Biodiversity refers to the numbers and kinds of living things that exist in an grow othe area. About 1.5 million species have been identified. Scientists believe that there are Spa many millions more species that have yet to the be discovered. The largest group of known are des species is insects. Earth has three times wal more insects than plants cha Some areas are more diverse than others. An area is more diverse if it has a great variety of niches. Which has more Spe niche diversity, a desert or a rain forest? en You are correct if you said rain forest. pr wh Deserts are usually the same from area to area. A rain forest has layers upon layers of places to hide, hunt, eat, reproduce, and B build nests. Earth's most diverse ecosystems are along the equator. One of the reasons for this is that the climate is similar there all year long. Species have plenty of food, rainfall, and shelter. Plants are always growing and never shed their leaves. Organisms there don't have to survive harsh winter conditions.