Match the following. 

	Column I		Column II
(a)	Competitive release	(i)	Barnacles
(b)	Competitive exclusion	(ii)	Abingdon tortoise
(c)	Resource partitioning	(iii)	Warbler birds
(d)	Biological control	(iv)	Cactus feeding moth

Connell’s elegant field experiments is an example for competitive release. He showed that on the rocky seacoasts of Scotland, the larger and competitively superior barnacle Balanus dominates the intertidal area and excludes the smaller barnacle Chathamalus from that zone.

Gause’s ‘Competitive Exclusion Principle’ states that two closely related species competing for the same resources cannot co-exist indefinitely and the competitively inferior one will be eliminated eventually. Abingdon tortoise is eliminated in Galapagos island due to greater browsing efficiency of the goats.

MacArthur showed that five closely related species of warblers living on the same tree were able to avoid competition and co-exist due to behavioral differences in their foraging activities. It is a phenomenon called resource partitioning.

In Australia, the invasive cactus was brought under control by a cactus-feeding predator (a moth). It an example for biological control.