Factors Influencing Algal Productivity in Deer Creek Reservoir, Utah

Gaufin, Arden R.; McDonald, Donald B.

doi:10.2307/3224296

Cited by 5 publications

(4 citation statements)

References 1 publication

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“…Wesenberg-Lund, 1908): Lund (1949) showed that the rate of increase in Asterionella cultures was significantly higher at 20°C than at 10°. More recently, Gaufin & McDonald (1965) claimed that the observed decline in numbers of a natural Asterionella population in Deer Creek Reservoir, Utah, was the result of progressive inhibition by temperatures over 15°C; it may be that the decline was attributable to another cause (but see later).…”

Section: Temperaturementioning

confidence: 99%

“…parasitism) was apparently due to loss of cells to greater depths, during the establishment of thermal stratification. It may be that losses through sinking could have been the primary factor in the decline of the Asterionella population recorded by Gaufin & McDonald (1965), which they attributed to direct temperature inhibition.…”

Section: Stratiflcation and Turbulencementioning

confidence: 99%

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The seasonal periodicity of planktonic diatoms in a shallow eutrophic lake

Reynolds

1973

Freshwater Biology

127

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The seasonal periodicity of four species of planktonic diatoms in a small eutrophic lake in the Shropshire-Cheshire Plain, England, is examined. Diatoms typically dominate the spring increase; a second period of growth follows in the summer months. The growth phases are considered in relation to environmental factors in the mere. Of these, light levels appear to be critical in determining the onset of growth and the size of the population maxima, whilst stratification and turbulence play a leading role in the vertical distribution of the algae, and hence, of the growth conditions to which they are exposed. The thermocline is believed to provide a reservoir of diatoms in summer, maintaining them in a position where they are able to gain maximum advantage from increased wind-induced turbulence. Relative specific differences in growth requirements and in behaviour under varying physical conditions are important in determining which species dominate. Dominance may be modified by the effect of attacks by fungal parasites. It is also shown that, generally, nutrients are present in relative abundance, and only rarely does their availability become a limiting factor. Tt is concluded that diatom growth in this lake is typically subject to physical rather than chemical control.

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Section: Temperaturementioning

confidence: 99%

Section: Stratiflcation and Turbulencementioning

confidence: 99%

The seasonal periodicity of planktonic diatoms in a shallow eutrophic lake

Reynolds

1973

Freshwater Biology

127

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“…This agrees with Desortova's observations that chlorophyll-a content per unit biomass, in this case biovolume, is not constant (Desortová 1981), but fluctuates throughout the year. These data show that the poor correlations observed in the regression analysis, can be is a relationship (Gaufin and McDonald 1965;Kiefer 1973;Jones and Bachmann 1976;Desortová 1981;Felip and Catalan 2000;Wetzel 2001;Brumett 2006).…”

Section: Cell Volume and Chlorophyll Relationshipsmentioning

confidence: 86%

“…As noted, the following algae groups were evaluated: total phytoplankton, chlorophyta, cyanophyta, and diatoms. These algae groups were chosen based on the history of Deer Creek Reservoir and the dominant types of algae present in the samples used in this study (Gaufin and McDonald 1965;David Eckhoff, Alane Boyd et al 2002). All data pairs from the six years were plotted for each site.…”

Section: Discussionmentioning

confidence: 99%

Field Algae Measurements Using Empirical Correlations at Deer Creek Reservoir

Stephens

Obregon²,

Chilton³

et al. 2011

World Environmental and Water Resources Congress 2011

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Deer Creek Reservoir in Utah has a history of high algae concentrations. Despite recent nutrient reduction efforts, seasonal algae continue to present problems. Cost effective, accurate, and comprehensive monitoring is important to understand the reservoir processes driving this problem and characterizing the algae spatial and temporal distributions are an important part of this effort. Current laboratory methods for accurately measuring algae are expensive and time consuming and are based on water samples taken in the field and transported to the laboratory. This approach only provides data for relatively few point samples because of the time and expense of sample collection and analysis. These relatively few samples do not describe the complex spatial and temporal trends in the algal data. Algae exhibit non-uniform distributions, especially in the vertical direction. In situ probes are able to measure chlorophyll-a and provide a less expensive measuring alternative than laboratory methods. These probes provide relatively quick, high resolution vertical profile measurements, which allows for more comprehensive horizontal and temporal sampling. To have confidence in the probe data, good correlations between in situ chlorophyll-a measurements and laboratory algae or chlorophyll measurements are important, but these correlations can be reservoir and time dependant as reservoir conditions change. Therefore, they must be developed for each study site. This study reports on efforts at Deer Creek Reservoir to develop these correlations and provide a general description of the dynamic reservoir algal processes. I found that chlorophylla is weakly correlated to most algae species in the reservoir. However, it correlated well with total phytoplankton biovolume and the dominant algal species, which for this study was the diatom. Variations in correlation strength among the several algae species was assumed to most likely be affected by environmental factors, sample methods, algae species diversity, and the accuracy of the optical chlorophyll-a sensor. The data analysis indicate that the field methods used to obtain laboratory samples may have been a significant source of error because of the difficulty of matching the location of a probe measurement to the location of a sample. Field samples were not taken at the same depths as probe measurements and field samples from two locations were either mixed before laboratory analysis or the sample was a composite over a 2meter range. Based on my observations, I have made several recommendations to improve the accuracy of the correlation between algae and chlorophyll-a.

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Winter phytoplankton communities of Utah Lake, Utah, USA

Squires

Rushforth

1986

Hydrobiologia

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Phytoplankton samples were collected from ice-covered Utah Lake during February and March, 1979 in order to characterize the winter algal flora. These samples were analyzed for presence and abundance of diatoms and non-diatom algae as well as selected water chemical parameters. A total of 159 diatom taxa and 20 non-diatoms was found in the water column under the ice. The flagellates Carteria stellifera, Euglena gracilis and Chlamydomonas globosa dominated the winter non-diatom flora while Stephanodiscus cf. dub&, Cyclotella meneghiniana, Navicula minima, Fragilaria construens var. venter, and Melosira granulata var. angustissima dominated the winter diatom flora. Species richness and abundance were elevated in the major bays of the lake.

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Factors Influencing Algal Productivity in Deer Creek Reservoir, Utah

Cited by 5 publications

References 1 publication

The seasonal periodicity of planktonic diatoms in a shallow eutrophic lake

The seasonal periodicity of planktonic diatoms in a shallow eutrophic lake

Field Algae Measurements Using Empirical Correlations at Deer Creek Reservoir

Winter phytoplankton communities of Utah Lake, Utah, USA

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