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Plankton Culture - Coggle Diagram
Plankton Culture
Biology
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Photosynthesis
algae photosynthesis, i.e. they convert carbon into organic matter.
Light is the source of energy, which drives this reaction with wavelength and photoperiod the main factors.
In the dark, algae shifts from photosynthesis to respiration, and the equation is reversed and glucose is needed for energy
Light
Energy source
Intensity; not to low, not to high (photo-inhibition)
Nutrients
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Minerals, trace elements and vitamins are important for synthesis of pigments, enzymes
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Lag/Induction Phase
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This phase, during which little increase in cell density occurs, is relatively long when an algal culture is transferred from a plate to liquid culture.
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Stationary phase
In the fourth stage the limiting factor and the growth rate
are balanced, which results in a relatively constant cell density.
Death or “crash” phase
During the final stage, water quality deteriorates and
nutrients are depleted to a level incapable of sustaining growth. Cell density decreases rapidly and the culture eventually collapses.
Why Did Culture Crash??
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The key to the success of algal production is maintaining
all cultures n the exponential phase of growth.
the nutritional value of the produced algae is inferior once
the culture is beyond phase 3 due to reduced digestibility,deficient composition, and possible production of toxic metabolites.
Culture Types
Indoor/Outdoor.
Indoor culture allows control over illumination,
temperature, nutrient level, contamination with predators
Open/Closed.
Open cultures such as uncovered ponds and tanks are more readily contaminated than closed culture vessels such as tubes, flasks, carboys, bags,
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