Question

The term ecosystem was coined by
A. E.P Odum
B. A.G. Tansley
C. E Haeckel
D. E. Warming

Answer 1

Hint:An ecosystem is a functional unit comprising all the organisms in a particular place interacting with the physical environment, and interconnected by flow of energy.

Complete answer:
Ecosystem is the functional unit of nature. Ecosystems consist of non-living i.e. abiotic and living i.e. biotic factors.
Option A: E.P Odum is well known for his contribution to the ecosystem. Odum through forward the importance of ecology. He adopted and developed further the term “ecosystem”. Therefore, this is the incorrect option.

Option B: Ecosystem was coined by A.G. Tansley in 1935. Therefore, this is the correct option.
Ecosystems are divisible into two categories terrestrial and aquatic ecosystems. Ecosystem normally includes primary producers, decomposers and detritivores, a pool of dead organic matter, herbivores, carnivores and parasites and environment. The key functional aspects of ecosystem are:
a) Productivity and energy flow
b) Nutrient cycling
c) Decomposition
d) Water dynamics

Option C: The word ecology was coined by E. Haeckel. Ecology is the study of interrelationship of organisms with their environment and with each other. Therefore, this is the incorrect option.

Option D: E. Warming wrote his first book on plant ecology. He was a famous botanist and known for his contribution in ecology. Therefore, this is the incorrect option.

Thus, the correct answer is option (B) A.G. Tansley.

Note:The relationship between biotic and abiotic communities and the nonliving environment is always mutual, as both affect each other. Although the term ecosystem was introduced by Tansley but the concept of ecology appeared much later.