Abstract

For the first time, a comparative study of the influence of two species of earthworms (Aporrectodea caliginosa and Lumbricus terrestris) on the composition of the prokaryotic complex of Umbric Albeluvisols was carried out using the methods of metagenomics. Prokaryotes in the soil and casts were represented mostly by Acidobacteria, Actinobacteria, Bacteroidetes, Chloroflexi, Gemmatimonadetes, Planctomycetes, Proteobacteria, and Verrucomicrobia phyla. The passage of soil through the earthworm intestines changed significantly the abundance of some taxa in the soil prokaryotic block, but not general indicators of biodiversity. In the casts of earthworms of both species, a decrease in the abundance of Acidobacteria and Gemmatimonadetes phyla, including predominantly oligotrophic bacteria, was observed. Casts of L. terrestris were characterized by an increase in the proportion of Actinobacteria and Firmicutes phyla, which were mainly represented by copiotrophs and hydrolytic bacteria. In addition, the abundance of Clostridiaceae anaerobic bacteria and Flavobacterium capable of nitrate respiration increased in the casts of L. terrestris, which could be due to the appearance of anaerobic conditions in the biogenically transformed soil. Generally, the changes in the taxonomic structure of prokaryotes in the soil treated by L. terrestris were greater than those in the soil treated by A. caliginosa. These differences among casts of different earthworm species could be due to the specificity of functioning of their digestive systems adapted to transformation of different food sources.

中文翻译：

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caliporosa caliginosa和Lumbricus terrestris铸型中的原核群落结构。

摘要

第一次，对两种species（Aporrectodea caliginosa和Lumbricus terrestris）的影响进行了比较研究。）使用宏基因组学方法对Umbric Albeluvisols的原核复合物的组成进行了研究。土壤和粪便中的原核生物主要表现为酸性细菌，放线菌，拟杆菌，嗜绿弯曲菌，双歧杆菌，浮游菌，变形杆菌和疣状微生物门（Verrucomicrobia phyla）。土壤通过worm肠的通过显着改变了土壤原核生物区系中某些分类单元的丰度，但并未改变生物多样性的一般指标。在这两种物种的the中，都观察到酸性细菌和门生菌门的丰度下降，包括主要是贫营养菌。陆地藜其特征是放线菌和门菌的比例增加，其主要表现为嗜食菌和水解细菌。此外，土生L. terrestris的茎中富含梭菌的厌氧细菌和黄细菌能够进行硝酸盐呼吸，这可能是由于在生物转化的土壤中出现了厌氧条件而引起的。通常，用陆地藜处理过的土壤中原核生物的分类结构的变化要比经加力农杆菌处理过的土壤中的原核生物的分类结构的变化大。。不同earth种类的粪便之间的这些差异可能是由于其消化系统适应特定食物来源转化的功能的特殊性所致。