Yellowstone Foodweb for Pseudoroegneria spicata (Bluebunch wheatgrass)

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