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Many-year data on the concentrations of O2 and mineral phosphorus in a fattening-spawning water body for the Pacific salmon (red salmon) are presented; the seasonal and year-to-year dynamics of these con-centrations are analyzed. It is found that the lake water mass features a high concentration of O2, the upper 20-m layer being most aerated. It is shown that the year-to-year variability of the concentration of O2 dissolved in the lake water depends on the amount of organic matter coming with groundwater and surface runoff. The oxygen and phosphorus regimes of the lake at low and abundant entries of puberal red salmon for spawning are considered. 相似文献
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Sapozhnikov V. V. Arzhanova N. V. Mikhailovskii Yu. A. Ukolova T. K. Sviridenko V. D. 《Water Resources》2002,29(4):429-436
Data of hydrochemical studies performed in September 2000 in Lake Kuril'skoe were used to establish the specific features of the spatial distribution of temperature, O2, Si, mineral and organic forms of N and P, and to assess the availability of nutrients to phytoplankton. The concentrations of Nmin and Si were found to be high throughout the water mass from the surface to the bed, whereas Pmin concentration was low because of Fe abundance in the water. The development of phytoplankton is shown to be limited by the Pmin deficiency, which is partially compensated by its regeneration and the capability of diatoms for heterotrophic nutrition. 相似文献
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Sapozhnikov V. V. Arzhanova N. V. Agatova A. I. Kirpichev K. B. Luk'yanova O. N. Lapin S. A. Milovskaya L. V. Ukolova T. K. Sviridenko V. D. Bazarkina L. A. 《Water Resources》2004,31(5):553-559
The nutrient basis of Lake Azabach'e is studied. The distribution of pH and the concentrations of O2, Pmin, Fe, N–NH+
4, N–NO–
3, Si, and organic forms of N and P are considered. The chemical basis of biological production of Lake Azabach'e is assessed. It is found that the amount of Si is excessive everywhere and that phytoplankton production is limited by phosphate and mineral nitrogen deficiency in virtually equal degrees. 相似文献
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