scholarly journals Factors controlling the temporal variability in dissolved oxygen regime of salmon spawning gravels

2012 ◽  
Vol 28 (1) ◽  
pp. 86-103 ◽  
Author(s):  
D. A. Sear ◽  
I. Pattison ◽  
A. L. Collins ◽  
M. D. Newson ◽  
J. I. Jones ◽  
...  
Keyword(s):  
Dissolved Oxygen ◽  
Temporal Variability ◽  
Oxygen Regime

A New Life for the St. Croix River

1988 ◽  
Vol 23 (4) ◽  
pp. 568-577
Author(s):  
Harold S. Bailey
Keyword(s):  
Water Quality ◽  
Dissolved Oxygen ◽  
Discharge Rate ◽  
Paper Mill ◽  
Regulated River ◽  
Secondary Treatment ◽  
Pulp And Paper Mill ◽  
Oxygen Regime ◽  
Oxygen Concentrations

Abstract The water quality of the upper 110 kilometres of the St. Croix River is considered to be pristine. A major industrial discharge renders the lower 14 kilometres of the river a water quality limited segment. Prior to 1970 the Georgia-Pacific Pulp and Paper Mill at Woodland, Maine, discharged untreated effluent directly into the river causing dissolved oxygen concentrations to drop well below 5 mg/L, the objective chosen in the interest of restoring endemic fish populations. Since 1972, the Mill has installed primary and secondary treatment, regulated river discharge rate and effluent composition which has greatly improved the summer dissolved oxygen regime. By 1980, dissolved oxygen concentrations were generally above 5.0 mg/L and restocking the river with Atlantic Salmon (Salmo salar) was initiated.

Minimal Dissolved Oxygen Requirements of Aquatic Life with Emphasis on Canadian Species: a Review

1975 ◽  
Vol 32 (12) ◽  
pp. 2295-2332 ◽  
Author(s):  
John C. Davis
Keyword(s):  
Dissolved Oxygen ◽  
Water Body ◽  
Physical Factors ◽  
Seasonal Temperature ◽  
Low Oxygen ◽  
Aquatic Life ◽  
Invertebrate Species ◽  
Oxygen Regime ◽  
Response Thresholds ◽  
Oxygen Requirements

This article reviews the sensitivity, responses, response thresholds, and minimum oxygen requirements of marine and freshwater organisms with strong emphasis on Canadian species. The analysis attempts to define low dissolved oxygen thresholds which produce some physiological, behavioral, or other response in different species.Oxygen availability is discussed with reference to seasonal, geographical, or spatial variation in dissolved oxygen. Factors affecting availability of dissolved oxygen include atmospheric exchange, mixing of water masses, upwelling, respiration, photosynthesis, ice cover, and physical factors such as temperature and salinity. Dissolved oxygen terminology is summarized and tables are included for both fresh and saltwater O2 solubility at different temperatures.Incipient O2 response thresholds are used in a statistical analysis to develop oxygen criteria for safeguarding various groups of freshwater and marine fish. These include mixed freshwater fish populations including or excluding salmonids, freshwater salmonid populations, salmonid larvae or mature salmonid eggs, marine anadromous and nonanadromous species. Criteria are based on threshold oxygen levels which influence fish behavior, blood O2 saturation, metabolic rate, swimming ability, viability and normal development of eggs and larvae, growth, circulatory dynamics, ventilation, gaseous exchange, and sensitivity to toxic stresses. The criteria provide three levels of protection for each fish group and are expressed as percentage oxygen saturation for a range of seasonal temperature maxima.Oxygen tolerances and responses of aquatic invertebrates to low oxygen are reviewed for freshwater and marine species according to habitat. No invertebrate criteria are proposed owing to the capacity for many invertebrate species to adopt anaerobic metabolism during low O2 stress. It is suggested that the criteria proposed for fish species will provide a reasonable safeguard to most invertebrate species. It appears likely, however, that a change in oxygen regime to one of increased O2 scarcity will probably influence invertebrate community structure.It is suggested that criteria for protection of aquatic life be implemented by groups of experienced individuals. The group should consider the natural oxygen regime for a specific water body and its natural variability, the aquatic life therein and its value, importance, relative O2 sensitivity, and the possibility of interactions with toxicants and other factors that may compound the stress produced by low O2 on aquatic life. Each water body and its aquatic life should be considered as a unique situation and criteria application should not encompass diverse areas, habitats, or biological associations as if they were identical.

scholarly journals Temporal variability of near-bottom dissolved oxygen during upwelling off central Oregon

2013 ◽  
Vol 118 (10) ◽  
pp. 4839-4854 ◽  
Author(s):  
Katherine A. Adams ◽  
John A. Barth ◽  
Francis Chan
Keyword(s):  
Dissolved Oxygen ◽  
Temporal Variability

scholarly journals Temporal variability in the importance of hydrologic, biotic, and climatic descriptors of dissolved oxygen dynamics in a shallow tidal-marsh creek

2017 ◽  
Vol 53 (8) ◽  
pp. 7103-7120 ◽  
Author(s):  
Natalie G. Nelson ◽  
Rafael Muñoz-Carpena ◽  
Patrick J. Neale ◽  
Maria Tzortziou ◽  
J. Patrick Megonigal
Keyword(s):  
Dissolved Oxygen ◽  
Temporal Variability ◽  
Tidal Marsh ◽  
Marsh Creek ◽  
Oxygen Dynamics

scholarly journals The Rybinsk Reservoir Water Quality: the Dissolved Oxygen Regime.

2016 ◽  
pp. 23
Author(s):  
Keyword(s):  
Dissolved Oxygen ◽  
Oxygen Concentration ◽  
Water Body ◽  
Rybinsk Reservoir ◽  
Aquatic Organisms ◽  
Dissolve Oxygen Concentration ◽  
Reservoir Water ◽  
Aquatic Life ◽  
Oxygen Regime ◽  
The Rybinsk Reservoir

This study was undertaken to investigate the dissolved oxygen content and saturation percentage in surface and near-bottom water of the Rybinsk Reservoir in 2011-2015 with Winkler method. Seasonal and annual variations of the oxygen concentrations in the water body were identified. It was found that in summer time shallower water in the Main part was seldom subjected to oxygen stratification and if stratification occurred it ass less expressed than in deeper parts of the reservoir. Comparison of the new data on the dissolve oxygen concentration with the previously obtained data was made. Over the past years, there have not been any significant changes in the reservoir oxygen regime. The dissolved oxygen concentration in the reservoir seldom reached full saturation of the studied period. On average, aquatic organisms in the water body have enough dissolved oxygen. However, sometimes its concentration in nearbottom layers drops to critically low levels, threatening aquatic life.

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