solar energy Which two factors cause the variation seen in primary productivity among the three biomes in the diagram? NET PRIMARY PRODUCTIVITY Tropical rainforest Temperate forest taiga Average Net Primary Productivity (kcal/m²/yr) cloud cover and precipitation O longitude and sunlight O precipitation and temperature O temperature and longitude The graph indicates relative solar energy midday at two different locations on the planet throughout one year. Which statement accurately describes the differences in gross primary productivity between locations A and B? A. 10
Introduction :- Productivity is the rate of generation of biomass in an ecosystem .The rate at which an organism , population or community assimilates energy ( gross productivity) or makes energy which is potentially available for animals that feeds on it ( net productivity) .The difference between these two rates is due to the rate at which energy is lost through excretion and respiration.Productivity is of two types : ,1.primary productivity ( at producers level).
2.secondary productivity ( at consumer level ) .
Primary productivity further divided into two sub-types: a) Gross primary productivity = The rate at which plants assimilate light energy .
b) Net primary productivity = The rate at which energy is incorporated as plant tissue .
Productivity is measured in kilo-joules per square meter per year (kjm-2 y -1 ) .
Productivity = biomass/ area × time (in year).
In terrestrial plants ,much of the net productivity is not actually available to consumer , for e.g: tree roots are not eaten by herbivores.
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