Why are oceans least productive ?
Sea/ocean is less producer because $(i)$ It receives solar radiation in insufficient amount because sunlight decreases as the depth of sea increases.
$(ii)$ Sea water lacks Nitrogen, Which is an important nutrient substance for plants.
$(iii)$ Excessive amount of salts is not favourable for all plants.
$(iv)$There is no base to support plants
The lentic ecosystem includes which of following water
The green plants in an ecosystem which can trap solar energy to convert it into chemical bond energy are called
In pond ecosystem, diatoms represent
Source of energy in an ecosystem is
Organisms at a higher trophic level have less energy available. Comment.