The Live oak trees can be defined as the sources of nutrients for the animals and plants.
Explanation:
Live oak trees are capable of producing acorns that turkeys, ducks, deer and other animals can feed on.
The acorn and flowers of oak rot and decay are the sources of nutrients for the soil and provides nutrients to other plants sharing the same soil for water and nutrients.
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1-no predators,so uncontrolled population growth
2-is a predator that is stronger than the apex predator of the area,or is in a predator free environment so has little to no problem spreading
3-is a toxic animal that breeds quickly,so when eaten can kill what ate it,there for ruining the ecosystem as the predators die from the toxic prey they eat.which can lead to method 1 if not dealt with.