Filters: Tags: Riparian restoration (X) > Categories: Publication (X) > Types: Journal Citation (X)
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Non-native shrub species in the genus Tamarix (saltcedar, tamarisk) have colonized hundreds of thousands of hectares of floodplains, reservoir margins, and other wetlands in western North America. Many resource managers seek to reduce saltcedar abundance and control its spread to increase the flow of water in streams that might otherwise be lost to evapotranspiration, to restore native riparian (streamside) vegetation, and to improve wildlife habitat. However, increased water yield might not always occur and has been substantially lower than expected in water salvage experiments, the potential for successful revegetation is variable, and not all wildlife taxa clearly prefer native plant habitats over saltcedar....
Categories: Publication;
Types: Citation,
Journal Citation;
Tags: Control,
Environmental Management,
Evapotranspiration,
Exotic species,
Invasive species,
Initially introduced to western United States to provide ecosystem services such as erosion control, Tamarix by the mid-1900s had became vilified as a profligate waster of water. This large shrub continues, today, to be indicted for various presumed environmental and economic costs, and millions of dollars are expended on its eradication. In this review, we examine the role of scientists in driving changes in perceptions of Tamarix from valuable import to vilified invader and (in some instances) back to a productive member of riparian plant communities. Scientists over the years have sustained a negative perception of Tamarix by, among other things, (1) citing outmoded sources; (2) inferring causation from correlative...
Categories: Publication;
Types: Citation,
Journal Citation;
Tags: Restoration Ecology,
anti-exotic bias,
invasive species,
riparian restoration,
scientific rigor
Invasion by the non-native tree Tamarix has led to implementation of restoration projects aimed at maintaining the ecological integrity of many riparian communities in the southwestern United States. These restoration efforts may include Tamarix removal, manipulation of hydrologic regimes, and active revegetation of native species. The goal of this study was to determine which site characteristics are correlated with restoration success, defined in terms of reductions of undesirable species such as Tamarix and establishment of desirable, native species. To accomplish this, vegetative and environmental data were collected at 28 sites in the southwestern United States where active revegetation was completed after...
Categories: Publication;
Types: Citation,
Journal Citation;
Tags: Restoration Ecology,
Tamarix,
arid ecosystems,
invasion ecology,
regression tree analysis,
Beaver (Castor canadensis) populations have declined or failed to recover in heavily browsed enviÂronments. I suggest that intense browsing by livestock or ungulates can disrupt beaver-willow (Salix spp.) mutuÂalisms that likely evolved under relatively low herbivory in a more predator-rich environment, and that this inter action may explain beaver and willow declines. Field experiments in Rocky Mountain National Park, Colorado, USA, found the interaction of beaver and elk (Cervus elaphus) herbivory suppressed compensatory growth in wilÂlow. Intense elk browsing of simulated beaver-cut willow produced plants which were small and hedged with a high percentage of dead stems, whereas protected plants were large...
Categories: Publication;
Types: Citation,
Journal Citation;
Tags: Castor canadensis,
Cervus elaphus,
Lutra,
Mutualism,
Salix,
Using a retrospective study of tamarisk removal sites across five states in the southwestern United States, we investigated (1) decreases in tamarisk cover; (2) the effects of tamarisk removal on vegetation; and (3) whether cutting or burning tamarisk has differing effects on plant communities. Our study provides an important first step in recognizing the effects of removing a dominant invasive species on meeting long-term goals of riparian restoration. We found that (1) both cutting and burning reduced mean tamarisk foliar cover by 82?95%, and this reduction was sustained over time. (2) Native foliar cover was 2- to 3-fold higher on tamarisk removal sites, but total foliar cover remained 60?75% lower than on control...
Categories: Publication;
Types: Citation,
Journal Citation;
Tags: Restoration Ecology,
Tamarix,
invasive plant management,
plant community,
riparian restoration,
Most major rivers in the southwestern United States have been hydrologically altered to meet human needs. Altered hydrological regimes have been associated with declines in native riparian forests. Today, many riparian areas have little or no regeneration of native riparian species and are now dominated by exotic Saltcedar (Tamarix chinensis Lour.). Success of riparian restoration efforts at least partially depends on the number of seedlings surviving the first growing season. Seedling survival is influenced by many abiotic and biotic factors including competition from other plants and available soil moisture, which is partially dependent on soil texture. In this study, we evaluated the relative importance of four...
Categories: Publication;
Types: Citation,
Journal Citation;
Tags: Cottonwood seedling,
Middle Rio Grande Valley,
Populus deltoides,
Restoration Ecology,
riparian restoration,
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