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Research in our lab focuses on the ecology and management of freshwater and coastal biological resources. We combine ecological research with integrated resource systems studies, and often engage directly with management processes (see also the Action Page). Our principal tools are mathematical modelling, observational and experimental field studies, and participatory research and planning approaches. Most of our work is concerned with tropical ecosystems that are intensively managed for production or conservation purposes. We currently work on the following themes:
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Integrative science for aquatic resource management: Effective management of aquatic resources often requires a combination of different technical measures (e.g. harvest regulation, habitat management and hatchery enhancement), integration of biological/technical with social/economic considerations, and reciprocal links between research and management. Our research interests cover many of these ingredients, as well as integrative concepts, tools and processes that allow scientists and management stakeholders to ‘put the pieces together’.
Lorenzen, K. (2008) Understanding and managing enhancement fisheries systems. Reviews in Fisheries Science 16: 10-23. PDF
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Population biology of fish and fish diseases: Our research in population biology aims to provide robust models for processes that are central to resource management. This includes size and density-dependent processes in fish populations and the evolutionary ecology of domestication. We also work on the population dynamics of fish diseases.
Lorenzen, K. & Enberg, K. (2002) Density-dependent growth as a key mechanism in the regulation of fish populations: evidence from among-population comparisons. Proceedings of the Royal Society of London Series B 269: 49-54. PDF
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Aquaculture-based fisheries enhancement and restoration: Cultured fish are widely used in the enhancement and restoration of fish populations. We develop population dynamics theory and practical assessment methods and tools (EnhanceFish) for aquaculture-based fisheries and supportive breeding programmes.
Lorenzen, K. (2005) Population dynamics and potential of fisheries stock enhancement: practical theory for assessment and policy analysis. Philosophical Transactions of the Royal Society of London Series B 260: 171-189. PDF
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Conservation of natural aquatic resources: Freshwater and coastal biological resources are highly diverse and support productive fisheries, but are threatened by intensive harvesting, habitat modification and exotic species. We have carried out extensive field studies in the Mekong and Amazon regions to assess such impacts and devise conservation measures.
Nguyen Khoa, S., Lorenzen, K., Garaway, C.J., Chamsinhg, B., Siebert, D. & Randone, M. (2005) Impacts of irrigation on fisheries in rain-fed rice-farming landscapes. Journal of Applied Ecology 42: 892-900. PDF
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Sustainable aquaculture systems: Nutrient dynamics is a key factor in resource use efficiency and environmental impacts of aquaculture systems. Using mathematical phytoplankton models we study nitrogen dynamics and recovery options in intensive pond systems. In a related study, we have developed a typology of Asian carp farming systems with respect to their resource use efficiency.
Burford, M.A. & Lorenzen, K. (2004) Modelling nitrogen dynamics in intensive aquaculture ponds: the role of sediment remineralization. Aquaculture 229: 129-145. PDF
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Institutional, social and economic issues: Improving the management of aquatic resources requires an understanding of institutional arrangements and the social and economic context of management. Many of our projects combine institutional analysis, bio-economic modelling and livelihoods assessments with ecological research. Currently we explore using agent- based modelling in the evaluation of management options for small-scale fisheries.
Smith, L.E.D., Nguyen Khoa, S. & Lorenzen, K. (2005) Livelihood functions of inland fisheries: policy implications in developing countries. Water Policy 7: 359-383 PDF
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Dr Juliane Struve
Daphne Jackson Fellow
Research interests
CV
Fellowship research
Publications
Contact
Research Interests
Aquatic environmental science.
CV
Education
2001: PhD Environmental Engineering, University of Wales Cardiff
2006: MSc Environmental Engineering, Imperial College
2004: MSc Biological Oceanography, Kiel University
Employment
2001-present: Daphne Jackson Fellow, Imperial College London
2002-2004: Contracted specialist consultant with HR Wallingford Ltd,UK
2001-2002: Senior Environmental Scientist with HR Wallingford Ltd.,UK
1999-2001: Senior Water Quality Planner, Environment Agency, UK
1997-2001: Research Assistant at the University of Wales, Cardiff,UK
Fellowship research
Spatial modelling of fish population dynamics
I am developing spatial models of fish movement and population dynamics.
Publications
Struve, J., Falconer, R.A. and Wu, Y.(2003): Experimental studies and modelling of the effect of mangrove vegetation on hydrodynamic processes. Estuarine and Coastal Shelf Science 58 163-171.
Struve, J. and Falconer, RA. (2001): A review of Hydrodynamic and Water Quality Processes in Mangrove Regions. Journal of Coastal Research 27.
Wu, Y., Falconer, RA. and Struve, J. (200l): Mathematical modelling of tidal currents in mangrove forests, pp. 19 29. Environmental Modelling and Sqftware 16(1).
Lorenzen, K., Struve, J. and Cowan, V. (1997): Impact of stocking density and water management on nitrogen dynamics in intensive pond culture: A mathematical model applied to Thai commercial shrimp farms. Aquaculture Research Vol. 28: 493-507.
Contact
Dr Juliane Struve
Division of Biology
Imperial College London
Silwood Park Campus
Buckhurst Road
Ascot, Berkshire
SL5 7PY
E-mail: j.struve@imperial.ac.uk
Tel: +44 (0) 20 7594 2527
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