Species richness is the number of different species represented in an ecological community, landscape or region. Species richness is simply a count of species, and it does not take into account the abundances of the species or their relative abundance distributions. In contrast, morphological diversity takes into account both species richness and species evenness.
How would you describe the the distribution of biodiversity across the Tree of Life? What branch of biology studies factors which produce these patterns?
Organisms are divided into eukaryotes, bacteria, and archaea. Eukaryotes include multicellular lineages such as animals, plants, and fungi, but they also include single-celled lineages (protists).
Lampreys ~40 species. Chichlids>1600 species
Lampreys has a weaker species richness
>375,000 described species.
Beetles have more richness than vertebrates.
We compare them to sister clades who didn’t feed on angiosperms.
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