The abiotic factors of the grassland include but are not limited to: climate, parent material and soil, and topography. This affects the ecosystem, because without them, the grass would not be able to grow, and hence would not be called a grassland.
The biotic factors of the grassland include but are not limited to: autotrophs and heterotrophs. This affects the ecosystem, because it has biotic factors that are often depending on the abiotic factors for survival.
Density Dependent
Overcrowding of coyotes will lead to the over hunting of smaller mammals and eventually the starvation of coyotes, leading to a decline of population.
Density independent
Natural disasters such as prairie fires will thin out populations.