Toxic Cyanobacteria (blue-green algae)
My original research area was primarily concerned with computer simulation of the growth and movement of problem cyanobacterial blooms and strategies for their management. I was lucky to work with colleagues such as Colin Reynolds at the Institute of Freshwater Ecology in Windermere and mentors Pauline Kneale, Mike Kirkby and Adrian McDonald at Leeds. My PhD students including Basak Guven and Mark Easthope carried this work forward and have excelled in their own careers.
Selected publications
2012 Howard, A. Toxic Cyanobacteria in Bengstsson, L., Herschy, R. and Fairbridge, R. (eds) Encyclopedia of Lakes and Reservoirs. Springer. ISBN 9781402056161.
2011 Guven, B. and Howard, A. Sensitivity analysis of a cyanobacterial growth and movement model under two different flow regimes, Environmental Modeling and Assessment. 16:577-589.
2007 Guven, B. and Howard, A. Identifying the critical parameters of a cyanobacterial growth and movement model by using generalised sensitivity analysis Ecological Modelling, 207, 11-21.
2007 Guven, B. and Howard, A. Modelling the growth and movement of cyanobacteria in river systems Science of the Total Environment, 368, 898-908.
2006 Guven, B. and Howard, A. A review and classification of the existing models of cyanobacteria Progress in Physical Geography, 30, 1-24.
2003 Burton, L.R. Howard, A. & Goodall, B. Construction of a historical Water Pollution Index for the Mersey Basin, Area, 35:4.
2002 Howard, A. & Easthope, M.P. Application of a model to predict cyanobacterial growth patterns in response to climatic change at Farmoor Reservoir, Oxfordshire, UK, The Science of the Total Environment, 282-283, 459-469.
2001 Howard, A. Modelling movement patterns of the cyanobacterium, Microcystis, Ecological Applications: the journal of the Ecological Society of America, 11, 304-310.
1999 Howard, A. Algal Modelling: Processes and Management: An Introduction, Hydrobiologia, 414, 35-37
1999 Howard, A. (ed) Algal Modelling: Processes & Management, Hydrobiologia, 414.
1999 Easthope, M.P. & Howard, A. Modelling algal dynamics in a lowland impoundment, Science of the Total Environment. 241, 17-25.
1999 Easthope, M.P. & Howard, A. Implementation and sensitivity analysis of a model of cyanobacterial movement and growth, Hydrobiologia, 414, 53-58.

1997 Whitehead, P.G. Howard, A. & Arulmani, C. Modelling algal growth and transport in rivers: a comparison of time series analysis, dynamic mass balance, and neural network techniques, Hydrobiologia, 347: 39-46.
1997 Kneale, P.E. & Howard, A. Statistical analysis of algal and water quality data, Hydrobiologia, 347: 59-63.
1997 Howard, A. Computer simulation modelling of buoyancy change in Microcystis, Hydrobiologia, 349: 111-117.
1997 Howard, A. Algal Modelling: Processes & Management. Editorial Preface. Hydrobiologia, 349:vii-ix.
1996 Howard, A. McDonald, A.T. Kneale, P.E. & Whitehead, P.G. Cyanobacterial (blue-green algal) blooms in the UK: A review of the current situation and potential management options, Progress in Physical Geography, 20, 63-81.
1996 Howard, A. Irish, A.E. & Reynolds, C.S. SCUM ’96: A new simulation of cyanobacterial underwater movement, Journal of Plankton Research, 18, 1375-1385.
1995 Howard, A. Kirkby, M.J., Kneale, P.E. & McDonald, A.T. Modelling the growth of cyanobacteria (GrowSCUM), Hydrological Processes, 9, 809-820.
1994 Howard, A. Problem cyanobacterial blooms – explanation and simulation modelling, Transactions of the Institute of British Geographers, 19, 213-224.
1993 Howard, A. SCUM – simulation of cyanobacterial underwater movement, Computer Applications in the Biosciences, 9, 413-419.

- By the beginning of June this year, approximately 38 million tons of Sargassum drifted towards the coasts of the Caribbean islands, the Gulf of Mexico, and northern South America, marking a negative record. Especially during the summer months, the brown algae accumulate on beaches, decomposing and emitting a foul odor. This not only repels tourists […]
- Researchers at McGill University have identified bacteria that can indicate whether a blue-green algae (cyanobacteria) bloom is likely to be toxic, offering a potential water-safety early warning system. Blooms are becoming more frequent due to climate change, according to previous McGill research. They can produce various contaminants, known as cyanotoxins, that pose serious health risks […]
- Australian researchers have created tiny compartments to help supercharge photosynthesis, potentially boosting wheat and rice yields while slashing water and nitrogen use.
- Salt is an essential nutrient for the human body. But hundreds of millions of years before the first humans, salt minerals once shaped entire landscapes. They even determined where early life on Earth could thrive.
- Natural products derived from microorganisms are a promising source of new active ingredients, but are often produced only in very small quantities. A research team from the Helmholtz Institute for Pharmaceutical Research Saarland (HIPS) led by Tobias Gulder has now succeeded in establishing a chemo-enzymatic platform for the production of furanolides—a class of natural products […]
- The shrinking sea ice in the Arctic Ocean is, overall, a disaster. But paradoxically, the melting of the ice can also fuel the engine of the Arctic food chains: algae.
- Under the lead of the Leibniz Institute for Baltic Sea Research Warnemünde (IOW), a review article outlined the state of the Baltic Sea coast and its expected development as a result of climate change. The article shows that the Baltic Sea can serve as a model for the consequences of climate change and that interdisciplinary […]
- The appearance of oxygen in Earth's atmosphere was a turning point in the history of our planet, forever transforming the environment and setting the stage for complex life. This event, known as the Great Oxidation Event (GOE), occurred roughly 2.1 to 2.4 billion years ago.
- Long before plants and algae, cyanobacteria were already performing photosynthesis—filling Earth's skies with oxygen and setting the stage for life as we know it. The ultra-prevalent bacteria are critical to the global carbon cycle, responsible for fixing as much as 30% of the world's carbon dioxide and converting it into oxygen we breathe. And because […]
- One of the most heartbreaking occurrences for nature lovers is to discover a beached marine mammal such as a dolphin or whale. If the animal is still alive, marine biologists assisted by citizen volunteers try to protect the beached marine mammal from sun exposure and skin desiccation by pouring buckets of sea water on them […]

