Technically, it's not as sarcastic as it sounds.

If the carcasses are flushed into the estuary, fall Chinook will be the beneficiaries since they spend alot of their juvenile phase in the lower sections of the river, primarily the estuary. But if the carcasses remain in the upper river, other species will benefit including spring Chinook, coho, and, especially steelhead.

Historically there were plenty of returning adult salmon that provided marine-derived nutrients for both the river and the estuary. But not so much these days.......