (1) the rate of (or percent) establishment of a large group of introduced predators and parasites and (2) the number of exotic incumbent species of natural enemies present and the number released simultaneously (see Ehler and Hall [1982] for details). We noted that the empirical evidence was consistent with the competitive-exclusion hypothesis and that therefore the hypothesis should not be rejected. We did not claim that competitive exclusion has occurred frequently or that our results were conclusive, as some have suggested, and we most certainly did not conclude that all (or most) establishment failures involving multiple-species introductions were due to competitive exclusion. Because too many people have read their own erroneous conclusions into our paper, we feel compelled to set the record straight.

 

点击下载:  PDF (274KB)



返 回