The primary consumers in a pond ecosystem are
Phytoplankton
Zooplankton
Fishes
Bacteria
Name an omnivore which occurs in both grazing food chain and the decomposer food chain.
$PAR$ stands for
What is primary productivity? Give brief description of factors that affect primary productivity.
Which one of the following types of organisms occupy more than one trophic level in a pond ecosystem?
The trophic level of mushroom and Monotropa is