succession

succession - Primary succession: colonization of land...

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1 Time • new species arrive when conditions are conducive to colonization • old species disappear when outcompeted by new species Abundance disturbance early successional mid successional late successional “pioneer” “climax” Successional stages Primary succession: colonization of land exposed by glacial retreat Glacier Bare
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2 Primary succession: colonization of land exposed by glacial retreat Tundra Shrubs Primary succession: colonization of land exposed by glacial retreat Woodland Spruce Forest http://www.youtube.com/watch?v=Hec9yK-QQ4o Secondary succession in a temperate deciduous forest area Seasonal succession in of microalgae in the water of temperate lakes Driven by seasonal changes in light, temperature and nutrient availability
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3 Climatic succession Climatic succession Species Stage Seed Ht (m) Age at Max. age 1st repro. (yrs) Epilobium latifolium Pioneer small 0.3 1-2 20 Dryas drummondii Dryas small 0.1 6-8 50 Alnus sinuata Alder med 4.0 8.1 100 Picea sitchensis Spruce
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succession - Primary succession: colonization of land...

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