Download e-book for iPad: Conservation in Highly Fragmented Landscapes by John E. Ebinger (auth.), Mark W. Schwartz (eds.)

By John E. Ebinger (auth.), Mark W. Schwartz (eds.)

ISBN-10: 1475706561

ISBN-13: 9781475706567

ISBN-10: 1475706588

ISBN-13: 9781475706581

Mark W. Schwartz quickly when we got here into large meadows: and that i was once guaranteed that these meadows proceed for 150 miles. being in iciness drowned lands and marshes. via the dryness of the season they have been now appealing pastures, and right here offered itself essentially the most pleasant clients i've got ever beheld; all low grounds being meadow, and with out wooden, and the entire excessive grounds being lined with bushes and showing like islands: the complete scene appeared an elysium. Capt. Thomas Morris. 1791 i'm sitting in a 60-mile-an-hour bus crusing over a street initially laid out for horse and buggy. The ribbon of concrete has been widened and widened till the sector fences threaten to topple into the line cuts. within the slender thread of sod among the shaved banks and the toppling fences develop the relics of what as soon as used to be Illinois: the prairie.

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Extra resources for Conservation in Highly Fragmented Landscapes

Example text

However, conservation at the community level poses several difficulties, particularly with dynamic systems in highly fragmented landscapes. , White 1978), is fraught with challenges similar to those imposed by taxonomic species concepts (Ehrlich and Raven 1969, Levin 1979). The debate as to whether plant communities actually exist (Wilson 1991, 1994; Keddy 1993) becomes more complex as knowledge of the spatial and temporal dynamic nature of individual species and vegetation is gained (Gleason 1926, van der Maarel and Sykes 1993).

The importance of graminoid species tends to decline and woody plant seedlings and vines increase along the gradient from open prairie to closed forest (Bray 1960). A principal difference between tallgrass savanna and open-woodland communities is the composition of matrix graminoid species. , Carex pensylvanica. C. artitecta, C. umbellata, C. muhlenbergii, C. hirsutella). The transition from prairiegrass dominance to woodland-grass/sedge dominance can be abrupt, suggesting prairie grasses share a common threshold of shade (in)tolerance (Bray 1958).

1987. From fragmentation to extinction. Natural Areas Journal 7:23-29. S. 1971. Implications of changes in floristic composition of the Morton Arboretum's east woods. V. E. S. Wilhelm, eds. Proceedings of the Oak Woods Management Workshop. Eastern Illinois University, Charleston, Ill. 31-54. Williams, M. 1989. Americans and their forests: a historical geography. Cambridge University Press, New York. 2 Savanna and Open-Woodland Communities John B. Taft Illinois Natural History Survey, Champaign, IL 61820 Among the 'oak-openings' you find some of the most lovely landscapes of the West, and travel for miles and miles through varied park scenery of natural growth, with all the diversity of gently swelling hill and dale-here, trees grouped, or standing single-and there, arranged in long avenues as though by human hands, with slips of open meadow between.

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Conservation in Highly Fragmented Landscapes by John E. Ebinger (auth.), Mark W. Schwartz (eds.)

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