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Secondary Succession (0 (1 (5 (50 (70 (100 (120 (Soil layer thickens…
Secondary Succession
0
1
5
50
70
100
Soil layer thickens even more
120
Soil layer thickens enough to have large tress and shrubs to grow
150
A climax community develops after much evolution
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small trees and shrubs begin to grow around the mountain
The grasses and weeds die out and add to the soil layer
small grasses and weeds start to grow after the eruption
Mt St Helens erupts
An ecosystem around the Mountain
