Which of the following statements is not correct? [2021]
Pyramid of numbers in a grassland ecosystem is upright.
Pyramid of biomass in sea is generally inverted.
Pyramid of biomass in sea is generally upright.
Pyramid of energy is always upright.
(3)
Pyramid of biomass in sea is generally inverted. In an aquatic system like sea, the producers are small organisms, their biomass is least and this value gradually shows an increase towards the apex of the pyramid, thus making the pyramid of biomass inverted in shape.
Match the trophic levels with their correct species examples in grassland ecosystem. [2020]
| Trophic Level | Species Example |
|---|---|
| (A) Fourth trophic level | (i) Crow |
| (B) Second trophic level | (ii) Vulture |
| (C) First trophic level | (iii) Rabbit |
| (D) Third trophic level | (iv) Grass |
Select the correct option:
A - (ii), B - (iii), C - (iv), D - (i)
A - (iii), B - (iv), C - (i), D - (ii)
A - (iv), B - (iii), C - (ii), D - (i)
A - (i), B - (ii), C - (iii), D - (iv)
Which of the following ecological pyramids is generally inverted? [2019]
Pyramid of biomass in a sea
Pyramid of numbers in grassland
Pyramid of energy
Pyramid of biomass in a forest
(1)
Pyramid of biomass in an aquatic ecosystem (e.g., pond, sea) is usually inverted because the biomass of fishes exceeds the biomass of phytoplanktons.
What type of ecological pyramid would be obtained with the following data? [2018]
Secondary consumer: 120g
Primary consumer: 60g
Primary producer: 10g
Inverted pyramid of biomass
Pyramid of energy
Upright pyramid of numbers
Upright pyramid of biomass
(1)
The given data depicts the inverted pyramid of biomass, usually found in aquatic ecosystem. This can be understood by taking an example of a pond in which phytoplankton (10g) represents the producer. Small fishes (60g) feeding upon these phytoplankton represent primary consumers which are further eaten by the big fishes (120g) representing secondary consumers.
Which ecosystem has the maximum biomass? [2017]
Grassland ecosystem
Pond ecosystem
Lake ecosystem
Forest ecosystem
