what is pyramid of numbers in ecological pyramids
Answers
Answered by
0
Hi mate .
thankx for asking this question.
here is your answer.
Pyramid of numbers represents the total number of individuals of different species (population) at each trophic level.
Depending upon the size, the pyramid of numbers may not always be upright, and may even be completely inverted.
It is very difficult to count all the organisms, in a pyramid of numbers and so the pyramid of number does not completely define the trophic structure for an ecosystem.
Pyramid of numbers – upright
In this pyramid, the number of individuals is decreased from lower level to higher trophic level.
This type of pyramid can be seen in grassland ecosystem and pond ecosystem.
The grasses occupy the lowest trophic level (base) because of their abundance.
The next higher trophic level is primary consumer – herbivore (example – grasshopper).
The individual number of grasshopper is less than that of grass. The next energy level is primary carnivore (example – rat).
The number of rats are less than grasshopper, because, they feed on grasshopper. The next higher trophic level is secondary carnivore (example – snakes). They feed on rats.
The next higher trophic level is the top carnivore. (Ex: Hawk).
With each higher trophic level, the number of individual decreases.
Pyramid of numbers – inverted
In this pyramid, the number of individuals is increased from lower level to higher trophic level. E.g. Tree ecosystem.
thank you.
BE BRAINLY !!!!!!!!!!!
thankx for asking this question.
here is your answer.
Pyramid of numbers represents the total number of individuals of different species (population) at each trophic level.
Depending upon the size, the pyramid of numbers may not always be upright, and may even be completely inverted.
It is very difficult to count all the organisms, in a pyramid of numbers and so the pyramid of number does not completely define the trophic structure for an ecosystem.
Pyramid of numbers – upright
In this pyramid, the number of individuals is decreased from lower level to higher trophic level.
This type of pyramid can be seen in grassland ecosystem and pond ecosystem.
The grasses occupy the lowest trophic level (base) because of their abundance.
The next higher trophic level is primary consumer – herbivore (example – grasshopper).
The individual number of grasshopper is less than that of grass. The next energy level is primary carnivore (example – rat).
The number of rats are less than grasshopper, because, they feed on grasshopper. The next higher trophic level is secondary carnivore (example – snakes). They feed on rats.
The next higher trophic level is the top carnivore. (Ex: Hawk).
With each higher trophic level, the number of individual decreases.
Pyramid of numbers – inverted
In this pyramid, the number of individuals is increased from lower level to higher trophic level. E.g. Tree ecosystem.
thank you.
BE BRAINLY !!!!!!!!!!!
prafullsupe78:
please mark as brainlist
Answered by
4
It is the representation of amount of energy in different different trophic levels.
Special Points:-
1. Energy pyramids are always upright or erect because there will be gradual loss in energy at successive trophic levels.
2. According to the 10% law of Lindeman, the 90% part of obtained energy of each organism is utilized in their various metabolic activities and heat.
3. Only 10% energy is transferred to the next trophic level.
4. So 90% energy is lost at each trophic level, therefore top consumers like lion etc. are ecologically weakest but physically they are strong.
Similar questions