What is primary productivity ? State the factors that effect primary productivity.

Justify the following statement in terms of ecosystem dynamics. 'Nature tends to increase the gross primary productivity, while man tends to increase the net primary productivity'.

Read the given statements and select the correct option. Statement 1: Net primary productivity is less than the gross primary productivity. Statement 2 : Net primary productivity is equal to the gross primary productivity minus the respiration losses.

Primary productivity depends upon

State the relation between gross and net primary productivity.

Define primary infertility.

The biomass available for consumption to heterotrophs and the rate formation of new organic matter by consumers are defined as (a) gross primary productivity and net primary productivity respectively (b) net primary productivity and gross primary productivity respectively (c) gross primary productivity and secondary productivity respectively (d) net primary productivity and secondary productivity respectively.

Differentiate between Gross primary productivity and Net primary productivity

Write a short note on gross primary productivity.