Which element in the southwestern desert ecosystem is abiotic?

Desert ecology is study of the abiotic factors of the deserts include the soil, rocks, minerals and sand.

Explanation:

Desert being arid and semi-arid regions on the surface of the earth, generally associated with extremely warm or cold temperatures are found in every continent.

Thus being divided into four types: hot, semiarid, coastal, and cold.

A hot desert ecosystem has a temperature ranging from 20 to 25 degrees C, while semi-arid are less extreme but range from 10 to 38 degrees. The coastal desert is cooler than hot and semi-arid deserts with average temperatures range from 13 to 24 degrees C. Cold deserts are notable dries and windiest climates with relative more annual rainfall. Landscape in the desert is composed of oasis, dunes, and mountains.

Idid the calculation and i get 875,000,000 which can be written as 8.75 x 10^6?