Professor Penny J Johnes

BSc, D.Phil (Oxon.)

  • BS8 1SS

    United Kingdom

  • BS8 1SS

1989 …2020

Research output per year

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Research Output

2013

Investigating catchment-scale hysteretic behaviour of nutrients at annual and individual storm time-resolutions.

Lloyd, C. E. M., Freer, J. E., Johnes, P. J. & Collins, A., 2013, Geophysical Research Abstracts. Vol. 15. p. EGU2013-12983

Research output: Chapter in Book/Report/Conference proceedingConference Contribution (Conference Proceeding)

Nitrogen speciation and phosphorus fractionation dynamics in a lowland chalk catchment

Yates, C. A. & Johnes, P. J., 1 Feb 2013, In : Science of The Total Environment. 444, p. 466-479 14 p.

Research output: Contribution to journalArticle (Academic Journal)

22 Citations (Scopus)

Using high-resolution water quality monitoring to investigate hysteretic behaviour of nutrients at catchment scale

Lloyd, C. E. M., Freer, J. E., Collins, A. & Johnes, P. J., Dec 2013.

Research output: Contribution to conferenceConference Poster

2012

A framework for analysing water quality observations to detect change in the context of natural variability and uncertainty

Lloyd, CEM., Freer, J. E., Johnes, P. J. & Collins, A., 2012, European Geophysical Union General Assembly, Vienna, Austria.

Research output: Chapter in Book/Report/Conference proceedingConference Contribution (Conference Proceeding)

Catchment phosphorous losses: an export coefficient modelling approach with scenario analysis for water management

Matias, N-G. & Johnes, P. J., 1 Mar 2012, In : Water Resources Management. 26, 5, p. 1041-1064 24 p.

Research output: Contribution to journalArticle (Academic Journal)

22 Citations (Scopus)

Nitrogen fluxes from the landscape are controlled by net anthropogenic nitrogen inputs and by climate

Howarth, R., Swaney, D., Billen, G., Garnier, J., Hong, B., Humborg, C., Johnes, P., Mörth, C-M. & Marino, R., 1 Feb 2012, In : Frontiers in Ecology and the Environment. 10, 1, p. 37-43 7 p.

Research output: Contribution to journalArticle (Academic Journal)

187 Citations (Scopus)

Phosphorus contributions from WwTW discharges to watercourses and their long term impacts relative to other sources

Comber, S., Crossman, J., Daldorph, P., Johnes, P. J., Kelly, M., Mistry, R., Robinson, S., Whitehead, P. & Yates, C. A., 2012, London: UK Water Industry Research Limited. 83 p.

Research output: Book/ReportOther report

2011

Developing integrated approaches to nitrogen management

Oenema, O., Salomez, J., Branquinho, C., Budnakova, M., Cermak, P., Geupel, P., Johnes, P., Tomkins, C., Spranger, T., Erisman, J. W., Pallìere, C., Maene, L., Alonso, R., Maas, R., Magid, J., Sutton, M. A. & Grinsven, H. V., 2011, European Nitrogen Assessment. Sutton, M. A., Howard, C. M., Erisman, J. W., Billen, G., Bleeker, A., Grennfelt, P., Grinsven, H. V. & Grizzetti, B. (eds.). UK: Cambridge University Press, p. 541-550 10 p.

Research output: Chapter in Book/Report/Conference proceedingOther chapter contribution

Integrating nitrogen fluxes at the European scale

Leip, A., Achermann, B., Billen, G., Bleeker, A., Bouwman, A., Vries, W. D., Dragosits, U., Doring, U., Fernall, D., Geupel, M., Herolstab, J., Johnes, P., Gall, A. C. L., Monni, S., Neveceral, R., Orlandini, L., Prud'homme, M., Reuter, H., Simpson, D., Seufert, G. & 5 others, Spranger, T., Sutton, M., Aardenne, J. V., Voss, M. & Winiwarter, W., 1 Apr 2011, The European Nitrogen Assessment. Sutton, M., Howard, C., Erisman, J. W., Billen, G., Bleeker, A., Greenfelt, P., Grinsven, H. V. & Grizzette, B. (eds.). Cambridge: Cambridge University Press, p. 345-376 32 p.

Research output: Chapter in Book/Report/Conference proceedingOther chapter contribution

Nitrogen as a threat to European water quality

Grizzetti, B., Bouraoui, F., Billen, G., Grinsven, H. V., Cardoso, A. C., Thieu, V., Garnier, J., Curtis, C., Howarth, R. W. & Johnes, P., 2011, European Nitrogen Assessment. Sutton, M. A., Howard, C. M., Erisman, J. W., Billen, G., Bleeker, A., Grennfelt, P., Grinsven, H. V. & Grizzetti, B. (eds.). UK: Cambridge University Press, p. 379-404 26 p.

Research output: Chapter in Book/Report/Conference proceedingOther chapter contribution

Nitrogen flows from European regional watersheds to coastal marine waters

Billen, G., Silvestre, M., Grizzetti, B., Leip, A., Bouraoui, F., Behrendt, H., Garnier, J., Humborg, C., Smedberg, E., Johnes, P., Kaste, O., Curtis, C., Lepisto, A., Kortelainen, P., Ganeshram, R., Beusen, A. & Voss, M., 2011, European Nitrogen Assessment. Sutton, M. A., Howard, C. M., Erisman, J. W., Billen, G., Bleeker, A., Grennfelt, P., Grinsven, H. V. & Grizzetti, B. (eds.). UK: Cambridge University Press, p. 271-297 27 p.

Research output: Chapter in Book/Report/Conference proceedingOther chapter contribution

Nitrogen processes in aquatic ecosystems

Durand, P., Breuer, L., Johnes, P. J., Billen, G., Butturini, A., Pinay, G., Grinsven, H. V., Garnier, J., Rivett, M., Reay, D. S., Curtis, C., Siemens, J., Maberly, S., Kaste, O., Humborg, C., Loeb, R., Klein, J. D., Hejzlar, J., Skoulikidis, N., Kortelainen, P. & 2 others, Lepisto, A. & Wright, R., 1 Apr 2011, European Nitrogen Assessment. Sutton, M. A., Howard, C. M., Erisman, J. W., Billen, G., Bleeker, A., Grennfelt, P., Grinsven, H. V. & Grizzetti, B. (eds.). Cambridge: Cambridge University Press, p. 126-146 21 p.

Research output: Chapter in Book/Report/Conference proceedingOther chapter contribution

2010

A pilot Virtual Observatory (pVO) for integrated catchment science – Demonstration of national scale modelling of hydrology and biogeochemistry

Freer, J. E., Bloomfield, J. P., Johnes, P. J., Macleod, C. J. A. & Reaney, S., 13 Dec 2010, American Geophysical Union Meeting, San Francisco, USA, 13-17th December, 2010. American Geophysical Union, H33A-1124

Research output: Chapter in Book/Report/Conference proceedingConference Contribution (Conference Proceeding)

2009

Bryozoan populations reflect nutrient enrichment and productivity gradients in rivers

Hartikainen, H., Johnes, P. J., Moncrieff, CB. & Okamura, B., 2009, In : Freshwater Biology. 54, 11, p. 2320-2334

Research output: Contribution to journalArticle (Academic Journal)

35 Citations (Scopus)

COST 869 - Mitigation options for nutrient reduction in surface water and groundwaters: Working Group 2: Ecological response to system manipulation

Istvanovics, V., Ekholm, P., Irvine, K., Johnes, P. J. & Chardon, W., 2009, Alterra. 45 p.

Research output: Book/ReportCommissioned report

Nutrient Imbalances: Pollution Remains Response

Vitousek, P. M., Naylor, R., Crews, T., David, M. B., Drinkwater, L. E., Holland, E., Johnes, P. J., Katzenberger, J., Martinelli, L. A., Matson, P. A., Nziguheba, G., Ojima, D., Palm, C. A., Robertson, G. P., Sanchez, P. A., Townsend, A. R. & Zhang, F. S., 2009, In : Science. 326, 5953, p. 665-666 2 p.

Research output: Contribution to journalArticle (Academic Journal)

Nutrient Imbalances in Agricultural Development

Vitousek, P. M., Naylor, R., Crews, T., David, M. B., Drinkwater, L. E., Holland, E., Johnes, P. J., Katzenberger, J., Martinelli, L. A., Matson, P. A., Nziguheba, G., Ojima, D., Palm, C. A., Robertson, G. P., Sanchez, P. A., Townsend, A. R. & Zhang, F. S., 2009, In : Science. 324, 5934, p. 1519-1520 2 p.

Research output: Contribution to journalArticle (Academic Journal)

728 Citations (Scopus)

Nutrient management for ecological benefit at Barton Broad and Bosherston Lily Pools, UK – achievements, costs and long term sustainability issues.

Johnes, P. J., 2009, Mitigation options for nutrient reduction in surface water and groundwaters: Ecological response to system manipulation. Istvanovics, V., Ekholm, P., Irvine, K., Johnes, P. J. & Chardon, W. (eds.). Netherlands: Alterra, p. 26

Research output: Chapter in Book/Report/Conference proceedingConference Contribution (Conference Proceeding)

2008

The role of the riparian zone in complex Chalk aquifer-stream systems

Gooddy, D., Binley, A., Bloomfield, J., Johnes, P. J., Peach, D., Shand, P. & Wheater, H., 2008, Geophysical Research Abstracts. Copernicus GmbH, Vol. 9.

Research output: Chapter in Book/Report/Conference proceedingConference Contribution (Conference Proceeding)

2007

Land use scenarios for England and Wales: evaluation of management options to support 'good ecological status' in surface freshwaters

Johnes, P. J., Foy, R., Butterfield, D. & Haygarth, P. M., 2007, In : Soil Use and Management. 23, Suppl 1, p. 176-196 21 p.

Research output: Contribution to journalArticle (Academic Journal)

53 Citations (Scopus)

Meeting ecological restoration targets in European waters: a challenge for animal agriculture

Johnes, P. J., 2007, Redesigning Animal Agriculture: the challenge for the 21st century. Swain, D., Charmley, E., Steel, J. & Coffey, S. (eds.). Wallingford: CABI Publishing, p. 185-203 19 p.

Research output: Chapter in Book/Report/Conference proceedingOther chapter contribution

11 Citations (Scopus)
214 Citations (Scopus)

Uncertainty of water-quality predictions in ungauged basins (PUBs)

Peters, N. E., Reynolds, B. & Johnes, P. J., 2007, In : International Association of Hydrological Sciences Publications. 309, p. 63-73 11 p.

Research output: Contribution to journalArticle (Academic Journal)

2006

Investigation into best practice for the design and management of successfully engineered wetland habitat systems on brownfield land

Wright, K. A. L., Johnes, P. J., Nisbet, T. & Sellers, G., 2006, Water and the landscape: The landscape ecology of freshwater ecosystems : proceedings of the fourteenth annual IALE (UK) conference held at Oxford Brookes University, September 2006. Davies, B. R. & Thompson, S. (eds.). Oxford: International Association of Landscape Ecology, p. 248-255 8 p.

Research output: Chapter in Book/Report/Conference proceedingOther chapter contribution

Water Framework Directive - WFD implementation in a European perspective. Report from a workshop at the Royal Swedish Academy of Agriculture and Forestry, 29 November 2005

Olsson, R., Rekolainen, S., Sjöberg, B., Reisner, R., Nielsen, K., Johnes, P. J. & Piegay, H., 2006, In : Kungl. Skogs-och Lantbruksakademiens Tidskrift. 8

Research output: Contribution to journalArticle (Academic Journal)

2005

A comparison of diatom phosphorus transfer functions and export coefficient models as tools for reconstructing lake nutrient histories

Bennion, H., Johnes, P., Ferrier, R., Phillips, G. & Haworth, E., 2005, In : Freshwater Biology. 50, 10, p. 1651-1670 20 p.

Research output: Contribution to journalArticle (Academic Journal)

47 Citations (Scopus)
2004

Nutrient monitoring, simulation and management within a major lowland UK river system: the Kennet

Wade, A. J., Whitehead, P., Jarvie, H. P., Neal, C., Prior, H. & Johnes, P. J., 2004, In : Mathematics and Computers in Simulation. 64, 3-4, p. 307-317 11 p.

Research output: Contribution to journalArticle (Academic Journal)

16 Citations (Scopus)

Physico-chemical controls on phosphorus cycling in two lowland streams. Part 1 - the water column

Evans, D. J. & Johnes, P., 2004, In : Science of The Total Environment. 329, 1-3, p. 145-163 19 p.

Research output: Contribution to journalArticle (Academic Journal)

49 Citations (Scopus)

Physico-chemical controls on phosphorus cycling in two lowland streams. Part 2 - The sediment phase

Evans, D. J., Johnes, P. J. & Lawrence, D. S., 2004, In : Science of The Total Environment. 329, 1-3, p. 165-182 18 p.

Research output: Contribution to journalArticle (Academic Journal)

79 Citations (Scopus)
2003

Effectiveness of eutrophication control by phosphorus reduction

Johnes, P. J., Whitehead, P., Davis, S., Wade, A. & Butterfield, D., 2003, Bristol: Environment Agency, (R D Technical Report).

Research output: Working paperWorking paper and Preprints

Fal and Helford Special Areas of Conservation (cSAC) and the Tamar Estuaries complex cSAC/Special Protection Area (pSPA): estimation of diffuse and point-source nutrient inputs

Fraser, A., Butterfield, D., Uncles, R., Johnes, P. J. & Harrod, T. R., 2003, Site Characterisation of the South West European Marine Sites: Fal and Helford cSAC. Langston, W. J., Chesman, B. S., Burt, G. R., Hawkins, S. J., Readman, J. & Worsfold, P. (eds.). Plymouth, Devon, UK: Marine Biological Association of the United Kingdom, Vol. Occasional Publication 8. 160 p. (Occasional Publication of the Marine Biological Association).

Research output: Chapter in Book/Report/Conference proceedingChapter in a book

Land use for achieving ‘good ecological status’ of waterbodies in England and Wales: a theoretical exploration for nitrogen and phosphorus

Haygarth, P. M., Johnes, P. J., Butterfield, D., Foy, R. & Withers, P. J., 2003, HMSO. 30 p.

Research output: Book/ReportCommissioned report

Suspended and bed load sediment transport dynamics in two lowland UK streams--storm integrated monitoring

Evans, D., Johnes, P. & Lawrence, D., 2003, In : International Association of Hydrological Sciences Publications. 283, p. 103-110 8 p.

Research output: Contribution to journalArticle (Academic Journal)

9 Citations (Scopus)

The Phosphorus Indicators Tool: a simple model of diffuse P loss from agricultural land to water

Heathwaite, A. L., Fraser, A. I., Johnes, P. J., Hutchins, M., Lord, E. & Butterfield, D., 2003, In : Soil Use and Management. 19, 1, p. 1-11 11 p.

Research output: Contribution to journalArticle (Academic Journal)

100 Citations (Scopus)
2002

A comparison of methods for estimating the riverine export of nitrogen from large watersheds

Alexander, R. B., Johnes, P. J., Boyer, E. W. & Smith, R. A., 2002, The Nitrogen Cycle at Regional to Global Scales. Boyer, E. W. & Howarth, R. W. (eds.). Springer, Dordrecht, p. 295-339

Research output: Chapter in Book/Report/Conference proceedingChapter in a book

A comparison of models for estimating the riverine export of nitrogen from large watersheds

Alexander, R. B., Johnes, P. J., Boyer, E. W. & Smith, R. A., 2002, In : Biogeochemistry. 57/58, 1, p. 295-339 45 p.

Research output: Contribution to journalArticle (Academic Journal)

136 Citations (Scopus)

Landscape, regional and global estimates of N flux from land to ocean: errors and uncertainties

Johnes, P. J. & Butterfield, D., 2002, The Nitrogen Cycle at Regional to Global Scales. Boyer, E. W. & Howarth, R. W. (eds.). Springer, Dordrecht, p. 429-476

Research output: Chapter in Book/Report/Conference proceedingChapter in a book

Landscape, regional and global estimates of nitrogen flux from land to sea: errors and uncertainties

Johnes, P. J. & Butterfield, D., 2002, In : Biogeochemistry. 57-58, 1, p. 429-476 48 p.

Research output: Contribution to journalArticle (Academic Journal)

38 Citations (Scopus)

Phosphorus and Sediment Yield Characterization In Catchments (psychic)

Withers, P. J., Quinton, J., Heathwaite, A., Johnes, P. J., Walling, D. E. & Jarvie, H., 2002, Geophysical Research Abstracts. Copernicus GmbH, p. 1287

Research output: Chapter in Book/Report/Conference proceedingConference Contribution (Conference Proceeding)

51 Citations (Scopus)

Steady state and dynamic modelling of nitrogen in the River Kennet: impacts of land use change since the 1930s

Whitehead, P. G., Johnes, P. J. & Butterfield, D., 2002, In : Science of The Total Environment. 282-283, p. 417-434 18 p.

Research output: Contribution to journalArticle (Academic Journal)

69 Citations (Scopus)

The prediction of nutrients into estuaries and their subsequent behaviour: application to the Tamar and comparison with the Tweed, U.K.

Uncles, R. J., Fraser, A. I., Butterfield, D., Johnes, P. & Harrod, T. R., 2002, In : Hydrobiologia. 475-476, 1, p. 239-250 12 p.

Research output: Contribution to journalArticle (Academic Journal)

15 Citations (Scopus)
2000

Assessing nutrient inputs and their impact in catchments, UK

Phillips, G. L. & Johnes, P. J., 2000, Implementing the Water Framework Directive: A seminar series on water. Jones, T. (ed.). Brussels: World Wide Fund for Nature, p. 39-44

Research output: Chapter in Book/Report/Conference proceedingConference Contribution (Conference Proceeding)

Quantification of National P Loss from Agriculture to Water.

Johnes, P., Fraser, A., Harrod, T., Butterfield, D. & Withers, P., 2000, In : Environment News. 1, 1, p. 2-3 2 p.

Research output: Contribution to journalArticle (Academic Journal)

Understanding lake and catchment history as a tool for integrated lake management

Johnes, P. J., 2000, The Ecological Bases for Lake and Reservoir Management: Developments in Hydrobiology. Harper, D. M., Brierley, W., Ferguson, A. J. D. & Phillips, G. L. (eds.). Kluwer Academic Publishers, Vol. 136. p. 41-60

Research output: Chapter in Book/Report/Conference proceedingChapter in a book

1999

Understanding lake and catchment history as a tool for integrated lake management

Johnes, P., 1999, In : Hydrobiologia. 395/396, p. 41-60 20 p.

Research output: Contribution to journalArticle (Academic Journal)

27 Citations (Scopus)
1998

Phosphorus loss from agricultural catchments: pathways and implications for management

Johnes, P. J. & Hodgkinson, R., 1998, In : Soil Use and Management. 14, p. 175-185

Research output: Contribution to journalArticle (Academic Journal)

44 Citations (Scopus)

Trial Classification of Lake Water Quality in England and Wales: R&D Technical Report E54

Johnes, P. J., Butterfield, D., Whitehead, P., Moss, B., Bennion, H. B., Curtis, C. & Patrick, S., 1998, Environment Agency.

Research output: Book/ReportCommissioned report