An oasis
That would be an oasis.
Cacti are not thorny plants, they have spines. There are a number of desert plants with thorns, however, including acacia, mesquite, cat's claw, and others.
Basically, you will eat whatever you brought with you unless you have some way to capture some animals for food or are very familiar with the edible plants of the area.
wasteland
Desertification.
plants can live in all sorts of places. in water like cattails or whatever you call those things, then there's flowers and desert plants too. they can live about anywhere
watering
That would be an oasis.
An oasis.
no no
willies
Savanna is the transition zone between a forest and a desert.
I believe it's called "watering the plants".
An oasis is a small area of the desert with a permanent water source that supports more plant life than the surrounding desert.
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Aquarium
Irrigation