Soil phosphorus release from a restoration wetland, Upper Klamath Lake, Oregon

Aldous, Allison; Craft, Christopher; Stevens, Carla; Barry, Matthew; Bach, Leslie

doi:10.1672/0277-5212(2007)27[1025:sprfar]2.0.co;2

Cited by 57 publications

(43 citation statements)

References 25 publications

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“…Although consistently positive, the variability of SRP fluxes in the reconnected wetlands, established wetlands, and lake sites could not be explained by any temporal trends. Using water-column concentrations before and up to three weeks after the wetland flooding, Wong et al [30] calculated the benthic flux of total phosphorus (primarily as SRP) of 10 mg/m 2 /d, less than that predicted by laboratory experiments by Aldous et al [72] but within the range reported herein. Using core incubations, Aldous et al [72] observed a total phosphorus release that was mostly constrained to the first 48 h after soil flooding.…”

Section: Hypothesis 3: Temporal Changes In Reconnected Wetland Benthisupporting

confidence: 57%

“…Using core incubations, Aldous et al [72] observed a total phosphorus release that was mostly constrained to the first 48 h after soil flooding. Although consistently positive, the variability of SRP fluxes in the reconnected wetlands, established wetlands, and lake sites could not be explained by any temporal trends.…”

Section: Hypothesis 3: Temporal Changes In Reconnected Wetland Benthimentioning

confidence: 99%

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Changes in benthic nutrient sources within a wetland after hydrologic reconnection

Kuwabara

Topping

Carter

et al. 2012

Enviro Toxic and Chemistry

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Removing dams and levees to restore hydrologic connectivity and enhance ecosystem services such as nutrient removal has been an increasingly common management practice. In the present study, the authors assessed geochemical and biological changes following engineered levee breaches that reconnected eutrophic Upper Klamath Lake and Agency Lake, Oregon, USA, to an adjacent, historic wetland that had been under agricultural use for the last seven decades. Over the three-year study, the reconnected wetland served as a benthic source for both macronutrients (dissolved organic carbon [DOC], soluble reactive phosphorus [SRP], and ammonia) and micronutrients (dissolved iron and manganese). The magnitude of those benthic sources was similar to or greater than that of allochthonous sources. The highest DOC benthic flux to the water column occurred immediately after rewetting occurred. It then decreased during the present study to levels more similar to the adjacent lake. Dissolved ammonia fluxes, initially negative after the levee breaches, became consistently positive through the remainder of the study. Nitrate fluxes, also initially negative, became negligible two years after the levee breaches. In contrast to previous laboratory studies, SRP fluxes remained positive, as did fluxes of dissolved iron and manganese. Our results indicate that the timescales of chemical changes following hydrologic reconnection of wetlands are solute-specific and in some cases extend for multiple years beyond the reconnection event. During the present study, colonization of the reconnected wetlands by aquatic benthic invertebrates gradually generated assemblages similar to those in a nearby wetland refuge and provided further evidence of the multiyear transition of this area to permanent aquatic habitat. Such timescales should be considered when developing water-quality management strategies to achieve wetland-restoration goals.

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Section: Hypothesis 3: Temporal Changes In Reconnected Wetland Benthisupporting

confidence: 57%

Section: Hypothesis 3: Temporal Changes In Reconnected Wetland Benthimentioning

confidence: 99%

Changes in benthic nutrient sources within a wetland after hydrologic reconnection

Kuwabara

Topping

Carter

et al. 2012

Enviro Toxic and Chemistry

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“…Other studies (Boon 2006;Aldous et al 2007) have shown that there may already be an immediate release of P within the first 48 h of flooding due to redox processes or microbial lysis. There was a significant interaction with the concentration of Olsen P, as HAY showed a much stronger response in algal development than PAS (p \ 0.05).…”

Section: Effects Of Inundation On Biogeochemistrymentioning

confidence: 98%

Effects of summer flooding on floodplain biogeochemistry in Poland; implications for increased flooding frequency

Banach

Visser

et al. 2009

Biogeochemistry

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The frequency of summer flood events has strongly increased in Eastern Europe during the last decades. The creation of water storage areas to avoid flooding is often combined with the recreation of more natural and biodiverse riverine systems. This urges the need to understand the consequences of summer inundation, when microbial activity is significantly higher than during winter inundation, for floodplain biogeochemistry. In order to test the interacting effects of temporal flooding, water quality and agricultural use we used a mesocosm design with sods including vegetation from an area along a tributary of the Vistula River, where water storage compartments have been planned. Concentrations of nitrate and sulphate in the flood water, expected to interfere with soil redox processes, were varied at environmentally relevant concentrations. Inundation led to increased nutrient mobilization in all treatments, particularly for phosphate which reached very high concentrations in both soil water (200-300 lmol l -1 ) and overlaying surface water (25-35 lmol l -1 ) as a result of iron reduction. The response was clearly linked to different soil characteristics like the Olsen P concentration, probably caused by varying kind of land use. Unexpectedly, the flood water quality played a less important role in the response to shortterm flooding. This could partly be explained by the relatively low infiltration rate into these waterlogged soils, indicating the importance of local hydrology. The findings of this study are important to understand and predict the effects of (more frequent) summer flooding of Eastern European rivers. It also indicates that it is necessary to take into account the soil quality in assessing the consequences of planned measures on biodiversity and ecosystem functioning.

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“…These approaches range from less invasive techniques such as manipulating vegetation (Andersen et al, 2006;Smith et al, 2011), to more intensive techniques such as restoring hydrology (Acreman et al, 2007) or ecosystem maintenance through prescribed fire (Doren et al, 1991;Hamman et al, 2008). Wetlands which have accumulated excess nutrients, such as agricultural lands, are commonly targeted for mitigation (Aldous et al, 2007;Van Dijk et al, 2004). One of the restoration techniques to remove excess nutrients is topsoil removal (Klimkowska et al, 2007;Ross et al, 1982;Tallowin and Smith, 2001;Verhagen et al, 2001) which can include the extreme condition of complete soil removal (CSR) to bedrock (Dalrymple et al, 2003).…”

Section: Introductionmentioning

confidence: 99%

Patterns and controls of anaerobic soil respiration and methanogenesis following extreme restoration of calcareous subtropical wetlands

Medvedeff

Inglett

2015

Geoderma

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Soil phosphorus release from a restoration wetland, Upper Klamath Lake, Oregon

Cited by 57 publications

References 25 publications

Changes in benthic nutrient sources within a wetland after hydrologic reconnection

Changes in benthic nutrient sources within a wetland after hydrologic reconnection

Effects of summer flooding on floodplain biogeochemistry in Poland; implications for increased flooding frequency

Patterns and controls of anaerobic soil respiration and methanogenesis following extreme restoration of calcareous subtropical wetlands

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