Identify different types of diversity denoted by 1, 2 and 3 in the given figure.

• Alpha diversity represents the number of species in a particular community, and it is used to compare the number of species within the community. 
• Beta diversity is used to compare the number of species between two communities. 
• Gamma diversity refers to the sum of alpha diversity and beta diversity. It is used to measure diversity as a whole within a large area. 
  

In the given figure, 1 represents Beta diversity as it is showing the comparison between two communities. Alpha diversity is denoted by 2 as it includes a single community. Gamma diversity is denoted by 3 as it contains the whole geographical region including alpha and beta diversity. Thus, the correct representation is '1-Beta diversity; 2-Alpha diversity; 3-Gamma diversity'.