The effects of selected physical and chemical factors on attached diatoms in the Uintah Basin of Utah, U.S.A.

Evenson, William E.; Rushforth, Samuel R.; Brotherson, Jack D.; Fungladda, N.

doi:10.1007/bf00008283

Cited by 12 publications

(5 citation statements)

References 3 publications

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“…In this study no relationship was found between concentrations of nutrients in the water and biofilm state and, while several studies have highlighted the importance of nutrients in determining algal biomass (Everson et al . 1981;Peterson et al .…”

Section: Discussioncontrasting

confidence: 72%

Temporal and spatial variation in the epilithic biofilm of an acid stream

Ledger

Hildrew

1998

Freshwater Biology

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Summary 1. The extent of spatial and temporal variation, and the taxonomic and biochemical composition of epilithic biofilm were determined in a first‐order, acidic stream in the Ashdown Forest, southern England. 2. The biofilm had an autotrophic component consisting of acidobiontic diatoms, small coccoid green algae, zygnematacean filamentous green algae, and a heterotrophic component of bacteria. Fungi were absent. 3. Diatoms were the dominant algal group in spring. These were succeeded by coccoid green algae in summer. Synchronous variation existed between algae and bacteria, suggesting a strong link between the two groups. 4. Quantitative community descriptors (algal and bacterial densities, chlorophyll, ash‐free dry matter) and biochemical descriptors (protein, lipid and carbohydrate content) of biofilm presented a consistent temporal pattern in which biofilm biomass peaked in spring and early summer and decreased subsequently. 5. Stepwise multiple regression revealed that temporal variation in the quantity of biofilm coating substrata was primarily associated with photosynthetically active radiation. The quantity of biofilm coating the upper surfaces of substrata increased with substratum particle size (small stones, large stones and bedrock). Smothering of algae by fine particulate organic matter, proximal shading by bed sediments, and physical disturbance are proposed as mechanisms that brought about the pattern.

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Section: Discussioncontrasting

confidence: 72%

Temporal and spatial variation in the epilithic biofilm of an acid stream

Ledger

Hildrew

1998

Freshwater Biology

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“…(Evenson et al, 1981) . We have additionally shown that such responses may relate to seasonal differences .…”

Section: Indicator Speciesmentioning

confidence: 99%

“…Baumann & Wingett (1975) studied the water quality and fauna of the White River, Uintah County, Utah . Algal studies have been performed by Johansen (1974), Johansen & Rushforth (in press), and Evenson et a!. Algal studies have been performed by Johansen (1974), Johansen & Rushforth (in press), and Evenson et a!.…”

Section: Introductionmentioning

confidence: 99%

The effects of dissolved heavy metals on attached diatoms in the Uintah Basin of Utah, U.S.A.

et al. 1981

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The relationships of diatom species to dissolved heavy metals in the streams of the Uintah Basin of Utah were studied through four seasons of 1977-1978 . Niche center gradient analysis, cluster analysis and correlation analysis were performed . Achnanthes minutissima, Cyclotella meneghiniana, Cymbella minuta, Gomphonema parvulum, Navicula secreta var . apiculata, Nitzschia frustulum, Nitzschia frustulum var . perminuta, Nitzschia frustulum var . perpusilla, Nitzschia palea, and Synedra ulna appear to be indicator species of high or low heavy metal concentrations . Several other species also showed meaningful relationships to high or low heavy metal concentrations .

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“…Many studies have related diatom community composition to environmental variation (e.g. Evenson et al ., 1981; Chessman, 1986; Sabater, Sabater & Armengol, 1988; Ten Cate, Maasdam & Roijackers, 1993; Leland, 1995; Pan et al ., 1996), but few have specifically focused on the effects of urbanization. Most studies investigating urban effects on diatom communities have been conducted in cities where sanitary sewage is a large component of runoff into the receiving streams (Nather Khan, 1990; Lobo, Katoh & Aruga, 1995).…”

Section: Introductionmentioning

confidence: 99%

Effects of urbanization on streams of the Melbourne region, Victoria, Australia. II. Benthic diatom communities

et al. 2001

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1. Epilithic and epiphytic diatom community composition were assessed in small streams of the Melbourne region to test the effects of (a) urban density (sub‐catchment imperviousness 0–51%) and (b) stormwater drainage intensity (comparing the intensively drained metropolitan area with urban areas of the hinterland, which had open drains and some localized stormwater drainage). 2. Communities separated into three groups: eastern hinterland, western hinterland and a metropolitan group. Separation of eastern and western hinterland groups, and of eastern and western sites within the metropolitan group were best explained by patterns of electrical conductivity, basalt geology and annual rainfall. Separation of metropolitan and hinterland groups, and patterns within the hinterland groups were best explained by nutrient gradients (phosphorus, ammonia and total nitrogen). 3. Nutrient concentrations were not only apparently influenced by urban density but also by effluents from small sewage treatment plants and agricultural activities at a few sites. 4. Species richness did not vary consistently between the metropolitan and hinterland groups but within the western hinterland, sites with low nutrient concentrations tended to be more species‐rich than mildly enriched sites. 5. Composition of both diatom and macroinvertebrate communities (assessed in a concurrent study) were sensitive indicators of urban‐derived impacts. However, diatoms were better indicators of nutrient enrichment, while macroinvertebrates were better integrative indicators of catchment disturbance.

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The effects of selected physical and chemical factors on attached diatoms in the Uintah Basin of Utah, U.S.A.

Cited by 12 publications

References 3 publications

Temporal and spatial variation in the epilithic biofilm of an acid stream

Temporal and spatial variation in the epilithic biofilm of an acid stream

The effects of dissolved heavy metals on attached diatoms in the Uintah Basin of Utah, U.S.A.

Effects of urbanization on streams of the Melbourne region, Victoria, Australia. II. Benthic diatom communities

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