31. The rodent community, particularly of the Afro-alpine plateau are keystone species in the Bale Mountains National Park. 32. This led to the conclusion that " Pisaster " was a keystone species in that food web. 33. It is a keystone species in its habitat and can significantly affect water quality and phytoplankton communities. 34. "We consider the alligators a keystone species , " said Tom Armentano, a researcher at Everglades National Park. 35. If such keystone species are lost, biologists say, the rest of the ecosystem can begin to unravel. 36. Cushion plants have been shown to be a keystone species in the ecosystem in which they occur. 37. The wolf was the top predator in Yellowstone, and a keystone species of its ecology, until 1926. 38. Keystone species such as hornbills, parrots and birds of prey ( eagles ) are well represented in Ghana.39. In the Pacific Northwest and Alaska, salmon are keystone species , supporting wildlife such as birds, bears and otters. 40. This direct impact of tourism can severely damage the delicate balance of the food webs and keystone species .
