Arctic Zooplankton Webinar

A comparison of the zooplankton communities between the Arctic Ocean and subarctic Pacific with emphasis on ROV observations

Event Type: Webinars and Virtual Events

When: 30 March 2020

Where: Online: 8:00-9:00 am AKDT, 12:00-1:00 pm EDT

More information: 
Link to Webinar

Summary

Speaker:
Dr. Russ Hopcroft, University of Alaska Fairbanks, Professor

Abstract:
We describe the zooplankton communities found in the upper 3 kilometers of the oceans to the north and south of Alaska from ROV observations supported by plankton net collections. Each tool has implicit biases. The ROV is particularly adept at finding larger, rarer and more fragile species, while nets provide quantitative information on smaller, more abundant and more robust species. Together they provide a more complete assessment of biodiversity in each habitat.

Key Takeaways:
- Both the Arctic and subarctic habitats are highly-structured by depth, with overall diversity lower within the Arctic.
- Comb-jellies appear to be the top pelagic predators with the deep Arctic Ocean, while jellyfish, finfish and squids share that role in the subarctic Gulf of Alaska.

About the Speaker:
Dr. Hopcroft received his Masters in 1988 and Ph.D. in 1997 from the University of Guelph, and was a postdoctoral fellow at MBARI from 1997-99. He joined the University of Alaska Fairbanks in 2000. He is now the lead investigator for the Northern Gulf of Alaska Long-term Ecological Research (NGA-LTER) program, and is an expert on Arctic and subarctic zooplankton biodiversity. Although much of his research focuses on the abundant copepod crustaceans, he is also a specialist on pelagic tunicates.