Nadia Barsoum

BSc, PhD

Related research

Research topic

Forest Management Adaptation (AdaFor) 2013 -2015

Details of the Forest Management Adaption project working to ensure forests are sustainable in the future

Status: Completed


  • Climate change
  • Forest management
  • Ecosystem services
Research topic

Provenance Trial at Hucking

Provenance trials are a series of studies that has planted trees from different provenances in order to assess their performance

Status: Current


  • Climate change
Research topic

Further information

Details of further information

Status: Current


  • Climate change
Research topic

Woodland Diversification

Woodland Diversification Managing woodland stands in a way that retains productivity targets, but that also fosters biodiversity and stand resilience are key sustainable forest management goals. Current forestry policy advocates…

Status: Current


  • Climate change
  • Forest management
  • Pests and diseases
Research topic

Management of multifunctional forests (MULTIFOR)

This four-year project involved a partnership of research organisations and local authorities from northern France and southern England, two regions with similar production and semi-natural forest ecosystems. Forest Research helped to develop common management strategies to maximise the economic, environmental and social benefits from forests in the two regions and to improve their resilience to climate change.

Status: Completed


  • Forest management
  • Ecosystem services
  • Socio economic research
Research topic

Tree health and ectomycorrhizal fungal communities

Research examining whether there are links between tree health and ectomycorrhizal fungal communities under changing environmental conditions

Status: Current

Related publications

Research Note

Encouraging biodiversity at multiple scales in support of resilient woodlands

Woodland ecosystems are integral to our health, well-being, security and economy, but they face a number of pressures including climate change, land-use intensification, and emerging pests and diseases. This Research…


  • Ecosystem services
Research summaries

Getting to know the ‘friendly fungi’ associated with the roots of key timber species

Nadia Barsoum provides highlights of over 10 years of research shedding light on who’s who in the world of friendly fungi colonising tree roots.


  • Climate change
  • Ecosystem services
  • Soil science
Climate change series

Factsheet: Climate change and biodiversity

More biodiverse woodlands are better able to resist or adapt to threats, such as climate change. This enhanced resilience supports the continuity of woodlands and the ecosystem services they provide. Biodiversity is the variation at different levels of biological organisation - the genes within a species; the species within a community; and the diversity between communities and ecosystems.


  • Climate change
  • Ecosystem services
  • Genetics

Main recent publications

Peer-reviewed publications

Messier, C., Bauhus, J., Sousa-Silva, R., Auge, H., Baeten, L., Barsoum, N., … & Zemp, D.C. (2021) For the sake of resilience and multifunctionality, let’s diversify planted forests! Conservation Letters (in press) 

TeaOh et al  (in press) Effects of climate and atmospheric nitrogen deposition on early to mid-term stage litter decomposition across biomes" Frontiers in Forests and Global Change

Barsoum, N., A’Hara, S. W., Cottrell, J.E., Forster, J., Garcia, M.S.J., Schonrogge, K. and Shaw, L. (2021) Root ectomycorrhizal status of oak trees symptomatic and asymptomatic for Acute Oak Decline in southern Britain. Forest Ecology and Management 482, 118800

Mazal, L., Corenblit, D., Barsoum, N., Steiger, J., Skot, L., Fumanal, B., Till-Bottraud, I. (2021) Fine-scale spatial genetic structure and intra-specific interactions of Populus nigra within a natural river corridor along the lower Allier River (France) Flora 275, 151763

Poeydebat, C., Jactel, H., Moreira, X., Koricheva, J., Barsoum, N., et al. (2021). Climate affects neighbour-induced changes in leaf chemical defences and tree diversity-herbivory relationships. Functional Ecology 35 (1), 67-81

Field, E., Castagneyrol, B., Gibbs, M., Jactel, H., Barsoum, N., Schönrogge, K. and Hector, A. (2020). Associational resistance to both insect and pathogen damage in mixed forests is modulated by tree neighbour identity and drought. Journal of Ecology 108 (4), 1511-22.

Barsoum, N., Godsman, K. and Oxbrough, A. (2020) Diversity trends of forest floor biota in UK plantation forests. Quarterly Journal of Forestry (in press)

Jeliazkov, A., Mijatovic, D., Chantepie, S., Andrew, N. Arlettaz, R., Barbaro, L., Barsoum, N. et al. (2020) A global database for metacommunity ecology, integrating species, traits, environment and space. Nature - Scientific Data 7, 6.

Field, E., Schönrogge, K., Barsoum, N., Hector, A. and Gibbs, M. (2019) Individual tree traits shape insect and disease damage on oak in a climate‐matching tree diversity experiment. Ecology and Evolution, 9(15): 8524-8540.

Evans, P. M., Newton, A.C., Cantarello, E., Sanderson, N., Jones, D.L., Barsoum, N., Cottrell, J. E., A'Hara, S. W., Fuller, L. (2019) Testing the relative sensitivity of 102 ecological variables as indicators of woodland condition in the New Forest, UK.  Ecological Indicators, 107: 105575

Barsoum, N., Bruce, C., Forster, J., Ji, Yin-Qi and Yu, D.W. (2019) The devil is in the detail: Metabarcoding of arthropods provides a sensitive measure of biodiversity response to forest stand composition compared with surrogate measures of biodiversity. Ecological Indicators, 101:313–323.

Barsoum, N., A’Hara, S., Cottrell, J. and Green, S. (2018) Using DNA barcoding and metabarcoding to detect species and improve forest biodiversity monitoring. Forestry Commission Research Note 32. Forestry Commission, Edinburgh.

Grossman, J.J., Vanhellemont, M., Barsoum, N., Bauhus, J., Bruelheide, H., Castagneyrol, B., Cavender-Bares, J., Eisenhauer, N., Ferlian, O., Gravel, D., Hector, A., Jactel, H. et al. (2018) Synthesis and future research directions linking tree diversity to growth, survival, and damage in a global network of tree diversity experiments. Environmental and Experimental Botany, 152: 68-89 doi: 10.1016/j.envexpbot.2017.12.015

Paquette, A., Hector, A., Castagneyrol, B., Vanhellemont, M., Koricheva, J., Scherer-Lorenzen, M., Verheyen, K., Abdala-Roberts, L., Auge, H., Barsoum, N. et al. (2018) A million and more trees for science. Nature Ecology & Evolution, 2: 763–766.

Bellamy, C., Barsoum, N., Cottrell, J.  and Watts, K. (2018) Encouraging biodiversity at all scales in support of resilient woodlands. Forestry Commission Research Note FCRN033. Forestry Commission, Edinburgh.

Djukic, I.,  Kepfer-Rojas, S.,  Schmidt, I.K.,  Larsen, K.S., Beier, C., Berg, B. Kris Verheyen,K., ..Barsoum, N. et al. (2018) Early stage litter decomposition across biomes. Science of the Total Environment, 628–629: 1369-1394.

Suz, L.M., Kallow, S., Reed, K., Bidartondo, M.I. and Barsoum, N. (2017) Pine mycorrhizal communities in pure and mixed pine-oak forests: abiotic environment trumps neighboring oak host effects. Forest Ecology and Management, 406:370-380. DOI:

P. M. Evans, A. C. Newton, E. Cantarello, P. Martin, N. Sanderson, D. L. Jones, N. Barsoum, J. E. Cottrell, S. W. A'Hara, L. Fuller 2017 Thresholds of biodiversity and ecosystem function in a forest ecosystem undergoing dieback. Scientific Reports 7(1) DOI: 10.1038/s41598-017-06082-6

Barsoum, N., Coote, L., Eycott, A.E., Fuller, L. and Kiewitt, A. and Davies, R.G. (2016) Diversity, functional structure and functional redundancy of woodland plant communities: how do mixed tree species plantations compare with monocultures? Forest Ecology and Management, 382, 244-256.

Verheyen, K., Vanhellemont, M., Auge, H., Baeten, L., Baraloto, C., Barsoum, N., Bilodeau-Gauthier, S. Bruelheide, H., Castagneyrol, B., Godbold, D., Haase, J., Hector, A., Jactel, H., Koricheva, J., Loreau, M., Mereu, S., Messier, C., Muys, B., Nolet, P., Paquette, A., Parker, J., Perring, M., Ponette, Q., Potvin, C., Reich, P., Smith, A. & Scherer-Lorenzen, M. (2016) Contributions of a global network of tree diversity experiments to sustainable forest plantations. Ambio 45(1): 29-41.

Barsoum, N., Gill, R., Henderson, L., Peace, A., Quine, C., Saraev, V., and G. Valatin (2016) Biodiversity and rotation length: economic models and ecological evidence. Forestry Commission Research Note, FCRN022.Forestry Commission, Edinburgh.

Barsoum, N. and Henderson, L. (2016) Converting planted non-native conifer to native woodlands: a review of the benefits, drawbacks and experience in Britain. Forestry Commission Research Note 24. Forestry Commission, Edinburgh.

Spake. R., Barsoum, N., Newton, A.C., C., Doncaster, P.C. (2016) Drivers of the composition and diversity of carabid functional traits in UK coniferous plantations. Forest Ecology and Management: 359, 300–308.

Barsoum, N. (2015) Mixed provenance and mixed species trials aimed at informing the debate on how to prepare native tree species for climate change in England. Quarterly Journal of Forestry : 109(3):201-207.

McCartan, S.A., Jinks, R.L. and Barsoum, N. (2015) Using thermal time models to predict the impact of assisted migration on the synchronization of germination and shoot emergence of pedunculate oak (Quercus robur L.). Annals of Forest Science:1-9. doi: 10.1007/s13595-014-0454-5

Suz, L.M., Barsoum, N., Benham, S., Cheffings, C., Cox, F., Hackett, L., Jones, A.G., Mueller, G.M., Orme, D., Seidling, W., Van der Linde, S., Bidartondo, M.I. (2015) Monitoring ectomycorrhizal fungi at large scales for science, management, conservation and environmental policy. Annals of Forest Science doi:10.1007/s13595-014-0447-4

Barsoum, N., Eaton E. L., Levanič, T., Pargade, J., Bonnart, X., Morison J. I. L. (2014) Climatic drivers of oak growth over the past one hundred years in mixed and monoculture stands in southern England and northern France. European Journal of Forest Research 134: 33-51.

Suz, L. M., Barsoum, N., Benham, S., Dietrich, H.P., Fetzer, K.D., Fischer, R., García, P., Gehrman, J., Kristöfel, F., Manninger, M.1, Neagu, S., Nicolas, M., Oldenburger, J., Raspe, S., Sánchez, G., Schröck, H.W., Schubert, A., Verheyen, K., Verstraeten, A. and Bidartondo, M.I. (2014) Environmental drivers of ectomycorrhizal communities in Europe's temperate oak forests. Molecular Ecology 23(22): 5628-44. doi: 10.1111/mec.12947

Barsoum, N., Fuller, L, Ashwood, F., Reed, K., Bonnet-Lebrun, A.-S. and Leung, F (2014) Ground-dwelling spider (Araneae) and carabid beetle (Coleoptera: Carabidae) community assemblages in mixed and monoculture stands of oak (Quercus robur L./Quercus petraea (Matt.) Liebl.) and Scots pine (Pinus sylvestris L.). Forest Ecology and Management. 321: 29–41.

Chirici, G., McRoberts, R. E., Winter, S., Bertini, R., Brändli, U.-B. Asensio, I.A, Barsoum, N., Bastrup-Birk, A., Rondeux, J., and Marchetti, M. (2012). National Forest Inventory contributions to forest biodiversity monitoring. Forest Science 58(3):257-268.

Guilloy, H., Gonzalez, E., Muller, E., Hughes, F. M. R. and Barsoum, N. (2011) Abrupt drops in water table level influence the development of Populus nigra and Salix alba seedlings of different ages. Wetlands 31 (6), 1249-1261.

Pennington, H.G., Bidartondo, M.I. and Barsoum, N. (2011). A few exotic mycorrhizal fungi dominate eucalypts planted in England. Fungal Ecology, 4, 299-302.

Cox F., Barsoum, N., Lilleskov E.A. and Bidartondo M.I. (2010). Nitrogen availability is a primary determinant of conifer mycorrhizas across complex environmental gradients. Ecology Letters, 13, 1103-1113.

Cox F., Barsoum N., Bidartondo M.I., Børja I., Lilleskov E., Nilsson L.O., Rautio P., Tubby K. and Vesterdal L. (2010). A leap forward in geographic scale for forest ectomycorrhizal fungi. Annals of Forest Science, 67(2), 200.

Barsoum, N. (2009). 3. NFI variables definitions, availability and comparability for assessing core forest biodiversity variables: 3.7 Regeneration. In 'Contribution of National Forest Inventories for Forest Biodiversity Assessment' Eds: Gherardo Chirici, Susanne Winter, Ronald McRoberts, Erkki Tomppo, Annemarie Bastrup-Birk. Springer-Verlag.

Vanguelova, E. I., Benham, S., Pitman, R., Barsoum, N., Moffat, A. J., Broadmeadow, M., Nisbet, T., Durrant, D., Wilkinson, M., Bochereau, F., Hutchings, T., Broadmeadow. S., Crow, P., Taylor, P. and Durrant, T. (2009). Chemical fluxes in time through forest ecosystems in the UK - soil response to pollution recovery. Environmental Pollution, 158 (5): 1857-1869.

Dufour, S., Barsoum, N., Muller, E. and Piégay, H. (2007). Effects of channel confinement on pioneer woody vegetation structure, composition and diversity along the River Drôme (SE France). Earth Surface Processes and Landforms 32, 1244-56.

Vangelova, E., Barsoum, N., Benham, S., Broadmeadow, N., Moffat, M., Nisbet, T. and Pitman, R. (2007). Ten Years of Intensive Forest Monitoring. Forestry Commission Information Note 88. Forestry Commission, Edinburgh.

Barsoum, N., Muller, E. and Skot, L. (2004). Variations in levels of clonality among Populus nigra L. stands of different ages. Evolutionary Ecology. 18: 601-624.

Multiple authors and editors. (2004). The Flooded Forest: Guidance on Restoring Floodplain Woodlands for Policy Makers and River Managers in Europe. pp.96.

Barsoum, N. (2002). Relative contributions of sexual and asexual regeneration strategies in Populus nigra and Salix alba during the first years of establishment on a braided gravel bed river. Evolutionary Ecology, 15, 255-279.

Guilloy-Froget, H., Muller, E., Barsoum, N., Hughes, F.M.R. (2002). Dispersal, Germination and Survival of Populus nigra L. (Saliacaceae) in Changing Hydrologic Conditions. WETLANDS 22 (3), 478-488.

Muller, E., Guilloy, H., Barsoum, N., Brocheton, L. (2002). Populus nigra L. en vallée de Garonne: legs du passé et constraintes du présent. C.R. Acad. Sciences 325, 1129-1141.

Barsoum, N. (2001). Regeneration: requirements and promotion measures. (PDF-787k). In EUFORGEN Technical Bulletin: In Situ Conservation of Populus nigra. (editors Lefèvre, F., Barsoum, N., Heinze, B., Kajba, D., Rotach, P., de Vries, S.M.G and Turok, J.) International Plant Genetic Resources Institute, Rome, Italy. Pp. 16-24.

Hughes, F.M.R., Adams, W.M., Barsoum, N., Décamps, H., Foussadier, R., Girel, J., Guilloy, H., Hayes, A., Johansson, M., Lambs, L., Muller, E., Nilsson, C., Pautou, G., Peiry, J-L., Perrow, M., Richards, K.S.R., Vautier, F., Winfield, M. (2001). Managing flows for the restoration of floodplain woodland: Local and reach scale factors in different European river types. Regulated Rivers: Research & Management 17, 325-345.

Hughes, F.M.R., Barsoum, N., Richards, K., Hayes, A., Winfield, M. (2000). The response of male and female black poplar (Populus nigra var betulifolia) to different water table depths and sediment types: Implications for flow management and river corridor biodiversity. Hydrological Processes 14, 3075-3098.

Barsoum, N. and Hughes, F.M.R. (1998). Regeneration response of Black poplar to changing river levels. In Hydrology in a Changing Environment. Vol. 1. (eds H. Wheater & C. Kirby), pp.397-412, John Wiley & Sons Ltd.

Hughes, F.M.R., Harris, T., Richards, K., Pautou, G., Barsoum, N., El-Hames, A., Girel, J., Peiry, J.-L., Foussadier, R. (1997). Woody riparian species response to different moisture conditions: Laboratory experiments on Alnus incana. J. Global Ecology and Biogeography Letters 6, 247-256.

Pautou, G., Girel, J., Peiry, J.-L., Hughes, F.M.R., Richards, K., Foussadier, R., Barsoum, N., Garguet-Duport, B., Harris, T. (1996). Changes in vegetation in fluvial hydrosystems using as examples the upper Rhône and the Isère in Grésivaudan. Rev. Ecol. Alp. Grenoble, tome III, 41-66.

Bark. A., Barsoum, N., Moore, P., Radcliffe, S., Turner, B. (1994). Software Review : Tablefit version 0.0 for Identification of Vegetation Types. Journal of Ecology, 82(4) pp. 987-8.

Proceedings/ Posters

Barsoum, N., McCartan, S., Wilkinson, M., Morison, J., Cottrell, J., Hubert, J. and Ray, D. (2015) Increasing the adaptation potential of native tree species to global change. Poster presented at end of ADAFOR project conference held at Penstock Barn, East Brabourne, Kent (March 5-6, 2015),

Bruce, C., Barsoum, N. Pedley, S., Ji, Y. and Yu, D. (2014) Metabarcoding: a powerful DNA-based tool for biomonitoring. SET for Britain 2014.

Eaton, E. L., Barsoum, N., Levanič, T., Pargade, J., Bonnart X. and Morison J. I. L. (2013) TRACE 2012 Proceedings ‘Inter-annual variation in oak growth over the past century in southern England and northern France’ International Tree ring Research Meeting (TRACE 2012) in Potsdam, Germany.

N. Barsoum, A-S. Bonnet-Lebrun, J. Brunt, A. Eycott, S. Kallow, A. Kiewitt, and M. Bidartondo. (2012) ‘Multitaxon responses to a ‘diversification’ in the composition of forest stands as an adaptation measure to global environmental change’ Conference Proceedings ‘Tackling climate change: contribution of forest scientific knowledge’ Tours, France.

Barsoum N., Eaton E. L., Levanič T., Pargade, J. Bonnart X. and Morison J. I. L (2012) ‘Key drivers of inter-annual variation in oak growth over the past century in southern Britain and north-eastern France’ Conference Proceedings ‘Tackling climate change: contribution of forest scientific knowledge’ Tours, France.

Barsoum, N., McCartan, S., Wilkinson, M., Morison, J., Cottrell, J., Hubert, J. and Ray, D. (2011). Increasing the adaptation potential of native tree species to climate change. Conference Proceedings Joint BES - Natural England Meeting ‘Adapting Conservation to a Changing Climate’ 11-12 January 2011, Charles Darwin House, London.

Barsoum, N., D. Williams, N. Straw, M. Jukes, R. Johnson, M. Bidartondo, A. Kiewitt and R. Ibrahim (2009). Consequences of increased stand structural complexity for floral diversity and the prevalence of insect pests in Sitka spruce (Picea sitchensis) stands. Conference Proceedings ‘Adapting Forest Management to Maintain the Environmental Services: Carbon Sequestration, Biodiversity, Water’. Koli National Park, Finland 21.9.-24.9.2009.

Contract reports

Lawson, C., Barsoum, N., Broadmeadow, S., Gowing, D., Nisbet, T.,  Emma Rothero, E. Skinner, A. (2018) The natural capital of floodplains: management, protection and restoration to deliver greater benefits. Valuing Nature - Natural Capital Synthesis Report. VNP09.

Barsoum, N., Henderson, L., Mackie, E., Morison, J. and Randle, T. (2015) Demonstrating a rapid biodiversity assessment methodology to facilitate the management of multiple forest ecosystem services(PDF-1132KB). Report to the FC and EU pp.94.

Eaton, E., Barsoum, N., Bonnart, X., Havet, N. and Morison, J. (2015) Oak phenology in southern England and northern France. Report to the FC and EU pp.19

Barsoum, N. A’Hara, S., Cottrell, J., Evans, P., Fuller, L. and Yu, D. (2015) Exploring the use of metabarcoding as a biomonitoring tool to detect critical thresholds of habitat cover for woodland-dependent arthropods along a gradient of beech forest dieback. Report to the FC and EU pp.28.

Barsoum, N. Gill, R., Henderson, L., Quine, C., Saraev, V. and Valatin, G. (2014) Links between biodiversity and rotation length. Report to the Forestry Commission.

Barsoum, N. and Henderson, L. (2014) Conversion of woodland from non-native to native tree species: Results of questionnaires put to forest managers on current practice. Report to the Forestry Commission.

Henderson, L., Ditchburn, B., Barsoum, N., Kirby, K. and UKNWHAP Group (2013) ‘Reporting on Forest Condition: Draft procedure’ (PDF-4810KB)Report to the Forestry Commission.

Sing, L. Barsoum, N. and Ray, D. (2013) ESC Climate Change validation study in France: An analysis to match GB and French sites in climate-matched areas. Report to EU Interreg and the Forestry Commssion.

Barsoum, N. (2012) Conversion of conifer plantation monocultures to native woodland: Current practical experience and reported influences on forest biodiversity’. Report to the Forestry Commission.

Barsoum, N., Garcia-Suarez, G. and Pitman, J. (2006) Monitoring work undertaken by Forest Research. Report to the Forestry Commission.

Barsoum, N. (2005) Data Evaluation Strategy: UK Long-Term Intensive Forest Monitoring Programme (Level II Network). Report to the Forestry Commission.

Barsoum, N., Anderson, R., Broadmeadow, S., Bishop, H and Nisbet, T. (2005). Eco-Hydrological Guidelines for Wet Woodlands - Phase 1. English Nature Research Report 619. English Nature, Peterborough.

Barsoum, N. (2000). The balance of black poplar (Populus nigra) regeneration strategies as a function of hydrology on floodplains. In 'Populus nigra' Network: Report of the Sixth Meeting, 6-8 February, 2000, Isle sur La Sorgue, France (compilers: Borelli, S., de Vries, S., Lefèvre, F., and Turok, J.) pp. 46-50, International Plant Genetic Resources Institute, Rome, Italy.

Popular articles

Barsoum, N. (2018) Getting to know the ‘friendly fungi’ associated with the roots of key timber species. Forestry and Timber News (October) 56-57.

Cox F., Barsoum E., Lilleskov E.A., Bidartondo M.I. and Seidling W. (2010). Mykorrhizierung von Kiefernwurzeln. AFZ-DerWald , 65(24), 8-10.

Barsoum, N. (2007). Forest health - has acid rain made way for climate change? (And how will we know?) Forestry and Timber News, December Issue, 17-19.