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Ecological Succession

Ecological Succession. Ecological Succession. Series of changes that occur in a community over time. So why do communities change over time? Because of Disturbances in the community Disturbances can be: Fires, Volcanic Eruptions, Floods, Landslides, Mining , Deforestation etc….

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Ecological Succession

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  1. Ecological Succession

  2. Ecological Succession • Series of changes that occur in a community over time. So why do communities change over time? Because of Disturbances in the community Disturbances can be: Fires, Volcanic Eruptions, Floods, Landslides, Mining , Deforestation etc…

  3. Two Types of Ecological Succession • Primary • Succession that begins in an area with no remnants of a previous community (Barren land; no evidence of life) • Typically happens after volcanic eruptions or retreating glaciers • Secondary • Begins in communities where life was not completely destroyed • Typically happens after floods, forest fires, , mining etc.

  4. Primary Succession

  5. Secondary Succession

  6. Pioneer Species- • First species to colonize barren areas • Occurs only for primary succession • Example: Lichen

  7. Climax Community • Stable community with a diverse number of species (End result of ecological succession) • Healthy ecosystems can return to its original climax community

  8. FIRST Plants Animals None at first Very small herbivores Insects, birds, rodents Larger Herbivores and Small carnivores Rabbits, squirrels, foxes Largest Herbivores and Carnivores Elk, Deer, Wolves, Coyotes, Bears • Pioneer/Soil Building Plants • Lichen • Grasses/Weeds (fast growing) • Shrubs • Fast growing/ Sun Tolerant Trees • Aspens • Slow Growing/ Shade Tolerant Trees • Evergreens, Pines, Oak etc.. LAST

  9. Are all disturbances bad for an ecosystem? NO, sometimes ecosystem are unhealthy. Succession can help restore health and biodiversity to an area.

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