Program and Agenda

Abstract

POPULATION GENETICS OF THE CALANUS GLACIALIS/MARSHALLAE SPECIES COMPLEX IN THE BERING AND WESTERN ARCTIC SEAS

Calanoid copepods of the Calanus glacialis/marshallae species complex are often the biomass dominants of zooplankton communities in the western Arctic and subarctic marginal seas and an important trophic link between primary producers and fish. These two closely related congeners are very difficult to distinguish using traditional taxonomic methods. To better understand their population distributions in these high latitude seas, the genetic sequences of the mitochondrial 16S and CO1 genes were determined for specimens collected during different research programs spanning multiple seasons and years. Both species co-occurred in the southern Bering Sea, with C. glacialis dominant in the mid-shelf region and C. marshallae relatively more abundant in the outer shelf/slope region. C. glacialis was by far more important from the northern Bering Sea to the Canada Basin, although specimens of C. marshallae regularly occurred as far north as Barrow, Alaska. In the Chukchi Sea, genetically distinct populations of C. glacialis of Bering Sea and Arctic origin were mixed to varying degrees. Climate warming will likely expand the boundaries of the Bering Sea populations further north while contracting those of Arctic populations.

ePoster:

Authors

Campbell, R. G., University of Rhode Island, USA, campbell@gso.uri.edu

Gelfman, C., University of Rhode Island, USA, cgelfman@gso.uri.edu

Dennis, M., University of Rhode Island, USA, mfdennis@my.uri.edu

McCoy, I., University of Rhode Island, USA, iainmccoy@my.uri.edu

Ashjian, C. J., Woods Hole Oceanographic Institution, USA, cashjian@whoi.edu

Details

Poster presentation

Session #:088
Date: 2/24/2014
Time: 16:00 - 18:00
Location: Poster/Exhibit Hall

Presentation is given by student: No

PosterID: 1146