Arctic Ocean Invertebrate and POM Carbon and Nitrogen Isotope Dynamics

Carbon and Nitrogen Isotope Dynamics Biological material from three levels in the ocean (POM, plankton, benthos) was collected to determine the natural abundance of d13C and d15N. Isotope data were used to trace the advection of northward flowing organic material through the Bering Strait into the Chukchi and Bering Seas. Isotope signatures also provided information about the trophic links between pelagic and benthic components of the shelf and slope within the study area. Collections were made from USCG R/V Healy during two expeditions through the Bering, Chukchi, and eastern Beaufort Seas. The first 6-week expedition occurred from 15 May to 23 June 2004 (Spring) and the second from 16 July to 26 August 2002 (Summer).