Which is not a structural aspect of ecosystem?
Productivity
Species composition
Diversity
Life cycle
What is the ultimate source of energy for the ecosystems ?
The amount of living matter present in an ecosystem at a given time is called
Which one of the following types of organisms occupy more than one trophic level in a pond ecosystem?
Choose incorrect option w.r.t. amount of living material present in different trophic levels at a given time
$PAR$ stands for