Document Detail

Characterizing long-term land use/cover change in the United States from 1850 to 2000 using a nonlinear bi-analytical model.
MedLine Citation:
PMID:  23151939     Owner:  NLM     Status:  MEDLINE    
We relate the historical (1850-2000) spatial and temporal changes in cropland cover in the conterminous United States to several socio-economic and biophysical determinants using an eco-region based spatial framework. Results show population density as a major determinant during the nineteenth century, and biophysical suitability as the major determinant during the twentieth century. We further examine the role of technological innovations, socio-economic and socio-ecological feedbacks that have either sustained or altered the cropland trajectories in different eco-regions. The cropland trajectories for each of the 84 level-III eco-regions were analyzed using a nonlinear bi-analytical model. In the Eastern United States, low biophysically suitable eco-regions, e.g., New England, have shown continual decline in the cropland after reaching peak levels. The cropland trajectories in high biophysically suitable regions, e.g., Corn Belt, have stabilized after reaching peak levels. In the Western United States, low-intensity crop cover (<10 %) is sustained with irrigation support. A slower rate of land conversion was found in the industrial period. Significant effect of Conservation Reserve Program on planted crop area is found in last two decades (1990-2010).
Sanjiv Kumar; Venkatesh Merwade; P Suresh C Rao; Bryan C Pijanowski
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Publication Detail:
Type:  Historical Article; Journal Article; Research Support, U.S. Gov't, Non-P.H.S.     Date:  2012-11-15
Journal Detail:
Title:  Ambio     Volume:  42     ISSN:  0044-7447     ISO Abbreviation:  Ambio     Publication Date:  2013 Apr 
Date Detail:
Created Date:  2013-03-25     Completed Date:  2013-06-25     Revised Date:  2014-04-01    
Medline Journal Info:
Nlm Unique ID:  0364220     Medline TA:  Ambio     Country:  Sweden    
Other Details:
Languages:  eng     Pagination:  285-97     Citation Subset:  IM    
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MeSH Terms
Agriculture / history*,  trends*
Biophysical Phenomena
Conservation of Natural Resources / history*,  trends*
History, 19th Century
History, 20th Century
Nonlinear Dynamics
Population Density
Socioeconomic Factors / history
United States
Urbanization / history,  trends

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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