| Autor: |
Bereczki K; Doctoral School of Environmental Sciences, Eötvös Loránd University, 1117 Budapest, Hungary.; Department of Forest Management and Ecology, Forest Research Institute, University of Sopron, 9600 Sárvár, Hungary., Tóth EG; National Coalition of Independent Scholars (NCIS), Brattleboro, VT 05301, USA., Szili-Kovács T; Institute for Soil Sciences, Centre for Agricultural Research, 1022 Budapest, Hungary., Megyes M; Doctoral School of Environmental Sciences, Eötvös Loránd University, 1117 Budapest, Hungary., Korponai K; Department of Plant Molecular Biology, Agricultural Institute, Centre for Agricultural Research, 2462 Martonvásár, Hungary., Lados BB; Department of Forestry Breeding, Forest Research Institute, University of Sopron, 9600 Sárvár, Hungary., Illés G; Department of Forest Management and Ecology, Forest Research Institute, University of Sopron, 9600 Sárvár, Hungary., Benke A; Department of Forestry Breeding, Forest Research Institute, University of Sopron, 9600 Sárvár, Hungary., Márialigeti K; Department of Microbiology, Eötvös Loránd University, 1117 Budapest, Hungary. |
| Abstrakt: |
Soil bacterial communities play a remarkable role in nutrient cycling, significantly affecting soil organic material content, soil fertility, and, in an indirect way, plant succession processes. Conversely, vegetation type influences microbial soil life. The present study compared the bacterial microbiome composition, diversity and catabolic activity profile of topsoil samples collected under three different forest types (a twice-coppiced black locust stand, a young, naturally reforested, and a middle-aged mixed pedunculate oak stand) planted on former arable land in the early 20th century. Diversity indices determined during 16S ribosomal RNA sequencing-based metagenome analysis indicated that the black locust stand had the highest soil bacterial community diversity. At the phylum level, Acidobacteriota, Actinobacteriota, Proteobacteria, Verrucomicrobiota, Bacteroidota, and Gemmatimonadota were the most abundant taxa in the forest soils. Concerning soil parameters, redundancy analysis revealed that pH had the highest impact on bacterial community structure and pH, and soil organic carbon content on the samples' respiration patterns. As for catabolic activity, the recently clearcut oak forest showed the lowest substrate-induced respiration, and citrate was the main driver for the inter-stand variability of microbial activity. Our results confirm that soil parameters and forest type influence the composition and functioning of the soil bacterial microbiome. |
