Keystone species have a major influence on the structure of their ecological community. The profound influence of keystone species occurs because of their position and activity within the food chain/web. In the sense meant here, a "major...

All ecosystems on Earth are formed of a delicate balance of species. When an ecosystem is at equilibrium, the relative numbers of organisms within each species remain stable. A food web is a graphical representation of the trophic (food-based)...

A keystone species is a species that has a disproportionate effect on its environment relative to its abundance[1], affecting many other organisms in an ecosystem and help in determine the types and numbers of various others species in a community. Such...

Unlike some highly successful business owners, Sam Stoltzfus always plays it safe. About a decade ago, Stoltzfus, president of Keystone Wood Specialties in East Lampeter Township, decided to prioritize safety and adopt measures that raised the bar on safety in the wood-working industry. As...

The Keystone Center in Keystone, CO, is a nonprofit organization dedicated to mediating public policy conflicts on environmental issues between different parties. Presently, its projects cover Superfund site cleanup, food label health claims and automotive emissions issues. For 20 years, the Keystone Center,...