Their abundance also varied with the seasons.

Its abundance varies according to environmental conditions including temperature and the availability of food.

The total abundance of long-lived species varies less from year to year, and 4.

The abundance of various phytoplankton species varies in relation to their biological need for these nutrients.

Their abundance and state of preservation vary from one bed to another.

The abundance of gases varies considerably from volcano to volcano.

The population sizes and abundance vary, as they probably depend on annual rainfall amounts.

The abundance of certain minerals, such as iron oxide, varies dramatically over the Lunar surface.

The abundance of the chemical elements on Earth varies from air to crust to ocean, and in various types of life.

Since there are many nuclear species, a computerised reaction network is needed to keep track of how all the abundances vary together.