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

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)

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)

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)

A geospatial framework to support integrated biogeochemical modelling in the United Kingdom

Greene, S., Johnes, P. J., Bloomfield, J., Reaney, S., Lawley, R., Elkhatib, Y., Freer, J. E., Odoni, N. A., Macleod, C. J. A. & Percy, B., Jun 2015, In : Environmental Modelling and Software. 68, p. 219-232 14 p.

Research output: Contribution to journalArticle (Academic Journal)

Open Access
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19 Citations (Scopus)
476 Downloads (Pure)

An exploration of individual, social and material factors influencing water pollution mitigation behaviours within the farming community

Inman, A., Winter, M., Wheeler, R., Vrain, E., Lovett, A., Collins, A., Jones, I., Johnes, P. & Cleasby, W., Jan 2018, In : Land Use Policy. 70, p. 16-26 11 p.

Research output: Contribution to journalArticle (Academic Journal)

Open Access
File
17 Citations (Scopus)
267 Downloads (Pure)

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)

A procedure for the digestion of natural water samples for determination of total N and total P concentrations in freshwaters

Johnes, P. J. & Heathwaite, A., 1993, Chemical analysis of natural waters in environmental research : a collection of papers presented at an International Conference on Chemical Analysis of Natural Waters in Environmental Research: analytical solutions of current problems, held at the Institute Terrestrial Ecology, Merlewood Research Station, Grange-over-Sands, Cumbria, UK, September 1991: Science of the Total Environment. Cape, J., Hilton, J., Kennedy, V. H. & Rowland, A. (eds.). 1-3 ed. Vol. 135.

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

A procedure for the simultaneous determination of total nitrogen and total phosphorus in freshwater samples using persulphate microwave digestion

Johnes, P. & Heathwaite, A. L., 1992, In : Water Research. 26, 10, p. 1281-1287 7 p.

Research output: Contribution to journalArticle (Academic Journal)

112 Citations (Scopus)

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)

Assessing the drivers of dissolved organic matter export from two contrasting lowland catchments, U.K

Yates, C., Johnes, P. & Spencer, R., 1 Nov 2016, In : Science of The Total Environment. 569–570, p. 1330-1340 11 p.

Research output: Contribution to journalArticle (Academic Journal)

Open Access
File
13 Citations (Scopus)
729 Downloads (Pure)

Assessing the effects of sampling design on water quality status classification

Lloyd, C. E. M., Freer, J. E., Johnes, P. J. & Collins, A., 2013, Geophysical Research Abstracts. Vol. 15. p. EGU2013-13032

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

Auguste Thienemann and Loch Lomond - an approach to the design of a system for monitoring the state of north-temperate standing waters.

Moss, B., Johnes, P. J. & Phillips, G., 1994, Developments in Hydrobiology, 101, p. 1-12.

Research output: Contribution to specialist publicationArticle (Specialist Publication)

August Thienemann and Loch Lomond - an approach to the design of a system for monitoring the state of north-temperate standing waters

Moss, B., Johnes, P. & Phillips, G., 1994, In : Hydrobiologia. 290, p. 1-12 12 p.

Research output: Contribution to journalArticle (Academic Journal)

7 Citations (Scopus)

Benchmarking the predictive capability of hydrological models for river flow and flood peak predictions across over 1000 catchments in Great Britain

Lane, R., Coxon, G., Freer, J., Wagener, T., Johnes, P., Bloomfield, J., Greene, S., Macleod, C. & Reaney, S., 30 Sep 2019, In : Hydrology and Earth System Sciences. 23, p. 4011–4032 22 p.

Research output: Contribution to journalArticle (Academic Journal)

Open Access
File
5 Citations (Scopus)
158 Downloads (Pure)

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)

Cascading multiscale watershed effects on differential carbon isotopic characteristics and associated hydrological processes

Gao, Y., Jia, J., Lu, Y., Zhou, F., Hao, Z., Johnes, P. J., Dungait, J. A. J. & Shi, K., 1 Sep 2020, In : Journal of Hydrology. 588, 11 p., 125139.

Research output: Contribution to journalArticle (Academic Journal)

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)

Catchment Science in the C21st: challenges, future directions and research needs.

Demonstration Test Catchments Team & Environmental Virtual Observatory Team, 2013, AGU Fall Meeting Abstracts. American Geophysical Union

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

Characterisation of treated effluent from four commonly employed wastewater treatment facilities: A UK case study

Yates, C. A., Johnes, P. J. & Spencer, R. G. M., 15 Feb 2019, In : Journal of Environmental Management. 232, p. 919-927 9 p.

Research output: Contribution to journalArticle (Academic Journal)

Open Access
File
5 Citations (Scopus)
93 Downloads (Pure)

Contribution of N Species and P Fractions to Stream Water Quality in Agricultural Catchments

Heathwaite, A. L. & Johnes, P., 1996, In : Hydrological Processes. 10, 7, p. 971-983 13 p.

Research output: Contribution to journalArticle (Academic Journal)

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

Determination of the nature and origins of riverine phosphorus in catchments underlain by Upper Greensand

Mouchos, E., Johnes, P., Buss, H. & Gooddy, D., Jun 2016.

Research output: Contribution to conferenceConference Abstract

Determining the impact of riparian wetlands on nutrient cycling, storage and export in permeable agricultural catchments

Johnes, P. J., Gooddy, D., Heaton, T. H. E., Binley, A., Kennedy, M. P., Shand, P. & Prior, H., 6 Jan 2020, In : Water. 12, 1, w12010167.

Research output: Contribution to journalArticle (Academic Journal)

Open Access
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127 Downloads (Pure)

Determining the sources of nutrient flux to water in headwater catchments: Examining the speciation balance to inform the targeting of mitigation measures

Lloyd, C., Johnes, P., Freer, J., Carswell, A., Jones, J. I., Stirling, M. W., Hodgkinson, R. A., Richmond, C. & Collins, A. L., 15 Jan 2019, In : Science of The Total Environment. 648, p. 1179-1200 22 p.

Research output: Contribution to journalArticle (Academic Journal)

Open Access
File
6 Citations (Scopus)
317 Downloads (Pure)

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

Discharge and nutrient uncertainty: Implications for nutrient flux estimation in small streams.

Lloyd, C., Freer, J., Johnes, P., Coxon, G. & Collins, A., 20 Dec 2015, In : Hydrological Processes. 30, 1, p. 135–152 18 p.

Research output: Contribution to journalArticle (Academic Journal)

Open Access
File
30 Citations (Scopus)
366 Downloads (Pure)

Dissolved organic nutrient uptake by riverine phytoplankton varies along a gradient of nutrient enrichment

Mackay, E. B., Feuchtmayr, H., De Ville, M. M., Thackeray, S. J., Callaghan, N., Marshall, M., Rhodes, G., Yates, C. A., Johnes, P. J. & Maberly, S. C., 8 Mar 2020, (Accepted/In press) In : Science of The Total Environment. 722, STOTEN 137837.

Research output: Contribution to journalArticle (Academic Journal)

Open Access
File
34 Downloads (Pure)

Distributed and dynamic modelling of hydrology, phosphorus and ecology in the Hampshire Avon and Blashford Lakes: Evaluating alternative strategies to meet WFD standards

Whitehead, P., Jin, L., Crossman, J., Comber, S., Johnes, P. J., Daldorph, P., Flynn, N., Collins, A., Butterfield, D., Mistri, R., Bardon, R., Pope, L. & Willows, R., 2014, In : Science of The Total Environment. 481, p. 157-166 10.1016/j.scitotenv.2014.02.007.

Research output: Contribution to journalArticle (Academic Journal)

14 Citations (Scopus)

Ecology and management of wetlands

Hughes, J. M. R. & Johnes, P. J., 1995, The Hydrology and Hydrochemistry of British Wetlands. Hughes, J. M. R. & Heathwaite, A. L. (eds.). John Wiley & Sons, Ltd., p. 317-323

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

Ecosystem service delivery in Karst landscapes: anthropogenic perturbation and recovery

Quine, T., Guo, D., Green, S. M., Tu, C., Hartley, I., Zhang, X., Dungait, J., Wen, X., Song, Z., Liu, H., Buss, H., Barrows, T., Evershed, R., Johnes, P. & Meersmans, J., 1 Sep 2017, In : Acta Geochimica. 36, 3, p. 416-420 5 p.

Research output: Contribution to journalArticle (Academic Journal)

Open Access
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9 Citations (Scopus)
267 Downloads (Pure)

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

Environmental Virtual Observatory: Final Report

Emmett, B., Gurney, R., McDonald, A., Blair, G., Buytaert, W., Freer, J. E., Haygarth, P., Johnes, P. J., Rees, G., Tetzlaff, D., E, A., Ball, L., Beven, K., M, B., J, B., Brewer, P., J, D., Elkhatib, Y., Field, D., A, G. & 17 others, Greene, S., Huntingford, C., Mackay, EH., Macklin, M., MacLeod, K., Marshall, KE., Odoni, N., Percy, B., Quinn, P., Reaney, S., M., S., B, S., Thomas, N., C, V., Williams, B., Wilkinson, M. & P, Z., 2014, NE/I002200/1 ed. Natural Environment Research Council. 78 p.

Research output: Book/ReportCommissioned report

Open Access
File
121 Downloads (Pure)

Experimental precipitation of hydroxyapatite (HAP)

Williams, M., Buss, H., Mouchos, E. & Johnes, P., Mar 2017.

Research output: Contribution to conferenceConference Poster

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

Ground penetrating radar as a tool to improve heritage management of wetlands

Bunting, C., Branch, N., Steve, R. & Johnes, P., Jul 2014, 15th International Conference on Ground Penetrating Radar (GPR), June 30 - July 4, 2014, Brussels,. Institute of Electrical and Electronics Engineers (IEEE), p. 54-59 6 p. doi: 10.1109/ICGPR.2014.6970384

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

Heads in the cloud: innovation in data and model dissemination

Emmett, B., Gurney, R., McDonald, A., Ball, L., M, B., Blair, G., Bloomfield, J., Buytaert, W., J, D., Elkhatib, Y., Freer, J. E., A, G., Greene, S., Haygarth, P., Huntingford, C., Johnes, P. J., Mackay, EH., Macklin, M., MacLeod, K., Odoni, N. A. & 12 others, Percy, B., Quinn, P., Reaney, S., Rees, G., M., S., B, S., Tetzlaff, D., Thomas, N., C, V., Wilkinson, M., Williams, B. & P, Z., Aug 2014, International Innovation, 141, p. 82-85 4 p.

Research output: Contribution to specialist publicationArticle (Specialist Publication)

Open Access
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102 Downloads (Pure)

High-frequency monitoring of nitrogen and phosphorus response in three rural catchments to the end of the 2011-2012 drought in England

Outram, F. N., Lloyd, C. E. M., Jonczyk, J., McW. H. Benskin, C., Grant, F., Perks, M. T., Deasy, C., Burke, S. P., Collins, A. L., Freer, J., Haygarth, P. M., Hiscock, K. M., Johnes, P. J. & Lovett, A. L., 8 Sep 2014, In : Hydrology and Earth System Sciences. 18, 9, p. 3429-3448 20 p.

Research output: Contribution to journalArticle (Academic Journal)

67 Citations (Scopus)

High resolution HPLC-MS confirms overestimation of urea in soil by the diacetyl monoxime (DAM)colorimetric method

Reay, M., Yates, C., Johnes, P., Arthur, C., Jones, D. & Evershed, R., 1 Aug 2019, In : Soil Biology and Biochemistry. 135, p. 127-133 7 p.

Research output: Contribution to journalArticle (Academic Journal)

Open Access
File
58 Downloads (Pure)

High-resolution monitoring of catchment nutrient response to the end of the 2011–2012 drought in England, captured by the demonstration test catchments

Outram, F., Lloyd, C. E. M., Jonczyk, J., Benskin, C. M., Grant, F., Dorling, S. R., Steele, C., Collins, A. L., Freer, J. E., Haygarth, P. M., Hiscock, K., Johnes, P. J. & Lovett, A. A., 11 Dec 2013, In : Hydrology and Earth System Sciences Discussions. 10, 12, p. 15119-15165 47 p.

Research output: Contribution to journalArticle (Academic Journal)

Hydrological controls on DOC : nitrate resource stoichiometry in a lowland, agricultural catchment, southern UK

Heppell, C. M., Binley, A., Trimmer, M., Darch, T., Jones, A., Malone, E., Collins, A., Johnes, P., Freer, J. & Lloyd, C., 27 Sep 2017, In : Hydrology and Earth System Sciences. 21, p. 4785-4802 18 p.

Research output: Contribution to journalArticle (Academic Journal)

Open Access
File
12 Citations (Scopus)
257 Downloads (Pure)

Hydrological processes in the Slapton catchments and their relationship to sediment and solutes losses

Burt, T. P., Johnes, P. J., Heathwaite, A., Trudgill, S. T., O'Sullivan, P. E. & Chell, K., 1990, In : Proceedings of the Hydrological Research Basins & Environment Conference. TNO 44, p. 295-302

Research output: Contribution to journalArticle (Academic Journal)

Identifying the main drivers of change of phytoplankton community structure and gross primary productivity in a river-lake system

Jia, J., Gao, Y., Zhou, F., Shi, K., Johnes, P. J., Dungait, J. A. J., Ma, M. & Lu, Y., 1 Apr 2020, In : Journal of Hydrology. 583, 13 p., 124633.

Research output: Contribution to journalArticle (Academic Journal)

1 Downloads (Pure)

Impact of microbial activity on the leaching of soluble N forms in soil

Carswell, A., Hill, P. W., Jones, D. L., Blackwell, M. S. A., Johnes, P., Dixon, E. & Chadwick, D., 1 Jan 2018, In : Biological Fertility of Soils. 54, 1, p. 21-25 5 p.

Research output: Contribution to journalArticle (Academic Journal)

Open Access
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2 Citations (Scopus)
247 Downloads (Pure)

Improving lake water quality in Slapton Ley National Nature Reserve, S. Devon, UK - amelioration by wetlands or catchment source management

Trudgill, S. T., Burt, T. P., Johnes, P. J. & Heathwaite, A. L., 1997, In : International Association of Hydrological Sciences Publications. 243, p. 299-312

Research output: Contribution to journalArticle (Academic Journal)

Integrating geophysics and geoarchaeology for a heritage management toolkit in wetlands: Shapwick Heath case study.

Bunting, C., Branch, N., Robinson, S., Johnes, P. J. & Jones, L., 2013, Archaeological Prospection : Proceedings of the 10th International Conference - Vienna May 29th - June 2nd 2013. Neubauer, W., Trinks, I., Salisbury, R. B. & Einwögerer, C. (eds.). Vienna: Austrian Academy of Sciences Press, Vienna, p. 215 217 p.

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

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