Mathematical Problems in Engineering / 2015 / Article / Tab 1

Research Article

Numerical Mesocosm Experimental Study on Harmful Algal Blooms of Two Algal Species in the East China Sea

Table 1

Comparison between indoor culture, field mesocosm, and numerical mesocosm.

ModeIndoor cultureField mesocosmNumerical mesocosm

LocationCulture dishes30°50.5′N, 122°6.7′E~120°00′E–124°00′E, ~27°00′N–30°45′N

SpeciesS. costatum and P. donghaiense S. costatum and P. donghaiense S. costatum and P. donghaiense

Physical environmentArtificial light source
Fixed thermohaline value
Still water
Natural light
Local water temperature and salinity
No current impact
Parameterized irradiance
Simulated thermohaline value
Simulated current

Nutrient conditionArtificially added culture mediumArtificially added nutrientsSimulated nutrient concentration nudged towards observations

Exchange with outsideNoneArtificial circulationNumerical boundary conditions

Results(a) Adaptive temperature range of exponential growth phase for these two species
(b) S. costatum is more competitive in a rich nutrient environment
(c) P. donghaiense can live in low nutrient environment
(a) Maximum growth rates of these two species
(b) S. costatum can proliferate rapidly under high nutrient conditions and has a shorter duration of bloom
(c) P. donghaiense can survive under nutrient-limited conditions and its blooms persist over a longer period
(a) Simulation of the algal blooms caused in turn by these two species further confirms the competition mechanism between them
(b) The current contribution to the northward migration of the bloom center
(c) The lack of nutrient supplement in the open sea limits HAB occurrences in the coastal waters

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