Refer to Infographic 8.Each year a "dead zone" appears in the Gulf of Mexico when oxygen levels in the water drop to levels insufficient to support the fish and shrimp that live there.The drop-in oxygen is due to the decomposition of photosynthetic phytoplankton that grow in huge numbers,die,and sink to the bottom; they are then decomposed by bacteria that use up oxygen in the process.Use the infographic to describe what the limiting factor to phytoplankton normally is and how that factor is removed each spring when rains wash runoff from Midwestern farm fields into rivers that empty into the Gulf.What could be done to help prevent this from occurring?
Definitions:
Opportunity Cost
The consequence of choosing a specific option is the preclusion of potential rewards from other possibilities.
Pint
A unit of volume or capacity used in liquid measure, equal to one-half of a quart or approximately 473 milliliters in the United States.
Marginal Cost
The incremental cost of manufacturing one more unit of a product or service.
Marginal Benefit
The enhanced satisfaction or advantage experienced from the consumption of one extra unit of a product or service.
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