Bioremediation of marine coastal ecosystems: Using artificial reefs

Kapkov, V. I.; Shoshina, E. V.; Belenikina, O. A.

doi:10.21443/1560-9278-2016-1/2-286-295

Cited by 5 publications

(2 citation statements)

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“…Cystoseira reserves in the Black Sea coastal zone (which are of commercial interest) reduce due to a water transparency decrease. As a result of water transparency decrease, the lower boundary of Cystoseira growth gradually goes up (in 60-70s of the XX century the lower boundary of Cystoseira distribution was indicated at 15-20 m depths, now it is no deeper than 10 m) and the width of the algae belt decreases [1,12].…”

Section: Methodsmentioning

confidence: 99%

“…where V lim is determined according to the formula (7). Calculating the stationary content of the element that limits the growth, we find the stationary content of nonlimiting element: As it can be seen from the obtained relations (12), (13), stationary values of nitrogen and phosphorus content in the tissues are due to the balance between the uptake of these elements from the sea water and their spending on the growth of new tissues (production processes). Depending on the ratio of empirical values of the maximum uptake rate, half-saturation constant and the maximum alga growth rate, under certain external conditions (PAR, concentration of nutrients in the sea water, temperature) certain concentrations of nitrogen and phosphorus in alga tissues are settled.…”

Section: Description Of the Modelmentioning

confidence: 99%

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Modeling of the Biochemical Processes in the Benthic Phytocenosis of the Coastal Zone

Vasechkina¹,

Filippova²

2019

PhO

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A simulation model of bottom phytocenosis based on object-oriented approach to marine ecosystems was proposed. Data and methods. The dynamic model of macroalgae growth is based on the system of ordinary differential equations describing the processes of photosynthesis and production of organic matter, nitrogen and phosphorus uptake, and extraction of organic matter and oxygen into the environment. Photosynthetically active radiation (PAR), water temperature, a content of nutrients in the water were chosen as the control variables. Results. The model allows an estimation of nitrogen and phosphorus content in algae tissues, rate of photosynthesis, actual parameters of uptake nutrients and extraction of organic matter depending on the control variables. Analytical solutions for the steady state of a system at constant control variables were obtained. Parameterization of photosynthetic and kinetic parameters of seaweed using their dependencies of the specific surface of thalli was proposed. The growth of red macroalga Gracilaria biomass over a year was simulated with a preset dynamics of control variables (for the Southern Coast of Crimea). Yearly oxygen production, nitrogen and phosphorus uptake and accumulated quantity of these elements in algae tissues were calculated; the volume of organic matter coming to the next trophic level (benthic organisms and finfish) was estimated. The results correspond to the published observational ecosystem data in the region under study. Discussion and conclusion. The developed model will be used as a separate unit simulating the dynamics of bottom phytocenosis in a three-dimensional object-oriented physical-chemical-biological model of the marine ecosystem.

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Section: Methodsmentioning

confidence: 99%

Section: Description Of the Modelmentioning

confidence: 99%