Discussion
Wetlands occurring between terrestrial (land) on one side and deep water on another side is an example of :
Answer: A
Such a wetland is an example of an ecotone.
An ecotone is a transition zone between two different ecosystems, here land and deep water. It holds species of both neighbouring communities and some of its own, so it is often richer in species than either, the 'edge effect'. Mangroves, estuaries and marshes are classic ecotones.
An ecological pyramid shows numbers, biomass or energy across trophic levels. An ecological race is a population of a species adapted to local conditions, and an ecological niche is the functional role and requirements of a species, not a zone between systems.
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