1.
The mass or number of living organisms in a unit area at a particular time
2.
A type of ecological pyramid that can be inverted in nature
3.
Organisms which do not have a place in ecological pyramids
4.
Precipitation of water soluble inorganic nutrients in the soil as unavailable salts
5.
Degradation of detritus into simpler inorganic substances
6.
Vertical distribution of different species occupying different levels
