Hydrological Connectivity and Basin Morphometry Influence Seasonal Water-Chemistry Variations in Tundra Ponds of the Northwestern Hudson Bay Lowlands

White, Jerry; Hall, Roland I.; Wolfe, Brent B.; Light, Erin M.; Macrae, Merrin L.; Fishback, LeeAnn

doi:10.1657/1938-4246-46.1.218

Cited by 19 publications

(27 citation statements)

References 58 publications

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“…5). This is in contrast to observations from the western HBL, where declines in concentrations of suspended solids and nutrients (e.g., total Kjeldahl nitrogen) were reported in lakes as hydrological connectivity was lost during periods of lower water levels and low flow (White et al, 2014). As suggested by Welch and Legault (1986) for high solute lakes near the northwestern shore of Hudson Bay, residual sea salt in the local catchments of these relatively young lakes may have resulted in both higher salinities and increased phosphorus inputs.…”

Section: Discussioncontrasting

confidence: 99%

“…The relatively high alkalinity and conductivity of the shallow lakes may also be influenced, in part, by evaporative enrichment at the time of sampling in mid-summer. White et al (2014) observed distinct, seasonal changes in water chemistry in ponds near Churchill, Ontario, with the concentrations of major ions peaking in the summer months, and stabilizing or declining following replenishment by precipitation events in late summer.…”

Section: Discussionmentioning

confidence: 96%

“…Symons et al, 2012Symons et al, , 2014, despite their recognition as essential components of environmental assessments in other lake regions (Schindler, 1978;Yan et al, 2008). Existing surveys of water chemistry from shallow tundra ponds in Wapusk National Park (Bos and Pellatt, 2012) and from within the Churchill Wildlife Management Area (White et al, 2014), both in northern Manitoba, reveal that morphometry (i.e. depth) and catchment vegetation are important predictors of variation in chemistry between lakes.…”

Section: Introductionmentioning

confidence: 99%

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Spatial, Environmental, and Biotic Determinants of Zooplankton Community Composition in Subarctic Lakes and Ponds in Wapusk National Park, Canada

Symons

Pedruski

Arnott

et al. 2014

Arctic, Antarctic, and Alpine Research

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Section: Discussioncontrasting

confidence: 99%

Section: Discussionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

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Spatial, Environmental, and Biotic Determinants of Zooplankton Community Composition in Subarctic Lakes and Ponds in Wapusk National Park, Canada

Symons

Pedruski

Arnott

et al. 2014

Arctic, Antarctic, and Alpine Research

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“…1). These ponds were selected for their range in surface areas, perimeter, catchment area, and depth because they have been the subject of long-term research in the area and have been shown to be representative of a range of chemical and hydrological properties (Table 1; Macrae et al, 2004;White et al, 2014;Wolfe et al, 2011;Bos and Pellatt, 2012). Each pond was sampled regularly (every 14 days) throughout the ice-free season of 2015, from day of year (DOY) 140 to 300 (May to October).…”

Section: Study Site and Sampling Designmentioning

confidence: 99%

“…Mazurek et al (2012) sampled shallow ponds over several summer seasons in Svalbard and found ionic concentrations increasing in ponds over the summer months, coincident with pond drying. White et al (2014) monitored ponds at three time steps over the ice-free season and related pond seasonal biogeochemical trajectories to pond morphology and pond-peatland connectivity. Given the significant control of hydrological processes on pond biogeochemistry, and the highly variable hydrological conditions experienced by ponds within a single season, an improved understanding of seasonal patterns of pond hydrochemistry is needed to better understand potential pond responses to climate change.…”

Section: Introductionmentioning

confidence: 99%

Capturing temporal and spatial variability in the chemistry of shallow permafrost ponds

et al. 2017

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Abstract. Across the circumpolar north, the fate of small freshwater ponds and lakes ( < 1 km 2 ) has been the subject of scientific interest due to their ubiquity in the landscape, capacity to exchange carbon and energy with the atmosphere, and their potential to inform researchers about past climates through sediment records. A changing climate has implications for the capacity of ponds and lakes to support organisms and store carbon, which in turn has important feedbacks to climate change. Thus, an improved understanding of pond biogeochemistry is needed. To characterize spatial and temporal patterns in water column chemistry, a suite of tundra ponds were examined to answer the following research questions: (1) does temporal variability exceed spatial variability? (2) If temporal variability exists, do all ponds (or groups of ponds) behave in a similar temporal pattern, linked to seasonal hydrologic drivers or precipitation events? Six shallow ponds located in the Hudson Bay Lowlands region were monitored between May and October 2015 (inclusive, spanning the entire open-water period). The ponds span a range of biophysical conditions including pond area, perimeter, depth, and shoreline development. Water samples were collected regularly, both bimonthly over the ice-free season and intensively during and following a large summer storm event. Samples were analysed for nitrogen speciation (NO − 3 , NH + 4 , dissolved organic nitrogen) and major ions (Cl − , SO 2− 4 , K + , Ca 2+ , Mg 2+ , Na + ). Across all ponds, temporal variability (across the season and within a single rain event) exceeded spatial variability (variation among ponds) in concentrations of several major species (Cl − , SO 2− 4 , K + , Ca 2+ , Na + ). Evapoconcentration and dilution of pond water with precipitation and runoff inputs were the dominant processes influencing a set of chemical species which are hydrologically driven (Cl − , Na + , K + , Mg 2+ , dissolved organic nitrogen), whereas the dissolved inorganic nitrogen species were likely mediated by processes within ponds. This work demonstrates the importance of understanding hydrologically driven chemodynamics in permafrost ponds on multiple scales (seasonal and event scale).

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Limnological regime shifts caused by climate warming and Lesser Snow Goose population expansion in the western Hudson Bay Lowlands (Manitoba, Canada)

MacDonald

Farquharson

Merritt

et al. 2015

Ecology and Evolution

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Shallow lakes are dominant features in subarctic and Arctic landscapes and are responsive to multiple stressors, which can lead to rapid changes in limnological regimes with consequences for aquatic resources. We address this theme in the coastal tundra region of Wapusk National Park, western Hudson Bay Lowlands (Canada), where climate has warmed during the past century and the Lesser Snow Goose (LSG; Chen caerulescens caerulescens) population has grown rapidly during the past ∽40 years. Integration of limnological and paleolimnological analyses documents profound responses of productivity, nutrient cycling, and aquatic habitat to warming at three ponds (“WAP 12”, “WAP 20”, and “WAP 21″), and to LSG disturbance at the two ponds located in an active nesting area (WAP 20, WAP 21). Based on multiparameter analysis of 210Pb-dated sediment records from all three ponds, a regime shift occurred between 1875 and 1900 CE marked by a transition from low productivity, turbid, and nutrient-poor conditions of the Little Ice Age to conditions of higher productivity, lower nitrogen availability, and the development of benthic biofilm habitat as a result of climate warming. Beginning in the mid-1970s, sediment records from WAP 20 and WAP 21 reveal a second regime shift characterized by accelerated productivity and increased nitrogen availability. Coupled with 3 years of limnological data, results suggest that increased productivity at WAP 20 and WAP 21 led to atmospheric CO2 invasion to meet algal photosynthetic demand. This limnological regime shift is attributed to an increase in the supply of catchment-derived nutrients from the arrival of LSG and their subsequent disturbance to the landscape. Collectively, findings discriminate the consequences of warming and LSG disturbance on tundra ponds from which we identify a suite of sensitive limnological and paleolimnological measures that can be utilized to inform aquatic ecosystem monitoring.

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Hydrological Connectivity and Basin Morphometry Influence Seasonal Water-Chemistry Variations in Tundra Ponds of the Northwestern Hudson Bay Lowlands

Cited by 19 publications

References 58 publications

Spatial, Environmental, and Biotic Determinants of Zooplankton Community Composition in Subarctic Lakes and Ponds in Wapusk National Park, Canada

Spatial, Environmental, and Biotic Determinants of Zooplankton Community Composition in Subarctic Lakes and Ponds in Wapusk National Park, Canada

Capturing temporal and spatial variability in the chemistry of shallow permafrost ponds

Limnological regime shifts caused by climate warming and Lesser Snow Goose population expansion in the western Hudson Bay Lowlands (Manitoba, Canada)

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