Biodiversity refers to variety at the genetic, species, and ecosystem level. A more biodiverse ecosystem has a larger variety of species and genetic variations.
Information about life present on Earth -- all known species, including their taxonomy, geographic distribution, collections, genetics, evolutionary history, morphology, behavior, ecological relationships, etc.
The Tree of Life Web Project (ToL) is a collaborative effort of biologists and nature enthusiasts from around the world. On more than 10,000 World Wide Web pages, the project provides information about biodiversity, the characteristics of different groups of organisms, and their evolutionary history.