The term ’Ecosystem’ was coined by A.G. Tansley in 1935.
Tansley defined the ecosystem as a system formed by the interaction of a community of organisms with their physical environment. This concept laid the foundation for the study of ecology and the understanding of how organisms and their environments function as a whole.
Read the passage given below and answer the question.
Food chains ‘P’ and ‘Q’ form an interconnection. ‘P’ initiates with wheat grass whose population supports a few grasshoppers, frogs and snakes.
‘Q’ starts with dead decaying leaves of wheat grass which are eaten by earthworms and then food chain is continued with frog of food chain ‘P’.
Identify the types of food chains ‘P’ and ‘Q’: