Biota

For a start, we have a very incomplete knowledge of the earth's biota.

Of course we are concerned about those animals that live in the river itself, such as hippos and crocodiles, and a whole host of small biota.

Although the broad macroevolutionary consequences of mass extinctions are well known (as in the dinosaurs-mammals changeover), their long-term effects on the temporal and spatial dynamics of clades and biotas are rarely investigated.