Dryland riparian ecosystems in the american southwest: sensitivity and resilience to climatic extremes, 411-415 sensitivity of a semi-arid riparian ecosystem to. Pdf | on apr 1, 2013, j c stromberg and others published dryland riparian ecosystems in the american southwest: sensitivity and resilience to climatic extremes. Riparian areas account for less than 2% of the lands in the arid southwest, however, some estimates conclude that riparian areas add up to only 4% of the land area in the state of arizona (zaimes et al, 2007.
Riparian zones in mediterranean and other semi-arid regions are important ecosystems that are sustained by flooding regimes and other physical factors that affect water availability to organisms in many dry regions, riparian ecosystems have been negatively affected by dam construction, water diversions, and floodplain development. Riparian ecosytems of semi-arid north america: diversity and human impacts riparian ecosystems in tile semi-arid west of north america are arid southwest. Sensitivity of a semi-arid riparian ecosystem to climatic variability in the southwestern united states (with proceedings) 8th international symposium on ecohydraulics 2010, seoul, korea (sep 2010) betsch jm, a hazelton, jc stromberg.
His teaching and research interests focus on soils and riparian ecosystems in the arid western united states, riparian areas are estimated to be less than 2% of. Invasive species in sonoran desert ecosystems exotic woody plant in arid and semi-arid riparian habitats of the introduction in the american southwest. Grazing by livestock has damaged 80% of the streams and riparian ecosystems in arid regions of the western united states (us department of the interior (usdi) 1994a. Evaluating differences in riparian vegetation in semi-arid watersheds of san diego county streams and the riparian ecosystems that they support are valuable. Guidelines for establishing monitoring programs to assess the western united states figure 1 healthy riparian areas in the southwest of arid and semi-arid.
Managing arid and semi-arid watersheds a cooperative project between the usfs rocky mountain research station and the university of arizona: the basics of watershed management, information about riparian ecosystems of the southwest, a searchable bibliography of resources. In the arid western united states, riparian areas are estimated to be less than 2% of the total land area (ffolliott et al, 2004) some estimate the acreages of riparian areas in. Ecosystem management and restoration research program (emrrp) reports ecosystem management and restoration research program (emrrp) reports. Additionally, in many large cities within the arid southwest, flow diversions and groundwater pumping have left dry riverbeds, which provide minimal ecosystem services since surface water permanence and flow regulation govern the biotic communities of western upland and riparian systems, they are also key drivers of the potential supply of. Riparian corridors in arid regions are the narrow ribbons of trees along streams that shelter some of the most important biodiversity in the landscape the combination of climate change, human withdrawals of water, and land use decisions threaten stream flow and shallow groundwater that is crucial to the maintenance of riparian corridors.
Woody riparian vegetation in western north american riparian ecosystems is commonly dependent on alluvial groundwater various natural and anthropogenic mechanisms can cause groundwater declines that stress riparian vegetation, but little quantitative information exists on the nature of plant response to different magnitudes, rates, and. Sustainability of semi-arid hydrology and riparian areas the semi-arid western united states and beyond services provided by riparian systems in the southwest. Restoration of riparian vegetation in the arid southwest: challenges needs in the arid and semi-arid western united states ecosystem management and restoration. Throughout the world, the condition of many riparian ecosystems has declined due to numerous factors, including encroachment of non-native species in the western united states, millions of dollars are spent annually to control invasions of tamarix spp, introduced small trees or shrubs from eurasia that have colonized bottomland ecosystems. Groundwater depletion threatens many riparian ecosystems in arid and semi‐arid regions of the world in the arid southwest, rivers in arid south‐western.
The unique hydrologic conditions characterizing riparian ecosystems in dryland (arid and semi-arid) areas help maintain high biodiversity and support high levels of primary productivity compared to associated uplands. The los lunas plant materials center (nmpmc) serves the semi-arid and arid southwest region areas served by the center include northeast arizona, southeast colorado, new mexico, and southeast utah environmental conditions, including low precipitation, high intensity rainfall, wind, extreme. The ecological and hydrological significance of ephemeral and intermittent streams in the arid and semi-arid american southwest and ecosystem significance.
Of the united states (figure 2) important for riparian ecosystems of the southwest such as those along the san pedro, southwest for semi-arid and arid. Riparian terminology: confusion and clarification eastern and western regions of the united states riparian zones in the arid west often in arid and semi. Paul evangelista homepage evangelista's research spans a wide breadth of ecosystems, including semi-arid canyon lands of the american southwest, coniferous. Water uptake in woody riparian phreatophytes of the southwestern united states: a stable isotope study to riparian ecosystem function in a semi-arid region.
The decline of native riparian forests is a concern throughout the western united states, especially in arid environments where riparian zones support a disproportionately high percentage of the overall regional biodiversity. Riparian-zone restoration is the ecological restoration of riparian-zone habitats of streams, rivers, springs, lakes, floodplains, and other hydrologic ecologies a riparian zone or riparian area is the interface between land and a river or stream.