Effects of the endemic earthworm .i.Allolobophora hrabei./i. (Černosvitov, 1935) on soil microbial communities of steppe grasslands

0429031 - BC 2015 RIV GB eng J - Článek v odborném periodiku
Jirout, Jiří - Pižl, Václav
Effects of the endemic earthworm Allolobophora hrabei (Černosvitov, 1935) on soil microbial communities of steppe grasslands.
Soil Biology and Biochemistry. Roč. 76, September (2014), s. 249-256. ISSN 0038-0717
Grant CEP: GA ČR GAP504/12/0536
Institucionální podpora: RVO:60077344
Klíčová slova: bacteria * archaea * fungi * community composition * DGGE * earthworm
Kód oboru RIV: EH - Ekologie - společenstva
Impakt faktor: 3.932, rok: 2014

Our current knowledge about the effects of earthworms on microbial communities derives from studies on a few peregrine species, and there is a lack of data for most of the uncommmon worms. Therefore, we studied the effects of Allolobophora hrabei (Černosvitov, 1935), a key earthworm species in fragile fragments of steppe ecosystems in central Europe. We found that the burrowing activity of A. hrabei as well as deposition of casts caused significant differences in the community composition of three domains of soil microorganisms icluding bacteria, archaea, and fungi. The richness of bacteria and fungi was significantĺy lower in casts than in the surrounding soil, however, that of archaea showed the opposite trend. Archaea and fungi were lass susceptible to the burrowing activity than bacteria; earthworms significantly shifted the composition of bacterial communities between the soil and drilosphere. Deposition of casts was the main factor in affecting soil microorganisms. Cast profiles of all three microbial domains created separate clusters, indicating significantly different communities at all monitoring sites in both years of the study. In general, the activity of A. hrabei can be considered as an important factor that affects the soil microbial communities, and its casts represent a substantial habitat for selected soil microorganisms in steppe grasslands.
Trvalý link: http://hdl.handle.net/11104/0244893