Contrasting Diel Patterns of Vertical Migration in the Dinoflagellate Ceratium hirundinella in Relation to Phosphorus Supply in a North Temperate Reservoir

1988 ◽  
Vol 45 (6) ◽  
pp. 1093-1098 ◽  
Author(s):  
W. D. Taylor ◽  
J. W. Barko ◽  
W. F. James
Keyword(s):  
Vertical Migration ◽  
Soluble Reactive Phosphorus ◽  
Nutrient Content ◽  
Phosphorus Limitation ◽  
Phosphorus Loading ◽  
Water Volume ◽  
Mixing Processes ◽  
Diel Patterns ◽  
Ceratium Hirundinella ◽  
Reactive Phosphorus

Very different diel patterns of vertical migration in Ceratium hirundinella were observed during two midsummer periods of study in a north temperate reservoir. During the first study (29–30 July), Ceratium migrated within a 2-m-deep oxygenated zone, moving upward near to the surface during the day and downward to the oxic–anoxic interface at night. During the second study (7–8 August), Ceratium did not migrate towards the surface during the day. High photosynthetic oxygen production and mixing processes increased oxygen distribution from 2 to 3 m providing Ceratium with access to a significantly greater water volume, with a greater nutrient content. Riverine phosphorus loading during the week prior to the first study was about 10 times greater than during the week prior to the second study. Limiting cell phosphorus concentrations and no measurable soluble reactive phosphorus in the upper (0–3 m) water column suggested a relationship between phosphorus limitation and the cessation of positive phototaxis. Diel patterns of vertical migration in this species may be influenced by episodic variations in phosphorus and/or other nutrient loadings via riverine inputs as interflows to this reservoir.

scholarly journals Vertical phosphorus migration in biosolids-amended soils : concentrations in soils and leachates.

2021 ◽  
Author(s):  
Yulia Markunas
Keyword(s):  
Vertical Migration ◽  
Organic Phosphorus ◽  
Soil Phosphorus ◽  
Soluble Reactive Phosphorus ◽  
Land Application ◽  
Soil Leachate ◽  
Different Depths ◽  
Receiving Waters ◽  
Reactive Phosphorus ◽  
Biosolids Application

The impacts of biosolids land application on soil phosphorus and subsequent transfer to aquatic ecosystems in the condition of the minimal slope were assessed. Soil, representing typical "Non response" Ontario soil, was amended with anaerobically digested biosolids at a rate of 8 tonnes/ha. Over five months, soil samples from two different depths were sequentially fractionated to determine various inorganic and organic phosphorus pools in order to evaluate phosphorus vertical migration within a soil profile. Soil leachate was analyzed for soluble reactive phosphorus and added to the aquariums mimicking receiving surface waters. Water from aquariums was tested for the presence of eutrophication. The results indicated that biosolids application did not significantly affect phosphorus concentrations in soil and did not cause phosphorus vertical migration. The concentrations of soluble reactive phosphorus also were not affected by biosolids. No signs of eutrophication were observed in receiving waters.

Phytoplankton Summer Standing Crop and Annual Productivity as Functions of Phosphorus Loading and Various Physical Factors

1977 ◽  
Vol 34 (12) ◽  
pp. 2255-2270 ◽  
Author(s):  
Ray T. Oglesby
Keyword(s):  
Standing Crop ◽  
Phosphorus Loading ◽  
Water Volume ◽  
Physical Factors ◽  
Mixing Processes ◽  
Overlying Water ◽  
Mean Values ◽  
Annual Productivity ◽  
Variable Function ◽  
Morphoedaphic Index

Relations of phytoplankton summer standing crop and annual productivity to morphometric properties and edaphic factors, especially phosphorus loading, have been examined for a large, diverse, globally distributed group of lakes. Standing crop was highly correlated with dissolved phosphorus loading when mixing of the water column was taken into account. A regression applicable to lakes of all depths is given as a log-log function with predictive confidence intervals for summer mean values. Boundary conditions for the exclusion of certain lakes have been roughly determined. For lakes of mean depth > 25 m areal loading accounted for 97% of the variance in summer phytoplankton standing crop. Phosphorus inputs to shallower systems were adjusted to give a simple approximation of the influence of mixing processes and the ratio of bottom area to overlying water volume. Annual primary productivity seems to be a more complex and variable function of phosphorus loading than is summer standing crop. The former correlated fairly well with the morphoedaphic index. Productivity and standing crop showed well-defined trends in relation to other variables, but point scatter was so great that more exact definition of these functions was not justified. Key words: phytoplankton, phosphorus, eutrophication, lakes, morphoedaphic index

scholarly journals Vertical phosphorus migration in a biosolids-amended sandy loam soil in laboratory settings: concentrations in soils and leachates

2021 ◽  
Author(s):  
Yulia Markunas ◽  
Vadim Bostan ◽  
Andrew Laursen ◽  
Michael Payne ◽  
Lynda McCarthy
Keyword(s):  
Vertical Migration ◽  
Sandy Loam ◽  
Organic Phosphorus ◽  
Soil Phosphorus ◽  
Soluble Reactive Phosphorus ◽  
Dry Weight ◽  
Land Application ◽  
Soil Leachate ◽  
Laboratory Setup ◽  
Reactive Phosphorus

The impacts of biosolids land application on soil phosphorus and subsequent vertical migration to tile drainage were assessed in a laboratory setup. Soil, representing typical “nonresponse” Ontario soil as specified by Ontario Ministry of Agriculture, Food, and Rural Affairs (OMAFRA), was amended with anaerobically digested biosolids at a rate of 8Mgha−1 (dry weight). Over five months, these amended soil samples from two different depths were sequentially fractionated to determine various inorganic and organic phosphorus pools in order to evaluate phosphorus vertical migration within a soil profile. Soil leachate was analyzed for soluble reactive phosphorus.The results indicated that biosolids application did not significantly affect phosphorus concentrations in soil and did not cause phosphorus vertical migration. The concentrations of soluble reactive phosphorus also were not significantly affected by biosolids.

scholarly journals Vertical Phosphorus Migration in a Biosolids-Amended Sandy Loam Soil in Laboratory Settings: Concentrations in Soils and Leachates

2016 ◽  
Vol 2016 ◽  
pp. 1-8
Author(s):  
Yulia Markunas ◽  
Vadim Bostan ◽  
Andrew Laursen ◽  
Michael Payne ◽  
Lynda McCarthy
Keyword(s):  
Vertical Migration ◽  
Sandy Loam ◽  
Organic Phosphorus ◽  
Soil Phosphorus ◽  
Soluble Reactive Phosphorus ◽  
Dry Weight ◽  
Land Application ◽  
Soil Leachate ◽  
Laboratory Setup ◽  
Reactive Phosphorus

The impacts of biosolids land application on soil phosphorus and subsequent vertical migration to tile drainage were assessed in a laboratory setup. Soil, representing typical “nonresponse” Ontario soil as specified by Ontario Ministry of Agriculture, Food, and Rural Affairs (OMAFRA), was amended with anaerobically digested biosolids at a rate of 8 Mg ha−1 (dry weight). Over five months, these amended soil samples from two different depths were sequentially fractionated to determine various inorganic and organic phosphorus pools in order to evaluate phosphorus vertical migration within a soil profile. Soil leachate was analyzed for soluble reactive phosphorus. The results indicated that biosolids application did not significantly affect phosphorus concentrations in soil and did not cause phosphorus vertical migration. The concentrations of soluble reactive phosphorus also were not significantly affected by biosolids.

Effects of Large-Scale Metalimnetic Migration Events on Phosphorus Dynamics In a North-Temperate Reservoir

1990 ◽  
Vol 47 (1) ◽  
pp. 156-162 ◽  
Author(s):  
William F. James ◽  
Robert H. Kennedy ◽  
Robert F. Gaugush
Keyword(s):  
Total Phosphorus ◽  
Large Scale ◽  
Soluble Reactive Phosphorus ◽  
Phosphorus Loading ◽  
Sediment Surface ◽  
Anoxic Water ◽  
Oxidized Iron ◽  
Phosphorus Sedimentation ◽  
Reactive Phosphorus ◽  
Large Wind

In Eau Galle Reservoir, Wisconsin, early in the stratified period of 1982, hypolimnetic anoxia developed, soluble reactive phosphorus concentrations increased above the profundal sediment surface, and internal total phosphorus loading was high. Shortly thereafter, the passage of a cold front with high wind power resulted in mixing and a pronounced descent of the metalimnion. During this event, previously anoxic water within the metalimnion and upper hypolimnion became reoxygenated, internal total phosphorus loading declined to a minimum, and a loss of total phosphorus mass occurred from the metalimnion and hypolimnion. Total phosphorus mass in the epilimnion remained constant during this period. A similar pattern occurred during a large, wind-driven migration of the metalimnion in early August. During such events, phosphorus sedimentation rates increased in the hypolimnion, reflecting the loss of total phosphorus mass from the water column. In contrast, other investigations of lakes have reported that phosphorus is entrained into the epilimnion during metalimnetic migrations, rather than lost through sedimentation. Phosphorus sedimentation during large metalimnetic migration events in Eau Galle Reservoir may occur because previously anoxic water containing iron becomes reoxygenated, causing the coprecipitation and sedimentation of oxidized iron and phosphorus.

scholarly journals Vertical phosphorus migration in biosolids-amended soils : concentrations in soils and leachates.

2021 ◽  
Author(s):  
Yulia Markunas
Keyword(s):  
Vertical Migration ◽  
Organic Phosphorus ◽  
Soil Phosphorus ◽  
Soluble Reactive Phosphorus ◽  
Land Application ◽  
Soil Leachate ◽  
Different Depths ◽  
Receiving Waters ◽  
Reactive Phosphorus ◽  
Biosolids Application

The impacts of biosolids land application on soil phosphorus and subsequent transfer to aquatic ecosystems in the condition of the minimal slope were assessed. Soil, representing typical "Non response" Ontario soil, was amended with anaerobically digested biosolids at a rate of 8 tonnes/ha. Over five months, soil samples from two different depths were sequentially fractionated to determine various inorganic and organic phosphorus pools in order to evaluate phosphorus vertical migration within a soil profile. Soil leachate was analyzed for soluble reactive phosphorus and added to the aquariums mimicking receiving surface waters. Water from aquariums was tested for the presence of eutrophication. The results indicated that biosolids application did not significantly affect phosphorus concentrations in soil and did not cause phosphorus vertical migration. The concentrations of soluble reactive phosphorus also were not affected by biosolids. No signs of eutrophication were observed in receiving waters.

scholarly journals Vertical phosphorus migration in a biosolids-amended sandy loam soil in laboratory settings: concentrations in soils and leachates

2021 ◽  
Author(s):  
Yulia Markunas ◽  
Vadim Bostan ◽  
Andrew Laursen ◽  
Michael Payne ◽  
Lynda McCarthy
Keyword(s):  
Vertical Migration ◽  
Sandy Loam ◽  
Organic Phosphorus ◽  
Soil Phosphorus ◽  
Soluble Reactive Phosphorus ◽  
Dry Weight ◽  
Land Application ◽  
Soil Leachate ◽  
Laboratory Setup ◽  
Reactive Phosphorus

The impacts of biosolids land application on soil phosphorus and subsequent vertical migration to tile drainage were assessed in a laboratory setup. Soil, representing typical “nonresponse” Ontario soil as specified by Ontario Ministry of Agriculture, Food, and Rural Affairs (OMAFRA), was amended with anaerobically digested biosolids at a rate of 8Mgha−1 (dry weight). Over five months, these amended soil samples from two different depths were sequentially fractionated to determine various inorganic and organic phosphorus pools in order to evaluate phosphorus vertical migration within a soil profile. Soil leachate was analyzed for soluble reactive phosphorus.The results indicated that biosolids application did not significantly affect phosphorus concentrations in soil and did not cause phosphorus vertical migration. The concentrations of soluble reactive phosphorus also were not significantly affected by biosolids.

Effect of Freeze-Up on Major Ion and Nutrient Content of a Prairie Winterkill Lake

1977 ◽  
Vol 34 (11) ◽  
pp. 2207-2210 ◽  
Author(s):  
J. Barica
Keyword(s):  
Dissolved Inorganic Carbon ◽  
Major Ions ◽  
Soluble Reactive Phosphorus ◽  
Nutrient Content ◽  
Oxygen Depletion ◽  
Ammonia Nitrogen ◽  
Specific Conductance ◽  
Lake Volume ◽  
Total Ammonia ◽  
Reactive Phosphorus

The reduction of lake volume due to ice formation in a shallow, moderately saline eutrophic prairie lake lacking a permanent surface inflow or outflow accounts for observed increases in specific conductance and concentration of predominant major ions (Mg, Ca, Na, and SO4). Dissolved inorganic carbon, total ammonia nitrogen, and soluble reactive phosphorus concentrations follow a different pattern; their increase under the ice cover is proportional to the decrease in dissolved oxygen and chlorophyll a content. Key words: winter fish kill, freeze-up, major ions, nutrients, prairie lakes, oxygen depletion, eutrophication

scholarly journals Effects of Lanthanum Modified Bentonite and Polyaluminium Chloride on the Environmental Variables in the Water and Sediment Phosphorus Form in Lake Yanglan, China

Water ◽  
2021 ◽  
Vol 13 (14) ◽  
pp. 1947
Author(s):  
Ling Su ◽  
Chen Zhong ◽  
Lei Gan ◽  
Xiaolin He ◽  
Jinlei Yu ◽  
...  
Keyword(s):  
Suspended Solids ◽  
Soluble Reactive Phosphorus ◽  
Particulate Phosphorus ◽  
Modified Bentonite ◽  
Combined Application ◽  
Water And Sediment ◽  
Phosphorus Form ◽  
Labile P ◽  
Reactive Phosphorus ◽  
Polyaluminium Chloride

The application of lanthanum modified bentonite (Phoslock®) and polyaluminium chloride (PAC) is popular in the restoration of European temperate lakes; however, the effects of the application on the concentrations of phosphorus (P) in both the water and the sediments have been poorly evaluated to date. We studied the effects of the application of Phoslock® + PAC on the concentrations of total phosphorus (TP), particulate phosphorus (PP), soluble reactive phosphorus (SRP), total suspended solids (TSS) and chlorophyll a (Chla) in the water, and different P forms in the sediments, in an isolated part of Lake Yanglan. The results showed that the concentrations of TP, PP, SRP, TSS and Chla decreased significantly after the addition of Phoslock® + PAC. Moreover, the concentrations of labile-P, reductant-soluble-P and organic-P in the sediments were also significantly decreased after the Phoslock® + PAC application. However, the concentrations of both the stable apatite-P and residual-P in the sediments after application of Phoslock® + PAC were much higher than the pre-addition values, while the concentrations of metal-oxide-P did not differ significantly between the pre- and post- application conditions. Our findings imply that the combined application of Phoslock® and PAC can be used in the restoration of subtropical shallow lakes, to reduce the concentrations of P in the water and suppress the release of P from the sediments.

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