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细菌中的物种数量。

Species Numbers in Bacteria.

作者信息

Dykhuizen Daniel

机构信息

Department of Ecology and Evolution, Stony Brook University, Life Sciences Building, Stony Brook, NY 11794-5245.

出版信息

Proc Calif Acad Sci. 2005 Jun 3;56(6 Suppl 1):62-71.

Abstract

A modified biological species definition (BSD), i.e., that bacteria exchange genes within a species, but not usually between species, is shown to apply to bacteria. The formal definition of bacterial species, which is more conservative than the modified BSD, is framed in terms of DNA hybridization. From this I estimate there are a million species of bacteria in 30 grams of rich forest topsoil and propose that there will be at least a billion species worldwide.

摘要

一种经过修正的生物物种定义(BSD),即细菌在物种内部交换基因,但通常不在物种之间交换,已被证明适用于细菌。细菌物种的正式定义比修正后的BSD更为保守,它是根据DNA杂交来界定的。据此我估计,在30克肥沃的森林表层土壤中存在100万个细菌物种,并提出全球至少有10亿个细菌物种。

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