Vertical distribution of different species occupying different level is called..........
Stratification
Productivity
$GPP$
$NPP$
Which one of the following is not a functional unit of an ecosystem?
Abiotic components refers to
The two components of an ecosystem are
An inverted pyramid of $...A...$ may occasionally be observed in $...B...$ communities
Which one of the following is one of the characteristics of a ecosystem structure?