Yellowstone Foodweb for Populus trichocarpa (black cottonwood)

Yellowstone
Canis lupus
(Wolf)
Ursus americanus
(black bear)
Ursus arctos
(Grizzly Bear)
 
Cervus elaphus
(wapiti or elk)
 
Populus trichocarpa
(black cottonwood)
 
Ecosystem provided by National Geographic Magazine - May 2016 - Yellowstone - The Carnivore Comeback