Question

Pyramid of number in grass ecosystem is
A) Linear
B) Upright
C) Inverted
D) Negative

Answer 1

The correlation of biomass, productivity or energy at various trophic levels is shown by an ecological pyramid. Generally, the primary producers are seen at the bottom and the apex predators at the top.

Complete answer:

For various habitats, the pyramids are distinct. As follows, there are three types of Ecological Pyramids:
Pyramid of numbers:- This indicates at successive trophic levels the number of individual species. It can be inverted or upright.
Biomass Pyramid:- At successive trophic stages, this displays the biomass. It can be inverted or upright.
Energy pyramid:- At successive trophic stages, it displays the rate of energy flow and/or productivity. It still stands straight.
The numbers of producers, herbivores and carnivores at their successive trophic stages are shown by this Pyramid. This pyramid may be either upright, or partly upright or inverted.
Pyramid of Numbers of Grassland Ecosystem
It is a graphical representation of the number of individuals at different trophic levels per unit area. Large numbers of producers tend to shape the base, while the tip is occupied by smaller numbers of top predators or carnivores. The pyramid of numbers varies in form from ecosystem to ecosystem.
For instance, autotrophs or producers are present in large numbers per unit area in an aquatic ecosystem or grassland areas. A smaller number of herbivores assist the farmers, which in turn helps fewer carnivores.
The number of producers (mainly grasses) in the grassland ecosystem is often the largest, followed by declining numbers at the second trophic level (herbivores), the third trophic level (carnivores) and the lowest number of apex predators.A pyramid is numbers in grassland is upright.
In an upright pyramid of numbers,the number of individuals decreases from the lower level to the higher level in an upright pyramid of numbers. In the grassland ecosystem and the pond ecosystem, this sort of pyramid is normally found. Given its abundance, the grass in a grassland ecosystem occupies the lowest trophic stage.
The key producers are next: the herbivores (for instance, the grasshopper). The number of grasshoppers is significantly smaller than the amount of grass. Then, for instance, there are the biggest carnivores, the rat, whose number is much less than the grasshoppers. The secondary consumers, like the snakes who feed on the rats, are the next trophic stage. And, like the hawks that kill snakes, there are the top carnivores, whose number is smaller than the snakes.
Thus the correct Answer is option (B)Upright.

Note: Pyramid of numbers is the relationship between the numbers of producers, herbivores and carnivores at successive trophic levels. In grassland, the producers, which are mainly grasses are always maximum in number as compared to the primary consumers (herbivores) like rabbits, mice etc.