Primary and Secondary Succession Ecological Succession Ecosystems are constantly changing in response to natural and human disturbances. As an ecosystem changes, older inhabitants gradually die out and new organisms move in, causing further changes in the community. Primary Succession
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plant growth on new
1.) In which stage is grass mostly found?
2.) The grasshopper sparrow is so named because of what it eats. Why do you think it is mostly found in stage 1?
3.) What new species appears in Stage 3? What can you hypothesize about this species based on the four pictures?
4.) By Stage 4, what type of vegetation has taken over?
5.) How did the trees change the environment, making it less favorable for the grasses to grow?
6.) Which animal survived in all stages of this succession? Why?
In your groups research your assigned topic. What happened? In which biome did the even occur? How did it effect the environment? How has the environment changed as a result of the dynamic environmental change? Include information on succession. Provide a 3 minute presentation for the class. Every member must speak!