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Impacts of aquaculture on surrounding sediments: generation of organic-rich sediments
Holmer, M. (1992). Impacts of aquaculture on surrounding sediments: generation of organic-rich sediments, in: De Pauw, N. et al. (Ed.) Aquaculture and the Environment: reviews of the International Conference Aquaculture Europe '91, Dublin, Ireland, June 10-12, 1991. EAS Special Publication, 16: pp. 155-175
In: De Pauw, N.; Joyce, J. (Ed.) (1992). Aquaculture and the Environment: Reviews of the International Conference Aquaculture Europe '91, Dublin, Ireland, June 10-12, 1991. Special Publication European Aquaculture Society, 16. European Aquaculture Society: Gent. ISBN 90-71625-10-9. 536 pp., more
In: Special Publication European Aquaculture Society. European Aquaculture Society: Bredene. ISSN 0774-0689, more
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Keyword
    Marine/Coastal
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  • Holmer, M.
Abstract
    Fish farming generates large amounts of particulate organic waste products, and surrounding sediments are affected by this surplus of organic matter. The extent of impacts is determined from the quantity and quality of the input and environmental conditions at the location. The affected area is often limited to the immediate vicinity of the farm. Development of organic-rich sediments results in changes in benthic fauna community structure towards impoverished fauna populations and the decomposition of organic matter becomes more dependent on microbial activity. Fish farm sediments are reduced and anaerobic mineralization processes are very important. The cycling of nutrients and other elements is rapid, and the efflux from these sediments to the water column is high. The natural seasonal cycling of elements is disturbed. Use of antibiotics against diseases in the farms has developed resistant bacteria in the sediments and the microbial activity is reduced for a long time after medication. Surrounding sediments are subject to significant alterations due to fish farming.
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