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<br /> <br />000199 <br /> <br />size or Quality, thete are corresponding adverse environmental effects <br /> <br />I~ <br />; <br /> <br />borne by society. <br /> <br />Beneficial effects resulting from preservation of ecological systems <br /> <br />include: ' <br /> <br />1. The maintenance of a natural environment in a state of equilibrium <br />as an intrinsic value to society. <br /> <br />2. The provision of the purest form of aesthetic contact with nature. <br /> <br />3. Contributions to the development, appreciation, and integration <br />of a "land ethic" or environmental conscience as part of man's culture; <br />and <br /> <br />I,. Scientific, underst:lOdin~ derived from the preservation and study <br />'of n3tllral ecological systems which contributes to the conservatJon <br />of n3tural resources in general, the most llractical application of <br />ecology. <br /> <br />Conversely, adverse effects are the reduction or loss of opportunity'to <br /> <br />" " <br />. -' I <br />"1 ., <br /> <br />I," <br /> <br />, a society as a result of a plan. <br /> <br />An example of high-value area would be one where the ecosystem (e.~., <br /> <br />prarie, marsh, estuary, river) is stable and the plants, animals, and <br /> <br />physical conditions associated with it fluctuate within normal ranges. <br /> <br />A low-value area would be one where abrupt changes are occurring that <br /> <br />destroy the balance of interactions within the ecosystem. <br /> <br />(A) Quantity factors: <br /> <br />1. Size in, acres of tundra ecosystems. <br /> <br />2. Size in acres of forest ecosystems. <br /> <br />3. Size in acres of shrublands and desert ecosystems. <br /> <br />4. Size in acres of grassland ecosystems. <br /> <br />5. Si?e in acres of lake and river ecosystems., <br /> <br />".' ~ \ <br /> <br />6. Size in acres of bog, marsh, swamp, and estuarine ecosystems. <br /> <br />4-30 <br />