Growth Rate and Biomass Responses of Periphytic Algae to Phosphorus Enrichment in Experimental Flumes, Athabasca River, April and May, 1994

Growth Rate and Biomass Responses of Periphytic Algae to Phosphorus Enrichment in Experimental Flumes, Athabasca River, April and May, 1994
Author: Alec R. Dale
Publisher:
Total Pages: 70
Release: 1995
Genre: Science
ISBN:
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Presents results of an experiment conducted in artificial streams (flumes) in which the growth of periphyton (algae) was studied in relation to phosphorus concentrations in the water. The goal of the study was to determine whether periphyton growth in the Athabasca River was phosphorus limited and whether the degree of phosphorus limitation varied from a similar study conducted in fall 1993. The experimental flumes were located on site, adjacent to the Athabasca River at Hinton. The four-week experiment consisted of four treatments: a control of zero phosphorus addition and three experimental levels of 1, 10, and 25 micrograms per litre of phosphorus. Results include relative specific growth rates as indicated by measuring the build-up of chlorophyll a, the level at which growth rate saturation occurred, and phosphorus concentrations required to reach maximum biomass levels in spring.

Growth Rate and Biomass Responses of Periphytic Algae to Phosphorus Enrichment in Experimental Flumes, Athabasca River, Seasonal Variation, 1993 and 1994

Growth Rate and Biomass Responses of Periphytic Algae to Phosphorus Enrichment in Experimental Flumes, Athabasca River, Seasonal Variation, 1993 and 1994
Author: Alec R. Dale
Publisher:
Total Pages: 66
Release: 1995
Genre: Algae
ISBN:
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Presents results of an experiment conducted in artificial streams (flumes) in which the growth of periphyton (algae) was studied in relation to phosphorus concentrations in the water. The goal of the study was to determine whether periphyton growth in the Athabasca River was phosphorus limited and whether the degree of phosphorus limitation varied seasonally. The experimental flumes were located on site, adjacent to the Athabasca River at Hinton. The experiment was designed to test periphyton growth and biomass response to a gradient of phosphorus additions during fall and early spring. Periphyton response was compared for phosphorus additions of zero (control), 1, 10, and 25 micrograms per litre of phosphorus (spring and fall 1994) or zero, 0.1, 0.2, 1, 5, 10, 25, and 50 micrograms per litre of phosphorus (fall 1993). Results include relative specific growth rates as indicated by measuring the build-up of chlorophyll a, the level at which growth rate saturation occurred, and phosphorus concentrations required to reach maximum biomass levels.

Nutrient Enrichment in the Peace, Athabasca and Slave Rivers

Nutrient Enrichment in the Peace, Athabasca and Slave Rivers
Author: Patricia A. Chambers
Publisher: Canadian Government Publishing
Total Pages: 132
Release: 1996
Genre: Nature
ISBN:
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Synthesises results from research and monitoring studies undertaken to characterise nutrient loading from all point and diffuse sources in northern Alberta river basins. Also evaluates the impacts of nutrient loading on river chemistry, assesses the response of riverine biota to nutrient loading from pulp mill and municipal effluents, quantifies nutrient responses of benthic biota, and investigates interactions between nutrients and contaminants in pulp mill effluents on food webs. The findings are used to assess the state of aquatic ecosystem health and to develop scientific and management recommendations for the northern river basins.

Growth Rate and Biomass Responses of Periphytic Algae to Nutrient Enrichment of Stable and Unstable Substrata, Athabasca River

Growth Rate and Biomass Responses of Periphytic Algae to Nutrient Enrichment of Stable and Unstable Substrata, Athabasca River
Author: Northern River Basins Study (Canada)
Publisher: The Study
Total Pages: 35
Release: 1995
Genre: Algae
ISBN: 9780662234357
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This report presents the results of an experiment conducted in artificial streams in which the growth of benthic algae was studied in relation to the phosphorus and nitrogen concentrations in the water. The goal of the study was to determine whether benthic algal biomass in the upper Athabasca River is limited by the availability of phosphorus or nitrogen. The results include the taxonomic, growth, and biomass responses by periphytic algae to phosphate additions of up to 50 micrograms per liter. The report also develops a model describing change in relative peak biomass with phosphorus addition, using data from the Athabasca experiments. Comparisons are made with a similarly derived model using results from experiments on the South Thompson River.

Northern River Basins Study

Northern River Basins Study
Author: Northern River Basins Study (Canada)
Publisher:
Total Pages: 292
Release: 1996
Genre: Athabasca River Watershed (Alta.)
ISBN:
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Report to the federal ministers of Environment and Indian & Northern Affairs, Alberta's Minister of Environmental Protection, and NWT's Minister of Renewable Resources. Summarises the main scientific findings of the Northern River Basins Study, which was established to examine the relationship between industrial, municipal, agricultural, and other development and the Peace, Athabasca, and Slave River basins. Reviews the characteristics of the northern river basins and their peoples, the organisation of the Study, and major findings in the areas of environmental overview, use of aquatic resources, traditional knowledge, flow regulation, fish distribution and habitat, nutrients, dissolved oxygen, contaminants, drinking water, ecosystem health, modelling, human health, and cumulative effects. Recommendations by the Study Board, First Nations, and scientific advisors regarding such issues as basin management, monitoring, research, public participation, and a successor organisation are then presented. Also includes a summary of opinions, suggestions, and recommendations expressed at 17 community workshops held throughout the northern river basins area.

Phosphorus Control of Algal Production and Biomass in the Thompson River, British Columbia

Phosphorus Control of Algal Production and Biomass in the Thompson River, British Columbia
Author: Max L. Bothwell
Publisher: Saskatoon : National Hydrology Research Centre
Total Pages: 24
Release: 1989
Genre: Algae
ISBN:
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The first phase of the experimental trough research program during 1980-81 established that the higher algal biomass levels in the Thompson River downstream from Kamloops Lake were caused by phosphorus originating from point source discharges near Kamloops. The 2nd phase of the program consisted of extensive controlled phosphorus addition experiments conducted at Chase, B.C. during 1984-86. This report presents the results of those experiments.

A Method Comparison and Stressor-response Experimental Study of Nitrogen and Phosphorus Impacts to Periphyton in Ozark Streams

A Method Comparison and Stressor-response Experimental Study of Nitrogen and Phosphorus Impacts to Periphyton in Ozark Streams
Author: Ashley Renee Rodman
Publisher:
Total Pages: 184
Release: 2016
Genre: Algae
ISBN:
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Stream bioassessment is important for understanding algal-nutrient relationships and the development of scientifically defensible numeric nutrient criteria. However, multiple methods of periphyton data collection are currently used, and little is known about the comparability of resulting datasets. Literature also suggests other factors besides nutrients (i.e. variable grazing, light, and flow) can confound algal-nutrient relationships. A one-year method comparison study and 31-day algal biomass-nutrient manipulative experiment were conducted in the southern Ozarks of Arkansas. The method comparison study was implemented using two common bioassessment procedures (whole-surface and delimiter-reduced periphyton removal) to assess the potential for combining datasets. During the manipulative experiment, cobbles from the Buffalo River Watershed were exposed to a range of phosphorus (P) and nitrogen (N) concentrations during P-only and N + P enrichment periods to evaluate algal biomass responses using recirculating streamside mesocosms. Results of the method comparison study showed no statistical difference between bioassessment procedures for chlorophyll-a (chl-a) and ash-free dry mass (AFDM) (p = 0.123 and p = 0.550, respectively) or any interaction between method and season. Differences in chl-a and AFDM from both methods were detected (p

Oil and Hydrocarbon Spills, Modelling, Analysis and Control

Oil and Hydrocarbon Spills, Modelling, Analysis and Control
Author: R. Garcia-Martinez
Publisher: Computational Mechanics
Total Pages: 392
Release: 1998
Genre: Business & Economics
ISBN:
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This volume contains the proceedings of Oil Spill 1998, and deals with advanced theoretical and practical aspects of oil spills in land and water environments.