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Transcript
MNB Page 41
The slow changes of organisms that occurs when the environment changes.
Plant species
The main plants that controls the site. (grow in the largest numbers)
0-20
Primary stage
Weeds, grasses, wildflowers, mosses, ferns
20-50
Secondary stage
Shrubs, fruit trees, pine trees
50+
Mature stage
Hardwood/deciduous forest (Maple, Oak, Sweetgum trees)
Wars, farming, construction, fire, mowing, using pesticides
Introduction of a non-native species, soil compaction
Natural disasters (hurricanes, tornadoes, fire, flood, drought
tsunami, and earthquakes) and insect infestations
The last community (group of plants) to develop in succession
Climate, soil conditions, precipitation levels/type, geography, amount of sunlight
Annual
Biennial
Perennial
One year
Two years
More than two years