Nutrient supply rates in a boreal extreme‐rich fen using ion exchange membranes

Hartsock, Jeremy A.; Bremer, E.

doi:10.1002/eco.1995

Cited by 5 publications

(8 citation statements)

References 46 publications

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“…Based on comparisons of 2‐ and 20‐day burial periods, PRS probes generally behaved as a sink when ion concentrations in porewater were very low (PF) and generally behaved as an ion exchanger when ion concentrations were elevated (SHF and SF). These results are consistent with a previous study in an extreme‐rich fen where most nutrients were at or approaching equilibrium within 24 hr on PRS probes buried for 2, 24, and 384 hr (Hartsock & Bremer, ). Similarly, maximum nutrient adsorption occurred within 1 to 7 days for PRS probes deployed in the capillary fringe of a streambank for 0.2 to 14 days (Miller, Bremer, & Curtis, ).…”

Section: Discussionsupporting

confidence: 92%

“…Conditions favorable to rapid equilibration also favor ion desorption during burial, as observed for potassium, iron, and manganese in this study and for potassium in an extreme‐rich fen (Hartsock & Bremer, ). Desorption occurs when ions in solution have a higher affinity and/or activity than resin‐adsorbed ions.…”

Section: Discussionsupporting

confidence: 74%

“…Our PRS probe experiment was designed to assess ion-exchange membrane behavior across a wide range of environmental conditions at natural sites and at the SHF experimental watershed. Based on or approaching equilibrium within 24 hr on PRS probes buried for 2, 24, and 384 hr (Hartsock & Bremer, 2018). Similarly, maximum nutrient adsorption occurred within 1 to 7 days for PRS probes deployed in the capillary fringe of a streambank for 0.2 to 14 days (Miller, Bremer, & Curtis, 2016).…”

Section: Nutrient Adsorption By Prs Probesmentioning

confidence: 88%

“…Mg ratios for 20-day burials ranged from 2.8 to 6.5, about threefold higher than porewater observations (excluding the PF). Similarly, the Ca: Mg ratio in an extreme-rich fen was 5.5 on PRS probes (16-day burial) and 2.4 in porewater (Hartsock & Bremer, 2018). The ratios among ions adsorbed by any natural or synthetic ion-exchange surface are influenced by ion selectivity.…”

Section: Nutrient Adsorption By Prs Probesmentioning

confidence: 98%

“…Here, we monitor all peatland classes listed above except extreme-rich fens (cf. Hartsock & Bremer, 2018).…”

Section: Peatlands Backgroundmentioning

confidence: 99%

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Nutrient supply patterns across the Sandhill Fen reclamation watershed and regional reference fens in Alberta, Canada: An ion exchange membrane study

Hartsock

Bremer²,

Vitt

2020

Ecohydrology

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Using Plant Root Simulator (PRS®) probes, we evaluate nutrient supply rates at the Sandhill Fen reclamation watershed across a gradient of increasing water table position and compare observations with three reference fens (a poor, moderate‐rich, and saline fen). Our objectives were threefold: (a) determine the behavior of PRS probes across multiple peatland classes, (b) determine which type of peatland Sandhill Fen is most analogous to in terms of nutrient supply patterns and site chemistry, and (c) attempt to provide a repeatable approach for assessing nutrient supply in peatlands. In terms of porewater chemistry, conditions at Sandhill Fen were quite unique, yet, most comparable to the saline fen. Consistent with porewater analysis, PRS probes had low nitrate supply at all sites, high calcium and magnesium supply at all sites (except the poor fen), and much higher sulfur supply at Sandhill Fen. Site differences in PRS probe measurements were smaller for 20‐ than 2‐day burial periods due to displacement of less strongly held elements (e.g., potassium) on ion exchange membranes. Because long‐term incubations may underrepresent supply rates for weakly held ions due to displacement by divalent ions, we recommend that reclamation assessments over a wide range of fen types should use a relatively short burial period of 1 to 3 days. With few exceptions (sulfate and iron), nutrient supply patterns at Sandhill Fen were quite comparable to the reference fens. For future wetland reclamation performance assessments in the AOSR, PRS probes could serve an important role for evaluating belowground functional components.

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Section: Discussionsupporting

confidence: 92%

Section: Discussionsupporting

confidence: 74%

Section: Nutrient Adsorption By Prs Probesmentioning

confidence: 88%

Section: Nutrient Adsorption By Prs Probesmentioning

confidence: 98%

“…Here, we monitor all peatland classes listed above except extreme-rich fens (cf. Hartsock & Bremer, 2018).…”

Section: Peatlands Backgroundmentioning

confidence: 99%

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Nutrient supply patterns across the Sandhill Fen reclamation watershed and regional reference fens in Alberta, Canada: An ion exchange membrane study

Hartsock

Bremer²,

Vitt

2020

Ecohydrology

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An evaluation of water quality at Sandhill Wetland: implications for reclaiming wetlands above soft tailings deposits in northern Alberta, Canada

Hartsock

Piercey

House

et al. 2021

Wetlands Ecol Manage

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The experimental Sandhill Wetland is the first permanent reclamation of a composite tailings deposit, and annual water quality monitoring is of specific interest for evaluating and predicting long-term reclamation performance. Here, we present water chemistry monitoring data obtained from Sandhill Wetland (years 2009–2019) and compare results to twelve natural reference wetlands and to environmental quality guidelines for Alberta surface waters. By comparing water quality at Sandhill Wetland and natural sites to established guidelines, we can begin to document the natural background water quality of wetlands in the region and examine if guideline exceedances are seen in natural undisturbed environments, or appear only at active reclamation sites. At Sandhill Wetland the dominant ions in near-surface water were bicarbonate, sulfate, chloride, sodium, calcium, and magnesium. Since the first growing season concentrations for these ions have increased annually, causing concurrent increases in electrical conductivity. In year 2019, water chemistry at Sandhill Wetland was most comparable to regional saline fens, systems that exhibit elevated electrical conductivity and high sodicity. Near-surface water at Sandhill Wetland exceeded water quality guidelines for three substances/properties (dissolved chloride, iron, and total alkalinity) in the most recent year of monitoring. The saline fen natural sites also exceeded water quality guidelines for the same chemical substances/properties, suggesting guideline exceedances are a norm for some natural wetland site types in the region. Of note, in each year of monitoring at Sandhill Wetland, dissolved organic compounds evaluated in sub- and near-surface water were below detection limits.

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Comparison of Soil Nutrient Supply Patterns among Full and Drained Beaver Ponds and Undisturbed Peat in a Rocky Mountain Fen

Munir

Westbrook

2022

Wetlands

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Nutrient supply rates in a boreal extreme‐rich fen using ion exchange membranes

Cited by 5 publications

References 46 publications

Nutrient supply patterns across the Sandhill Fen reclamation watershed and regional reference fens in Alberta, Canada: An ion exchange membrane study

Nutrient supply patterns across the Sandhill Fen reclamation watershed and regional reference fens in Alberta, Canada: An ion exchange membrane study

An evaluation of water quality at Sandhill Wetland: implications for reclaiming wetlands above soft tailings deposits in northern Alberta, Canada

Comparison of Soil Nutrient Supply Patterns among Full and Drained Beaver Ponds and Undisturbed Peat in a Rocky Mountain Fen

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