Which of the following is are the examples of Ecotone regions 1 n...........

Environment and Ecology Concept of Ecology

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Which of the following is/are the examples of Ecotone regions?

1. The border between a forest and desert.

2. Area between a soft-bottom and a hard- bottom marine substrate.

3. The bank of a stream running through a meadow.

4. The estuary lying between river and sea.

Select the correct answer using the code given below:

1, 2 and 3 only

2, 3 and 4 only

1 and 4 only

1, 2, 3 and 4

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Explanation:

Ecotone

Ecotone is a zone of junction between two or more diverse ecosystems.It has the conditions intermediate to the adjacent ecosystems. Hence it is a zone of tension. ! Some of the examples for the ecotone are,

! Statement 1 is correct: Grassland ecosystem forms the ecotone which is transitional zone between forest and desert ecosystem.

! Statement 2 is correct: Shallow waters at the bottom of continental shelf forms the transitional zone for the soft bottom and hard bottom marine communities.

! Statement 3 is correct: Meadows near the water stream forms abode for the both the terrestrial and aquatic communities of fauna. Therefore it forms the ecotone.

! Statement 4 is correct: Estuary is an area formed at the junction of marine water and fresh water mixes.