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Humans building houses in the alpine or near it.

Hunters
poaching

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mule deer
fish
birds
plants
snow

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the abiotic factors of the sierra nevada mountains are, rocks,dirt,Air. the biotic factors are, Animals such as mule deer,mountain lions,beaver,golden trout,And california bighorn sheep.

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Alpine is sustainable because the climate is the same and only certain animals/predators can live there. such as mule deer and sheep bighorn sheep live there but they're only predator is the mountain lion. Also the golden trout can live there because the mountains get a lot of snow and keeps the mountain lakes full of water.

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Alpine: Alpine is high elevation place were trees can not grow.The only thing that can grow there is short shrubs.