Loggerhead sea turtles are sentinels for changing oceans. In a new analysis covering nearly 30 years of data on turtle movements, sea surface temperatures, and seawater chlorophyll levels, Stanford scientists found that the reptiles are shifting their range at a record pace, racing to keep up as their favorite foraging grounds move northward. Loggerhead sea turtles are sentinels for changing oceans. In a new analysis covering nearly 30 years of data on turtle movements, sea surface temperatures, and seawater chlorophyll levels, Stanford scientists found that the reptiles are shifting their range at a record pace, racing to keep up as their favorite foraging grounds move northward. Plants & Animals Ecology Phys.org – latest science and technology news stories