WebLinking Keystone Species and Functional Groups: A New Operational Definition of the Keystone Species Concept . Robert D. Davic. ABSTRACT. The concept of the "keystone species" is redefined to allow for the a priori prediction of these species within ecosystems. A keystone species is held to be a strongly interacting species whose top-down effect Webnoun Definition of keystone as in cornerstone an immaterial thing upon which something else rests a sense of history is the keystone to the city's draw as a tourist destination …

Keystone species, facts and photos - National Geographic

Webnoun. : the wedge-shaped piece at the crown of an arch that locks the other pieces in place see arch illustration. or keystone species : a species of plant or animal that produces … Web[ kē ′stōn′ ] A species whose presence and role within an ecosystem has a disproportionate effect on other organisms within the system. A keystone species is often a dominant … great beams

Keystone Species - Definition and Examples Biology …

WebPennsylvania's nickname is "The Keystone State" because it was the middle colony of the original thirteen colonies, and because Pennsylvania has held a key position in the economic, social, and political … Webkey·stone (kē′stōn′) n. 1. Architecture A wedge-shaped stone at the top of an arch, often larger or more ornamented than the other voussoirs. Also called headstone. 2. The … Webkeystone species (definition) a species that has a major influence on the way an ecosystem works foundation species species that plays a critical role in establishing an environment (e.g. coral) umbrella species similar to a keystone species, but often migratory, requiring large amounts of habitat for survival (tiger) indicator species chopin cd