Natural Water and Chemical Budgets for a Small Precambrian Lake Basin in Central Canada

Schindler, D. W.; Newbury, R. W.; Beaty, K. G.; Campbell, P.

doi:10.1139/f76-297

Cited by 164 publications

(68 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Few atmospheric deposition P data are available for the area covered by northern peatlands but currently fall in the range of 7 to 34 mg m À2 yr À1 [Newman, 1995;Schindler et al, 1976; R. Vet, Environment…”

Section: 1002/2014gb005000mentioning

confidence: 99%

The stoichiometry of carbon and nutrients in peat formation

Wang

Moore

Talbot

et al. 2015

Global Biogeochemical Cycles

View full text Add to dashboard Cite

Northern peatlands have stored large amounts (~500 Pg) of carbon (C) since the last glaciation.Combined with peat C are nutrients such as nitrogen (N), phosphorus (P), calcium (Ca), magnesium (Mg), and potassium (K), each of which plays an important role in plant production, litter decomposition, and the biogeochemical functioning of peatlands. Yet little attention has been given to the amounts of these nutrients stored in northern peatlands and their stoichiometry with C. Here we use data on nutrient concentrations in over 400 peat profiles in Ontario, Canada, representing bogs, fens, and swamps and their vegetation. We show that the C:N ratio is high (>40:1) in vegetation and litter but declines through the peat profiles to reach ratios between 22:1 and 29:1 in peat below 50 cm. In contrast, the C:P ratio rises from vegetation and litter (500:1 to 1300:1) to 1500:1 to 2000:1 in the lower part of the peat profile. Ratios of C to Ca, Mg, and K vary with peatland type. Most of these stoichiometric changes occur in the early stages of organic matter decomposition, where the litter structure remains intact. We estimate that~18 Pg of N has been stored in northern peatlands since deglaciation, reflecting high N accumulation rates (~0.8 g m À2 yr À1), whereas P accumulation is small (~0.3 Pg,~0.016 g m À2 yr À1), indicating that P is quickly recycled in the surface layers.

show abstract

Section: 1002/2014gb005000mentioning

confidence: 99%

The stoichiometry of carbon and nutrients in peat formation

Wang

Moore

Talbot

et al. 2015

Global Biogeochemical Cycles

View full text Add to dashboard Cite

show abstract

“…Findings of the few studies of lakes that have attempted a comprehensive evaluation of groundwater seepage by the flow net approach indicate a wide range of conditions is possible, from lakes where groundwater contribution is negligible [Malueg et al, 1975;Schindler et al, 1976] to those where groundwater seepage is a major component of water and chemical balances [Brown and Cherkauer, 1992;LaBaugh et al, 1995]. The flow net approach will continue to be beyond the scope or resources of many lake studies, but the need remains to determine the importance of all components contributing to the chemical mass balance of lakes [Dillon et al, 1993].…”

Section: Paper Number 97wr02427mentioning

confidence: 99%

Hydrological and chemical estimates of the water balance of a closed‐basin lake in north central Minnesota

LaBaugh¹,

Winter²,

Rosenberry³

et al. 1997

Water Resources Research

View full text Add to dashboard Cite

Abstract. Chemical mass balances for sodium, magnesium, chloride, dissolved organic carbon, and oxygen 18 were used to estimate groundwater seepage to and from Williams Lake, Minnesota, over a 15-month period, from April 1991 through June 1992. Groundwater seepage to the lake and seepage from the lake to groundwater were determined independently using a flow net approach using data from water table wells installed as part of the study. Hydrogeological analysis indicated groundwater seepage to the lake accounted for 74% of annual water input to the lake; the remainder came from atmospheric precipitation, as determined from a gage in the watershed and from nearby National Weather Service gages. Seepage from the lake accounted for 69% of annual water losses from the lake; the remainder was removed by evaporation, as determined by the energy budget method. Calculated annual water loss exceeded calculated annual water gain, and this imbalance was double the value of the independently measured decrease in lake volume. Seepage to the lake determined from oxygen 18 was larger (79% of annual water input) than that determined from the flow net approach and made the difference between calculated annual water gain and loss consistent with the independently measured decrease in lake volume. Although the net difference between volume of seepage to the lake and volume of seepage from the lake was 1% of average lake volume, movement of water into and out of the lake 'by seepage represented an annual exchange of groundwater with the lake equal to 26-27% of lake volume. Estimates of seepage to the lake from sodium, magnesium, chloride, and dissolved organic carbon did not agree with the values determined from flow net approach or oxygen 18. These results indicated the importance of using a combination of hydrogeological and chemical approaches to define volume of seepage to and from Williams Lake and identify uncertainties in chemical fluxes. Investigations of lakes that have included detailed hydrolog-2799

show abstract

“…At such a ratio, precipitation supplies about 50% of the total nitrogen and phosphorus to lakes, with catchments supplying the other 50%. Despite the catchment's larger size, removal of these nutrients by forest and wetland vegetation usually decreases yields to water by 90% or so (Schindler et al 1976). Typically, the nitrogen and phosphorus released from catchments to lakes is >80% in dissolved, organic form.…”

Section: Introductionmentioning

confidence: 99%

Sustaining Aquatic Ecosystems in Boreal Regions

Schindler¹

1998

View full text Add to dashboard Cite

Few boreal waters are managed in a sustainable manner, because cumulative effects of a variety of human activities are not considered. Fisheries and water quality have declined in most large water bodies of the southern boreal zone. Some of the reasons are direct, including overexploitation of fisheries, alteration of flow patterns, introductions of non-native species, and discharge of eutrophying nutrients and persistent contaminants. However, improper management of watersheds and airsheds also causes degradation of aquatic ecosystems. Clear-cut logging, climatic warming, acid precipitation, and stratospheric ozone depletion are among the more important of these indirect stressors. There are important interactions among these stressors, requiring that they not be treated in isolation. Ecological sustainability of boreal waters would require that exploitation of all parts of the boreal landscape be much lower than it is at present. Unfortunately, management for sustainability is lagging far behind scientific understanding in most countries.

show abstract

Natural Water and Chemical Budgets for a Small Precambrian Lake Basin in Central Canada

Cited by 164 publications

References 24 publications

The stoichiometry of carbon and nutrients in peat formation

The stoichiometry of carbon and nutrients in peat formation

Hydrological and chemical estimates of the water balance of a closed‐basin lake in north central Minnesota

Sustaining Aquatic Ecosystems in Boreal Regions

Contact Info

Product

Resources

About