Final answer:
The number of species in a community is referred to as species richness, which is a measure of biodiversity indicating the variety of species in a specific area.
Step-by-step explanation:
The number of species in a community is referred to as species richness. This term describes the variety of different species living in a habitat or biome and is a measure of biodiversity. Species richness can be influenced by factors such as latitude, with the highest being near the equator and the lowest near the poles, as well as other elements like island size and distance from the mainland in island biogeography. It is important not to confuse species richness with keystone species or other terms, as it specifically refers to the count of different species in a particular area.