Will Hentley
Current research interests
PhD studentship Supervised by Dr Tom Shepherd, The James Hutton Institute, Dr Scott Johnson, University of Western Sydney, Dr Adam Vanbergen and Professor Rosie Hails at CEH and Dr Hefin Jones at Cardiff University
Trophic cascades in a changing climate – Effects of elevated CO2 on the breakdown of plant defences.
Carbon dioxide emissions from anthropogenic sources have increased in the atmosphere since the industrial revolution. Atmospheric CO2 concentrations are predicted to rise from the current 350ppm to 550ppm by 2050.
Initial evidence suggests plants will benefit from the fertilising effect of elevated levels of CO2 (eCO2), with plant productivity in C3 plants predicted to increase by 10-20%. However, recent evidence suggests increases in productivity may be counteracted by CO2-induced changes to plant defences against herbivory.
It is currently unknown how changes to plant defences will cascade to higher trophic levels within a community. How will eCO2-induced changes to plant defences affect herbivore performance? How will these alterations affect interactions with higher trophic levels? Will predatory species abundance increase in response to increased prey availability, suppressing any change to herbivore populations, or will eCO2-induced reduction of plant defences prevent this?
My PhD will aim to provide answers to these questions by using the red raspberry, Rubus ideaus and the large raspberry aphid Amphorophora idaei as a model plant-herbivore system. I will investigate the effect of eCO2 on higher trophic levels by using a specialist predator, a parasitoid wasp, Aphidius ervi, and a generalist predator, the harlequin ladybird, Harmonia axyridis.
Past research
I completed a BSc in Zoology at Sheffield University and an MSc in Biodiversity and Conservation at Leeds University. Before starting my MSc I worked for 18 months as a research assistant for Dr Andrew Beckerman at Sheffield University. Here I investigated the indirect effects of predation on the life history, morphology and behavioural characteristics of Daphnia pulex.
Bibliography
- Hentley, W.T.; Vanbergen, A.J.; Beckerman, A.P.; Brien, M.N.; Hails, R.S.; Jones, T.H.; Johnson, S.N. (2016) Antagonistic interactions between an invasive alien and a native coccinellid species may promote coexistence., Journal of Animal Ecology, 85, 1087-1097.
- Hentley, W.T.; Hails, R.S.; Johnson, S.N.; Jones, T.H.; Vanbergen, A.J. (2014) Top-down control by Harmonia axyridis mitigates the impact of elevated atmospheric CO2 on a plant-aphid interaction., Agricultural and Forest Entomology, 16, 350-358.
- Hentley, W.T.; Vanbergen, A.J.; Hails, R.S.; Jones, T.H.; Johnson, S.N. (2014) Elevated atmospheric CO2 impairs aphid escape responses to predators and conspecific alarm signals., Journal of Chemical Ecology, 40, 1110-1114.
- McKenzie, S.W.; Hentley, W.T.; Hails, R.S.; Jones, T.H.; Vanbergen, A.J.; Johnson, S.N. (2013) Global climate change and above-belowground insect herbivore interactions., Frontiers in Plant Science, 4, 412.
- Hentley, W.T.; Vanbergen, A.J.; Beckerman, A.P.; Brien, M.N.; Hails, R.S.; Jones, T.H.; Johnson, S.N. (2016) Antagonistic interactions between an invasive alien and a native coccinellid species may promote coexistence., Journal of Animal Ecology, 85, 1087-1097.
- Hentley, W.T.; Hails, R.S.; Johnson, S.N.; Jones, T.H.; Vanbergen, A.J. (2014) Top-down control by Harmonia axyridis mitigates the impact of elevated atmospheric CO2 on a plant-aphid interaction., Agricultural and Forest Entomology, 16, 350-358.
- Hentley, W.T.; Vanbergen, A.J.; Hails, R.S.; Jones, T.H.; Johnson, S.N. (2014) Elevated atmospheric CO2 impairs aphid escape responses to predators and conspecific alarm signals., Journal of Chemical Ecology, 40, 1110-1114.
- McKenzie, S.W.; Hentley, W.T.; Hails, R.S.; Jones, T.H.; Vanbergen, A.J.; Johnson, S.N. (2013) Global climate change and above-belowground insect herbivore interactions., Frontiers in Plant Science, 4, 412.
- Hentley, W.T.; Vanbergen, A.J.; Jones, T.H.; Hails, R.S.; Johnson, S.N. (2011) Trophic cascades in a changing environment: effect of elevated CO2 on the breakdown of plant defence and its cascading effect to higher trophic levels., British Ecological Society Annual Meeting 2011, University of Sheffield, 12-14 September 2011. (Poster)