In an introduction to terrestrial biomes, which ecosystem is generally recognized as having the greatest biodiversity?

Recognize that tropical rainforests have warm temperatures and high levels of precipitation year-round, creating ideal conditions for a wide variety of plants and animals to thrive.

Compare the biodiversity levels of the biomes, noting that tundra and boreal forests have harsher climates with fewer species, and temperate grasslands have moderate biodiversity but less than tropical rainforests.