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

Article (Academic Journal)

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 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 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 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 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)

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)

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)

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
File
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)

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)

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
File
9 Citations (Scopus)
267 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)

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)

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)

Major agricultural changes required to mitigate phosphorus losses under climate change

Mary, O., Holloway, M. J., Beven, K., Collins, A., Evans, R., Falloon, P. D., Forber, K. J., Hiscock, K., Kahana, R., Macleod, C. J. A., Tych, W., Villamizar, M. L., Wearing, C., Withers, P. J., Zhou, J. G., Barker, P. A., Burke, S., Freer, J., Johnes, P., Snell, M. & 2 others, Surridge, B. & Haygarth, P., 31 Jul 2017, In : Nature Communications. 8, 9 p., 161.

Research output: Contribution to journalArticle (Academic Journal)

Open Access
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37 Citations (Scopus)
252 Downloads (Pure)

Managing Water Quality in Agricultural Catchments

Burt, T. P. & Johnes, P. J., 1997, In : Transactions of the Institute of British Geographers. 22, p. 61-68 8 p.

Research output: Contribution to journalArticle (Academic Journal)

25 Citations (Scopus)

Methods for detecting change in hydrochemical time series in response to targeted pollutant mitigation in river catchments.

Lloyd, C. E. M., Freer, J. E., Johnes, P. J., Collins, A. & Jones, I., 2014, In : Journal of Hydrology. 514, p. 297–312

Research output: Contribution to journalArticle (Academic Journal)

27 Citations (Scopus)

Microbial uptake kinetics of dissolved organic carbon (DOC) compound groups from river water and sediments

Brailsford, F. L., Glanville, H. C., Golyshin, P. N., Johnes, P. J., Yates, C. A. & Jones, D. L., 2 Aug 2019, In : Scientific Reports. 9, 11 p., 11229.

Research output: Contribution to journalArticle (Academic Journal)

Open Access
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4 Citations (Scopus)
88 Downloads (Pure)

Microbial use of low molecular weight DOM in filtered and unfiltered freshwater: Role of ultra-small microorganisms and implications for water quality monitoring

Brailsford, F. L., Glanville, H. C., Marshall, M. R., Golyshin, P. N., Johnes, P. J., Yates, C. A., Owen, A. T. & Jones, D. L., 15 Nov 2017, In : Science of The Total Environment. 598, p. 377-384 8 p.

Research output: Contribution to journalArticle (Academic Journal)

Open Access
File
9 Citations (Scopus)
194 Downloads (Pure)

Modelling the impact of land use change on water quality in agricultural catchments

Johnes, P. & Heathwaite, A. L., 1997, In : Hydrological Processes. 11, 3, p. 269-286 18 p.

Research output: Contribution to journalArticle (Academic Journal)

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)

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)

Nutrient enrichment induces a shift in dissolved organic carbon (DOC) metabolism in oligotrophic freshwater sediments.

Brailsford, F. L., Glanville, H. C., Golyshin, P. N., Marshall, M. R., Lloyd, C. E., Johnes, P. J. & Jones, D. L., 10 Nov 2019, In : Science of The Total Environment. 690, p. 1131-1139 9 p.

Research output: Contribution to journalArticle (Academic Journal)

Open Access
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5 Citations (Scopus)
10 Downloads (Pure)

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 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)

Organic phosphorus in the terrestrial environment: a perspective on the state of the art and future priorities

George, T. S., Giles, C. D., Menezes-Blackburn, D., Condron, L. M., Gama-Rodrigues, A. C., Jaisi, D., Lang, F., Neal, A. L., Stutter, M. I., Almeida, D. S., Bol, R., Cabugao, K. G., Celi, L., Cotner, J. B., Feng, G., Goll, D. S., Hallama, M., Krueger, J., Plassard, C., Rosling, A. & 66 others, Darch, T., Fraser, T., Giesler, R., Richardson, A. E., Tamburini, F., Shand, C. A., Lumsdon, D. G., Zhang, H., Blackwell, M. S. A., Wearing, C., Mezeli, M. M., Almås, R., Audette, Y., Bertrand, I., Beyhaut, E., Boitt, G., Bradshaw, N., Brearley, C. A., Bruulsema, T. W., Ciais, P., Cozzolino, V., Duran, P. C., Mora, M. L., de Menezes, A. B., Dodd, R. J., Dunfield, K., Engl, C., Frazão, J. J., Garland, G., González Jiménez, J. L., Graca, J., Granger, S. J., Harrison, A. F., Heuck, C., Hou, E. Q., Johnes, P. J., Kaiser, K., Kjær, H. A., Klumpp, E., Lamb, A. L., Macintosh, K. A., Mackay, E. B., McGrath, J., McIntyre, C., McLaren, T., Mészáros, E., Missong, A., Mooshammer, M., Negrón, C. P., Nelson, L. A., Pfahler, V., Poblete-Grant, P., Randall, M., Seguel, A., Seth, K., Smith, A. C., Smits, M. M., Sobarzo, J. A., Spohn, M., Tawaraya, K., Tibbett, M., Voroney, P., Wallander, H., Wang, L., Wasaki, J. & Haygarth, P. M., 6 Oct 2017, In : Plant and Soil. 18 p.

Research output: Contribution to journalArticle (Academic Journal)

Open Access
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49 Citations (Scopus)
301 Downloads (Pure)

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)

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)

Projected impacts of increased uptake of source control mitigation measures on agricultural diffuse pollution emissions to water and air

Zhang, Y., Collins, A. L., Johnes, P. J. & Jones, J. I., Mar 2017, In : Land Use Policy. 62, p. 185-201 17 p.

Research output: Contribution to journalArticle (Academic Journal)

Open Access
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11 Citations (Scopus)
339 Downloads (Pure)

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)