The term keystone species was first coined by Robert Paine (1966) after extensive studies examining the interaction strengths of food webs in rocky intertidal ecosystems in the Pacific Northwest.

University of Delaware entomologist Doug Tallamy's research has identified “keystone” plant species that make up the foundation of many U.S. ecosystems by producing food for native insects, thus ...

University of Delaware entomologist Doug Tallamy’s research has identified “keystone” plant species ... producing food for native insects, thus supporting the ecological food web.

University of Delaware entomologist Doug Tallamy's research has identified “keystone” plant species ... producing food for native insects, thus supporting the ecological food web.

Oaks, Asters and 6 Other 'Keystone ... plant species that make up the foundation of many U.S. ecosystems by producing food for native insects, thus supporting the ecological food web.