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Penny Johnes
Penny Johnes
Professor of Biogeochemistry
Adresse e-mail validée de bristol.ac.uk - Page d'accueil
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Nutrient imbalances in agricultural development
PM Vitousek, R Naylor, T Crews, MB David, LE Drinkwater, E Holland, ...
Science 324 (5934), 1519-1520, 2009
16692009
The European nitrogen assessment: sources, effects and policy perspectives
MA Sutton, CM Howard, JW Erisman, G Billen, A Bleeker, P Grennfelt, ...
Cambridge university press, 2011
13852011
Evaluation and management of the impact of land use change on the nitrogen and phosphorus load delivered to surface waters: the export coefficient modelling approach
PJ Johnes
Journal of hydrology 183 (3-4), 323-349, 1996
10901996
Uncertainties in annual riverine phosphorus load estimation: Impact of load estimation methodology, sampling frequency, baseflow index and catchment population density
PJ Johnes
Journal of Hydrology 332 (1-2), 241-258, 2007
3732007
Nitrogen fluxes from the landscape are controlled by net anthropogenic nitrogen inputs and by climate
R Howarth, D Swaney, G Billen, J Garnier, B Hong, C Humborg, P Johnes, ...
Frontiers in Ecology and the Environment 10 (1), 37-43, 2012
3612012
Using hysteresis analysis of high-resolution water quality monitoring data, including uncertainty, to infer controls on nutrient and sediment transfer in catchments
CEM Lloyd, JE Freer, PJ Johnes, AL Collins
Science of the total environment 543, 388-404, 2016
3572016
Nitrate: processes, patterns and management.
TP Burt, AL Heathwaite, ST Trudgill
3341993
Modelling the impact of land use change on water quality in agricultural catchments
PJ Johnes, AL Heathwaite
Hydrological processes 11 (3), 269-286, 1997
2851997
Trends in nutrients
AL Heathwaite, PJ Johnes, NE Peters
Hydrological processes 10 (2), 263-293, 1996
2531996
A comparison of models for estimating the riverine export of nitrogen from large watersheds
RB Alexander, PJ Johnes, EW Boyer, RA Smith
Biogeochemistry 57, 295-339, 2002
2372002
The determination of total nitrogen and total phosphorus concentrations in freshwaters from land use, stock headage and population data: testing of a model for use in …
P Johnes, B Moss, G Phillips
Freshwater Biology 36 (2), 451-473, 1996
236*1996
Nitrogen as a threat to European water quality
B Grizzetti, F Bouraoui, G Billen, H van Grinsven, AC Cardoso, V Thieu, ...
Cambridge University Press, 2011
2312011
Organic phosphorus in the terrestrial environment: a perspective on the state of the art and future priorities
TS George, CD Giles, D Menezes-Blackburn, LM Condron, ...
Plant and Soil 427, 191-208, 2018
2302018
Contribution of nitrogen species and phosphorus fractions to stream water quality in agricultural catchments
AL Heathwaite, PJ Johnes
Hydrological processes 10 (7), 971-983, 1996
2281996
Major agricultural changes required to mitigate phosphorus losses under climate change
MC Ockenden, MJ Hollaway, KJ Beven, AL Collins, R Evans, PD Falloon, ...
Nature Communications 8 (1), 161, 2017
1942017
Nitrogen processes in aquatic ecosystems
P Durand, L Breuer, PJ Johnes, G Billen, A Butturini, G Pinay, ...
Cambridge University Press, 2011
191*2011
Integrating nitrogen fluxes at the European scale
A Leip, B Achermann, G Billen, A Bleeker, A Bouwman, W de Vries, ...
Cambridge University Press, 2011
1802011
Testing an improved index for analysing storm discharge–concentration hysteresis
CEM Lloyd, JE Freer, PJ Johnes, AL Collins
Hydrology and Earth System Sciences 20 (2), 625-632, 2016
1772016
A procedure for the simultaneous determination of total nitrogen and total phosphorus in freshwater samples using persulphate microwave digestion
PJ Johnes, AL Heathwaite
Water Research 26 (10), 1281-1287, 1992
1771992
The Phosphorus Indicators Tool: a simple model of diffuse P loss from agricultural land to water
AL Heathwaite, AI Fraser, PJ Johnes, M Hutchins, E Lord, D Butterfield
Soil Use and Management 19 (1), 1-11, 2003
1532003
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