Diurnal Fluctuations of Physicochemical Conditions in a Shallow Tropical Pond

Dunn, I. G.

doi:10.4319/lo.1967.12.1.0151

Cited by 19 publications

(11 citation statements)

References 8 publications

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“…Destratification could result in sudden mass fish mortality (cf. Johnson, 1961 ;Dunn, 1967) and mass zooplankton kills (cf. Dunn,197o) because of the deoxygenated and toxic waters ; undesirable algal blooms because of the sudden replenishment of some nutrients viz .…”

Section: Discussionmentioning

confidence: 99%

Physico-chemistry, destratification and nutrient budget of a lowland eutrophicated Malaysian reservoir and its limnological implications

Arumugam

Furtado

1980

Hydrobiologia

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Subang Lake (3°1oN, tot°29'E) is a stratified lowland reservoir with a marked chemocline of some variables that probably contributes to a greater species diversity and vertical layering of plankton communities . Destratification occurs in the reservoir and is probably seasonal . Destratification results in toxic and deoxygenated waters as well as nutrient replenishment from the hypolimnion and could cause sudden mass fish and zooplankton mortality and consequent algal blooms . The nutrient budget study indicates that the reservoir is naturally oligotrophic with phosphate as a limiting factor and the high nutrient loading of the auxiliary water intake from a nearby river, Buloh River, is the cause of eutrophication in the reservoir.

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Section: Discussionmentioning

confidence: 99%

Physico-chemistry, destratification and nutrient budget of a lowland eutrophicated Malaysian reservoir and its limnological implications

Arumugam

Furtado

1980

Hydrobiologia

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“…The high temperatures in Sarvatheertham also leads to a disproportionately high respiration, similar to that noted by Ganf (1972) . Dunn (1967) has recorded a high photosynthesis of 1848 mg C0 2 /m3 ./hr from a Malayan pond . This is eclipsed by the 13332 mg CO2 removed/m3 ./hr in Tamaraikulam, 6730 mg/m 3 ./ hr in Sarvatheertham and 8050 mg .…”

Section: Productivity Considerationsmentioning

confidence: 99%

Limnological studies of and primary production in temple pond ecosystems

Sreenivasan¹

1976

Hydrobiologia

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“…Some aspects of water chemistry, such as oxygen concentrations and pH, are known to undergo diel changes associated with photosynthesis by freshwater phytoplankton (Dunn, 1967), but little is known about the effects of zooplankton on diel changes in water chemistry . Hydrobiologia 74 .…”

Section: Introductionmentioning

confidence: 99%

Diel changes in plankton and water chemistry in Wicken brickpit

et al. 1980

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In a flooded Fenland brickpit 3 metres deep a 24-hr study (supplemented by other observations in the field and in the laboratory) revealed marked changes with depth and time in oxygen concentration, pH, total carbon dioxide, ammonium, oxidised nitrogen, phosphate and silica; as well as changes in the rate of cell-division and the vertical distribution of phytoplankton (Dinobryon and Peridinium), and the feeding and vertical movement of zooplankton (copepods, Bosmina, Ceriodaphnia, Polyarthra and Keratella) . Directional trapping of zooplankton revealed relationships between population density and the intensity of locomotory activity (a relationship subsequently supported by laboratory experiments), and between the rate of change of light intensity and the direction of swimming . Significant temporal segregation of the occupancy of a given level by zooplankters implies interspecific competition . Transient peaks in the concentrations of some nutrients near the surface are tentatively attributed to nutrient release by zooplankters that have fed at depth . Small-scale temporal and spatial heterogeneity of the type described here may help to explain the `paradox of the plankton' .These marked diel changes in water chemistry suggest that conclusions based on the analysis of single water samples should be viewed with caution .

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Diurnal Fluctuations of Physicochemical Conditions in a Shallow Tropical Pond

Cited by 19 publications

References 8 publications

Physico-chemistry, destratification and nutrient budget of a lowland eutrophicated Malaysian reservoir and its limnological implications

Physico-chemistry, destratification and nutrient budget of a lowland eutrophicated Malaysian reservoir and its limnological implications

Limnological studies of and primary production in temple pond ecosystems

Diel changes in plankton and water chemistry in Wicken brickpit

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