Staff profile

Most of my recent research is tied to the role of climate and habitat in determining species distributions with as particular focus on conservation biology. Much of my research examines the effects of environmental change, particularly global climate change, on ecosystems and the mechanisms by which environmental change acts upon species. I also examine how environmental change impacts upon factors such as biodiversity and causes range shifts in both native and invasive species. Most of my research in this area involves ecological modelling using spatially explicit models and GIS, often incorporating remote-sensed data, though I also undertake experimental manipulations in the field. My research has involved collaboration with many research institutions e.g. NERC Centres for Ecology and Hydrology at Monks Wood, Banchory and Dorset, Universities of York, Leeds, Birmingham, Cambridge and Copenhagen and non-academic bodies such as English Nature, Royal Society for the Protection of Birds, BirdLife International, Scottish Natural Heritage, British Trust for Ornithology, Environment Agency & Butterfly Conservation.

Research Projects

Ongoing Projects

Post-graduate Completions in 2012:

1) Louis Phipps: 2-year MRes on ‘Spatial patterns of land-use by White-backed vultures from satellite-tracking across southern Africa’ (with Prof Naidoo, Pretoria Uni)

2) David Ochanda: 2-year MRes on ‘Climate and the distribution of endemic birds in the Albertine Rift Valley,East Africa’ (with Prof Pomeroy, Kampala Uni)

3) Julia Crabbe: Research MSc on ‘Biodiversity perception and value in UK protected areas’.

4) Chantelle Kerr: Research MSc on ‘Range changes in British butterflies: the roles of climate, habitat and dispersal in patterns of spread’.

5) Charlotte Bellamy: Research MSc on ‘The use of birds as biodiversity indicators of climatic change: downscaling European indicators to regional and national trends’.

Alumni and Past Projects:

1) Climate Change and African Important Bird Areas
Funding: RSPB
Collaborators: RSPB, BirdLife International

Dr Dave Hole was employed as PDRA on this project. Dave now works for Conservation International

2) Climate change impacts on European migratory birds
Funding: NERC CASE studentship
Collaborators: RSPB

Nathalie Doswald completed this project for her PhD. Nathalie now works for WCMC, the World Conservation Monitoring Centre

3) Using Sr isotopes to infer the origins of migrant birds
Funding: Nuffield Foundation
Collaborators: Northern Centre for Isotopic and Elemental Tracing (NCIET)

Dr Laura Font was the PDRA collaborating on this project. Laura Font is now an NFI and EU funded Post-doctoral researcher at Amsterdam University.

4) Conservation in the face of climate change: developing an adaptive management framework across Africa
Funding: The Macarthur Foundation
Collaborators: The BirdLife Partnership

Dr Dave Hole was the PDRA on this project. Dave Hole now works for CI in Washington, USA.

5) Climate change impacts on protected areas across Europe
Funding: EU
Collaborators: BirdLife Europe, RSPB

Dr Yvonne Collingham was the PDRA on this project.

6) A stable isotope approach to trace the unknown breeding grounds of the Slender-billed Curlew
Funding: RSPB
Collaborators: RSPB, Northern Centre for Isotopic and Elemental Tracing (NCIET)

7) The potential costs of climate change to ecotourism revenue in Africa
Funding: Self-funded
Collaborators: University of Stirling

Georgina Palmer worked on this project for her research MSc

8) Using climate envelope models to simulate migrant bird distributions on breeding and non-breeding ranges: Applications and validation at fine spatial scales
Funding: Durham University
Collaborators: University of St Andrews

Mark Boyd worked on this project for a research MSc

9) Incorporating climatic change into the selection of priority areas for conservation
Funding: Self-funded
Collaborators: BirdLife International

George Frater worked on this project for his research MSc

Authored book

• Huntley, B., Green, R. E., Collingham, Y. C., & Willis, S. G. (2007). A climatic atlas of European breeding birds. Lynx Edicions

Book review

• Willis, S. (2006). The new standard text for fledgling ornithologists. Global Ecology and Biogeography, 15, 318-319

Chapter in book

• Huntley, B., Hole, D., & Willis, S. (2011). Assessing the effectiveness of a protected area network in the face of climatic change. In T. R. Hodkinson (Ed.), Climate change, ecology, and systematics (345-362). Cambridge University Press
• Willis, S., Hole, D., & Huntley, B. (2010). Climate change and conservation. In N. Leader-Williams, B. Adams, & R. Smith (Eds.), Trade-offs in conservation: Deciding what to save (331-348). Wiley
• Rogers, D., Randolph, S., Lindsay, S., & Willis, S. (2008). Vector-borne diseases. In D. O. H. A. H. P. Agency (Ed.), Health effects of climate change in the UK. Crown Publishing
• Lindsay, S., & Willis, S. (2006). Predicting future areas suitable for vivax malaria in the United Kingdom. Chapter in. In Foresight; Infectious diseases: Preparing for the future. Office of Science and Innovation, London
• Overpeck, J., Whitlock, C., Huntley, B., Bartlein, P., Collingham, Y., Grimm, E., …Willis, S. (2003). Terrestrial biosphere dynamics in the climate system: past and future. In Palaeoclimate, global change and the future. Springer Verlag
• Huntley, B., & Baxter, R. (2003). Insights on Synergies: Models and Methods. In L. Hannah, & T. Lovejoy (Eds.), Climate Change and Biodiversity: Synergistic Impacts (15-23). (Advances in Applied Biodiversity Science). CABS
• Hulme, P., Crawley, M., Hofgaard, A., Huntley, B., Lurtz, P., O'Connell, M., …Willis, S. (2000). Alien species and outbreaking species in ecosystems. In M. Sutton, J. Moreno, W. van der Putten, & S. Struwe (Eds.), Terrestrial ecosystem research in Europe: successes, challenges and policy (44-48). European Communities
• Wadsworth, R., Swetnam, R., & Willis, S. (1997). Seeds and sediment: modelling the spread of Impatiens glandulifera Royle. In A. Cooper, & J. Power (Eds.), Species dispersal and land-use processes (53-60). IALE (UK)
• Willis, S., Hulme, P., & Huntley, B. (1997). Habitat suitability and the distribution of alien weeds of riparian ecosystems. In A. Cooper, & J. Power (Eds.), Species dispersal and land-use processes (37-44). IALE (UK)

Journal Article

• Baker, D. J., Hartley, A. J., Pearce-Higgins, J. W., Jones, R. G., & Willis, S. G. (in press). Neglected issues in using weather and climate information in ecology and biogeography. Diversity and Distributions, 23(3), https://doi.org/10.1111/ddi.12527
• Jarrett, D., Lehikoinen, A., & Willis, S. (2023). Monitoring wader breeding productivity. Ibis: International Journal of Avian Science, https://doi.org/10.1111/ibi.13298
• Howard, C., Marjakangas, E., Morán-Ordóñez, A., Milanesi, P., Abuladze, A., Aghababyan, K., …Willis, S. G. (2023). Local colonisations and extinctions of European birds are poorly explained by changes in climate suitability. Nature Communications, 14(1), Article 4304. https://doi.org/10.1038/s41467-023-39093-1
• Branston, C. J., Whittingham, M. J., Phillimore, A. B., Leech, D., & Willis, S. G. (2023). The phenology and clutch size of UK Blue Tits does not differ with woodland composition. Ibis: International Journal of Avian Science, https://doi.org/10.1111/ibi.13248
• Marjakangas, E., Bosco, L., Versluijs, M., Xu, Y., Santangeli, A., Holopainen, S., …Lehikoinen, A. (2023). Ecological barriers mediate spatiotemporal shifts of bird communities at a continental scale. Proceedings of the National Academy of Sciences, 120(23), Article 213330120. https://doi.org/10.1073/pnas.2213330120
• Dobson, R., Challinor, A. J., Cheke, R. A., Jennings, S., Willis, S. G., & Dallimer, M. (2023). dynamicSDM: An R package for species geographical distribution and abundance modelling at high spatiotemporal resolution. Methods in Ecology and Evolution, 14(5), 1190-1199. https://doi.org/10.1111/2041-210x.14101
• Gregory, R., Eaton, M. A., Burfield, I., Grice, P. V., Howard, C., Klvaňová, A., …Burns, F. (2023). Drivers of the changing abundance of European birds at two spatial scales. Philosophical Transactions of the Royal Society B: Biological Sciences, 378(1881), Article 20220198. https://doi.org/10.1098/rstb.2022.0198
• Fuentes-Allende, N., Stephens, P., MacTavish, L., MacTavish, D., & Willis, S. (2023). Remote monitoring of short-term body mass variation in savanna ungulates. Remote Sensing in Ecology and Conservation, https://doi.org/10.1002/rse2.338
• Howard, C., Mason, T. H. E., Baillie, S. R., Border, J., Hewson, C. M., Houston, A. I., …Stephens, P. A. (2023). Explaining and predicting animal migration under global change. Diversity and Distributions, https://doi.org/10.1111/ddi.13797
• Stewart, P. S., Voskamp, A., Santini, L., Biber, M. F., Devenish, A. J., Hof, C., …Tobias, J. A. (2022). Global impacts of climate change on avian functional diversity. Ecology Letters, 25(3), 673-685. https://doi.org/10.1111/ele.13830
• Pearce-Higgins, J., Antão, L., Bates, R., Bowgen, K., Bradshaw, C., Duffield, S., …Morecroft, M. (2022). A framework for climate change adaptation indicators for the natural environment. Ecological Indicators, 136, Article 108690. https://doi.org/10.1016/j.ecolind.2022.108690
• Gibson, M. R., Runge, C. A., Stephens, P. A., Fuller, R. A., & Willis, S. G. (2022). Where nothing stands still: quantifying nomadism in Australian arid-zone birds. Landscape Ecology, 37(1), 191-208. https://doi.org/10.1007/s10980-021-01343-2
• Lawrence, K. B., Barlow, C. R., Bensusan, K., Perez, C., & Willis, S. G. (2022). Phenological trends in the pre‐ and post‐breeding migration of long‐distance migratory birds. Global Change Biology, 28(2), 375-389. https://doi.org/10.1111/gcb.15916
• Voskamp, A., Hof, C., Biber, M. F., Böhning-Gaese, K., Hickler, T., Niamir, A., …Fritz, S. A. (2022). Projected climate change impacts on the phylogenetic diversity of the world's terrestrial birds: more than species numbers. Proceedings of the Royal Society B: Biological Sciences, 289(1979), https://doi.org/10.1098/rspb.2021.2184
• Mason, T. H., Stephens, P. A., Gilbert, G., Green, R. E., Wilson, J. D., Jennings, K., …Willis, S. G. (2021). Using indices of species’ potential range to inform conservation status. Ecological Indicators, 123, https://doi.org/10.1016/j.ecolind.2021.107343
• Titley, M. A., Butchart, S. H., Jones, V. R., Whittingham, M. J., & Willis, S. G. (2021). Global inequities and political borders challenge nature conservation under climate change. Proceedings of the National Academy of Sciences, 118(7), Article e2011204118. https://doi.org/10.1073/pnas.2011204118
• Howard, C., Stephens, P., Pearce-Higgins, J., Gregory, R., Butchart, S., & Willis, S. (2020). Disentangling the relative roles of climate and land cover change in driving the long-term population trends of European migratory birds. Diversity and Distributions, 26(11), 1442-1455. https://doi.org/10.1111/ddi.13144
• Brooker, S. A., Stephens, P. A., Whittingham, M. J., & Willis, S. G. (2020). Automated detection and classification of birdsong: An ensemble approach. Ecological Indicators, 117, Article 106609. https://doi.org/10.1016/j.ecolind.2020.106609
• Bradfer-Lawrence, T., Bunnefeld, N., Gardner, N., Willis, S. G., & Dent, D. H. (2020). Rapid assessment of avian species richness and abundance using acoustic indices. Ecological Indicators, 115, Article 106400. https://doi.org/10.1016/j.ecolind.2020.106400
• Mason, L. R., Green, R. E., Howard, C., Stephens, P. A., Willis, S. G., Aunins, A., …Gregory, R. D. (2019). Population responses of bird populations to climate change on two continents vary with species’ ecological traits but not with direction of change in climate suitability. Climatic Change, 157(3-4), 337-354. https://doi.org/10.1007/s10584-019-02549-9
• Bradfer‐Lawrence, T., Gardner, N., Bunnefeld, L., Bunnefeld, N., Willis, S. G., & Dent, D. H. (2019). Guidelines for the use of acoustic indices in environmental research. Methods in Ecology and Evolution, 10(10), https://doi.org/10.1111/2041-210x.13254
• Littlewood, N. A., Mason, T. H., Hughes, M., Jacques, R., Whittingham, M. J., & Willis, S. G. (2019). The influence of different aspects of grouse moorland management on nontarget bird assemblages. Ecology and Evolution, https://doi.org/10.1002/ece3.5613
• Stephens, P., Vieira, M., Willis, S., & Carbone, C. (2019). The limits to population density in birds and mammals. Ecology Letters, 22(4), 654-663. https://doi.org/10.1111/ele.13227
• Hof, C., Voskamp, A., Biber, M. F., Böhning-Gaese, K., Engelhardt, E. K., Niamir, A., …Hickler, T. (2018). Bioenergy cropland expansion may offset positive effects of climate change mitigation for global vertebrate diversity. Proceedings of the National Academy of Sciences, 115(52), 13294-13299. https://doi.org/10.1073/pnas.1807745115
• Burgess, M. D., Smith, K. W., Evans, K. L., Leech, D., Pearce-Higgins, J. W., Branston, C. J., …Phillimore, A. B. (2018). Tritrophic phenological match-mismatch in space and time. Nature Ecology and Evolution, 2, 970-975. https://doi.org/10.1038/s41559-018-0543-1
• Howard, C., Stephens, P., Tobias, J., Sheard, C., Butchart, S., & Willis, S. (2018). Flight range, fuel load, and the impact of climate change on the journeys of migrant birds. Proceedings of the Royal Society B: Biological Sciences, 285(1873), Article 20172329. https://doi.org/10.1098/rspb.2017.2329
• Voskamp, A., Baker, D., Stephens, P., Valdes, P., & Willis, S. (2017). Global patterns in the divergence between phylogenetic diversity and species richness in terrestrial birds. Journal of Biogeography, 44(4), 709-721. https://doi.org/10.1111/jbi.12916
• Bagchi, R., Hole, D. G., Butchart, S. H., Collingham, Y. C., Fishpool, L. D., Plumptre, A. J., …Willis, S. G. (2016). Forecasting potential routes for movement of endemic birds among important sites for biodiversity in the Albertine Rift under projected climate change. Ecography, 41(2), 401-413. https://doi.org/10.1111/ecog.02712
• Baker, D. J., Hartley, A. J., Butchart, S. H., & Willis, S. G. (2016). Choice of baseline climate data impacts projected species’ responses to climate change. Global Change Biology, 22(7), 2392-2404. https://doi.org/10.1111/gcb.13273
• Sanderson, F., Pople, R., Leronymidou, C., Burfield, I., Gregory, R., Willis, S., …Donald, P. (2016). Assessing the performance of EU nature legislation in protecting target bird species in an era of climate change. Conservation Letters, 9(3), 172-180. https://doi.org/10.1111/conl.12196
• Stephens, P., Mason, L., Green, R., Gregory, R., Sauer, J., Alison, J., …Willis, S. (2016). Consistent response of bird populations to climate change on two continents. Science, 352(6281), 84-87. https://doi.org/10.1126/science.aac4858
• Howard, C., Stephens, P., Pearce-Higgins, J., Gregory, R., & Willis, S. (2015). The drivers of avian abundance: patterns in the relative importance of climate and land use. Global Ecology and Biogeography, 24(11), 1249-1260. https://doi.org/10.1111/geb.12377
• Palmer, G., Stephens, P., Ward, A., & Willis, S. (2015). Nationwide trophic cascades: changes in avian community structure driven by ungulates. Scientific Reports, 5, Article 15601. https://doi.org/10.1038/srep15601
• Willis, S., Foden, W., Baker, D., Belle, E., Burgess, N., Carr, J., …Butchart, S. (2015). Integrating climate change vulnerability assessments from species distribution modelling and traits based approaches. Biological Conservation, 190, 167-178. https://doi.org/10.1016/j.biocon.2015.05.001
• Baker, D., Hartley, A., Burgess, N., Butchart, S., Carr, J., Smith, R., …Willis, S. (2015). Assessing climate change impacts for vertebrate fauna across the West African protected area network using regionally appropriate climate projections. Diversity and Distributions, 21(9), 991-1003. https://doi.org/10.1111/ddi.12337
• Bassi, E., Willis, S., Passilongo, D., Mattioli, L., & Apollonio, M. (2015). Predicting the spatial distribution of wolf (Canis lupus) breeding areas in a mountainous region of central Italy. PLoS ONE, 10(6), Article e0124698. https://doi.org/10.1371/journal.pone.0124698
• Hindle, B., Kerr, C., Richards, S., & Willis, S. (2015). Topographical variation reduces phenological mismatch between a butterfly and its nectar source. Journal of Insect Conservation, 19(2), 227-236. https://doi.org/10.1007/s10841-014-9713-x
• Pacifici, M., Foden, W., Visconti, P., Watson, J., Butchart, S., Kovacs, K., …Rondinini, C. (2015). Assessing species vulnerability to climate change. Nature Climate Change, 5, 215-225. https://doi.org/10.1038/nclimate2448
• Mason, T., Stephens, P., Apollonio, M., & Willis, S. (2014). Predicting potential responses to future climate in an alpine ungulate: interspecific interactions exceed climate effects. Global Change Biology, 20(12), 3872-3882. https://doi.org/10.1111/gcb.12641
• Collingham, Y., Huntley, B., Altwegg, R., Barnard, P., Beveridge, O., Gregory, R., …Green, R. (2014). Prediction of mean adult survival rates of southern African birds from demographic and ecological covariates. Ibis: International Journal of Avian Science, 156(4), 741-754. https://doi.org/10.1111/ibi.12195
• Mason, T., Apollonio, M., Chirichella, R., Willis, S., & Stephens, P. (2014). Environmental change and long-term body mass declines in an alpine mammal. Frontiers in Zoology, 11, Article 69. https://doi.org/10.1186/s12983-014-0069-6
• Runge, C., Martin, T., Possingham, H., Willis, S., & Fuller, R. (2014). Conserving mobile species. Frontiers in Ecology and the Environment, 12(7), 395-402. https://doi.org/10.1890/130237
• Howard, C., Stephens, P. A., Pearce-Higgins, J. W., Gregory, R. D., & Willis, S. G. (2014). Improving species distribution models: the value of data on abundance. Methods in Ecology and Evolution, 5(6), 506-513. https://doi.org/10.1111/2041-210x.12184
• Bagchi, R., Crosby, M., Huntley, B., Hole, D., Butchart, S., Collingham, Y., …Willis, S. (2013). Evaluating the effectiveness of conservation site networks under climate change: accounting for uncertainty. Global Change Biology, 19(4), 1236-1248. https://doi.org/10.1111/gcb.12123
• Phipps, W., Willis, S., Wolter, K., & Naidoo, V. (2013). Foraging ranges of immature African white-backed vultures (Gyps africanus) and their use of protected areas in southern Africa. PLoS ONE, 8(1), Article e52813. https://doi.org/10.1371/journal.pone.0052813
• Davis, M., Stephens, P., Willis, S., Bassi, E., Marcon, A., Donaggio, E., …Apollonio, M. (2012). Prey Selection by an Apex Predator: The Importance of Sampling Uncertainty. PLoS ONE, 7(10), Article e47894. https://doi.org/10.1371/journal.pone.0047894
• Mason, T., Stephens, P., Willis, S., Chirichella, R., Apollonio, M., & Richards, S. (2012). Intraseasonal variation in reproductive effort: young males finish last. The American Naturalist, 180(6), 823-830. https://doi.org/10.1086/668082
• Pearce-Higgins, J., Bradbury, R., Chamberlain, D., Drewitt, A., Langston, R., & Willis, S. (2011). Targeting research to underpin climate change adaptation for birds
• Hole, D., Huntley, B., Arinaitwe, J., Butchart, S., Collingham, Y., Fishpool, L., …Willis, S. (2011). Towards a management framework for key biodiversity networks in the face of climatic change. Conservation Biology, 25(2), 305-315. https://doi.org/10.1111/j.1523-1739.2010.01633.x
• Mason, T., Chirichella, R., Richards, S., Stephens, P., Willis, S., & Apollonio, M. (2011). Contrasting life histories in neighbouring populations of a large mammal. PLoS ONE, 6(11), Article e28002. https://doi.org/10.1371/journal.pone.0028002
• Lindsay, S., Hole, D., Hutchinson, R., Richards, S., & Willis, S. (2010). Assessing the future threat from vivax malaria in the United Kingdom using two markedly different modelling approaches. Malaria Journal, 9, https://doi.org/10.1186/1475-2875-9-70
• Huntley, B., Barnard, P., Altwegg, R., Chambers, L., Coetzee, B., Gibson, L., …Willis, S. (2010). Beyond bioclimatic envelopes: Dynamic species’ range and abundance modelling in the context of climatic change. Ecography, 33(3), 621-626
• Gregory, R., Willis, S., Jiguet, F., Voříšek, P., Klvaňová, A., van Strien, A., …Green, R. (2009). An indicator of the impact of climatic change on European bird populations. PLoS ONE, 4(3), Article e4678. https://doi.org/10.1371/journal.pone.0004678
• Willis, S., Hill, J., Thomas, C., Roy, D., Fox, R., Blakeley, D., & Huntley, B. (2009). Assisted colonization in a changing climate: A test-study using two UK butterflies. Conservation Letters, 2(1), 46-52. https://doi.org/10.1111/j.1755-263x.2008.00043.x
• Willis, S., Thomas, C., Hill, J., Collingham, Y., Telfer, M., Fox, R., & Huntley, B. (2009). Dynamic distribution modelling: Predicting the present from the past. Ecography, 32, 5-12
• Hole, D., Willis, S., Pain, D., Fishpool, L., Butchart, S., Collingham, Y., …Huntley, B. (2009). Projected impacts of climate change on a continental-scale protected area network. Ecology Letters, 12(5), 420-431. https://doi.org/10.1111/j.1461-0248.2009.01297.x
• Doswald, N., Willis, S., Collingham, Y., Pain, D., Green, R., & Huntley, B. (2009). Potential impacts of climatic change on the breeding and non-breeding ranges and migration distance of European Sylvia warblers. Journal of Biogeography, 36(6), 1194-1208. https://doi.org/10.1111/j.1365-2699.2009.02086.x
• Huntley, B., Collingham, Y., Willis, S., & Green, R. (2008). Potential impacts of climatic change on European breeding birds. PLoS ONE, 3(1), Article e1439. https://doi.org/10.1371/journal.pone.0001439
• Willis, S., Hole, D., Collingham, Y., Hilton, G., Rahbek, C., & Huntley, B. (2008). Assessing the impacts of future climate change on protected area networks: A method to simulate individual species responses. Environmental Management, 43, 836-845
• Green, R., Collingham, Y., Willis, S., Gregory, R., Smith, K., & Huntley, B. (2008). Performance of climate envelope models in retrodicting recent changes in bird population size from observed climatic change. Biology Letters, 4, 599-602
• Willis, S., Collingham, Y., Hilton, G., Green, R., Rahbek, C., & Huntley, B. (2007). Will the African Important Bird Areas network remain viable under a changing climate?
• Lindsay, S., Hole, D., Hutchinson, R., & Willis, S. (2007). Future threat from vivax malaria in the United Kingdom. American Journal of Tropical Medicine and Hygiene, 77(5), 170-170
• Font, L., Nowell, G., Pearson, D., Ottley, C., & Willis, S. (2007). Sr isotope analysis of bird feathers by TIMS: a tool to trace bird migration paths and breeding sites. Journal of Analytical Atomic Spectrometry, 22(5), 513 - 522. https://doi.org/10.1039/b616328a
• Menendez, R., Gonzalez-Megias, A., Hill, J., Braschler, B., Willis, S., Collingham, Y., …Thomas, C. (2006). Species richness changes lag behind climate. Proceedings of the Royal Society B: Biological Sciences, 273, 1465-1470. https://doi.org/10.1098/rspb.2006.3484
• Huntley, B., Collingham, Y., Green, R., Hilton, G., Rahbek, C., & Willis, S. (2006). Potential impacts of climatic change upon geographical distributions of birds
• Willis, S., & Hulme, P. (2004). Environmental severity and variation in the reproductive traits of Impatiens glandulifera. Functional Ecology, 18(6), 887-898. https://doi.org/10.1111/j.0269-8463.2004.00907.x
• Huntley, B., Green, R., Collingham, Y., Hill, J., Willis, S., Bartlein, P., …Thomas, C. (2004). The performance of models relating species' geographical distributions to climate is independent of trophic level. Ecology Letters, 7(5), 417-426. https://doi.org/10.1111/j.1461-0248.2004.00598.x
• Hill, J., Thomas, C., Fox, R., Telfer, M., Willis, S., Asher, J., & Huntley, B. (2002). Responses of butterflies to twentieth century climate warming: implications for future ranges. Proceedings of the Royal Society B: Biological Sciences, 269(1505), 2163-2171. https://doi.org/10.1098/rspb.2002.2134
• Willis, S., & Hulme, P. (2002). Does temperature limit the invasion of Impatiens glandulifera and Heracleum mantegazzianum in the UK?. Functional Ecology, 16(4), 530-539. https://doi.org/10.1046/j.1365-2435.2002.00653.x
• Warren, M., Hill, J., Thomas, J., Asher, J., Fox, R., Huntley, B., …Thomas, C. (2001). Rapid responses of British butterflies to opposing forces of climate and habitat change. Nature, 414(6859), 65-69. https://doi.org/10.1038/35102054
• Wadsworth, R., Collingham, Y., Willis, S., Huntley, B., & Hulme, P. (2000). Simulating the spread and management of alien riparian weeds: are they out of control?. Journal of Applied Ecology, 37, 28-38
• Huntley, B., Baxter, R., Lewthwaite, K., Willis, S., & Adamson, J. (1998). Vegetation responses to local climatic changes induced by a water-storage reservoir. Global ecology and biogeography letters, 7(4), 241-257