Effect of distinct soil horizon and vegetation on soil microbiome abundance, composition, and activity of Arctic permafrost

Milankumar VARSADIYA, MSc.

Disertační práce

Effect of root exudates on organic matter decomposition and microbial community functioning in Arctic permafrost soils

Abstract:

In the present work, I studied the abundance, composition, and activity of soil microbial communities involved in the decomposition of soil organic matter (OM) in different horizons and under distinct tundra vegetation of Arctic permafrost soils. Special emphasis was given to buried topsoil caused by cryoturbation processes. The enzyme activity and their stoichiometry were also analyzed to determine the limitation of microbial carbon, nitrogen, and phosphorus. I also applied the metatranscriptomics approach to study the active microbial community in a complex view of all three domains of life (bacteria, archaea, Eukaryota). With this approach, we could better understand the potential role of microbial interactions (e.g., bacterial predation) in the carbon and nitrogen cycles of permafrost soils.

Jazyk práce: angličtina

Datum vytvoření / odevzdání či podání práce: 20. 5. 2022

Obhajoba závěrečné práce

• Vedoucí: doc. Ing. Jiří Bárta, Ph.D.

JIHOČESKÁ UNIVERZITA V ČESKÝCH BUDĚJOVICÍCH

Přírodovědecká fakulta

Doktorský studijní program / obor:
Biology / Ecosystem Biology