VULNERABILITY AND ADAPTATION TO CLIMATE CHANGE FOR AQUACULTURE AND INLAND FISHERIES IN THE COASTAL ZONE

Patrick White
Abstract : Climate change is already affecting aquaculture production through changes in seasonality of weather patterns, increasing sea levels, warming and increased extreme events leading to unpredictable production. Most aquaculture is undertaken either in freshwater or in the marine coastal fringe by small scale producers in Asia which makes aquaculture very susceptible to climate change. Unlike most terrestrial animals, all cultured aquatic species are poikilothermic, meaning their body temperatures vary with the ambient temperature. Therefore climate change-induced temperature variations will have a much stronger impact aquaculture activities and on their productivity and yields. Increased temperatures will affect fish physiological processes resulting in both positive and negative effects on fisheries and aquaculture systems. Small scale aquaculture producers in Asia are already noting changes in the intensity, frequency and seasonality of climate patterns (e.g. early/late rains) and extreme events (e.g. floods, droughts, storms). Sea level rise and increasing tidal fluctuation in some area is leading to saline intrusion of freshwater areas, and together with storm surge coastal erosion and is causing damage to marine and brackish water pond culture systems. Freshwater acidification has already been felt from acid rain and increasing ocean acidification will have consequences on shellfish and crustacean production. Changes in precipitation, groundwater and river flows will significantly affect freshwater aquaculture production. Climate change is already affecting the seasonality of particular biological processes, radically altering marine and freshwater food webs, with unpredictable consequences for wild fisheries which aquaculture is particularly dependant on for production of fishmeal and fish oil and for capture based aquaculture. Small scale aquaculture producers are vulnerable to these changes and although these communities have adapted to change throughout history, projected climate change add multiple additional risks to communities dependant on aquatic resources that might limit the effectiveness of past adaptive strategies. There is a need for new adaptation strategies that are context and location specific and which consider impacts both short-term (e.g. increased frequency of severe events) and long-term (e.g. reduced productivity of aquatic ecosystems).
Type de document :
Communication dans un congrès
ClimECO2 International Summer School - Oceans, Marine Ecosystems, and Society facing Climate Change, Aug 2010, Brest, France
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http://hal.univ-brest.fr/hal-00502939
Contributeur : Ivo Grigorov <>
Soumis le : vendredi 16 juillet 2010 - 10:37:39
Dernière modification le : vendredi 16 juillet 2010 - 10:37:39

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  • HAL Id : hal-00502939, version 1

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Patrick White. VULNERABILITY AND ADAPTATION TO CLIMATE CHANGE FOR AQUACULTURE AND INLAND FISHERIES IN THE COASTAL ZONE. ClimECO2 International Summer School - Oceans, Marine Ecosystems, and Society facing Climate Change, Aug 2010, Brest, France. 〈hal-00502939〉

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