Workshop on ocean acidification and fisheries, 25 April, 2010

PICES, ICES, and FAO are sponsoring a Symposium on Climate Change Effects on Fish and Fisheries in Sendai, Japan, on 26-29 April, 2010. Associated with this Symposium will be a workshop ‘W2’ on the ‘Potential Impacts of Ocean Acidification on Marine Ecosystems and Fisheries’ on 25 April, which will be a combination of contributed talks and discussion (see below).

Information on the Symposium, including registration for the Symposium and submission of abstracts for Workshop W2 (Deadline 14 December, 2009) can be found at the following link:

The aim of the workshop is to establish links between the ocean biogeochemical, ocean biology and fisheries research communities on the issue of the effects of ocean acidification / elevated carbon dioxide concentrations on ocean ecosystems and fisheries.

Again the deadline for abstract submission is 14 December 2009.

Ken Denman, Yukihiro Nojiri, and Hans Pörtner, Co-convenors


Workshop W2 (25 April 2010)
at the International Symposium on
“Climate Change Effects on Fish and Fisheries: Forecasting impacts, Assessing Ecosystem Responses, and Evaluating Management Strategies”
April 26-29, 2010, Sendai, Japan

1. Title
Potential Impacts of Ocean Acidification on Marine Ecosystems and Fisheries

2. Convenors
Kenneth Denman, Fisheries and Oceans Canada, Canadian Centre for Climate Modelling and Analysis, Victoria, Canada (
Yukihiro Nojiri, National Institute for Environmental Studies, Tsukuba, Japan (
Hans Pörtner, Alfred Wegener Institute for Polar and Marine Research, Bremerhaven, Germany (

3. Description and Objectives
The global ocean is being acidified as carbon dioxide from fossil fuel emissions enters its surface waters. The magnitude of this increase is directly related to the amount of carbon dioxide added, and more certain than many other changes related to climate change. Predicting the impacts of increasing acidification on marine ecosystems and fisheries is difficult due to the lack of knowledge of the ability of individual species and functional groups to adapt to increasing acidification, especially in combination with related effects associated with climate change such as increasing temperature, declining dissolved oxygen (Brewer and Peltzer, 2009), and stratification. Hence, potential effects cannot yet be represented in models of marine ecosystems. Potential impacts on commercial fisheries are significant: an analysis of 2007 US ‘at vessel’ fisheries value indicates 73% of the value is associated with calcium carbonate organisms and their direct predators (Cooley and Doney, 2009).

This workshop welcomes talks on manipulation experiments and observations on the effects of high acidity (low pH) caused by elevated carbon dioxide on organisms at all trophic levels of fisheries foodwebs, modelling approaches to predict the impact of continuing increases in atmospheric carbon dioxide, effects on marine biodiversity, and economic and social impacts on marine fisheries.

4. Anticipated Outcomes/Products
(e.g. manuscripts, white papers, forecasts, at least workshop report)

White paper and/or workshop report, and article for PICES Press

5. References
Brewer, P. G., and E. T. Peltzer, 2009. Limits to marine life. Science, 324, 347-348.
Cooley, S. R., and S. C. Doney. 2009. Anticipating ocean acidification’s economic consequences for commercial fisheries. Environ. Res. Lett. 4, 024007 (8pp) doi: 10.1088/1748-9326/4/2/024007.

Please e-mail your suggestions to
PICES Secretariat (

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