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Anne Hollowed was an invited speaker at the Green Technology Forum of Ocean Strategy on Climate Change, 7 March 2014 in Seoul, Korea.  Highlights of Anne’s talk were that climate change is expected to impact the physics, chemistry, and lower trophic level production of the Bering Sea and Arctic Ocean.  These changes will impact the distribution, phenology, and abundance of commercial fish and crabs in the Bering Sea and Arctic Ocean through direct and indirect pathways. She compared the mechanisms through which climate change is expected to alter the fish and crab populations in the Bering Sea and Arctic Ocean.  Results from qualitative and quantitative modeling approaches were considered.  She discussed the challenges that climate change presents for sustainable management of living marine resources in high latitude regions and introduced a framework for adjusting current harvest strategies to accommodate for projected climate change impacts on marine species.

Bering Sea Open Science Meeting

Anne Hollowed gave an oral presentation at the Bering Sea Project Open Science Meeting in Honolulu, Hawaii, 23 February 2014.  Her talk, titled “Fish distribution and ocean conditions,”   summarized the key findings of the Fish Component of the Bering Sea Project and highlighted the research of the following investigators: Anne B. Hollowed, Matt Baker, Steve Barbeaux, Troy Buckley, Lorenzo Ciannelli, Edward D. Cokelet, John Horne, Stan Kotwicki, Robert R. Lauth, Sandra Parker-Stetter, and Patrick H. Ressler. Investigators designed, tested and implemented innovative new methods to collect oceanographic and biological data in the eastern Bering Sea.  Water column profiles revealed a latitudinal gradient in the upper to lower density difference with stronger stratification north of lat. 59° N.  In spring, near-surface Chlorophyll a, oxygen, and nutrient data exhibited relationships consistent with the classical Redfield ratios.  Oceanographic conditions were cold throughout the study period which inhibited the group’s ability to compare the strength of density gradients across the shelf in warm and cold years; however, they were able to show that the boundary of the well-mixed, inner shelf was not always located at the 50-m isobath.  Statistical analysis showed strong evidence of environmental influence on vertical and horizontal niche partitioning amongst forage fish and juvenile and adult groundfish.  Depth alone was not sufficient to explain observed spatial distributions; light, bottom temperature, prey availability (euphausiids), and predator abundance were also selected as explanatory variables. Comparison of acoustic estimates of euphausiid and pollock biomass showed pollock predation could be substantial, but overall water temperature was a much stronger predictor of euphausiid biomass than pollock biomass (a proxy for predation pressure), implying bottom-up control dominated.  Frameworks for projecting future impacts of climate change on the spatial distribution and abundance allowed a first order glimpse of future conditions under a changing climate.

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Ocean Sciences Meeting 2014

Anne Hollowed gave an oral presentation in at the Ocean Sciences Meeting February 26, 2014.  Anne’s session focused on Climate Impacts on Living Marine Resources.  Anne’s talk focused on projected impacts of climate change on Arctic and sub-Arctic fish and fisheries.  She discussed the types of changes that are projected to occur under a changing climate and the implications of these changes on key biological processes governing marine fish production. 

By Anne Hollowed.

 

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