Effects of burning on vegetation, soil physicochemistry and prokaryotic microbial communities in surface and subsurface peat
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View abstract on PubMed
Summary
This summary is machine-generated.Prescribed burning impacts peatland prokaryotic communities, altering soil chemistry and community structure. Long-term burning regimes significantly affect archaeal and bacterial diversity and network complexity across soil depths.
Area Of Science
- Peatland ecology
- Soil microbiology
- Ecosystem management
Background
- Prescribed burning is a common peatland management practice.
- Its effects on soil prokaryotic communities across soil profiles are not fully understood.
- Peatlands are vital for biogeochemical cycles and ecosystem services.
Purpose Of The Study
- To investigate the impact of prescribed burning on prokaryotic community composition in peat soils.
- To analyze how different burning rotations (10-year vs. 20-year) and soil depth influence microbial diversity and structure.
- To identify key soil physicochemical factors shaping microbial communities under varying burn regimes.
Main Methods
- Soil sampling across three treatments: short rotation burn (10 years), long rotation burn (20 years), and non-burn control.
- Analysis of prokaryotic (archaea and bacteria) community composition and diversity.
- Measurement of soil physicochemical properties (pH, moisture, nutrients, metals).
- Co-occurrence network analysis to assess microbial community structure.
Main Results
- Species richness varied, with highest archaeal richness in non-burn topsoil and highest bacterial richness in non-burn and long-rotation topsoil.
- Prokaryotic community composition significantly differed between burn treatments and soil depths.
- Soil physicochemical factors like NH4+, pH, moisture, and metals strongly influenced archaeal and bacterial community structures.
- Non-burn topsoil showed more complex microbial networks; long-rotation profiles exhibited higher connectivity with more negative links.
Conclusions
- Prescribed burning significantly alters peatland prokaryotic communities, affecting diversity and structure across soil profiles.
- Soil chemistry and physical properties are key drivers of these microbial shifts.
- Findings provide crucial insights for managing peatland ecosystems and their services under fire regimes.
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