Question

The organisms spending most of the time in transitional area between two communities are called

• A. Exotic species
• B. Edge species
• C. Keystone species
• D. Critical link species

Answer 1

The correct option is B Edge species

Ecotone is the transition zone between two communities, e.g., forest and grassland. Ecotone has an admixture of species belonging to both the communities. Some specific species also occur exclusively in ecotone. As a result, ecotone possesses higher number of species than either of the two communities. The increased number and even density of species in a region of ecotone or community border is called Edge effect. The species which are found primarily, most abundantly or spend most of their time in ecotone or community boundary are known as Edge species.