Summary
This field study demonstrates that elevated atmospheric ammonia concentrations alter soil enzyme activity and microbial biomass dynamics in oak forest ecosystems, suggesting that atmospheric nitrogen pollution acts as a stressor on belowground microbial communities. The findings indicate measurable effects on soil biological processes beyond direct fertilisation inputs, with implications for forest soil health and nutrient cycling function. The research contributes to understanding how air pollution impacts critical soil-based ecosystem services in temperate forest systems.
UK applicability
These findings are relevant to UK broadleaf and mixed woodlands, particularly where atmospheric ammonia deposition from intensive livestock farming or industrial sources is elevated. The results may inform soil health assessment and woodland management practices where nitrogen pollution is a concern.
Key measures
Soil microbial biomass (C and N), enzyme activity (phosphatase, dehydrogenase), atmospheric ammonia concentration, microbial community composition
Outcomes reported
The study measured soil microbial biomass carbon and nitrogen, and enzyme activities (including phosphatase and dehydrogenase) in response to elevated atmospheric ammonia concentrations. Changes in microbial community structure and functional responses to ammonia deposition were quantified in oak forest soils.
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