A field book used by Yurok Tribe biologists is seen on the shore of the lower Klamath River while researchers monitor nearby chinook salmon populations on Tuesday, June 8, 2021, in Weitchpec, Calif. Competition over the water from the river has always been intense, but this summer there is not enough for all users. Native American tribes along the 257-mile-long river are watching fish species hover closer to extinction as water flows are reduced. (AP Photo/Nathan Howard)