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The Future of DrylandsCharacterizing Dryland Post-grazing Change Trajectories on Santa Cruz Island, CA, with Multitemporal Landsat Data

The Future of Drylands: Characterizing Dryland Post-grazing Change Trajectories on Santa Cruz... [In the last part of the 20th century, Santa Cruz Island, California, was abruptly converted from a privately held ranch into a national park and natural preserve. During this conversion, tens of thousands of sheep were eradicated from the island, drastically changing its ecological system. This study uses a combination of spectral mixture analysis and time series trend analysis to characterize and quantify land-cover change on Santa Cruz Island in the post-grazing period of 1985–2002. These changes range from substantial re-vegetation in pastures most affected by overgrazing to massive landslides. This study identified nine classes of land cover change and explored the roles of geology, slope, and aspect in assessing the underlying factors controlling spatial differences in the recovery of overgrazed areas. Historic land use in the form of grazing intensity was found to be the single most important factor for predicting land cover change on Santa Cruz Island, followed closely by underlying geology. Slope and aspect also affect land cover change, but their contributions are much more subtle.] http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png

The Future of DrylandsCharacterizing Dryland Post-grazing Change Trajectories on Santa Cruz Island, CA, with Multitemporal Landsat Data

Editors: Lee, Cathy; Schaaf, Thomas
Perroy, Ryan L.
The Future of Drylands — Jan 1, 2008
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References (23)

Publisher
Springer Netherlands
Copyright
© Springer Netherlands 2008
ISBN
978-1-4020-6969-7
Pages
359–371
DOI
10.1007/978-1-4020-6970-3_35
Publisher site
See Chapter on Publisher Site

Abstract

[In the last part of the 20th century, Santa Cruz Island, California, was abruptly converted from a privately held ranch into a national park and natural preserve. During this conversion, tens of thousands of sheep were eradicated from the island, drastically changing its ecological system. This study uses a combination of spectral mixture analysis and time series trend analysis to characterize and quantify land-cover change on Santa Cruz Island in the post-grazing period of 1985–2002. These changes range from substantial re-vegetation in pastures most affected by overgrazing to massive landslides. This study identified nine classes of land cover change and explored the roles of geology, slope, and aspect in assessing the underlying factors controlling spatial differences in the recovery of overgrazed areas. Historic land use in the form of grazing intensity was found to be the single most important factor for predicting land cover change on Santa Cruz Island, followed closely by underlying geology. Slope and aspect also affect land cover change, but their contributions are much more subtle.]

Published: Jan 1, 2008

Keywords: Remote sensing; grazing; soil erosion; land cover change

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