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Tamarisk and river restoration along the San Pedro and Gila RiversAuthor(s): Juliet Stromberg; Sharon Lite; Charles Paradzick
Source: In: Gottfried, Gerald J.; Gebow, Brooke S.; Eskew, Lane G.; Edminster, Carleton B., comps. Connecting mountain islands and desert seas: biodiversity and management of the Madrean Archipelago II. Proc. RMRS-P-36. Fort Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station: 302-307
Publication Series: Proceedings (P)
Station: Rocky Mountain Research Station
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DescriptionThe abundance of tamarisk (Tamarix ramosissima and related species) along the San Pedro and Gila River flood plains varies with differences in stream flow regimes. Tamarisk abundance, relative to Fremont cottonwood and Goodding willow, is greater at sites with more intermittent stream flows and deeper and more fluctuating ground-water levels. Tamarisk abundance is further increased below Coolidge Dam, where both flood and low flow patterns have been altered. Shifts from cottonwood-willow to tamarisk parallel other changes in the riparian community: as rivers are dewatered and flood regimes altered, species diversity and landscape heterogeneity decline. Tamarisk dominance can be seen as an indicator, rather than a cause, of riparian degradation, reflecting changes in the physical processes that shape riparian plant communities. Restoration strategies should focus on identifying and alleviating these underlying environmental stressors to produce long-lasting results.
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CitationStromberg, Juliet; Lite, Sharon; Paradzick, Charles. 2005. Tamarisk and river restoration along the San Pedro and Gila Rivers. In: Gottfried, Gerald J.; Gebow, Brooke S.; Eskew, Lane G.; Edminster, Carleton B., comps. Connecting mountain islands and desert seas: biodiversity and management of the Madrean Archipelago II. Proc. RMRS-P-36. Fort Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station: 302-307
KeywordsTamarix ramosissima, Tamarix chinensis, invasive species, species diversity, rivers, riparian areas, restoration, San Pedro River (Mexico and Ariz.), Gila River (N.M. and Ariz.)
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