John A. Lee
University of Sheffield
7 Papers
John A. Lee is an academic researcher from University of Sheffield. The author has contributed to research in topics: Lessivage & Leaching (agriculture). The author has an hindex of 7, co-authored 7 publications.
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Papers
Simulated pollutant nitrogen deposition increases P demand and enhances root‐surface phosphatase activities of three plant functional types in a calcareous grassland
Gareth K. Phoenix,Rosemary E. Booth,Jonathan R. Leake,David Read,J. Philip Grime,John A. Lee +5 more
TL;DR: Long-term N enrichment of calcareous grassland stimulates root-surface PME in representatives of the three major higher-plant functional types, and PME response to P additions was greatest in least mycorrhizal-dependant species with roots more adapted for direct P uptake.
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Effects of global change on a sub-Arctic heath: effects of enhanced UV-B radiation and increased summer precipitation.
Gareth K. Phoenix,Dylan Gwynn-Jones,Dylan Gwynn-Jones,Terry V. Callaghan,Terry V. Callaghan,Darren Sleep,John A. Lee +6 more
TL;DR: Phoenix et al. as discussed by the authors studied the effects of global change on a sub-Arctic heath: effects of enhanced UV-B radiation and increased summer precipitation, and found that UV radiation and summer precipitation were positively correlated.
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Arctic microorganisms respond more to elevated UV-B radiation than CO2
David W. Johnson,Colin Campbell,John A. Lee,Terry V. Callaghan,Terry V. Callaghan,Dylan Gwynn-Jones +5 more
TL;DR: It is shown that 5 years of exposure of a subarctic heath to enhanced UV-B radiation both alone and in combination with elevated CO2 resulted in significant changes in the C:N ratio and in the bacterial community structure of the soil microbial biomass.
Effects of increased deposition of atmospheric nitrogen on an upland moor: leaching of N species and soil solution chemistry.
Michael G. Pilkington,Simon J.M. Caporn,Jacqueline A. Carroll,N. Cresswell,John A. Lee,T.W. Ashenden,S. A. Brittain,Brian Reynolds,Bridget A. Emmett +8 more
TL;DR: Investigation of the leaching response of an upland moorland to long-term ammonium nitrate additions showed increases in nitrate leaching only in response to high rates of N input, and litter C:N ratios were significantly lowered but values remained above a threshold predicted to increase leaching of N in forests.
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Impacts of burning and increased nitrogen deposition on nitrogen pools and leaching in an upland moor
Michael G. Pilkington,Simon J.M. Caporn,Jacqueline A. Carroll,N. Cresswell,Gareth K. Phoenix,John A. Lee,Bridget A. Emmett,Tim H. Sparks +7 more
TL;DR: In this article, a management burn was applied to an upland Calluna vulgaris moor which contained a set of long-term experimental plots treated with simulated increased atmospheric nitrogen (N) deposition at rates of +0, +40, +80 and +120 kg ha−1 year−1.
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