Characterizing Hydro-Limnological Relationships in the Shallow Thermokarst Lakes of the Old Crow Flats, Yukon Territory

Balasubramaniam, Ann M.

doi:10.14430/arctic4256

Cited by 3 publications

(2 citation statements)

References 13 publications

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“…At this time, lake waters are supplied by isotopically depleted snowmelt runoff that is rich in dissolved nutrients from interactions with soil and plant organic matter. In OCF, snowmelt‐dominated lakes have higher concentrations of nutrients including dissolved phosphorus, silica, and organic carbon compared to rainfall‐dominated lakes [ Balasubramaniam , ]. Furthermore, incorporation of isotopic signatures from the early ice‐free season by aquatic cellulose has been identified in paired analyses of seasonal δ 18 O lw and surface sediment δ 18 O inf‐lw from other shallow boreal lakes [e.g., Wolfe et al ., ].…”

Section: Discussionmentioning

confidence: 99%

Vulnerability of shallow subarctic lakes to evaporate and desiccate when snowmelt runoff is low

Bouchard

Turner

MacDonald

et al. 2013

Geophysical Research Letters

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Snowmelt is a crucial source of water for many shallow subarctic lakes, but climate models predict that snowfall will decrease in some regions, with profound ecological consequences. Here we use lake water isotope data across gradients of terrestrial vegetation cover (open tundra to closed forest) and topographic relief to identify lakes that are vulnerable to desiccation under conditions of low snowmelt runoff in two subarctic landscapes—Old Crow Flats, Yukon, and Hudson Bay Lowlands, Manitoba (Canada). Lakes located in low‐relief, open tundra catchments in both landscapes displayed a systematic, positive offset between directly measured lake water δ18O over multiple sampling campaigns and lake water δ18O inferred from cellulose in recently deposited surface sediments. We attribute this offset to a strong evaporative 18O‐enrichment response to lower‐than‐average snowmelt runoff in recent years. Notably, some lakes underwent near‐complete desiccation during midsummer 2010 following a winter of very low snowfall. Based on the paleolimnological record of one such lake, the extremely dry conditions in 2010 may be unprecedented in the past ~200 years. Findings fuel concerns that a decrease in snowmelt runoff will lead to widespread desiccation of shallow lakes in these landscapes.

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Section: Discussionmentioning

confidence: 99%

Vulnerability of shallow subarctic lakes to evaporate and desiccate when snowmelt runoff is low

Bouchard

Turner

MacDonald

et al. 2013

Geophysical Research Letters

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show abstract

“…Previous studies have shown that the water balance of shallow northern lakes strongly influences limnology and aquatic ecology, which can be identified using water isotope tracers (Sokal et al, 2008;Balasubramaniam, 2012;Wiklund et al, 2012). Although the hydrogen and oxygen isotope composition of water is well understood as it passes through the hydrological cycle (Clark and Fritz, 1997;Edwards et al, 2004), it has been underutilized as an indicator variable for hydrological monitoring programs.…”

Section: Introductionmentioning

confidence: 99%

Using Water Isotope Tracers to Develop the Hydrological Component of a Long-Term Aquatic Ecosystem Monitoring Program for a Northern Lake-Rich Landscape

Tondu

Turner

Wolfe

et al. 2013

Arctic, Antarctic, and Alpine Research

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Use of artificial-substrate samplers to identify relations between periphytic diatom community composition and hydro-limnological conditions in shallow lakes of Old Crow Flats, Yukon Territory (Canada)

et al. 2021

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Characterizing Hydro-Limnological Relationships in the Shallow Thermokarst Lakes of the Old Crow Flats, Yukon Territory

Cited by 3 publications

References 13 publications

Vulnerability of shallow subarctic lakes to evaporate and desiccate when snowmelt runoff is low

Vulnerability of shallow subarctic lakes to evaporate and desiccate when snowmelt runoff is low

Using Water Isotope Tracers to Develop the Hydrological Component of a Long-Term Aquatic Ecosystem Monitoring Program for a Northern Lake-Rich Landscape

Use of artificial-substrate samplers to identify relations between periphytic diatom community composition and hydro-limnological conditions in shallow lakes of Old Crow Flats, Yukon Territory (Canada)

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