Research
He is the current project lead for the with Forestry and Land Scotland Framework Agreement for the Provision of Soil Surveys (2022-26). He has experience in soil survey, soil sampling and description, land evaluation and soil classification with a particular interest in the World Reference Base for Soil Resources (WRB). He has worked on many vegetation monitoring projects including The Scottish Environmentally Sensitive Areas Monitoring Scheme (1995-2004), The re-visitation of vegetation records from the 1960’s and 1970’s to elucidate long-term changes across Scotland (2003-2015), herbivore impact assessments in the Scottish uplands (1997-2002), Vegetation change on Scottish dune systems (2005-2010), and more recently on woodland dynamics in relation to ash dieback and potential effects of threats to oak in the UK. He has a particular interest in lower plants most notably in relation to bryophyte and lichen ecology. He has also been involved in forensic botany casework for Police Scotland and other police services in England and Wales.
Publications
Journals
- Mitchell, R.J.; Bellamy, P.; Broome, A.; Ellis, C.; Hewison, R.; Iason, G.; Littlewood, N.; Newey, S.; Pozsgai, G.; Dunan, R.; Stockan, J.; Stokes, V.; Taylor, A. (2022) Cumulative impact assessments of multiple host species loss from plant diseases show disproportionate reductions in associated biodiversity, Journal of Ecology, 110(1), 221-231
- Brooker, R.W.; Hewison, R.; Mitchell, C.; Newton, A.C.; Pakeman, R.J.; Schöb, C.; Karley, A.J. (2021) Does crop genetic diversity support positive biodiversity effects under experimental drought?, Basic and Applied Ecology, 56, 431-445
- Mitchell, R.J; Hewison, R.L.; Beaton, J.; Douglass J.R. (2021) Identifying substitute host tree species for epiphytes: the relative importance of tree size and species, bark and site characteristics., Applied Vegetation Science, 24(2), Article No. e12569
- Mitchell, R.J.; Hewison, R.L.; Haghi, R.K.; Robertson, A.H.J.; Main, A.M.; Owen, I.J. (2021) Functional and ecosystem service differences between tree species: implications for tree species replacement, Trees, 35, 307-317
- Pakeman, R.J.; Brooker, R.W.; Karley, A.J.; Newton, A.C.; Mitchell, C.; Hewison, R.L.; Pollenus, J.; Guy, D.C.; Schöb, C. (2020) Increased crop diversity reduces the functional space available for weeds., Weed Research, 60, 121-131.
- Hester, A.J.; Britton, A.J.; Hewison, R.L.; Ross, L.; Potts, J. (2019) Long-term vegetation change in Scotland’s native forests., Biological Conservation, 235, 136-146.
- Mitchell, R.J.; Bellamy, P.E.; Ellis C.J.; Hewison, R.L.; Hodgetts, N.G.; Iason, G.R.; Littlewood, N.A.; Newey, S.; Stockan, J.A.; Taylor, A.F.S. (2019) Collapsing foundations: the ecology of the British oak, implications of its decline and mitigation options., Biological Conservation, 233, 316-327.
- Mitchell, R.J.; Hewison, R.L.; Fielding, D.A.; Fisher, J.M.; Gilbert, D.J.; Hurskainen, S.; Pakeman, R.J.; Potts, J.M.; Riach, D. (2018) Decline in atmospheric sulphur deposition and changes in climate are the major drivers of long-term change in grassland plant communities in Scotland., Environmental Pollution, 235, 956-964
- Mitchell, R.J.; Hewison, R.L.; Britton, A.J.; Brooker, R.W.; Cummins, R.P.; Fielding, D.A.; Fisher, J.M.; Gilbert, D.J.; Hester, A.J.; Hurskainen, S.; Pakeman, R.J.; Potts, J.M.; Riach, D. (2017) Forty years of change in Scottish grassland vegetation: increased richness, decreased diversity and increased dominance., Biological Conservation, 212, 327-336.
- Pakeman, R.J.; Hewison, R.L.; Lewis, R.J. (2017) Linking functional traits and species preferences to species’ abundance and occupancy trends through time to identify habitat changes in coastal ecosystems., Perspectives in Plant Ecology, Evolution and Systematics, 27, 35-44.
- Pakeman, R.J.; Hewison, R.L.; Riach, D.; Fisher, J.; Hurskianen, S.; Fielding, D.; Mitchell, R.J. (2017) Long-term functional structure and functional diversity changes in Scottish grasslands., Agriculture, Ecosystems and Environment, 247, 352-362.
- Britton, A.J.; Hewison, R.L.; Mitchell, R.J.; Riach, D . (2017) Pollution and climate change drive long-term change in Scottish wetland vegetation composition., Biological Conservation, 210, 72-79.
- Britton, A.J.; Hester, A.J.; Hewison, R.L.; Potts, J.M.; Ross, L.C. (2017) Climate, pollution and grazing drive long-term change in moorland habitats., Applied Vegetation Science, 20, 194-203.
- Pakeman, R.J.; Hewison, R.L.; Lewis, R.J. (2017) Drivers of species richness and compositional changes in Scottish coastal vegetation., Applied Vegetation Science, 20, 183-193.
- Mitchell, R.J.; Hester, A.J.; Hewison, R.L.; Broome, A.; Kirby, K.J. (2016) Potential impacts of the loss of Fraxinus excelsior due to ash dieback on woodland vegetation in Great Britain., New Journal of Botany, 6, 2-15.
- Pakeman, R.J.; Alexander, J.; Brooker, R.; Cummins, R.; Fielding, D.; Gore, S.; Hewison, R.; Mitchell, R.; Moore, E.; Erford, K.; Pemberton, C.; Trinder, C.; Lewis, R. (2016) Long-term impacts of nitrogen deposition on coastal plant communities., Environmental Pollution, 221, 337-347.
- Pakeman, R.J.; Alexander, J.; Beaton, J.; Brooker, R.; Cummins, R.; Eastwood, A.; Fielding, D.; Fisher, J.; Gore, S.; Hewison, R.; Hooper, R.; Lennon, J.; Mitchell, R.; Moore, E.; Nolan, A.; Orford, K.; Pemberton, C.; Riach, D.; Sim, D.; Stockan, J.; Trinder, C.; Lewis, R. (2015) Species composition of coastal dune vegetation in Scotland has proved resistant to climate change over a third of a century., Global Change Biology, 21, 3738-3747.
- Mitchell, R.J.; Beaton, J.K.; Bellamy, P.E.; Broome, A.; Chetcuti, J.; Eaton, S.; Ellis, C.J.; Gimona, A.; Harmer, R.; Hester, A.J.; Hewison, R.L.; Hodgetts, N.G.; Iason, G.R.; Kerr, G.; Littlewood, N.A.; Newey, S.; Potts, J.M.; Pozsgai, G.; Ray, D.A.; Stockan, J.A.; Taylor, A.F.S.; Woodward, S. (2014) Ash dieback in the UK: a review of the ecological and conservation implications and potential management options., Biological Conservation, 175, 95-109.
- Mitchell, R.J.; Hester, A.J.; Campbell, C.D.; Chapman, S.J.; Cameron, C.M.; Hewison, R.L.; Potts, J.M. (2012) Explaining the variation in the soil microbial community: do vegetation composition and soil chemistry explain the same or different parts of the microbial variation?, Plant and Soil, 351, 355-362.
- Mitchell, R.J.; Hester, A.J.; Campbell, C.D.; Chapman, S.J.; Cameron, C.M.; Hewison, R.L.; Potts, J.M. (2010) Is vegetation composition or soil chemistry the best predictor of the soil microbial community?, Plant and Soil, 333, 417-430.
- Britton, A.J.; Beale, C.M.; Towers, W.; Hewison, R.L. (2009) Biodiversity gains and losses: evidence for homogenisation of Scottish alpine vegetation., Biological Conservation, 142, 1728-1739.
Books / chapters
- Aitkenhead, M.; Hewison, R. (2022) Official Handbook of the International Soil Judging Contest, July 27-31, 2022, Printed material used for teaching, shared online.
- Mitchell, R.; Hewison, R.; Britton, A.; Pakeman, R.J.; Hester, A. (2016) Long-term changes in Scottish grassland plant communities., In: Pakeman, R.J. (ed.). Grassland Biodiversity. The James Hutton Institute, Craigiebuckler, Aberdeen, pp4-5.
Technical / contract reports
- Hewison, R.L.; Addy, S.; Riach, D.; Donnelly, D. (2024) Hartwood (Murdostoun) 2023 Soil Survey Report, Technical Report sent to client and survey data added to Forester Web GIS
- Hewison, R.L.; Riach, D.; Sharififar, A.; Donnelly, D. (2024) Cardenden 2023 Soil Survey Report, Technical Report sent to client and survey data added ro Forester Web GIS
- Hewison, R.L.; Riach, D.; Donnelly, D. (2024) Ochtertyre Moss Wood 2023 Soil Survey Report, Technical Report sent to client and survey data added to Forester Web GIS
- Hewison, R.L.; Riach, D.; Sharififar, A.; Donnelly, D. (2024) Pitcairn 2023 Soil Survey Report, Technical Report sent to client and survey data added to Forester Web GIS
- Hewison, R.L.; Riach, D.; Addy, S.; Beesley, L.; Donnelly, D.; Donnelly, D. (2024) Backhill of Bush 2023 Block Soil Survey Report, Technical Report sent to client and survey data added to Forester Web GIS
- Hewison, R.L.; Riach, D.; Addy, S.; Donnelly, D. (2024) Ptarmigan 2023 Block Soil Survey Report, Technical Report sent to client and survey data dded to Forester Web GIS
- Hewison, R.L.; Riach, D.; Addy, S.; Donnelly, D. (2024) East Loch Lomond 2023 Block Soil Survey Report, Technical Re[port sent to client and survey data added to Forester Web GIS
- Hewison, R.L.; Riach, D.; Addy, S.; Donnelly, D. (2024) Strathyre 2023 Soil Survey Report, Technical Report sent to client and survey data added to Forester Web GIS
- Hewison, R.L.; Addy, S.; Riach, D.; Donnelly, D. (2024) Hartwood (Mossband) 2023 Soil Survey Report, Technical Report sent to client and survey data added to Forester Web GIS
- Mitchell, R.; Fielding, D.; Hewison, R.; Jabloun, M.; Pakeman, R.; Rivington, M.; Taylor, A. (2023) Enhancing the Biodiversity of the Glen Lochay Estate Assessing the baseline and identifying options for potential future biodiversity management strategies and activities Report to Glen Lochay Estate, Report to Estate.
- Hewison, R. L.; Aitkenhead, M. (2022) International Union of Soil Sciences World Congress 2022 Soil Judging Competition Stirling 26-31 July Summary of Soil Profiles, Article/data/site maps shared Google drive site with permissions access for participants and their supervisors/event organisers.
- Hewison, R.L.; Butler, B.M. (2022) The Soils of the Isle of Arran with Special Reference to the Description and Classifcation of Soil Profiles visited on the WCSS Excursion on August 5th 2022, Document e mailed to participants following the excursion.
- Nolan, A.J.; Hewison, R.L.; Beesley, L.; Riach, D.J.; Addy, S.J.; Donnelly, D. (2022) Soil Survey Digital Map Data and Reports, Scale 110,000, Volume 163 Cruach Tairbeirt Forest Block 2022, Cowal Trossachs Forest District, Digital Soils Data and Report Uploaded into ForesterWeb GIS, Forestry and Land Scotland
- Nolan, A.J.; Riach, D.J.; Addy, S.J.; Hewison, R.L.; Beesley, L.; Donnelly, D. (2022) Soil Survey Digital Maps and Reports, Scale 110,000, Volume 162 Kilmichael Forest 2022 Block, West Argyll Forest District, Digital Soils Data and Report Uploaded into ForesterWeb GIS, Forestry and Land Scotland
- Nolan, A.J.; Hewison, R.L.; Beesley, L.; Riach, D.J.; Addy, S.J.; Donnelly, D. (2022) Soil Survey Digital Maps and Reports, Scale 110,000, Volume 160 Strathlachlan Forest Main Block 2022, Cowal Trossachs Forest District, Digital Soils Data and Report Uploaded into ForesterWeb GIS, Forestry and Land Scotland
- Nolan, A.J.; Hewison, R.L.; Riach, D.J.; Butler, B.M.; Addy, S.J.; Donnelly, D. (2022) Soil Survey Digital Map Data and Reports, Scale 110,000, Volume 159 Errochty Forest West Block 2021, Tay Forest District, East Region, Digital Soil Resources uploaded within ForesterWeb – Forest Management GIS, Forestry and Land Scotland
- Nolan, A.J.; Hewison, R.L.; Riach, D.J.; Butler, B.M.; Addy, S.J.; Donnelly, D. (2022) Soil Survey Digital Map Data and Reports, Scale 110,000, Volume 158 Errochty Forest East Block 2021, Tay Forest District, East Region, Digital Soil Resources uploaded within ForesterWeb – Forest Management GIS, Forestry and Land Scotland
- Nolan, A.J.; Riach, D.J.; Butler, B.M.; Addy, S.J.; Hewison, R.L.; Beesley, L.; Donnelly, D. (2022) Soil Survey Digital Map Data and Reports, Scale 110,000, Volume 157 South Rannoch 2021 Block, Tay Forest District, East Region, Digital Soil Resources uploaded within ForesterWeb – Forest Management GIS, Forestry and Land Scotland
- Nolan, A.J.; Hewison, R.L.; Riach, D.J.; Donnelly, D. (2022) Soil Survey Digital Map Data and Reports, Scale 110,000, Volume 156 Glen Lochy South 2021 Block, West Argyll Forest District, West Region, Digital Soil Resources uploaded within ForesterWeb – Forest Management GIS, Forestry and Land Scotland
- Nolan, A.J.; Hewison, R.L.; Donnelly, D. (2022) Soil Survey Digital Map Data and Reports, Scale 110,000, Volume 155 Cardross Moss 2021 Block, Cowal and Trossachs Forest District, Central Region, Digital Soil Resources uploaded within ForesterWeb – Forest Management GIS, Forestry and Land Scotland
- Nolan, A.J.; Hewison, R.L.; Beesley, L.; Riach, D.J.; Addy, S.J.; Donnelly, D. (2022) Soil Survey Digital Map Data and Reports, Scale 110,000, Volume 154 – Succoth 2021 Block, West Argyll Forest District, West Region, Digital Soil Resources uploaded within ForesterWeb – Forest Management GIS, Forestry and Land Scotland
- Riach, D.J.; Hewison, R.L.; Nolan, A.J.; Donnelly, D. (2022) Soil Survey Digital Map Data and Reports, Scale 110,000, Volume 151 Garshellach Block, Central Forest Region, Digital Soil Resources uploaded within ForesterWeb – Forest Management GIS, Forestry and Land Scotland
- Hewison, R.L.; Beesley, L.; Riach, D.J.; Butler, B.M.; Nolan, A.J.; Donnelly, D. (2022) Soil Survey Digital Map Data and Reports, Scale 110,000, Volume 150 – Pendreich, Central Forest Region, Digital Soil Resources uploaded within ForesterWeb – Forest Management GIS, Forestry and Land Scotland
- Hewison, R.L.; Beesley, L.; Butler, B.M.; Nolan, A.J.; Donnelly, D. (2022) Soil Survey Digital Map Data and Reports, Scale 110,000, Volume 147 Crannich NorthWest and SouthEast Blocks, Island of Mull, West Argyll Forest District, Digital Soil Resources uploaded within ForesterWeb – Forest Management GIS, Forestry and Land Scotland
- Nolan, A.J.; Henderson, D.J.; Beesley, L.; Addy, S.J.; Hewison, R.L.; Butler, B.M.; Donnelly, D. (2022) Soil Survey Digital Map Data and Reports, Scale 110,000, Volume 145 Torrie 2020 Block, Cowal and Trossachs Forest District, Digital Soil Resources uploaded within ForesterWeb – Forest Management GIS, Forestry and Land Scotland
- Nolan, A.J.; Henderson, D.J.; Hewison, R.L.; Beesley, L.; Butler, B.M.; Addy, S.J.; Donnelly, D. (2022) Soil Survey Digital Map Data and Reports, Scale 110,000 Volume 144 Loch Katrine 2020, Cowal and Trossachs Forest District, Digital Soil Resources uploaded within ForesterWeb – Forest Management GIS, Forestry and Land Scotland
- Hewison, R.L.; Nolan, A.J.; Donnelly, D. (2021) Soil Survey Digital Map Data and Reports, Scale 1:10,000, Volume 142 – Durris Forest South-West Block, 2020, Moray & Aberdeenshire Forest District, East Region., Digital Soil Resources within ForesterWeb – Forest and Land Scotland GIS and Management Tool.
- Nolan, A.J.; Hewison, R.L.; Donnelly, D. (2021) Soil Survey Digital Map Data and Reports, Scale 1:10,000, Volume 140 – Durris Forest North-East Block, 2020, Moray & Aberdeenshire Forest District, East Region., Digital Soil Resources within ForesterWeb – Forest and Land Scotland GIS and Management Tool.
- Nolan, A.J.; Henderson, D.J.; Hewison, R.L.; Beesley, L.; Butler, B.M.; Donnelly, D. (2021) Soil Survey Digital Map Data and Reports, Scale 1:10,000, Volume 135 – Glen Sherup Forest, 2020, Tay Forest District, East Region., Digital Soil Resources within ForesterWeb – Forest and Land Scotland GIS and Management Tool.
- Nolan, A.J.; Hewison, R.L.; Beesley, L.; Butler, B.M.; Riach, D.J.; Addy, S.J.; Donnelly, D. (2021) Soil Survey Digital Map Data and Reports, Scale 1:10,000, Volume 131 – Glentrool Main Block 2020, Galloway Forest District, South Region., Digital Soil Resources within ForesterWeb – Forest and Land Scotland GIS and Management Tool.
Conference papers
- Hewison, R.L.; Smith, S.; Fielding, D.; Pakeman, R. (2024) Long-Term Experimental Sites, Environmental Monitoring Programs and Natural Resource Surveys, Poster produced for the Biodiversity Group for the Ecological Sciences Review, February 2024
- Brooker, R.; Hewison, R.; Mitchell, C.; Newton, A.; Neilson, R.; Pakeman, R.; Raubach, S.; Shaw, P.; Verrall, S.; Karley, A. (2023) Crop mixtures as part of the sustainability toolbox for the distilling industry, World Distilled Spirits Conference, 9 May 2023, EICC, Edinburgh.
- Hewison, R. L. (2022) Parent Materials in the Stirling District and their relationship with Landscape and Topography, Paper given at a Soil Judging Competition/Training Course.
- Brooker, R.; Newton, A.; Pakeman, R.; Mitchell, C.; Hewison, R.; Karley, A. (2022) Identifying challenges and developing solutions lessons from participatory approaches to improving and promoting crop mixtures, Crop Production in Northern Britain Conference, 1-2 March 2022, Online.
- Mitchell R.J.; Hester A.H.; Campbell C.D.; Chapman S.J.; Cameron C.M.; Hewison R.L.; Potts J.M. (2010) Predicting the soil microbial community: is vegetation composition or soil chemistry the better predictor?, British Ecological Society Conference, University of Leeds, Leeds, 7-9 September 2010.
- Britton, A.J.; Hester, A.J.; Beale, C.; Hewison, R.L.; Towers, W. (2010) Drivers of biodiversity change in british alpine habitats., Global Change and the World’s Mountains, Perth, Scotland, 26-30 September 2010.
Conference posters / abstracts
- Hewison, R.L.; Nolan, A.J.; Riach, D.; Addy, S.; Donnelly, D.; Miller, D.; Beesley, L.; Henderson, D.; Bell, J.; Harvey-Brosnan, V.; Haufe, J. (2024) Sustainable Forestry: The Imperative of Soil Mapping in Forest Resource Inventory, Modelling and Management in Scotland, UK, Poster presentation at the Centennial Celebration and Congress of the International Union of Soil Sciences, 19-21 May 2024, Florence, Italy
- Mitchell, R.J.; Hewison, R.; Haghi, R.K.; Robertson, A.J.; Main, A.; Owen, J. (2020) Functional and ecosystem service differences between
tree species implications for tree species replacement., British Ecological Society Annual Meeting, Edinburgh 14-17 December 2020, Online. (Poster)
- Brooker, R.W.; Hewison, R.; Mitchell, C.; Newton, A.C.; Pakeman, R.J.; Schöb, C.; Karley, A.J. (2018) Crop mixtures., BES Annual Meeting 2018, Birmingham, 16-19 December. (Poster)
- Holland, J.E.; Poggio, L.; Hewison, R.; Huang, J.; Taylor, J.; Triantafilis, J. (2017) High resolution estimation of peat depth using electromagnetic induction in a Scottish peatland., Pedometrics 2017, Wageningen, The Netherlands, 26 June – 1 July 2017. Book of Abstracts, p101.
- Hewison, R.; Bell, J.: Nolan, A. (2014) ECN Soil Monitoring Protocols. To classify the soils at ECN sites, to characterise and quantify their physical, chemical and mineralogical properties and to quantify temporal changes in those properties., UK Environmental Change Network (ECN) 20 Year Symposium, Lancaster University, 12-13 May 2014.
- Hewison, R.; Taylor, C. (2014) ECN Soil Solution Chemistry. Monitoring methods for assessing soil moisture and the chemical composition of soil solution at ECN sites across the UK., UK Environmental Change Network (ECN) 20 Year Symposium, Lancaster University, 12-13 May 2014.
- Nolan, A.J.; Rayner, B.; Kennedy, A.; Brown, C.; Donnelly, D.; Bell, J.S.; Henderson, D.J.; Towers, W.; Hewison, R.L.; Beesley, L.; Riach, D.J.R. (2014) Sustainable forestry: the imperative of soil mapping in forest resource inventory, modelling and management in Scotland, UK., 20th World Congress of Soil Science, Soils Embrace Life and Universe, Jeju, South Korea, 8-13 June 2014.
- Hester, A.J.; Britton, A.J.; Beale, C.M.; Towers, W.; Hewison, R.L. (2008) Biodiversity losses in Scottish alpine vegetation: What are the key drivers?, EURECO-GFOE Conference, Leipzig, Germany, 14-18 September 2008.
- Papanikolau, N.; Johnson, D.; Britton, A.J.; Helliwell, R.C. (2007) Dynamics of litter decomposition under simulated nitrogen deposition and climate manipulations in a montane heathland., British Ecological Society Annual Meeting, University of Glasgow, 10-12 September 2007.