| 摘要: |
| 为建立相关模型,实现利用生物多样性指数评判林分抗虫性的目的,研究了林内昆虫的丰富度指数、物种多样性指数及均匀度指数等与林分害虫危害程度、林分结构变化之间的关系。阐述了评判林分抗虫性的常用物种多样性指数(Shannon-Wiener指数、Simpson指数、McIntoch指数)和均匀度指数(Pielou指数、Alatalo指数)及其应用中应注意的问题,论述了利用生物多样性评判林分抗虫性研究的基本内容与方法,讨论了林分抗虫性的多样性阈值研究方法。 |
| 关键词: 生物多样性指数 林分抗虫性 林分多样性阈值 |
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| 基金项目:教育部重点研究项目(03159);国家林业局黄土高原林木培育实验室基金项目(K02-10) |
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| Method for the judgement fundamentals of forestry resistance to pest by biodiversity index |
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| Abstract: |
| In theory,the biodiversity of insect community in natural forest will change as the forestry construction changes from pure forest to mixed forest in the same surrounding condition.These relations of insect community with forestry construction and Strength of Pest Harm (Sph) can be used to forecast the changing of forestry construction and their SPH.The above mentioned relations between the richness index,species diversity index,evenness index to SPH and forestry construction are investigated.If their interrelated model is built,the objective of judging forestry resistance to pest insect by biodiversity index could get.Based on this,Shannon-Wiener index,Simpson index,McIntoch index,Pielou index and Alatalo index are discussed,and the aim and method are expounded.Finally,the method of biodiversity measuring threshold of forestry resistance is discussed. |
| Key words: index of biodiversity forestry resistance to pest insect threshold of the forestry diversity |
