Alkalinity, Discharge, Average Velocity, and Invertebrate Drift Concentration in Subarctic Alaskan Streams

LaPerriere, Jacqueline D.

doi:10.1080/02705060.1983.9664586

Cited by 27 publications

(16 citation statements)

References 14 publications

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“…The dilution of invertebrate drift concentration at high discharge was expected, since there were few shallow riffle areas in the study area, and the wetted perimeter did not change substantially at different flows. Drift concentrations were inversely related to discharge in studies reported by Minshall & Winger (1968), Hinckley &Kennedy (1973), andLaPerriere (1983). Armitage (1977) reported a significant inverse relationship between discharge and drift density in the unregulated Maize Beck, but the relationship was not significant in the regulated River Tees where discharge fluctuations were smaller.…”

Section: Effects Of Flow Changes On Invertebrate Drift In the Flatheamentioning

confidence: 85%

“…during the reference test when discharge was continued at full generation). It is probable that the inverse relation between discharge and invertebrate drift concentration was a result of dilution of drift concentrations at higher discharges, since the substrate-water interface varies as the square root of the discharge and is similar for widely varying discharges (LaPerriere, 1983).…”

Section: Effects Of Experimental Flow Regulation On Midstream Invertementioning

confidence: 99%

“…Macroinvertebrate drift during increasing discharges may be largely a result of mechanical dislodgement of invertebrates from the substrate by the current, and thus may be essentially the same as sediment transport (LaPerriere, 1983).…”

Section: Effects Of Flow Changes On Invertebrate Drift In the Flatheamentioning

confidence: 99%

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Effects of experimental flow regulation on invertebrate drift and stranding in the Flathead and Kootenai Rivers, Montana, USA

Perry

1986

Hydrobiologia

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Studies were conducted to determine the effects of experimental manipulations of discharge on invertebrate drift in two regulated rivers in northwestern Montana, USA. During these studies the discharge regime in the Flathead River was characterized by frequent flow fluctuations, while in the Kootenai River high discharge was maintained for much longer periods before flow was reduced to minimum discharge. The magnitude of the response of invertebrates to disturbance was different in the two rivers, in part because of the different frequencies of flow changes. Midstream invertebrate drift increased an order of magnitude during increasing discharges in the Flathead River but was not substantially increased during decreasing discharges. When the prior discharge regime had been sustained at high levels in the Kootenai River, invertebrate drift densities as high as 300000/100 m 3 were measured along the shoreline following reductions in discharge, both immediately after flow began to decrease and after dark on the same day. There was also more recolonization of shoreline areas and more stranding of insects following dewatering of nearshore regions when there had been sustained high discharge levels prior to the flow reduction. More insect stranding occurred during a faster rate of decrease in discharge (50000 to 100000 organisms m-2).

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Section: Effects Of Flow Changes On Invertebrate Drift In the Flatheamentioning

confidence: 85%

Section: Effects Of Experimental Flow Regulation On Midstream Invertementioning

confidence: 99%

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Effects of experimental flow regulation on invertebrate drift and stranding in the Flathead and Kootenai Rivers, Montana, USA

Perry

1986

Hydrobiologia

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“….Other studies have demonstrated positive relationships between alkalinity and various macroinvertebrate community parameters across a broad geographical range . For example,LaPerriere (1983) found significant correlations between drift density and alkalinity in 13 Alaskan streams . Although an increase in inver-…”

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confidence: 99%

Benthos and macroinvertebrate drift in six streams differing in alkalinity

1996

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The productive capacity of aquatic systems often is equated with the `chemical richness' of the water . A primary objective of the present study was to relate macroinvertebrate benthos and drift to a streams' productive capacity as indicated by absolute levels of alkalinity . We tested this relationship in six 2nd-3rd order tributaries of the Salmon River, Idaho that ranged in alkalinity from 50 to 360 mg 1 -1 . Benthic density and biomass, drift biomass, and benthic organic matter increased with increasing levels of alkalinity, although not all relationships were significant . The proportion of drift biomass to benthic biomass was similar among study streams suggesting that drift was primarily passive during the study period . The data suggest that spatial variations in landscape-scale geology may indirectly affect spatial patterns of macroinvertebrate benthic and drift standing crops among streams within a single river basin by mediating lotic chemical richness as found among tributaries of the Salmon River basin .

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“…Jonasson, 1955;Macan, 1958;Malley & Reynolds, 1979). Most investigators of drift have used nets with square mesh openings ranging from about 1000 pm (Cushing, 1964;LaPerriere, 1983) to < 200 pm (Ulfstrand, 1968 ;Smith-Cuffney & Wallace, 1987), and a few have sampled with nets of mesh openings < 100 pm (Clifford, 1972b;Williams, 1980;Williams, 1985). Because much of the early work on drift emphasized relatively large taxa (Waters, 196 1;1962;Elliott, 1967), nets of nearly 500 pm mesh openings were used.…”

Section: Introductionmentioning

confidence: 99%

Mesh-size effects on drift sample composition as determined with a triple net sampler

1991

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Nested nets of three different mesh apertures were used to study mesh-size effects on drift collected in a small mountain stream. The innermost, middle, and outermost nets had, respectively, 425 pm, 209 pm and 106 pm openings, a design that reduced clogging while partitioning collections into three size groups. The open area of mesh in each net, from largest to smallest mesh opening, was 3.7, 5.7 and 8.0 times the area of the net mouth. Volumes of filtered water were determined with a flowmeter. The results are expressed as (1) drift retained by each net, (2) drift that would have been collected by a single net of given mesh size, and (3) the percentage of total drift (the sum of the catches from all three nets) that passed through the 425 pm and 209 pm nets. During a two day period in August 1986, Chironomidae larvae were dominant numerically in all 209 ,um and 106 pm samples and midday 425 pm samples. Large drifters (Ephemerellidae) occurred only in 425 pm or 209 pm nets, but the general pattern was an increase in abundance and number of taxa with decreasing mesh size. Relatively more individuals occurred in the larger mesh nets at night than during the day. The two larger mesh sizes retained 70% of the total sediment/detritus in the drift collections, and this decreased the rate of clogging of the 106 pm net. If an objective of a sampling program is to compare drift density or drift rate between areas or sampling dates, the same mesh size should be used for all sample collection and processing. The mesh aperture used for drift collection should retain all species and life stages of significance in a study. The nested net design enables an investigator to test the adequacy of drift samples.

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Alkalinity, Discharge, Average Velocity, and Invertebrate Drift Concentration in Subarctic Alaskan Streams

Cited by 27 publications

References 14 publications

Effects of experimental flow regulation on invertebrate drift and stranding in the Flathead and Kootenai Rivers, Montana, USA

Effects of experimental flow regulation on invertebrate drift and stranding in the Flathead and Kootenai Rivers, Montana, USA

Benthos and macroinvertebrate drift in six streams differing in alkalinity

Mesh-size effects on drift sample composition as determined with a triple net sampler

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