Herbivores compete with other herbivores for the limited food and water available in a desert.
Cattails would only be found in areas in the desert with permanent water. They are not common in the desert because such areas of water are rare.
The baobab tree is often found in desert and dry areas. They can be found throughout the Sahara, as well as in India.
Without water irrigation, the desert areas would be too arid, and food plants would be unable to grow as a farm crop.
Food would be the main area of competition between desert rabbits and mice. Depending on their shared environment, living space (places providing shelter from predators and for sleeping and breeding) might be another area of competition. For example: if food is plentiful, but safe and available living areas are not, they will compete for the latter, while if food is scarce but living space is plentiful, they'll compete for food. If both necessities are scarce, of course, they'll compete for both. If any or all necessities remain scarce, eventually one species will dominate and the other will migrate from, or die out of, that area.
Kangaroos generally avoid true desert areas as there is little for them to eat. They much prefer grasslands and areas of scrub that surround deserts.
Dunes would be more prevalent in desert areas with an abundance of fine sand, few plants and a persistent wind.
Alaska has no major true desert areas but if it did, they would be much colder than Arizona.
The climate of the Atacama is cool and very dry in most areas. It would be classified as a cool, dry desert climate.
you would expect to find them in a environment that is hot like the desert because it can store large amounts of water
There are over 2 dozen major desert areas in the world. To view this list and the countries in which they occur, click on this link.
If a desert has not been receiving normal rainfall, it is included in drought areas. If rainfall is normal or above, it would not be included.
Here in the desert southwest of the United States we have large herds of pronghorn that have survived for centuries. We also have smaller herds of mule deer and bighorn sheep.