Bacteria but not fungi respond to soil acidification rapidly and consistently in both a spruce and beech forest
| Autor: | Michal Růžek, Jiří Bárta, Filip Oulehle, Karolina Tahovská, Eva Kaštovská, Michal Choma |
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| Rok vydání: | 2020 |
| Předmět: |
0301 basic medicine
Nitrogen Soil acidification Ammonium nitrate Forests Applied Microbiology and Biotechnology Microbiology Actinobacteria 03 medical and health sciences chemistry.chemical_compound Soil Forest ecology Fagus Beech Soil Microbiology Ecology biology Bacteria Norway Fungi Soil chemistry 04 agricultural and veterinary sciences Hydrogen-Ion Concentration biology.organism_classification 030104 developmental biology chemistry Environmental chemistry 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Species richness Acidobacteria |
| Zdroj: | FEMS microbiology ecology. 96(10) |
| ISSN: | 1574-6941 |
| Popis: | Anthropogenically enhanced atmospheric sulphur (S) and nitrogen (N) deposition has acidified and eutrophied forest ecosystems worldwide. However, both S and N mechanisms have an impact on microbial communities and the consequences for microbially driven soil functioning differ. We conducted a two-forest stand (Norway spruce and European beech) field experiment involving acidification (sulphuric acid addition) and N (ammonium nitrate) loading and their combination. For 4 years, we monitored separate responses of soil microbial communities to the treatments and investigated the relationship to changes in the activity of extracellular enzymes. We observed that acidification selected for acidotolerant and oligotrophic taxa of Acidobacteria and Actinobacteria decreased bacterial community richness and diversity in both stands in parallel, disregarding their original dissimilarities in soil chemistry and composition of microbial communities. The shifts in bacterial community influenced the stoichiometry and magnitude of enzymatic activity. The bacterial response to experimental N addition was much weaker, likely due to historically enhanced N availability. Fungi were not influenced by any treatment during 4-year manipulation. We suggest that in the onset of acidification when fungi remain irresponsive, bacterial reaction might govern the changes in soil enzymatic activity. |
| Databáze: | OpenAIRE |
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