Limiting Factors in a Semi-Arid Desert are Rainfall(Abiotic) because deserts receive less rainfall than most places which is why they are dry all the time. Human Expansion(biotic) is another one because since we have so many people in the world, we expand into many animals habitats. When we move in we kick them out and they usually just die soon after.

Mountains are often a barrier in a desert. In China, many of the deserts are surrounded by mountains which stop most animals from immigrating to different places. The climate changes are also a big deal. The average climate in a desert is around 18º Celsius. If an animal who were used to the desert were to leave, they are likely to freeze to death before they get too far from the desert

Organisms that have a predator-prey relationship are- Mountain Lion/Pronghorn Antelope because the lion eats the antelope. Scavengers include Millipedes and beetles. An example of Symbiosis is an antelope and a sheep feeding by each other and keeping watch for predators.

Rainfall and Temperature Graph