An Arctic Conceptual Model workshop co-sponsored by NPRB was held April 30 – May 2, 2013 and the workshop report is available here. The recommended citation for this report is: Dickson, D. (Editor). 2014. Developing a Conceptual Model of the Arctic Marine Ecosystem. Workshop report, North Pacific Research Board, 92p.
Join the discussion about Arctic marine research at the Alaska Marine Science Symposium on January 21 from 4:00-6:00 pm.
The Arctic Ecosystem Perspectives session at the 2014 Alaska Marine Science Symposium will consist of brief presentations from seven panel members about the exciting results and new research questions emerging from existing multi-disciplinary studies in the Chukchi and Beaufort Seas. The presentations will be followed by a discussion, and we encourage audience members to participate. Please join us on Tuesday, January 21 at 4:00 – 6:00 pm at the Hotel Captain Cook. The table below lists the seven panelists and the titles of their presentations.
The Arctic Basins: An integrated physical and biological perspective
The unique physical dynamics and biological seasonality of lagoon ecosystems along the eastern Alaska Beaufort Sea Coast: linkages to food webs and carbon resources
Seasonal and spatial patterns of marine bird and mammal distributions in the Pacific Arctic: A delineation of biologically important marine areas
The Hanna Shoal circulation field in the northeastern Chukchi Sea
The ecological structure of the northeastern Chukchi Sea: CSESP studies, 2008–2012
Tracking physical drivers and ecosystem response in the Pacific Arctic through the Distributed Biological Observatory change detection array
|Lee Cooper||Results from the Pacific Marine Arctic Regional Synthesis (PacMARS)|
November 18, 2013
by Olav Ormseth
A few days ago I returned from our last inshore survey of the 2013 field season (and the last field activity of the GOAIERP). The survey went very well, despite the challenges of short days and cold temperatures. We were blessed with weather that, while not perfect, didn’t get in the way of our research as it has sometimes done in the past. It’s always interesting to return to the same places in different seasons and see the changes that have been wrought, on land as well is in the sea. In Kiliuda Bay, the bare hills are sort of a tired brown in spring, bright green in summer, and golden in the fall (see picture). In Port Dick, a hint of termination dust was to be seen at the very top of the coastal peaks.
In my last post we were headed north to Port Dick, and that is where we worked for the remainder of the survey. The situation there was similar to Kiliuda Bay, with fewer fish all around. We were confirmed in our belief that eelgrass patches seem to retain more fish than kelpy habitats later in the season. Why might that be? We don’t know, but one idea is that eelgrass persists year-round (although it dies back considerably) whereas many kelps disappear almost completely. So, it might be that during the winter, eelgrass simply provides the sort of protective habitat that little fish need.
We were also able to recover the mini-mooring that we had in Port Dick since May. I’ve taken a quick peek at the data and there are some interesting patterns there, including that the deeper water continues to warm even after the surface waters have begun to cool. Comparing the east and west inshore moorings should be interesting.
On the flight back from Kodiak to Anchorage, as we flew over two of our sampling sites in clear weather, I experienced a good illustration of the concept of scale as a major factor in the GOAIERP. From the viewpoint of our little skiff, the distance from the mouth of Izhut Bay to its head seems huge. But from an airplane the two areas seem very close, especially relative to the entirety of Marmot Bay and the Kodiak Island Archipelago. So it is from the perspective of a fish- or for that matter, a parcel of seawater- how different are things within a bay? How about among the various bays just on Kodiak Island? What about variability over the entire northern GOA? In the GOAIERP we are working at multiple scales, which affects everything from how we conduct our research to our interpretation of how the ecosystem works.
NOAA Alaska Fisheries Science Center
Mark Zimmermann is a research fishery biologist in the Gulf of Alaska/Aleutians Islands bottom trawl survey group at the NOAA Alaska Fisheries Science Center. In 1991 he received a MS in Fisheries Science from the University of Washington where he studied long-term growth patterns on sockeye salmon scales from the Wood River lake system in Bristol Bay, Alaska. He graduated from Grinnell College with a BA in Biology in 1986. Mark’s primary research interest is in quantifying the amount of seafloor that is too steep, rough or rocky for sampling during the AFSC’s fishery-independent, bottom trawl surveys. His efforts in addressing this issue have morphed into assembling a detailed bathymetric map for the Gulf of Alaska and Aleutian Islands bottom trawl survey areas. He is collaborating with the USGS usSEABED program to assemble a similar sediment map and combine it with bathymetry to describe seafloor habitats. Most work is done in Geographic Information System (GIS) software for spatial analysis and map production. Mark is contributing to the Surviving the Gauntlet aspect of the Gulf of Alaska Project.
Mark has conducted 35 bottom trawl, seafloor mapping, mini-sub and camera cruises along the US west coast shelf and slope, southern British Columbia, the Gulf of Alaska, Aleutian Islands, and the eastern Bering Sea shelf and slope. He has authored or coauthored articles in the journals of Estuarine, Coastal and Shelf Science, Continental Shelf Research, Marine Ecology Progress Series, ICES Journal of Marine Science, Canadian Journal of Fisheries and Aquatic Sciences, Fishery Bulletin, and Fisheries Oceanography.
NOAA Alaska Fisheries Science Center
Molly Zaleski of the NOAA Alaska Fisheries Science Center is contributing to the Surviving the Gauntlet aspect of the Gulf of Alaska Project.