biodiversity

• species richness - number of species in a habitat or community
• Some areas of the world are more biodiverse than others (e.g. the equator is more biodiverse than the poles).
• species abundance - the number of individuals in each species
• the benefit of of using the index of diversity is that it takes into account the population sizes of different species in one community
• the greater the value of index of diversity, the more diverse the community