There are around 4000 described species of aphids, and they are the most abundant myrmecophilous organisms in the northern temperate zones.

Those abundant organisms, which had spread from the tropical rain forests to the northern tundras, were killed by the radioactivity and an inability to photosynthesise.

The shallow tideland at the river mouth has reasonable salt content, abundant organisms, and a healthy water quality.

It is among the most abundant organisms found in the Rhynie chert, a Devonian Lagerstätte in Scotland.

P. ubique and its relatives may be the most abundant organisms in the ocean, and quite possibly the most abundant bacteria in the entire world.

The Ediacaran period (635 to 542mya) which is characterized by the evolution of abundant soft-bodied multicellular organisms.

Examples of oligotrophic organisms are the cave-dwelling olm, the bacterium, Pelagibacter ubique, which is the most abundant organism in the oceans with an estimated 10 individuals in total, and the lichens with their extremely low metabolic rate.

Bacteria are among the oldest and most abundant organisms on earth.

These bacteria belong to the photosynthetic picoplankton and are probably the most abundant photosynthetic organism on Earth.

Because the collection of DNA from an environment is largely uncontrolled, the most abundant organisms in an environmental sample are most highly represented in the resulting sequence data.