The bald eagle has been the national symbol of the United States since 1782, representing freedom, power, and majesty. The eagle's impressively large beak and talons, combined with its ability to detect details at great distances, make this...

Viewpoint: Yes, greater species diversity does lead to greater stability in ecosystems. Viewpoint: No, ecosystem stability may provide a foundation upon which diversity can thrive, but increased species diversity does not confer ecosystem stability. In...

The term ecosystem was coined in 1935 by the Oxford ecologist Arthur Tansley to encompass the interactions among biotic and abiotic components of the environment at a given site. It was defined in its presently accepted form by Eugene Odum as...

An ecosystem consists of a biological community and the abiotic factors on which it relies. These factors include sunlight, water, elements, and minerals. Energy flows one way through an ecosystem, starting as sunlight absorbed by primary producers,...

Environmental monitoring detects changes in the health of an ecosystem and indicates whether conditions are improving, stable, or deteriorating. This quality, too large to gauge as a whole, is assessed by measuring indicators, which represent more...

Living things, whether plants or animals, continually interact with their surroundings in many ways. All of the organisms in a given area, plus the nonliving things in that area like water, soil, and air, comprise an ecosystem. The word ecosystem is a...

Systems are assemblages of interacting objects that are linked by transfers of energy and matter, behave in specific ways under certain conditions, and are often governed by cybernetic controls that involve the flow of information through positive and...

The notion of ecosystem (or ecological system) refers to indeterminate ecological assemblages, consisting of communities of organisms and their environment. Ecosystems can vary greatly in size. Small ecosystems can be considered to occur in tidal...

the complex of living organisms, their physical environment, and all their interrelationships in a particular unit of space. A brief treatment of ecosystems follows. For full treatment, &see; Biosphere. An ecosystem can be categorized into its...

Complex of living organisms, their physical environment, and all their interrelationships in a particular unit of space. An ecosystem's abiotic (nonbiological) constituents include minerals, climate, soil, water, sunlight, and all other nonliving...

Any unit, including all the organisms, in a given area, interacting with the physical and chemical environment so that energy flow leads to a clearly defined trophic structure. Structural components of an ecosystem include inorganic substances, organic...

The totality of life within a given interrelated and self-sustaining system existing in a defined geographical...

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An ecosystem is a natural unit consisting of all plants, animals and micro-organisms in an area functioning together with all the non-living physical factors of the...