Associated Press: Thousands of walruses are congregating on Alaska’s northwest coast, a sign that their Arctic sea ice environment has been altered by climate change. Chad Jay, a U.S. Geological Survey walrus researcher, said Wednesday that about 3,500 walruses were near Icy Cape on the Chukchi Sea, some 140 miles southwest of Barrow. Animals the agency tagged with satellite transmitters also were detected on shore at Cape Lisburne about 150 miles farther down the coast. Walruses for …