Primary Productivity in a Large, Temperate Lake with River Interflow: Kootenay Lake, British Columbia

Jasper, Steve; Carmack, Eddy C.; Daley, Ralph J.; Gray, Colin B. J.; Pharo, Chris H.; Wiegand, Ron C.

doi:10.1139/f83-047

Cited by 13 publications

(11 citation statements)

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“…Primary production was not measured but calculated based on P-I curves. Two incubators were used to determine photosynthetic light curves (for methodology see Jasper et al 1983, Jasper & Bothwell 1986. Each consisted of a plexiglass tank (1.07 m × 0.61 m × 0.30 m) separated into 6 compartments, each holding up to twelve 250 ml clear plastic bottles, and illuminated from below with irradiance determined by a combination of neutral density plexiglass and plastic screens.…”

Section: Methodsmentioning

confidence: 99%

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Phytoplankton productivity on the Canadian Shelf of the Beaufort Sea

Carmack¹,

Macdonald²,

Jasper³

2004

Mar. Ecol. Prog. Ser.

246

214

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Section: Methodsmentioning

confidence: 99%

“…Fig. 2 provides a schematic illustration of the procedure for calculating production in the water column based on 14 C uptake and observed light and chlorophyll a profiles (see Jasper et al 1983, for details). First, the surface PAR value was obtained from the shorebased continuous (10 min interval) record (Fig.…”

Section: Methodsmentioning

confidence: 99%

Phytoplankton productivity on the Canadian Shelf of the Beaufort Sea

Carmack¹,

Macdonald²,

Jasper³

2004

Mar. Ecol. Prog. Ser.

246

214

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“…Incubations began at 1100-l 300 hours and were normally carried out within lo-2°C of ambient river temperature. At the end of l-3 h, fixed 14C was measured by the acid-bubbling technique of Schindler et al (1972) as modified by Jasper et al (1983). Replicate zero time blanks for each sample were acidified and bubbled immediately after 14C addition.…”

Section: Methodsmentioning

confidence: 99%

Phosphorus limitation of lotic periphyton growth rates: An intersite comparison using continuous‐flow troughs (Thompson River system, British Columbia)1

Bothwell

1985

Limnology & Oceanography

152

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Periphyton growth rates and relative degrees of phosphorus deficiency were compared with onsite, continuous-flow troughs in three parts of the Thompson River system. Soluble reactive phosphorus (SRP) in the lower Thompson, North Thompson, and South Thompson Rivers averaged 3.4, 1.1, and 0.7 pg liter-'. Several physiological and chemical composition parameters ranked the degree of P deficiency in the rivers in the same sequence as did SRP. Among these were alkaline phosphatase activity, V,,, for 32P043-uptake, and cellular N:organic P, Chl a:ATP, C:ATP, and C:organic P. Specific growth rates (EL) estimated by biomass accrual and by 14C0, uptake usually, but not always, indicated higher p with greater availability of P. However, relative specific growth rates (p:p,,.J consistently reflected the influence of P limitation. As assessed from N:organic P and by application of the Droop and Goldman-Carpenter equations, p:prnax was 0.8-0.9 at the lower Thompson, 0.3-0.6 at the North Thompson, and 0.0-0.3 at the South Thompson sites. Hence, periphyton growth rates in the lower Thompson River were near the maximum set by temperature and light at ambient SRP of only 3-4 pg liter-l. Evidence of P-limited growth rates in the South Thompson and North Thompson Rivers was found at temperatures approaching 0°C.

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“…Alavian & Ostrowski (1992) studied the effects of river inflows on thermal structure in Tennessee Valley Authority reservoirs. The papers of Jasper et al (1983) about Kootenay Lake, British Columbia; Lambert et al (1984) about Lake Constance and the Wallensee in the Swiss Alps; and Vincent et al (1984Vincent et al ( , 1991 and Gibbs (1992) about Lake Rotoiti, North Island, New Zealand, all provide examples of how in-lake water quality depends on the quantity and quality of river inflows, and also on mixing and flow path of the inflows after they enter a lake. More recently, Loizeau & Dominik (2000) showed how humaninduced changes in the discharge patterns of the Upper Rhone River over the last 80 years have reduced the occurrence of underflows (associated with sediment-laden floods) along the bottom of Lake Geneva.…”

Section: Introductionmentioning

confidence: 99%

Field calibration of a formula for entrance mixing of river inflows to lakes: Lake Taupo, North Island, New Zealand

Spigel¹,

Howard‐Williams²,

Gibbs

et al. 2005

New Zealand Journal of Marine and Freshwater Research

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Field measurements were used to validate predictions for the initial dilution of negatively buoyant, cold-water inflows to Lake Taupo, as part of a study to quantify mixing processes associated with the two largest inflows to the lake. The predictions were made using a formulation originally derived for positively buoyant, warm-water inflows to cooling ponds. The formulation predicts the total dilution of an inflow during its inertia-dominated phase between its entrance to the lake and the point where buoyancy forces are great enough to cause the inflow to plunge and form a submerged density current. In one of the measured inflows, the inflowing jet was free to entrain from both sides; in the other, entrainment was restricted on one side by attachment of the inflowing jet to the shoreline of a bay just upstream of the plunge point. In the former example, the unmodified coefficients from the cooling pond formulation provided an excellent prediction of initial dilution. In the latter example, entrainment was reduced and different coefficients were derived. In both examples the inflows remained attached to the lake bed throughout their course until their liftoff at depths of 45-55 m to form interflows. The difference between coefficients for the two inflows indicates that the coefficient values should be considered site-specific. The formulation is not valid for inflows that separate from the bottom of the inflow channel before plunging. The entrance mixing formulation was incorporated in a more general model of lake stratification, DYRESM, which already includes a well-documented routine for routing underflows down submerged channels on the bed of a lake. Application of the model to the inflows measured in Lake Taupo gave good results for two model outputs that were not involved in the calibration of the entrance mixing formulation, but that are affected by the result of the initial dilution calculation-the temperatures in the river plume after it has plunged, and the insertion depth.

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Primary Productivity in a Large, Temperate Lake with River Interflow: Kootenay Lake, British Columbia

Cited by 13 publications

References 0 publications

Phytoplankton productivity on the Canadian Shelf of the Beaufort Sea

Phytoplankton productivity on the Canadian Shelf of the Beaufort Sea

Phosphorus limitation of lotic periphyton growth rates: An intersite comparison using continuous‐flow troughs (Thompson River system, British Columbia)1

Field calibration of a formula for entrance mixing of river inflows to lakes: Lake Taupo, North Island, New Zealand

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