Variation
in climate across the Great Basin affects the resilience of sagebrush ecosystem
following a fire primarily due to precipitation variance and temperature
fluctuation. After a fire, sagebrush
requires time to re-establish itself through reseeding. Because invasive species (i.e. cheatgrass)
mature and spread faster, sagebrush is already at a disadvantage. Drought conditions favor cheatgrass, with its
shallow root system able to maximize moisture uptake, as do seasonal
temperature fluctuations.
Because
cheatgrass buildup increases the fuel load in a given ecosystem, especially a
sagebrush ecosystem which typically have a very light understory, these
conditions will increase the likelihood and severity of fires, and thus
contribute inversely to sage grouse recovery, as their habitat is solely within sagebrush ecosystems.
The more resilient the sagebrush, the better the recovery of the sage
grouse. With this in mind, I believe
that the Colorado Plateau would be most affected by cheatgrass, due to its
warmer temperatures and lower precipitation.
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