Question

Q 2.State with reason the consequence of decrease in number of carnivores in an
ecosystem.
B) In a food chain , state the trophic level at which the concentration of harmful
chemicals is maximum Why is it so ?​

Answer 1

Answer:

A. If the share of carnivores were to reduce in the ecosystem, then the herbivores would increase in number. This would lead to reduction in plant species as there would be more herbivores to eat them and thus it would create a huge mess of the ecosystem.If the no of carnivorous decreases in an ecosystem, then it will led to the increase in the no of herbivores. As a result,the no of plants will decrease and the amount of oxygen will also decrease in the atmosphere.

B. The pesticides and chemicals are absorbed by plant from the soil and enter the food chain. Being non-biodegradable they accumulate progressively at, each trophic level. As human occupy the top level of any food chain, the maximum concentration of chemicals is found in our bodies.

Hope it helps you !!

Answer 2

Answer:

²)Ans:- If there is a decrease in number of carnivores in an ecosystem then there will be no Predator or very less Predator control over the population of Herbivores as a result the population of Herbivores will increase. herbivores eat grass so and an increase in herbivores population will lead to excessive grazing of grass this density of producer like grass will be much reduced overgrazing May eliminate the grass and other green plants completely and will convert forest into desert area.

B)And:- In a food chain the highest trophic level will have the maximum concentration of harmful chemicals the harmful chemicals enter the food chain at the producer levels and in the process of transfer of food through to food chains harmful chemicals got concentrated at each trophic levels the increase in concentration of harmful chemicals substances in the body of living organism at each tropic level of the food chain is called biological magnification.