Dr Julia Blanchard

Julia Blanchard Room E210, Alfred Denny Building
Tel. +44 (0)144 222 0029
Fax: +44 (0)144 222 0002
Email: julia.blanchard@sheffield.ac.uk

Research website

Career

BSc (Hons) (1998), MSc (2000) Dalhousie University and Bedford Institute of Oceanography
PhD (2008) University of York
Research Scientist (2001-2008) and Senior Research Scientist (2008-2010) Centre for Environment, Fisheries and Aquaculture Sciences (Cefas)
Visiting Researcher (2009-2010) NERC Centre for Population Biology, Imperial College London
Research Fellow (2010-2011) Imperial College London
Lecturer (2011- present) University of Sheffield

Professional Activities

Honorary Research Fellow, Imperial College London (2011-present)
Council and Committee Member, British Ecological Society (2011-present)
Member of the Fisheries Society of the British Isles and the Ecological Society of America
IUCN Commission on Ecosystem Management Member
International Council for the Exploration of the Seas, Expert Working Group Member
Task Group Leader for the EUR-OCEANS Indicators Working Group - IndiSEAS
Co-Initiator and Programme Coordinator of ESF Network on Body size and Ecosystem Dynamics - SIZEMIC (2007-2011)

Research Interests

My research seeks to understand how marine ecosystems work and respond to environmental change and human pressures, mostly from regional to global scales. This includes using a range of theoretical and empirical approaches from population, community, macro- ecology. I am also interested in interdisciplinary research to address issues in marine science, conservation and fisheries management, with the overarching goal of improving sustainability in the world’s oceans.
Current research topics include:

Factors influencing the resilience of fish populations, marine communities and ecosystems (from shelf seas to deep seas)
Effects of climate change on marine ecosystems and global fisheries (historical data analyses and modelling future scenarios)
Development of robust methods to support an ecosystem approach to fisheries management (ecological models and indicators)

Teaching

Tutorials for Levels 1 and 2
Supervisor on dissertations and projects at Levels 3 and 4
Lecturer on Issues in Conservation APS329
Lecturer on Level 2 Population and Community Ecology APS273
Current Research Group

Research Students

Samiya Selim
Shifting baselines in coastal ecosystem service provision. (NERC-CASE funded, jointly supervised with Dr Tom Webb & Dr Phil Warren)

Alex Tidd
Management implications of fisher behaviour and fleet dynamics in the North Sea. (Cefas-funded, jointly supervised with Prof E.J. Milner-Gulland, based at Imperial College London/Cefas)

Mariella Canales
Development of size-based methods to support ecosystem-based fisheries management in Chile. (Chilean government and York-funded, jointly supervised with Prof Richard Law, based at University of York)

Recent Publications

Shin, Y.-J., Bundy, A., Shannon, L. J., Blanchard, J. L., Chuenpagdee, R., Coll, M., Knight, B., Lynam, C., Piet, G. & Richardson, A. J. 2012. Global in scope and regionally rich: an IndiSeas workshop helps shape the future of marine ecosystem indicators. Reviews in Fish Biology and Fisheries. DOI 10.1007/s11160-012-9252-z

Castle, M.D., Blanchard, J.L., and Jennings, S. 2011. Predicted effects of behavioural movement and passive transport on individual growth and community size structure in marine ecosystems. Advances in Ecological Research. 45, 41–66.

Simpson, S.D., Jennings, S., Johnson, M.P., Blanchard, J.L., Schon, P-J, Sims, D.W. & Genner, M.J. 2011. Continental Shelf-Wide Response of a Fish Assemblage to Rapid Warming of the Sea. Current Biology 21(18): 1565-1570.

Blanchard, J.L. Body size and ecosystem dynamics: an introduction. 2011. OIKOS. 120(4):481-482 (Editorial)

Yvon-Durocher G., Reiss J, Blanchard J.L., Ebenman B,. Perkins D., Reuman D.C., Thierry A., Woodward G & Petchey O.L. 2011. Across ecosystem comparisons of size structure: methods, approaches, and prospects. OIKOS. 120(4):550-563.

Woodward G., Blanchard J.L., Lauridsen R., Edwards F.K., Jones J.I., Figueroa D., Warren P., Petchey O.L. 2010. Individual-based food webs: species identity, body size and sampling effects. Advances in Ecological Research 43: 211-266.

Woodward, G, Benstead JP, Beveridge OS, Blanchard JL, Brey T, Brown L, Cross WF, Friberg N, Ings TC, Jacob U, Jennings S, Ledger ME, Milner AM, Montoya JM, Pichler DE, O’Gorman E, Petchey OL, Olesen JM, Reuman DC, Thompson MS, Van Veen FJF, Yvon-Durocher G. 2010. Ecological networks in a changing climate. Advances in Ecological Research. 42: 71-138.

Milner-Gulland, E.J., Arroyo, B., Bellard, C., Blanchard, J.L., Bunnefeld, N., Delibes-Mateos, M., Edwards, C.T.T., Nuno, A. , Palazy, L. Reljic, S., Riera, P., Skrbinsek, T. 2010. New directions in Management Strategy Evaluation through cross-fertilisation between fisheries science and terrestrial conservation. (Meeting Report). Biology Letters. 6(6):719:722 doi: 10.1098/rsbl.2010.0588. (Meeting Report)

Struve, J., Lorenzen, K., Blanchard, J.L., Börger, L., Bunnefeld, N., Edwards, C., Hortal, J., MacCall, A., Matthiopoulos, J., Van Moorter, B., Ozgul, A., Royer, F., Singh, N., Yesson, C. & Bernard, R. 2010. Lost in space? Searching for directions in the spatial modelling of individuals, populations and species ranges. Biology Letters. 6(5) 575-578. doi: 10.1098/rsbl.2010.0338. (Meeting Report)

Blanchard, J.L., Law, R. ,Castle, M.D. & S. Jennings. 2010. Coupled energy pathways and the resilience of size-structured food webs. Theoretical Ecology. doi: 10.1007/s12080010-0078-9

Blanchard, J.L., Coll, M., Trenkel, V.M., Vergnon, R., Yemane, D., Jouffre, D., Link, J. & Y. Jai-Shin. 2010. Trend analysis of indicators: a comparison of recent changes in the status of marine ecosystems around the world. ICES Journal of Marine Science. 67: 732–744.

Shin, Y-J., Shannon, L. J., Bundy, A., Coll, M., Aydin, K., Bez, N., Blanchard, J.L., Borges, M. F., Diallo, I., Diaz, E., Heymans, J. J., Hill, L., Johannesen, E., Jouffre, D., Kifani, S., Labrosse, P., Link, J. S., Mackinson, S., Masski, H., Mo¨llmann, C., Neira, S., Ojaveer, H., ould Mohammed Abdallahi, K., Perry, I.,Thiao, D., Yemane, D., and Cury, P. M. 2010. Using indicators for evaluating, comparing, and communicating the ecological status of exploited marine ecosystems. 2. Setting the scene. ICES Journal of Marine Science, 67: 692–716.

Blanchard, J.L., Jennings, S., Law, R., Castle, M.D., McCloghrie P.,Rochet, M.J. & E. Benoît. 2009. How does abundance scale with body size in coupled size-structured food webs? Journal of Animal Ecology. 78: 270–280.

Law, R., Plank, M.J., James, A. & Blanchard, J.L. 2009. Size-spectra dynamics from stochastic predation and growth of individuals. Ecology. 90(3):802-811.

Blanchard, J.L., Maxwell, D. L. & S. Jennings. 2008. Power of monitoring surveys to detect abundance trends in depleted populations: the effects of density-dependent habitat use, patchiness, and climate change. ICES Journal of Marine Science, 65: 111–120.

Jennings, S., Mélin, F., Blanchard, J. L., Forster, R.M., Dulvy, N.K. & R.W. Wilson. 2008. Global biomass and production of marine fish and other animals. Proceedings of the Royal Society B. 275, 1375–1383.

Engelhard, G.H., van der Kooij, J., Bell, E.D., Pinnegar, J.K., Blanchard, J.L., Mackinson, S. & D.A. Righton. 2008. Contrasting 'fishing' and 'natural' predation on diurnally migrating sandeels Ammodytes marinus. Marine Ecology Progress Series. 369:205-212.

Brose, U., Jonsson T, Berlos E.L., Warren P., Banasek-Richter C., Bersier L.-F., Blanchard, J.L., Brey T., Carpenter S.R., Cattin Blandenier M.-F., Cushing L., Dawah H.A., Dell T., Edwards F., Harper-Smith S., Jacob U., Ledger M.E., Martinez N.D., Memmott J., Mintenbeck K., Pinnegar J.K., Rall B.C., Rayner T.S., Reuman D. C., Ruess L., Ulirich W., Williams R.J., Woodward G., and J.E. Cohen. 2006. Consumer-resource body size relationships in natural food webs. Ecology, 87:2411-2417.

Pinnegar, J.K. , Blanchard, J.L., Mackinson, S., Scott, R.D. & D.E. Duplisea 2005. Aggregation and removal of weak-links in food-web models: system stability and recovery from disturbance. Ecological Modelling, 184(2-4): 229-248.

Brose, U., Berlow E.L., Jonsson T., Banasek-Richter C., Bersier L.-F., Blanchard J.L., Brey T., Carpenter S.R., Cattin Blandenier M.-F., Cohen J.E., Cushing L., Dawah H.A., Dell T., Edwards F., Harper-Smith S., Jacob U., Jnapp R.A., Ledger M.E., Memmott J., Tintenbeck K., Pinnegar J.K., Rall B.C., Rayner T., Ruess L., Ulrich W., Warren P., Williams R.J.,. Woodward G, Yodzis P., & Martinez, N.D. 2005. Body sizes of consumers and their resources. Ecology 86:2545, Ecological Archives EO86-135.

Blanchard, J. L., Dulvy, N. K., Jennings, S., Ellis, J. R., Pinnegar, J. K., Tidd, A., and Kell, L. T. 2005. Do climate and fishing influence size-based indicators of Celtic Sea fish community structure? ICES Journal of Marine Science, 62: 405-411.

Blanchard, J.L. , Mills, C., Jennings, S., Fox, C.J., Rackham, B.D., Eastwood, P. & C.M. O’Brien. 2005. Distribution-abundance relationships for North Sea cod: observation versus theory. Canadian Journal of Fisheries and Aquatic Sciences, 62: 2001-2009.

*Jennings, S. & Blanchard, J.L. 2004. Fish abundance with no fishing: predictions based on macroecological theory. Journal of Animal Ecology, 73(4): 632-642. *Science/AAAS| Editors Choice: 09 July 2004; 305(5681)

Mackinson, S., Blanchard, J.L., Pinnegar, J.K. & R. Scott. 2003. Consequences of alternative functional response formulations in models exploring whale-fishery interactions. Marine Mammal Science, 19(4): 661-681.

Blanchard, J.L., Frank, K.T. & J.E. Simon. 2003. Effects of Condition on fecundity and total egg production of eastern Scotian Shelf haddock (Melanogrammus aeglefinus). Canadian Journal of Fisheries and Aquatic Sciences, 60 (3) 321-332.

Marshall, T., O'Brien, L., Tomkiewicz, J., Marteinsdóttir,G., Morgan, M.J., Saborido-Rey, F., Köster, F., Blanchard, J.L., Secor, D., Kraus, G., Wright, P.,N.V. Mukhina and Björnsson, H. 2003. Developing alternative indices of reproductive potential into fisheries management: case studies for stocks spanning an information gradient. Journal of Northwest Atlantic Fisheries Science, 33:161-190.
Book Chapters:
Jennings, S., Andersen K.H. & Blanchard J.L. 2011. “Marine ecology and fisheries” In: Metabolic Ecology: a scaling approach. (Eds. Brown, Kodric-Brown & Sibly). (In press)

Barange ,M., Allen, I., Allison, E., Badjeck, M.C., Blanchard, J.L., Drakeford, B., Dulvy, N.K., Harle, J. , Holmes,R. Holt, J.,Jennings, S., Lowe, J., Merino,G, Mullon, C., Pilling, G., Tompkins, E.,Werner, F. 2010. “Predicting the impacts and socio-economic consequences of climate change on global marine ecosystems and fisheries: the QUEST_Fish framework” In: World Fisheries: a social-ecological analysis. Ommer et al. (Eds). Wiley Publishing.

Pinnegar, J.K., Trenkel V.M. & Blanchard, J.L. 2008. “80 years of multispecies fisheries modelling – has it helped or further muddied the waters?” In: Advances in Fisheries Science: 50 Years After Beverton and Holt (Eds. Payne, A., Cotter, J. & T. Potter). Wiley-Blackwell Publishing Ltd, 568 pp.