Water-quality impacts of wetland management in the Lower Klamath National Wildlife Refuge, Oregon and California, USA

Mayer, Tim

doi:10.1672/0277-5212(2005)025[0697:wiowmi]2.0.co;2

Cited by 16 publications

(21 citation statements)

References 15 publications

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“…2). Ady Canal flow needs were greatest then, for irrigation, to meet evapotranspirative demand in the wetlands, and to flood seasonal wetlands in late autumn (Mayer, 2005).…”

Section: Methodsmentioning

confidence: 99%

“…Mayer (2005) found that nutrient concentrations increased in refuge outflow, but that overall nutrient loads were decreased, with net retention of nitrogen and phosphorus by the refuge. Lost River TMDL analysis also determined that Lower Klamath National Wildlife Refuge was a nutrient sink (Oregon Department of Environmental Quality, 2010), considering its inflows from Ady Canal, Tule Lake, and other inputs.…”

Section: Consideration Of Cumulative Effectsmentioning

confidence: 96%

“…1). Ady Canal flows in the opposite direction, withdrawing water from the Klamath River and delivering it to agricultural lands and the Lower Klamath National Wildlife Refuge, which has permanently flooded wetlands, seasonal wetlands, agricultural lands, and upland habitat (Mayer, 2005). A water budget developed for years 2003-05 for this refuge was used to estimate that Ady Canal supplied 25 percent of refuge inflow (Risley and Gannett, 2006).…”

Section: Scenario 11 Klamath Straits Drain Recirculationmentioning

confidence: 99%

“…Concentration and dilution are affected by factors such as evaporation, precipitation, dissolution from soils, type of hydrologic water year or season (wet/dry), and residence time, all of which can vary spatially. For instance, Mayer (2005) found that estimated residence times within the Lower Klamath National Wildlife Refuge were 210 days for seasonal wetlands, 60 days for farmed units, and 6.6 days for permanent wetlands. In addition, other factors contribute to cumulative effects.…”

Section: Consideration Of Cumulative Effectsmentioning

confidence: 99%

See 3 more Smart Citations

Water-quality modeling of Klamath Straits Drain recirculation, a Klamath River wetland, and 2011 conditions for the Link River to Keno Dam reach of the Klamath River, Oregon

Sullivan¹,

Sogutlugil²,

Deas³

et al. 2014

Open-File Report

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“…2). Ady Canal flow needs were greatest then, for irrigation, to meet evapotranspirative demand in the wetlands, and to flood seasonal wetlands in late autumn (Mayer, 2005).…”

Section: Methodsmentioning

confidence: 99%

Section: Consideration Of Cumulative Effectsmentioning

confidence: 96%

Section: Scenario 11 Klamath Straits Drain Recirculationmentioning

confidence: 99%

Section: Consideration Of Cumulative Effectsmentioning

confidence: 99%

See 2 more Smart Citations

Water-quality modeling of Klamath Straits Drain recirculation, a Klamath River wetland, and 2011 conditions for the Link River to Keno Dam reach of the Klamath River, Oregon

Sullivan¹,

Sogutlugil²,

Deas³

et al. 2014

Open-File Report

View full text Add to dashboard Cite

“…There are multiple ways to examine water movement and subsequent water quality conditions in wetland and aquatic systems, including: measuring stage differences between canal and marsh (e.g., Mayer and Thomasson 2004); application of dye studies (e.g., Kadlec and Knight 1996;Kratzer and Biagtan 1997;Hutcheson 1998); measurement of water quality constituents in a wetland (e.g., Mayer 2005;USFWS 2007); and documenting ecological changes attributable to effects of point and non-point nutrient sources (e.g., O'Dell et al 1995;Lopez and Fennessy 2002). In the Refuge, canal water conductivity frequently is an order of magnitude higher than that in the marsh interior (Harwell et al 2005), and the conservative nature of conductivity allows for its use as a tracer of canal water.…”

mentioning

confidence: 99%

Conductivity as a tracer of agricultural and urban runoff to delineate water quality impacts in the northern Everglades

Harwell

Surratt

Barone

et al. 2008

Environ Monit Assess

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Agricultural and urban runoff pumped into the perimeter canals of the Arthur R. Marshall Loxahatchee National Wildlife Refuge (Refuge), a 58,320-ha soft-water wetland, has elevated nutrients which impact the Refuge interior marsh. To best manage the Refuge, linkages between inflows to the perimeter canals and environmental conditions within the marsh need to be understood. Conductivity, which typically is high in the canals and lowest at the most interior sites, was used as a surrogate tracer to characterize patterns of constituent transport. The Refuge was initially classified into four zones based upon patterns and variability in conductivity data: Canal Zone; Perimeter Zone (canal to 2.5 km into the interior); Transition Zone (2.5 to 4.5 km from the canal); Interior Zone (>4.5 km from the canal). Conductivity variability declined from the Perimeter to the Interior Zone, with the highest variability in the marsh observed in the Perimeter Zone and the lowest variability observed in the Interior Zone. Analysis of other water quality parameters indicated that conditions in the Perimeter and Transition Zones were different, and more impacted, than in the Interior Zone. In general, there was a positive relationship between structure inflows and canal phosphorus concentrations, including discharges from treatment wetlands and bypasses of untreated water. This classification approach is applicable for stratified sampling designs, resolving spatial bias in water quality models, and in aiding in management decisions about resource allocation.

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Migration efficiency sustains connectivity across agroecological networks supporting sandhill crane migration

et al. 2021

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Preserving avian flyway connectivity has long been challenged by our capacity to meaningfully quantify continental habitat dynamics and bird movements at temporal and spatial scales underlying long-distance migrations. Waterbirds migrating hundreds or thousands of kilometers depend on networks of wetland stopover sites to rest and refuel. Entire populations may rely on discrete wetland habitats, particularly in arid landscapes where the loss of limited stopover options can have disproportionately high impacts on migratory cost. Here, we examine flyway connectivity in water-limited ecosystems of western North America using 108 GPS tagged greater sandhill cranes. Bird movements were used to reconstruct wetland stopover networks across three geographically unique sub-populations spanning 12 U.S.-Mexican states and Canadian provinces. Networks were monitored with remote sensing to identify long-term trends in wetland and agricultural resources supporting migration and evaluated using network theory and centrality metrics as a measure of stopover site importance to flyway connectivity. Sandhill crane space use was analyzed in stopover locations to identify important ownership and landscape factors structuring bird distributions. Migratory efficiency was the primary mechanism underpinning network function. A small number of key stopover sites important to minimizing movement cost between summering and wintering locations were essential to preserving flyway connectivity. Localized efficiencies were apparent in stopover landscapes given prioritization of space use by birds where the proximity of agricultural food resources and flooded wetlands minimized daily movements. Model depictions showing wetland declines from 16% to 18% likely reflect a new normal in landscape drying that could decouple agriculture-waterbird relationships as water scarcity intensifies. Sustaining network resilience will require conservation strategies to balance water allocations preserving agricultural and wetlands on private lands that accounted for 67-96% of habitat use. Study outcomes provide new perspectives of agroecological relationships supporting continental waterbird migration needed to prioritize conservation of landscapes vital to maintaining flyway connectivity.

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Water-quality impacts of wetland management in the Lower Klamath National Wildlife Refuge, Oregon and California, USA

Cited by 16 publications

References 15 publications

Water-quality modeling of Klamath Straits Drain recirculation, a Klamath River wetland, and 2011 conditions for the Link River to Keno Dam reach of the Klamath River, Oregon

Water-quality modeling of Klamath Straits Drain recirculation, a Klamath River wetland, and 2011 conditions for the Link River to Keno Dam reach of the Klamath River, Oregon

Conductivity as a tracer of agricultural and urban runoff to delineate water quality impacts in the northern Everglades

Migration efficiency sustains connectivity across agroecological networks supporting sandhill crane migration

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