. >> you know, it's a large basin with a diverse range of ecosystems. [ music ] >> so,he chehas rivef saln part oit is duto its size, ansome oit is du tots cracteriscs. pari an salmos a its size, aystone scies.du chehalisalmon a critally imptant to ca, thats southe residt kill whales, that co anfeed offhe waington cst. >> the smon evold right ong with t landsca thate know tay. d it shod not be big stery aso why th're soxquisite adaptiv to ts, you kw, dynam and somewhat dgerous environmt of theorthwest the northwest, you're going yn to see them, and some of them are going to look really great and real pristine, but wh you nee to reaze is th're amatical differe than they were 200 years ago. >> imagine we go back to 1850. we're surrounded by this cathedral forest of old growth. >> a lotf salmoneaven. salmoneaven ishe place whero as it ge for saln. salmoneaven ishe place whero >> smon evold tohese contions ath were re befen. ssy, whe there'sots, where te of wooin our stems. >> grand total, if you took all the species and added them together, there would have been years ere therwould ha b