Below is a list of my research publications covering papers in peer-reviewed journals and book chapters. See my institution web site for details of project reports and other publications, and if you are interested, see my Google Scholar profile.

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  1. Barr, C., Tibby, J., Leng, M.J., Tyler, J.J., Henderson, A.C.G., Overpeck, J.T., Simpson, G.L., Cole, J.E., Phipps, S.J., Marshall, J.C., McGregor, G.B., Hua, Q., & McRobie, F.H. (submitted) Asian monsoon influences on ENSO and related east-Australian rainfall variability over the last 7700 years.

  2. Hayes, N.M., Haig, H.A., Simpson, G.L., & Leavitt, P.R. (in review) Seasonal and interannual evidence that environmental change increases the magnitude, duration, and risk of exposure to the cyanobacterial toxin microcystin. Limnology & Oceanography Letters.

  3. Wiik, E., Haig, H.A., Hayes, N.M., Finlay, K., Simpson, G.L., Vogt, R.J., & Leavitt, P.R. (in revision) Generalized additive models of climatic and metabolic controls of sub-annual variation in pCO2 in productive hardwater lakes. Journal of Geophysical Research: Biogeoscience.

  4. Beck, K.K., Fletcher, M-S., Gadd, P.S., Heijnis, H., Saunders, K.M., Simpson, G.L., & Zawadzki, A. (accepted) Variance and rate-of-change as early warning signals for a critical transition in an aquatic ecosystem state: a test case from Tasmania, Australia. Journal of Geophysical Research: Biogeosciences.

  5. Anderson, N.J., Curtis, C.J., Whiteford, E. J., Jones, V.J., McGowan, S., Simpson, G.L., & Kaiser, J. (in revision) Regional variability in the atmospheric nitrogen deposition signal and its transfer to the sediment record in Greenland lakes. Limnology & Oceanography.

  6. Hayes, N.M., Patoine, A., Haig, H.A., Simpson, G.L., Swarbrick, V.J., Wiik, E., & Leavitt, P.R. (in revision) Spatial and temporal variation in the importance of net nitrogen fixation to phytoplankton growth in productive hardwater lakes. Limnology & Oceanography.

  7. Jacobsen, M.C., Lett, K. Simpson, G.L., Barden, J., & Buttigieg, J. (submitted). Targeting of the large-conductance, voltage and Ca2+-activated K+ (BK) channel in acute spinal cord injury is neuroprotective. Journal of Spinal Cord Medicine.

  8. Jacobsen, M.C., Manunta, M., Pincott, E., Fenton, M., Simpson, G.L., Klein, N. & Burch, M. (accepted) Specific Immunity to Cytomegalovirus in Paediatric Cardiac Transplantation. Transplantation.

  9. Curtis, C.J., Kaiser, J., Marca, A., Anderson, N.J., Simpson, G.L., Jones, V.J., & Whiteford, E. (accepted) Spatial variations in snowpack chemistry and isotopic composition of NO3- along a nitrogen deposition gradient in West Greenland. Biogeosciences.

  10. Bogard, M.J., Finlay, K., Waiser, M.J., Tumber, V.P., Donald, D.B., Wiik, E., Simpson, G.L., del Giorgio, P.A., & Leavitt, P.R. (2017) Effects of experimental nitrogen fertilization on planktonic metabolism and CO2 flux in a hypereutrophic hardwater lake. PLoS ONE 12(12): e0188652.

  11. Mushet, G.R., Laird, K.R., Das, B., Hesjedal, B., Leavitt, P.R., Scott, K.A., Simpson G.L., Wissel, B., Wolfe, J., & Cumming B.F. (in press). Regional climate changes drive increased scaled-chrysophyte abundance in lakes downwind of Athabasca Oil Sands nitrogen emissions Journal of Paleolimnology 53(3), 419–435.

  12. Laird, K.L., Das, B., Hesjedal, B., Leavitt, P.R., Mushet, G.R., Scott, K.A., Simpson, G.L., Wissel, B., Wolfe, J., & Cumming, B.F. (in press) Paleolimnological assessment of nutrient enrichment on diatom assemblages in a priori defined nitrogen- and phosphorus-limited lakes lakes downwind of the Athabasca Oil Sands, Canada. Journal of Limnology, 76(3) 488–502.

  13. Eberts, R.L., Wissel, B., Simpson, G.L., Crawford, S.S., Stott, W., Hanner, R.H., Manzon, R.G., Wilson, J.Y., Boreham, D.R., & Somers, C.M. (2017) Isotopic structure of Lake Whitefish in Lake Huron: evidence for regional and local populations based on resource use. North American Journal of Fisheries Management 37(1): 133–148.

  14. Bunting, L., Leavitt, P.R., Simpson, G.L., Wissel, B., Laird, K.R., Cumming, B.F., St. Amand, A., & Engstrom, D.R. (2016) Increased variability and sudden ecosystem state change in Lake Winnipeg, Canada, caused by 20th century agriculture. Limnology & Oceanography 61(6); 2090–2107.

  15. Woolway, R.I., Jones, I.D., Maberly, S.C., French, J.R., Livingstone, D.M., Monteith, D.T., Simpson, G.L., Thackeray, S.J., Andersen, M.R., Battarbee, R.W., DeGasperi, C.L., Evans, C.D., de Eyto, E., Feuchtmayr, H., Hamilton, D.P., Kernan, M., Krokowski, J, Rimmer, A., Rose, K.C., Rusak, J.A., Ryves, D.B., Scott, D.R., Shilland, E.M., Smyth, R.L., Staehr, P.A., Thomas, R., Waldron, S., & Weyhenmeyer, G.A. (2016) Diel surface temperature range scales globally with lake size. PLoS One 11(3): e0152466

  16. Bennion, H., Simpson, G.L., & Goldsmith, B.J. (2015) Assessing degradation and recovery pathways in lakes impacted by eutrophication using the sediment record Frontiers in Ecology & Evolution 3:94

  17. Wiik, E., Bennion, H., Sayer, C.D., Davidson, T.A., Clarke S.J., McGowan, S., Prentice, S. Simpson, G.L., & Stone, L. (2015) The coming and going of a marl lake: multi-indicator palaeolimnology reveals abrupt ecological change and alternative views of reference conditions Frontiers in Ecology & Evolution 3:82

  18. Bennion, H., Davidson, T.A., Sayer, C.D., Simpson, G.L., Rose, N.L., & Sadler, J.P. (2015) Harnessing the potential of the multi-indicator palaeoecological approach: an assessment of the nature and causes of ecological change in a eutrophic shallow lake. Freshwater Biology 60(7), 1423–1442.

  19. Goring, S., Dawson, A., Simpson, G.L., Ram, K., Graham, R.W., Grimm, E.C., & Williams, J.W. (2015). neotoma: A Programmatic Interface to the Neotoma Paleoecological Database. Open Quaternary 1, Art. 2., 1–17.

  20. Finlay, K., Vogt, R.J., Bogard, M.J., Wissel, B., Tutolo, B.M., Simpson, G.L., & Leavitt, P.R. (2015) Decrease in CO2 efflux from northern hardwater lakes with increasing atmospheric warming. Nature 519, 215–218.

  21. Juggins, S., Simpson, G.L., Telford, R.J. (2015) Taxon selection using statistical learning techniques to improve transfer function prediction. The Holocene 25(1), 130–136.

  22. Orr, H.G., Simpson, G.L., des Clers, S., Watts, G., Hughes, M., Hannaford, J., Dunbar, M.J., Laizé, C.L.R., Wilby, R.L., Battarbee, R.W., Evans, R. (2015) Detecting changing river temperatures in England and Wales. Hydrological Processes 59(3), 752–766.

  23. Curtis, C.J., Simpson, G.L., Battarbee, R.W., & Maberley S. (2014) Challenges in Defining Critical Loads for Nitrogen in UK Lakes. In Sutton, M.A., Mason, K.E., Sheppard, L.J., Sverdrup, H., Haeuber, R., & Hicks, W.K. (Eds) Nitrogen Deposition, Critical Loads and Biodiversity. Springer, Dordrecht.

  24. Baron, J.S. & 38 others (2014) The Effects of Atmospheric Nitrogen Deposition on Terrestrial and Freshwater Biodiversity. In Sutton, M.A., Mason, K.E., Sheppard, L.J., Sverdrup, H., Haeuber, R., & Hicks, W.K. (Eds) Nitrogen Deposition, Critical Loads and Biodiversity. Springer, Dordrecht.

  25. Seddon, A., Mackay, A., Baker, A., and 66 others (2014) Looking forward through the past. Identification of fifty priority research questions in palaeoecology. Journal of Ecology 102(1), 256–267.

  26. Birks, H.J.B., & Simpson, G.L. (2013) ‘Diatoms and pH reconstruction’ (1990) revisited. Journal of Paleolimnology 49(3), 361–371.

  27. Battarbee, R.W., Simpson, G.L., Shilland, E.M., Flower, R.J., Kreiser, A., Yang, H., & Clarke, G. (2014) Recovery of UK lakes from acidification: An assessment using combined palaeoecological and contemporary diatom assemblage data. Ecological Indicators 37(B), 365–380.

  28. Murphy, J.F., Winterbottom, J.H., Ortona, S., Simpson, G.L., Shilland, E.M., & Hildrew, A.G. (2014) Evidence of recovery from acidification in the macroinvertebrate assemblages of UK fresh waters: a 20–year time series. Ecological Indicators 37(B), 330–340.

  29. Monteith, D.T., Evans, C.D., Henrys, P., Simpson, G.L., & Malcolm, I.A. (2014) Trends in the hydro-chemistry of acid-sensitive surface waters in the UK 1988–2008. Ecological Indicators 37(B), 287–303.

  30. Curtis, C.J. & Simpson, G.L. (2014) Trends in bulk deposition of acidity in the UK, 1988–2007, assessed using additive models. Ecological Indicators 37(B), 274–286.

  31. Reuss, N.S., Anderson, N.J., Fritz, S.C., & Simpson, G.L. (2013) Responses of microbial phototrophs to late-Holocene environmental forcing of lakes in south-west Greenland. Freshwater Biology 58(4), 690–704.

  32. Battarbee, R.W., Anderson, N.J., Bennion, H., & Simpson, G.L. (2012) Combining limnological and palaeolimnological data to disentangle the effects of nutrient pollution and climate change on lake ecosystems: problems and potential. Freshwater Biology 57(10), 2091–2106.

  33. Simpson, G.L. & Birks H.J.B. (2012) Statistical Learning in Palaeolimnology. In Birks, H.J.B, Lotter, A.F. Juggins S., and Smol, J.P. (Eds) Tracking Environmental Change Using Lake Sediments, Volume 5: Data Handling and Numerical Techniques. Springer, Dordrecht.

  34. Simpson, G.L. (2012) Analogue methods in palaeolimnology. In Birks, H.J.B, Lotter, A.F. Juggins S., and Smol, J.P. (Eds) Tracking Environmental Change Using Lake Sediments, Volume 5: Data Handling and Numerical Techniques. Springer, Dordrecht.

  35. Simpson, G.L. & Hall R.I. (2012) Human impacts: applications of numerical methods to evaluate surface water acidification and eutrophication. In Birks, H.J.B, Lotter, A.F. Juggins S., and Smol, J.P. (Eds) Tracking Environmental Change Using Lake Sediments, Volume 5: Data Handling and Numerical Techniques. Springer, Dordrecht.

  36. Curtis, C.J., Heaton, T.H.E., Simpson, G.L., Evans, C.D., Shilland, J., & Turner, S.D. (2012) Dominance of biologically produced nitrate in upland waters of Great Britain indicated by stable isotopes. Biogeochemistry 111(1–3), 535–554.

  37. Bennion, H., Carvalho, L., Sayer, C.D., Simpson, G.L. & Wischnewski, J. (2012) Identifying nutrient and climate impacts on diatom dynamics in Loch Leven from recent sediment records. Freshwater Biology 57(10), 2015–2029.

  38. Dong, X., Bennion, H., Maberly, S.C., Sayer, C.D., Simpson, G.L. & Battarbee, R.W. (2012) Nutrients provide a stronger control than climate on inter-annual diatom dynamics in Esthwaite Water: evidence from monitoring and palaeolimnological records over the past 60 years. Freshwater Biology 57(10), 2044–2056.

  39. Rose, N.L., Yang, H., Turner, S.D. & Simpson, G.L. (2012) An assessment of the mechanisms for the transfer of lead and mercury from atmospherically contaminated organic soils to lake sediments with particular reference to Scotland, UK. Geochimica et Cosmochimica Acta 82, 113–135.

  40. Orr, H.G., des Clers, S., Simpson, G.L. Hughes, M.J., Battarbee, R.W., Cooper, L., Dunbar, M.J., Evans, R., Hannaford, J., Hannah, D.M., Laize, C., Richards, K.S., Watts, G., Wilby, R.L. (2012) Changing water temperatures: a surface water archive for England and Wales. Proceedings of the British Hydrological Society Third International Conference. British Hydrological Society.

  41. Davidson, T.A., Bennion, H., Sayer, C.D., Jeppesen, E., Clarke, G.H., Morley, D., Odgaard, B., Rasmussen, P., Rawcliffe, R., Simpson, G.L. & Amsinck S.L. (2011) The role of cladocerans in tracking long-term change in shallow lake trophic status. Hydrobiologia 676(1), 299–315.

  42. Wischnewski, J., Kramer, A., Kong, Z., Mackay, A.W., Simpson, G.L., Mischke, S. & Herzschuh, U. (2011) Terrestrial and aquatic responses to climate change and human impact on the southeastern Tibetan Plateau during the past two centuries. Global Change Biology 17(11), 3376–3391.

  43. Battarbee, R.W., Morley, D., Bennion, H., Simpson, G.L., Hughes, M. & Bauere, V. (2011) A palaeolimnological meta-database for assessing the ecological status of lakes. Journal of Paleolimnology 45(4), 405–414.

  44. Bennion, H., Simpson, G.L., Anderson, N.J., Clarke, G., Dong, X., Hobaeck, A., Guilizzoni, P., Marchetto, A., Sayer, C.D., Thies, H. & Tolotti, M. (2011) Defining reference conditions and restoration targets for European lakes. Journal of Paleolimnology. 45(4), 415–431.

  45. Bennion, H. and Simpson, G.L. (2011) The use of diatom records to establish reference conditions for UK lakes subject to eutrophication. Journal of Paleolimnology 45(4), 469–488.

  46. Battarbee, R.W., Simpson, G.L., Bennion, H., & Curtis, C.J. (2011) A reference typology of upland lakes in the UK based on pre-acidification diatom assemblages from lake sediment cores. Journal of Paleolimnology 45(4), 489–505.

  47. Bennion, H., Battarbee, R.W., Sayer, C.D., Simpson, G.L., & Davidson, T.A. (2011) Defining reference conditions and restoration targets for lake ecosystems using palaeolimnology: a synthesis. Journal of Paleolimnology 45(4), 533–544.

  48. Helliwell, R.C. & Simpson, G.L. (2010) The present is the key to the past, but what does the future hold for the recovery of surface waters from acidification?. Water Research 44(10), 3166–3180.

  49. Curtis, C.J., Flower, R.J., Rose, N.R., Shilland, J., Simpson, G.L., Turner, S., Yang, H., & Pla, S. (2010) Palaeolimnological assessment of lake acidification and environmental change in the Athabasca Oil Sands Region of northern Alberta. Journal of Limnology 69(Suppl. 1), 92–104.

  50. Simpson, G.L. & Anderson, N.J. (2009) Deciphering the effect of climate change and separating the influence of confounding factors in sediment core records using additive models. Limnology and Oceanography 54(6, part 2), 2529–2541.

  51. Leavitt, P.R., Fritz, S.C., Anderson, N.J., Baker, P.A., Blenckner, T., Bunting, L, Catalan, J., Conley, D.J., Hobbs, W., Jeppesen E., Korhola, A., McGowan S., Rühland, K., Rusak, J.A., Simpson, G.L., Solovieva, N., Werne, J. (2009) Paleolimnological evidence of the effects on lakes of energy and mass transfer from climate and humans. Limnology and Oceanography 54(6, part 2), 2330–2348.

  52. Moss, B and 41 others (2009) Climate change and the future of freshwater biodiversity in Europe: a primer for policy-makers. Freshwater Reviews 2(2), 103–130.

  53. Battarbee, R.W., Monteith, D.T., Juggins, S., Simpson, G.L., Shilland E.W., Flower R.J. & Kreiser, A.M. (2008) Assessing the accuracy of diatom-based transfer functions in defining reference pH conditions for acidified lakes in the United Kingdom. The Holocene 18(1), 57–67.

  54. Holden, P.B., Mackay, A.W. & Simpson, G.L. (2008) A Bayesian palaeoenvironmental transfer function model for acidified lakes. Journal of Paleolimnology 39(4), 551–566.

  55. Simpson, G.L. (2007) Analogue methods in palaeoecology: Using the analogue package. Journal of Statistical Software 22(2), 1–29.

  56. Battarbee, R.W., Morley, D., Bennion, H. & Simpson, G.L. (2007) A meta-database for recent paleolimnological studies. PAGES News 15(1), 23–24.

  57. Sayer, C.D., Jackson, M.J., Hoare, D., Simpson, G.L., Henderson, A.C.G., Liptrott, E.R., Appleby, P.G., Boyle, J.F., Jones, I.J. & Waldock, M.J. (2006) TBT causes regime shift in shallow lakes? Environmental Science and Technology 40(17), 5269–5275.

  58. Simpson, G.L., Shilland, E.M., Winterbottom, J.M., & Keay, J. (2005) Defining reference conditions for acidified waters using a modern analogue approach. Environmental Pollution 137, 119–133.

  59. Battarbee, R.W., Monteith, D.T., Juggins, S., Evans, C. D., Jenkins, A. and Simpson, G.L. (2005) Reconstructing pre-acidification pH for an acidified Scottish loch: a comparison of palaeolimnological and modelling approaches. Environmental Pollution 137, 135–149.

  60. Bennion, H., Fluin, J., & Simpson, G.L. (2004) Assessing eutrophication and defining ecological reference conditions for a set of Scottish freshwater lochs using sub-fossil diatom assemblages. Journal of Applied Ecology 41, 124–138.

  61. Bennion, H., Simpson, G., Battarbee, R.W., Cameron, N.G., Curtis, C., Flower, R.J. Hughes, M., Jones, V.J., Kernan, M., Monteith, D.T., Patrick, S.T., Rose, N.L., Sayer, C.D. & Yang, H. (2002) Environmental change in Scottish fresh waters. In M.B. Usher, E.C. Mackey & J.C. Curran (Eds) The State of Scotland’s Environment and Natural Heritage. The Stationery Office, Edinburgh. pp. 145–152.