1.
breaks down rocks and leaf matter that mix to make soil
2.
The first organism to start populating in an uninhabited area
3.
when 2 species fight for the same resource
5.
when organic and rock matter fill a body of water
6.
when 2 species help each other
7.
When the population of a keystone species dwindles and harshly effects the environment
8.
something that keeps a population below the carrying capacity
11.
an area that has both abiotic and biotic factors
12.
an ecosystem dominated by this is stable until the species is disturbed
