Professor Jonathan Grey Professor in Practice with the Wild Trout Trust

Reader (in Practice)

Research Overview

Jonathan has spent the last 20 years applying various stable isotope approaches to answer ecological questions, primarily in aquatic ecosystems. He has two main threads to his research: the role of methane-derived carbon fuelling freshwater food webs, and assessing the direct and indirect effects of invasive non-native species (crayfish and amphipods in particular) within recipient ecosystems.

As Professor in Practice with The Wild Trout Trust, Jonathan will be developing future research to tackle issues (e.g. connectivity, habitat degradation / restoration, stocking) affecting the iconic sentinel species, the brown trout (Salmo trutta).

Terrestrial support of lake food webs: synthesis reveals controls over cross-ecosystem resource use
Tanentzap, A.J., Kielstra, B.W., Wilkinson, G.M., Berggren, M., Craig, N., del Giorgio, P.A., Grey, J., Gunn, J.M., Jones, S.E., Karlsson, J., Solomon, C.T., Pace, M.L. 22/03/2017 In: Science Advances. 3, 3, 10 p.
Journal article

Novel and disrupted trophic links following invasion in freshwater ecosystems
Jackson, M.C., Wasserman, R.J., Grey, J., Ricciardi, A., Dick, J.T.A., Alexander, M.E. 17/03/2017 In: Networks of invasion. Elsevier p. 55-97. 43 p.
Chapter

Invasive crayfish impacts on native fish diet and growth vary with fish life stage
Wood, K.A., Hayes, R.B., England, J., Grey, J. 01/2017 In: Aquatic Sciences - Research Across Boundaries . 79, 1, p. 113-125. 13 p.
Journal article

No such thing as a free meal: organotin transfer across the freshwater-terrestrial interface
Laws, J., Heppell, K., Sheahan, D., Liu, C., Grey, J. 12/2016 In: Freshwater Biology. 61, 12, p. 2051-2062. 12 p.
Journal article

Dietary niche constriction when invaders meet natives: evidence from freshwater decapods
Jackson, M.C., Grey, J., Miller, K., Britton, J.R., Donohue, I. 06/2016 In: Journal of Animal Ecology. 85, 4, p. 1098-1107. 10 p.
Journal article

The incredible lightness of being methane-fuelled: stable isotopes reveal alternative energy pathways in aquatic ecosystems and beyond
Grey, J. 11/02/2016 In: Frontiers in Ecology and Evolution. 4, 14 p.
Journal article

Riverbed methanotrophy sustained by high carbon conversion efficiency
Trimmer, M., Shelley, F.C., Purdy, K.J., Maanoja, S.T., Chronopoulou, P., Grey, J. 9/06/2015 In: ISME Journal. 9, 10, p. 2304-2314. 11 p.
Journal article

Angling baits and invasive crayfish as important trophic subsidies for a large cyprinid fish
Bašić, T., Britton, J.R., Jackson, M.C., Reading, P., Grey, J. 01/2015 In: Aquatic Sciences - Research Across Boundaries . 77, 1, p. 153-160. 8 p.
Journal article

Microbial methane cycling in the bed of a chalk-river: oxidation has the potential to match warming enhanced Methanogenesis
Shelley, F.C., Abdullahi, F., Grey, J., Trimmer, M. 01/2015 In: Freshwater Biology. 60, 1, p. 150-160. 11 p.
Journal article

Niche differentiation among invasive crayfish and their impacts on ecosystem structure and functioning
Jackson, M.C., Jones, T., Milligan, M., Sheath, D., Taylor, J., Ellis, A., England, J., Grey, J. 06/2014 In: Freshwater Biology. 59, 6, p. 1123-1135. 13 p.
Journal article

Widespread methanotrophic primary production in lowland chalk rivers
Shelley, F.C., Grey, J., Trimmer, M. 05/2014 In: Proceedings of the Royal Society B: Biological Sciences. 281, 1783, 8 p.
Journal article

Invasive crayfish as drivers of fine sediment dynamics in rivers: field and laboratory evidence
Harvey, G.L., Henshaw, A.J., Moorhouse, T.P., Clifford, N.J., Holah, H., Grey, J., Macdonald, D.W. 02/2014 In: Earth Surface Processes and Landforms. 39, 2, p. 259-271. 13 p.
Journal article

Review on processes and effects of nutrients and organic material in lakes and threats due to climate change on current adaptive management and restoration efforts
Thackeray, S., Mackay, E., Jones, I., Jeppesen, E., Järvinen, M., Nieminen, M., Grey, J. 2014 Seventh Framework Programme. 53 p.
Commissioned report

Bayesian stable isotope mixing models
Parnell, A.C., Phillips, D.L., Bearhop, S., Semmens, B.X., Ward, E.J., Moore, J.W., Jackson, A.L., Grey, J., Kelly, D.J., Inger, R. 09/2013 In: Environmetrics. 24, 6, p. 387-399. 13 p.
Journal article

Accelerating rates of freshwater invasions in the catchment of the River Thames
Jackson, M.C., Grey, J. 2013 In: Biological Invasions. 15, 5, p. 945-951. 7 p.
Journal article

‘House and garden’: larval galleries enhance resource availability for a sedentary caddisfly
Ings, N.L., Hildrew, A.G., Grey, J. 12/2012 In: Freshwater Biology. 57, 12, p. 2526-2538. 13 p.
Journal article

River bed carbon and nitrogen cycling: state of play and some new directions
Trimmer, M., Grey, J., Heppell, C., Hildrew, A.G., Lansdown, K., Stahl, H., Yvon-Durocher, G. 15/09/2012 In: Science of the Total Environment. 434, p. 143-158. 16 p.
Journal article

Dissolved carbon dioxide concentration controls baseline stable carbon isotope signatures of a lake food web
Smyntek, P.M., Maberly, S.C., Grey, J. 09/2012 In: Limnology and Oceanography. 57, 5, p. 1292-1302. 11 p.
Journal article

'Leaves and eats shoots': direct terrestrial feeding can supplement invasive red swamp crayfish in times of need
Grey, J., Jackson, M.C. 3/08/2012 In: PLoS ONE. 7, 8, 6 p.
Journal article

Warming alters community size structure and ecosystem functioning
Dossena, M., Yvon-Durocher, G., Grey, J., Montoya, J.M., Perkins, D.M., Trimmer, M., Woodward, G. 08/2012 In: Proceedings of the Royal Society B: Biological Sciences. 279, 1740, p. 3011-3019. 9 p.
Journal article

Population-level metrics of trophic structure derived from stable isotopes and their application to invasion ecology
Jackson, M.C., Donohue, I., Jackson, A.L., Britton, J.R., Harper, D., Grey, J. 21/02/2012 In: PLoS ONE. 7, 2, 12 p.
Journal article

High site fidelity and low site connectivity in temperate salt marsh fish populations: a stable isotope approach
Green, B.C., Smith, D.J., Grey, J., Underwood, G.J.C. 01/2012 In: Oecologia. 168, 1, p. 245-255. 11 p.
Journal article

Temporal variation in zebra mussel (Dreissena polymorpha ) density structure the benthic food web and community composition on hard substrates in Lake Constance, Germany
Gergs, R., Grey, J., Rothhaupt, K. 12/2011 In: Biological Invasions. 13, 12, p. 2727-2738. 12 p.
Journal article

A review of allodiversity in Lake Naivasha, Kenya: developing conservation actions to protect East African lakes from the negative impacts of alien species
Gherardi, F., Britton, J.R., Mavuti, K.M., Pacini, N., Grey, J., Tricarico, E., Harper, D. 11/2011 In: Biological Conservation. 144, 11, p. 2585-2596. 12 p.
Journal article

Determining the strength of exploitative competition from an introduced fish: roles of density, biomass and body size
Britton, J.R., Cucherousset, J., Grey, J., Gozlan, R.E. 03/2011 In: Ecology of Freshwater Fish. 20, 1, p. 74-79. 6 p.
Journal article

Biogenic methane in freshwater food webs
Jones, R., Grey, J. 2011 In: Freshwater Biology. 56, 2, p. 213-229. 17 p.
Journal article

Biomonitoring of human impacts in freshwater ecosystems: the good, the bad and the ugly
Friberg, N., Bonada, N., Bradley, D.C., Dunbar, M.J., Edwards, F.K., Grey, J., Hayes, R.B., Hildrew, A.G., Lamouroux, N., Trimmer, M., Woodward, G. 2011 In: Advances in Ecological Research. 44, p. 1-68. 68 p.
Journal article

The introduced Micropterus salmoides in an equatorial lake: a paradoxical loser in an invasion meltdown scenario?
Britton, J.R., Harper, D., Oyugi, D.O., Grey, J. 10/2010 In: Biological Invasions. 12, 10, p. 3439-3448. 10 p.
Journal article

Biological influences on inter- and intraspecific isotopic variability among paired chondrostome fishes
Durbec, M., Thea, B.N., Grey, J., Harrod, C., Stolzenberg, N., Chappaz, R., Cavalli, L. 08/2010 In: Comptes Rendus Biologies. 333, 8, p. 613-621. 9 p.
Journal article

Laboratory measures of isotope discrimination factors: comments on Caut, Angulo and Courchamp (2008, 2009)
Perga, M., Grey, J. 08/2010 In: Journal of Applied Ecology. 47, 4, p. 942-947. 6 p.
Journal article

Gardening by the psychomyiid caddisfly Tinodes waeneri: evidence from stable isotopes
Ings, N.L., Hildrew, A.G., Grey, J. 05/2010 In: Oecologia. 163, 1, p. 127-139. 13 p.
Journal article

Back to the future: using palaeolimnology to infer long-term temporal changes in shallow lake food webs
Rawcliffe, R., Sayer, C.D., Woodward, G., Grey, J., Davidson, T.A., Jones, J.I. 03/2010 In: Freshwater Biology. 55, 3, p. 600-613. 14 p.
Journal article

Potential carbon fixation via methane oxidation in well-oxygenated river bed gravels
Trimmer, M., Maanoja, S.T., Hildrew, A.G., Pretty, J.L., Grey, J. 03/2010 In: Limnology and Oceanography. 55, 2, p. 560-568. 9 p.
Journal article

The use of stable isotopes to trace small-scale movements by small fish species
Durbec, M., Cavalli, L., Grey, J., Chappaz, R., Nguyen The, B. 03/2010 In: Hydrobiologia. 641, 1, p. 23-31. 9 p.
Journal article

A trophic pathway from biogenic methane supports fish biomass in a temperate lake ecosystem
Ravinet, M., Syväranta, J., Jones, R.I., Grey, J. 02/2010 In: Oikos. 119, 2, p. 409-416. 8 p.
Journal article

Fossil chironomid δ13 C as a proxy for past methanogenic contribution to benthic food webs in lakes?
van Hardenbroek, M., Heiri, O., Grey, J., Bodelier, P.L.E., Verbruggen, F., Lotter, A.F. 02/2010 In: Journal of Paleolimnology. 43, 2, p. 235-245. 11 p.
Journal article

Unravelling complexities in benthic food webs using a dual stable isotope (hydrogen and carbon) approach
Deines, P., Wooller, M.J., Grey, J. 11/2009 In: Freshwater Biology. 54, 11, p. 2243-2251. 9 p.
Journal article

Trade-off between morphological convergence and opportunistic diet behavior in fish hybrid zone
Corse, E., Costedoat, C., Pech, N., Chappaz, R., Grey, J., Gilles, A. 10/2009 In: Frontiers in Zoology. 6, 1, 14 p.
Journal article

Altered complementary feeding strategies of the consumers Hydrobia ulvae and Idotea emarginata via passive selectivity
Aberle, N., Malzahn, A.M., Grey, J., Hillebrand, H., Wiltshire, K.H. 09/2009 In: Helgoland Marine Research. 63, 3, p. 189-197. 9 p.
Journal article

Evidence for the role of methane-derived carbon in a free-flowing, lowland river food web
Trimmer, M., Hildrew, A.G., Jackson, M.C., Pretty, J.L., Grey, J. 09/2009 In: Limnology and Oceanography. 54, 5, p. 1541-1547. 7 p.
Journal article

Stable isotope analysis of archived roach (Rutilus rutilus) scales for retrospective study of shallow lake responses to nutrient reduction
Grey, J., Graham, C.T., Britton, J.R., Harrod, C. 08/2009 In: Freshwater Biology. 54, 8, p. 1663-1670. 8 p.
Journal article

Status, ecology and conservation of an endemic fish, Oreochromis niloticus baringoensis, in Lake Baringo, Kenya
Britton, J.R., Jackson, M., Muchiri, M., Tarras-Wahlberg, H., Harper, D., Grey, J. 07/2009 In: Aquatic Conservation: Marine and Freshwater Ecosystems. 19, 5, p. 487-496. 10 p.
Journal article

Widespread contribution of methane-cycle bacteria to the diets of profundal lake chironomid larvae
Jones, R.I., Carter, C.E., Kelly, A., Ward, S., Kelly, D.J., Grey, J. 03/2008 In: Ecology. 89, 3, p. 857-864. 8 p.
Journal article

From introduction to fishery dominance: the initial impacts of the invasive carp Cyprinus carpio in Lake Naivasha, Kenya, 1999 to 2006
Britton, J.R., Boar, R.R., Grey, J., Foster, J., Lugonzo, J., Harper, D. 12/12/2007 In: Journal of Fish Biology. 71, supp, p. 239-257. 19 p.
Journal article

Lipid extraction has little effect on the δ15N of aquatic consumers
Ingram, T., Matthews, B., Harrod, C., Stephens, T., Grey, J., Markel, R., Mazumder, A. 10/2007 In: Limnology and Oceanography. 5, 10, p. 338-342. 5 p.
Journal article

Linking larval chironomids to methane: seasonal variation of the microbial methane cycle and chironomid δ13C
Deines, P., Grey, J., Richnow, H., Eller, G. 2007 In: Aquatic Microbial Ecology. 46, p. 273-282. 10 p.
Journal article

Experimental d13C evidence for a contribution of methane to pelagic food webs in lakes
Kankaala, P., Taipale, S., Grey, J., Sonninen, E., Arvola, L., Jones, R. 11/2006 In: Limnology and Oceanography. 51, 6, p. 2821-2827. 7 p.
Journal article

A revised model for lipid-normalizing δ 13 C values from aquatic organisms, with implications for isotope mixing models
Kiljunen, M., Grey, J., Sinisalo, T., Harrod, C., Immonen, H., Jones, R. 12/09/2006 In: Journal of Applied Ecology. 43, 6, p. 1213-1222. 10 p.
Journal article

Food niches of cyclopoid copepods in eutrophic Plußsee determined by stable isotope analysis
Santer, B., Sommerwerk, N., Grey, J. 1/09/2006 In: Archiv für Hydrobiologie. 167, 1-4, p. 301-316. 16 p.
Journal article

Site-specific methane production and subsequent midge mediation within Esthwaite Water, UK
Deines, P., Grey, J. 1/09/2006 In: Archiv für Hydrobiologie. 167, 1-4, p. 317-334. 18 p.
Journal article

Isotopic variation complicates analysis of trophic relations within the fish community of Plußsee: a small, deep, stratifying lake
Harrod, C., Grey, J. 09/2006 In: Archiv für Hydrobiologie. 167, 1-4, p. 281-299. 19 p.
Journal article

Determination of zooplankton dietary shift following a zebra mussel invasion, as indicated by stable isotope analysis
Maguire, C.M., Grey, J. 07/2006 In: Freshwater Biology. 51, 7, p. 1310-1319. 10 p.
Journal article

The contribution of trophic position to mercury content of pike (Esox lucius) in small boreal lakes
Syväranta, J., Grey, J., Jones, R., Rask, M., Salonen, M. 03/2006 In: Verhandlungen der Internationalen Vereinigung für Theoretische und Angewandte Limnologie. 29, p. 1757-1761. 5 p.
Journal article

Utilisation of dissolved organic carbon from different sources by pelagic bacteria in an acidic mining lake
Kamjunke, N., Bohn, C., Grey, J. 03/2006 In: Archiv für Hydrobiologie. 165, 3, p. 355-364. 10 p.
Journal article

Organic inclusions in lacustrine diatom frustules as a host for carbon and nitrogen isotopes
King, L., Barker, P.A., Grey, J. 2006 In: International Association of Theoretical and Applied Limnology, Vol 29, Pt 3, Proceedings. E. Schweizerbart p. 1608-1610. 3 p. ISBN: 3-510-54067-0, 978-3-510-54067-9.
Chapter

The use of stable isotope analyses in freshwater ecology: current awareness
Grey, J. 2006 In: Polish Journal of Ecology. 54, 4, p. 563-584. 22 p.
Journal article

Methane cycling in lake sediments and its influence on chironomid larval δ13C
Eller, G., Deines, P., Grey, J., Richnow, H., Krüger, M. 1/11/2005 In: FEMS Microbiology Ecology. 54, 3, p. 339-350. 12 p.
Journal article

Stable isotope analyses provide new insights into ecological plasticity in a mixohaline population of European eel
Harrod, C., Grey, J., McCarthy, T.K., Morrissey, M. 08/2005 In: Oecologia. 144, 4, p. 673-683. 11 p.
Journal article

Differential assimilation of methanotrophic and chemoautotrophic bacteria by lake chironomid larvae
Grey, J., Deines, P. 18/07/2005 In: Aquatic Microbial Ecology. 40, 1, p. 61-66. 6 p.
Journal article

Selectivity and competitive interactions between two benthic invertebrate grazers (Asellus aquaticus and Potamopyrgus antipodarum): an experimental study using 13C- and 15N-labelled diatoms
Aberle, N., Hillebrand, H., Grey, J., Wiltshire, K.H. 02/2005 In: Freshwater Biology. 50, 2, p. 369-379. 11 p.
Journal article

Zooplankton interactions in an enclosure experiment: insights from stable isotope analyses
Feuchtmayr, H., Zöllner, E., Santer, B., Sommer, U., Grey, J. 11/2004 In: Freshwater Biology. 49, 11, p. 1495-1504. 10 p.
Journal article

The utility of carbon and nitrogen isotope analyses to trace contributions from fish farms to the receiving communities of freshwater lakes: a pilot study in Esthwaite Water, UK
Grey, J., Waldron, S., Hutchinson, R. 08/2004 In: Hydrobiologia. 524, 1, p. 253-262. 10 p.
Journal article

High intraspecific variability in carbon and nitrogen stable isotope ratios of lake chironomid larvae
Grey, J., Kelly, A., Jones, R. 01/2004 In: Limnology and Oceanography. 49, 1, p. 239-244. 6 p.
Journal article

Seasonal variability in the gut ultrastructure of the parasitic copepod Neoergasilus japonicus (Copepoda, Poecilostomatoida)
Baud, A., Cuoc, C., Grey, J., Chappaz, R., Alekseeva, V. 2004 In: Canadian Journal of Zoology. 82, 10, p. 1655-1666. 12 p.
Journal article

Stable isotope analyses of chironomid larvae from some Finnish forest lakes indicates dietary contribution from biogenic methane
Jones, R., Grey, J. 2004 In: Boreal Environment Research. 9, 1, p. 17-23. 7 p.
Journal article

Stable isotope analysis provides fresh insights into dietary separation between Chironomus anthracinus and C. plumosus
Kelly, A., Jones, R., Grey, J. 2004 In: Journal of the North American Benthological Society. 23, 2, p. 287-296. 10 p.
Journal article

Effect of preparation and preservation procedures on carbon and nitrogen stable isotope determinations from zooplankton
Feuchtmayr, H., Grey, J. 15/12/2003 In: Rapid Communications in Mass Spectrometry. 17, 23, p. 2605-2610. 6 p.
Journal article

Exploitation of a deep-water algal maximum by Daphnia: a stable-isotope tracer study
Lampert, W., Grey, J. 2003 In: Developments in Hydrobiology. Dordrecht : Springer p. 95-101. 7 p. ISBN: 9789401037853. Electronic ISBN: 9789400710849.
Chapter

Ferox Trout (Salmo trutta) as `Russian dolls': complementary gut content and stable isotope analyses of the Loch Ness foodweb
Grey, J., Thackeray, S.J., Jones, R., Shine, A. 07/2002 In: Freshwater Biology. 47, 7, p. 1235-1243. 9 p.
Journal article

A chironomid conundrum: queries arising from stable isotopes
Grey, J. 2002 In: Verhandlungen der Internationalen Vereinigung für Theoretische und Angewandte Limnologie. 28, 1, p. 102-105. 4 p.
Journal article

Using stable isotope analyses to identify allochthonous inputs to Lake Naivasha mediated via the hippopotamus gut
Grey, J., Harper, D. 2002 In: Isotopes in Environmental and Health Studies. 38, 4, p. 245-250. 6 p.
Journal article

Sources and fluxes of inorganic carbon in a deep, oligotrophic lake (Loch Ness, Scotland)
Jones, R., Grey, J., Quarmby, C., Sleep, D. 12/2001 In: Global Biogeochemical Cycles. 15, 4, p. 863-870. 8 p.
Journal article

Ontogeny and dietary specialization in brown trout (Salmo trutta L.) from Loch Ness, Scotland, examined using stable isotopes of carbon and nitrogen
Grey, J. 09/2001 In: Ecology of Freshwater Fish. 10, 3, p. 168-176. 9 p.
Journal article

Seasonal changes in the importance of the source of organic matter to the diet of zooplankton in Loch Ness, as indicated by stable isotope analysis
Grey, J., Jones, R., Sleep, D. 05/2001 In: Limnology and Oceanography. 46, 3, p. 505-513. 9 p.
Journal article

Stable isotope analysis of the origins of zooplankton carbon in lakes of differing trophic state.
Grey, J., Jones, R.I., Sleep, D. 05/2000 In: Oecologia. 123, 2, p. 232-240. 9 p.
Journal article

Trophic fractionation and the effects of diet switch on the carbon stable isotopic signatures of pelagic consumers
Grey, J. 2000 In: Verhandlungen der Internationalen Vereinigung für Theoretische und Angewandte Limnologie. 27, p. 3187-3191. 5 p.
Journal article

Carbon stable isotopes reveal complex trophic interactions in lake plankton
Grey, J., Jones, R.I. 15/07/1999 In: Rapid Communications in Mass Spectrometry. 13, 13, p. 1311-1314. 4 p.
Journal article

Stable isotope analysis of zooplankton carbon nutrition in humic lakes.
Jones, R.I., Grey, J., Sleep, D., Arvola, L. 07/1999 In: Oikos. 86, 1, p. 97-104. 8 p.
Journal article

An assessment, using stable isotopes, of the importance of allochthonous organic carbon sources to the pelagic food web in Loch Ness
Jones, R., Grey, J., Sleep, D., Quarmby, C. 01/1998 In: Proceedings of the Royal Society B: Biological Sciences. 265, 1391, p. 105-111. 7 p.
Journal article

Temporal patterns of protozooplankton abundance and their food in Ellis Fjord, Princess Elizabeth Land, Eastern Antarctica
Grey, J., Laybourn-Parry, J., Leakey, R.J.G., McMinn, A. 07/1997 In: Estuarine, Coastal and Shelf Science. 45, 1, p. 17-25. 9 p.
Journal article

Microbial dynamics in coastal waters of East Antarctica: bacterial production and nanoflagellate bacterivory
Leakey, R.J.G., Archer, S.D., Grey, J. 1996 In: Marine Ecology Progress Series. 142, 1, p. 3-17. 15 p.
Journal article