Добірка наукової літератури з теми "Hypolimnetic anoxia"
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Статті в журналах з теми "Hypolimnetic anoxia"
Quinlan, Roberto, John P. Smol, and Roland I. Hall. "Quantitative inferences of past hypolimnetic anoxia in south-central Ontario lakes using fossil midges (Diptera: Chironomidae)." Canadian Journal of Fisheries and Aquatic Sciences 55, no. 3 (March 1, 1998): 587–96. http://dx.doi.org/10.1139/f97-279.
Повний текст джерелаLiu, Chang, Shiyan Wang, Xiaobo Liu, Huaidong Zhou, Budong Li, Yanliang Du, and Liang Wang. "Characteristics of water quality response to hypolimnetic anoxia in Daheiting Reservoir." Water Science and Technology 85, no. 7 (November 12, 2021): 2065–75. http://dx.doi.org/10.2166/wst.2021.491.
Повний текст джерелаNürnberg, Gertrud. "Coping with Water Quality Problems due to Hypolimnetic Anoxia in Central Ontario Lakes." Water Quality Research Journal 32, no. 2 (May 1, 1997): 391–405. http://dx.doi.org/10.2166/wqrj.1997.025.
Повний текст джерелаVerschoor, Mark J., Chistopher R. Powe, Eric McQuay, Sherry L. Schiff, Jason J. Venkiteswaran, Jiahua Li, and Lewis A. Molot. "Internal iron loading and warm temperatures are preconditions for cyanobacterial dominance in embayments along Georgian Bay, Great Lakes." Canadian Journal of Fisheries and Aquatic Sciences 74, no. 9 (September 2017): 1439–53. http://dx.doi.org/10.1139/cjfas-2016-0377.
Повний текст джерелаTu, Luyao, Paul Zander, Sönke Szidat, Ronald Lloren, and Martin Grosjean. "The influences of historic lake trophy and mixing regime changes on long-term phosphorus fraction retention in sediments of deep eutrophic lakes: a case study from Lake Burgäschi, Switzerland." Biogeosciences 17, no. 10 (May 20, 2020): 2715–29. http://dx.doi.org/10.5194/bg-17-2715-2020.
Повний текст джерелаLawrence, Gregory A., J. M. Burke, T. P. Murphy, and E. E. Prepas. "Exchange of water and oxygen between the two basins of Amisk Lake." Canadian Journal of Fisheries and Aquatic Sciences 54, no. 9 (September 1, 1997): 2121–32. http://dx.doi.org/10.1139/f97-235.
Повний текст джерелаLadwig, Robert, Paul C. Hanson, Hilary A. Dugan, Cayelan C. Carey, Yu Zhang, Lele Shu, Christopher J. Duffy, and Kelly M. Cobourn. "Lake thermal structure drives interannual variability in summer anoxia dynamics in a eutrophic lake over 37 years." Hydrology and Earth System Sciences 25, no. 2 (February 25, 2021): 1009–32. http://dx.doi.org/10.5194/hess-25-1009-2021.
Повний текст джерелаPrepas, Ellie E., Tom P. Murphy, W. Paul Dinsmore, Janice M. Burke, Patricia A. Chambers, and Sharon Reedyk. "Lake Management Based on Lime Application and Hypolimnetic Oxygenation: the Experience in Eutrophic Hardwater Lakes in Alberta." Water Quality Research Journal 32, no. 2 (May 1, 1997): 273–94. http://dx.doi.org/10.2166/wqrj.1997.020.
Повний текст джерелаBédard, Charles, and Roger Knowles. "Hypolimnetic O2 Consumption, Denitrification, and Methanogenesis in a Thermally Stratified Lake." Canadian Journal of Fisheries and Aquatic Sciences 48, no. 6 (June 1, 1991): 1048–54. http://dx.doi.org/10.1139/f91-123.
Повний текст джерелаRegnell, Olof, Tommy Hammar, Anders Helgée, and Bo Troedsson. "Effects of anoxia and sulfide on concentrations of total and methyl mercury in sediment and water in two Hg-polluted lakes." Canadian Journal of Fisheries and Aquatic Sciences 58, no. 3 (March 1, 2001): 506–17. http://dx.doi.org/10.1139/f01-001.
Повний текст джерелаДисертації з теми "Hypolimnetic anoxia"
(9725532), Acquire Admin. "Phytoplankton ecology in the Fitzroy River at Rockhampton, Central Queensland, Australia." Thesis, 1999. https://figshare.com/articles/thesis/Phytoplankton_ecology_in_the_Fitzroy_River_at_Rockhampton_Central_Queensland_Australia/21397656.
Повний текст джерелаThe seasonal periodicity of hydrology, physical and chemical water quality parameters and phytoplanktonic assemblages was studied at two sites in a large tropical Australian riverine impoundment. This study, the first in the lower Fitzroy River at Rockhampton, occurred between August 1990 and November 1993. It covered extremes in riverine flow conditions including major flooding and drought.
The annual flow regime was characterized by major flows in the "wet" season (summer and autumn) and greatly reduced or no flow in the "dry" season of winter, spring and sometimes early summer. Consequently, the thermal regime at both of the study sites was divided into two phases. The first was a phase of water column heating in the late winter to early summer. Features of this heating phase were long term stratification with progressive epilimnetic deepening, high pH, regular occurrence of epilimnetic oxygen supersaturation and decreased or undetectable levels of oxidized nitrogen in the surface layer. Hypolimnetic anoxia was recorded late in this phase. The second, between substantial wet season inflows and late winter was characterized by nutrient rich inflows and water column cooling and mixing.
Distinct interannual differences occurred in the volume, source and timing of inflows and subsequent water chemistry. In 1991, conductivity, water clarity, filterable reactive phosphorus (FRP) and pH increased markedly following major flooding from northern tributaries, while oxidized nitrogen decreased. This was in marked contrast to the drier years of 1992 and 1993 where turbidity and oxidized nitrogen were higher during the initial post-flood period and conductivity and FRP were lower. Extremes of mostly abiogenic turbidity (range 1.6 to 159 NTU) were a feature of the light climate. Ratios of euphotic depth/mixing depth below 0.3 occurred in early 1992 and 1993.
Steep gradients in the physical and chemical environment were paralleled by variations in the phytoplankton. Algal biomass (as chlorophyll a) at Site 1, midstream opposite the water intake for the city of Rockhampton, ranged from 1.5 to 56.6 ug L-1. The vertical water column distribution of chlorophyll was variable with assemblages normally dominated by phytoflagellates and various species of cyanoprokaryotes. There was also higher relative abundance of chlorophyll a (reflecting increasing dominance of cyanoprokaryotes) in the latter half of the year and at the lower end of light availability. The specific vertical water column positioning with respect to light and temperature is shown for assemblages dominated by the genera Anabaena, Aphanizomenon and Cylindrospermopsis.
The most striking aspect of the phytoplankton was the long term dominance of cyanoprokaryotes and the species richness (particularly that of cyanoprokaryotes) when compared with the dearth of information to date on other tropical rivers. Seasonal successions were varied. Regularly occurring assemblages were cyanoprokaryotes (Oscillatoriales), euglenophytes or non-flagellated chlorophytes during flows followed by flagellated chlorophytes and then cyanoprokaryotes (Nostocales) during the dry season. Genera present indicated highly eutrophic conditions. Hierarchical agglomerative clustering of phytoplankton data and comparison with a principal components analysis of corresponding environmental data were used to demonstrate the linkage between steep environmental gradients and variation in the phytoplankton assemblage. The specific environmental conditions associated with the success of various species were also analysed and presented. Using the above information, a two-part model was proposed which predicts the most likely genera of phytoplankton with respect to multidimensional environmental gradients. This model covers a wide gamut of conditions varying from highly variable lotic to lentic environments.
As Cylindrospermopsis raciborskii was considered a most important species in relation to the quality of the water supply for Rockhampton, the physical, chemical and biotic conditions prior to and during a bloom of this species are described. A number of possible grazers of C. raciborskii were identified with a view to future biomanipulation. One of these, the large ciliate, Paramecium cf. caudatum was found to be an effective grazer of toxic straight C. raciborskii in the laboratory.
This study is unique in that it analyses the impact of episodic events (eg. major flooding) on the subsequent phytoplankton in the lower Fitzroy River. The model relating phytoplankton to multidimensional environmental gradients provides great information for use in management, particularly in relation to the prediction of toxic algal blooms.
Книги з теми "Hypolimnetic anoxia"
Downen, Mark R. 1998 Lake Cassidy survey: The warmwater fish community competing under conditions of hypolimnetic anoxia and dense aquatic macrophytes. Olympia, WA: Washington Dept. of Fish and Wildlife, Fish Program, Fish Management Division, Warmwater Enhancement Program, 1999.
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