Explain primary productivity and the factors that influence it.
Answers
a. Primary productivity : amount of biomass/organic matter produced per unit area over a time period by the plant during photosynthesis.
Factors : availability of nutrients / quality of light available / availability of water / temperature of the given place / type of plant species of the area/photosynthetic capacity of the plants.
b. Oxygen increases rate of decomposition.
Decomposition is an oxygen consuming process thus soluble substances such as sugars.
Chemical : decomposition is slow when chitin and lignin are present.
Answer:
Primary productivity is used to describe the rate at which plants and other photosynthetic organisms produce organic compounds or organic matter or biomass in an ecosystem.
It has two aspects :-
1. Gross productivity
2. Net productivity
NPP = GPP - R ( respiration loss )
Factors that influence it are =)
☆ Light.
☆ Temperature.
☆ Species decomposition.
☆ Availability of nutrients and photosynthetic capacity.
☆ Species succession.
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