The 'r' values of two closely related species X and Y, competing for the same resources, are 0.015 and 0.12 respectively. According to Gause's law, what will happen when the resources in the habitat are limited?

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Both the species would co-exist by resource-partitioning.

Species X will be competitively excluded.

There would be an occurrence of competitive release.

Species Y will be competitively excluded.

answer is A.

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Detailed Solution

The 'r' values of two closely related species X and Y, competing for the same resources, are 0.015 and 0.12 respectively. According to Gause's law, species X will be competitively excluded.

The competitive exclusion principle, also known as Gause's law, suggests that two species competing for the same limited resource cannot coexist indefinitely at constant population values. When one species possesses even a slight advantage over the other, it will ultimately dominate in the long term. Note that the 'r' value of species X is lower than that of the species Y.

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