Biological feedbacks in global desertification

William H. Schlesinger, James F. Reynolds, Gary L. Cunningham, Laura F. Huenneke, Wesley M. Jarrell, Ross A. Virginia, Walter G. Whitford

Research output: Contribution to journalArticle

1728 Scopus citations

Abstract

Studies of ecosystem processes on the Jornada Experimental Range in southern New Mexico suggest that long-term grazing of semiarid grasslands leads to an increase in the spatial and temporal heterogeneity of water, nitrogen, and other soil resources. Heterogeneity of soil resources promotes invasion by desert shrubs, which leads to a further localization of soil resources under shrub canopies. In the barren area between shrubs, soil fertility is lost by erosion and gaseous emissions. This positive feedback leads to the desertification of formerly productive land in southern New Mexico and in other regions, such as the Sahel. Future desertification is likely to be exacerbated by global climate warming and to cause significant changes in global biogeochemical cycles.

Original languageEnglish (US)
Pages (from-to)1043-1048
Number of pages6
JournalScience
Volume247
Issue number4946
DOIs
StatePublished - Jan 1 1990
Externally publishedYes

ASJC Scopus subject areas

  • General

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    Schlesinger, W. H., Reynolds, J. F., Cunningham, G. L., Huenneke, L. F., Jarrell, W. M., Virginia, R. A., & Whitford, W. G. (1990). Biological feedbacks in global desertification. Science, 247(4946), 1043-1048. https://doi.org/10.1126/science.247.4946.1043