Human Alterations of Riparian Ecosystems

Stromberg, J. C.; Briggs, Mark K.; Gourley, Chad R.; Scott, Michael L.; Shafroth, Patrick B.; Stevens, Lawrence E.

doi:10.1201/9780203497753.ch6

Cited by 9 publications

(19 citation statements)

References 62 publications

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“…This technique complements other techniques, such as analysis of aerial photography and remote sensing, and provides the unique benefits of identification of species-specific change and a longer record. Aerial photography, which has been used to study landscape changes since it first became available in the late 1920 s or 1930 s, provides reach-scale assessments of change (Stromberg et al, 2004) but does not cover earlier times when many of the changes began, and its resolution allows only limited assessment of changes in species composition. Multispectral satellite imagery provides an excellent technique for monitoring and evaluating ecosystem changes after 1974, and although satellite imagery provides large spatial coverage and collects visible and non-visible spectral data (Kepner et al, 2000), it provides limited information concerning speciescomposition changes.…”

Section: Methods Of Repeat Photographymentioning

confidence: 99%

Ground-water surface-water interactions and long-term change in riverine riparian vegetation in the southwestern United States

Webb

Leake

2006

Journal of Hydrology

127

101

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Section: Methods Of Repeat Photographymentioning

confidence: 99%

Ground-water surface-water interactions and long-term change in riverine riparian vegetation in the southwestern United States

Webb

Leake

2006

Journal of Hydrology

127

101

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“…Stromberg et al (2004Stromberg et al ( , 2007 surmised that the altering of water flows, especially by diversions, is among the greatest threats to Sonoran cottonwoodwillow ecosystems. Stromberg et al (2004Stromberg et al ( , 2007 surmised that the altering of water flows, especially by diversions, is among the greatest threats to Sonoran cottonwoodwillow ecosystems.…”

Section: Water Diversionmentioning

confidence: 99%

Threats to Riparian Ecosystems in Western North America: An Analysis of Existing Literature1

Poff

Koestner

Neary

et al. 2011

JAWRA Journal of the American Water Resources Association

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Poff, Boris, Karen A. Koestner, Daniel G. Neary, and Victoria Henderson, 2011. Threats to Riparian Ecosystems in Western North America: An Analysis of Existing Literature. Journal of the American Water Resources Association (JAWRA) 47(6):1241–1254. DOI: 10.1111/j.1752‐1688.2011.00571.x Abstract: A total of 453 journal articles, reports, books, and book chapters addressing threats to riparian ecosystems in western North America were analyzed to identify, quantify, and qualify the major threats to these ecosystems as represented in the existing literature. Publications were identified either as research, policy, literature review, historical comparison, or management papers. All papers were evaluated based on year of publication, area of interest, and type(s) of threats addressed. Research papers, however, were assessed in more depth. The publications ranged from the 1930s to 2010 and addressed the following threats: dams, pollution (point and nonpoint), grazing, land use change, timber harvesting, water diversion, road construction, recreation, mining, groundwater pumping, invasive species, climate change, salinity, fire, insect and diseases, woody encroachment, watershed degradation, elimination of native vegetation, beavers, fire suppression, and fuel management. While the types of threats vary on spatial and temporal scales, some persist through decades in western North America. This analysis shows that grazing has been perceived as a dominant threat since the 1980s, but has been diminishing in the past decade, while invasive species, dams and, in recent years, climate change are increasingly represented in the literature as threats to riparian ecosystems in western North America.

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“…Perennial streams and their associated riparian communities have contracted or disappeared in arid and semi-arid regions around the world, the result of surface diversions and groundwater extraction (FitzHugh and Richter 2004; Postel 2000; Stromberg and others 2004). The state of Arizona, alone, has lost approximately 35% of its perennial stream flow in the past 200 years (Brown and others 1981).…”

Section: Introductionmentioning

confidence: 99%

Wet/Dry Mapping: Using Citizen Scientists to Monitor the Extent of Perennial Surface Flow in Dryland Regions

Turner

Richter

2011

Environmental Management

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Wet/dry mapping provides a low-cost, comprehensive snapshot for monitoring flow conditions in rivers with interrupted perennial (spatially intermittent) surface flow. When used in conjunction with more traditional point-specific stream flow or groundwater measurements, it provides a better understanding of hydrologic systems at the broad landscape or watershed scale. Through use of trained volunteers, we mapped reaches with surface water during the driest time of year to track annual variation in length and location of perennial flow. Data from 12 years of wet/dry mapping on the San Pedro River in Arizona, USA, showed 62 reaches with surface flow in every year, totaling 32% of the river length through the San Pedro Riparian National Conservation Area. They also show areas with high year-to-year variation in flow length, which indicate changes in local groundwater conditions and may provide early warning of ecological changes. Data and maps from this project have been useful for a wide variety of conservation, management, and research efforts.

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Human Alterations of Riparian Ecosystems

Cited by 9 publications

References 62 publications

Ground-water surface-water interactions and long-term change in riverine riparian vegetation in the southwestern United States

Ground-water surface-water interactions and long-term change in riverine riparian vegetation in the southwestern United States

Threats to Riparian Ecosystems in Western North America: An Analysis of Existing Literature1

Wet/Dry Mapping: Using Citizen Scientists to Monitor the Extent of Perennial Surface Flow in Dryland Regions

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