One of the Biggest Arctic Migrations You’ve Never Heard Of
by Carmen Yeung
The Bering Strait—located between Alaska’s Seward Peninsula and Russia’s Chukotka Peninsula—is the only marine gateway connecting the Arctic Ocean and Pacific Ocean. At its narrowest point, the strait is just 55 miles wide. Big Diomede Island (Russia) and Little Diomede Island (U.S.) are located near the middle of the Bering Strait, and are separated by a strip of water less than three miles wide.
Despite its cold, remote location, the Bering Strait is a key biological hotspot, a region that contains a significant number of species – some of which are found nowhere else on Earth. This strait is both a bottleneck and a pathway for marine life.
Each spring, millions of seabirds and hundreds of thousands of marine mammals traverse the narrow strait as they migrate to the Arctic Ocean. Sea ice—frozen seawater that floats on the ocean surface—plays a major role in this seasonal migration.
In the spring, migratory birds and marine mammals gather in the Bering Sea and follow the retreating ice edge north through the Bering Strait and into the Chukchi Sea and the Arctic Ocean. The ice edge is highly productive, and the sea ice itself provides important habitat for microorganisms, birds and marine mammals. The Bering and Chukchi Seas are one of the most productive ocean ecosystems in the world…
(read more: Ocean Conservancy)
photos: Ribbon Seal - NOAA Fisheries; Satelite Images - NASA; and Northern Bowhead Whales - NOAA Marine Mammal Laboratory