Primary productivity is defined as:

Total energy fixed by an ecosystem is called

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".

Which of the following ecosystems has the highest productivity?

Which of the following ecosystems has the highest gross primary productivity?

State whether the following statements are True or False:
$I.$ The total organic matter synthesized by the producers in the process of photosynthesis per unit time and area is known as gross primary productivity.
$II.$ Net primary productivity is the weight of the organic matter stored by the producers in a unit area/volume per unit time.