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DISTURBANCES in ECOSYSTEMS

DISTURBANCES in ECOSYSTEMS. DISTURBANCES in ECOSYSTEMS. Eventually, all ecosystems are going to experience some sort of disturbance A Disturbance is an event that damages an ecosystem. It may lead to the elimination of organisms or alter the availability of resources

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DISTURBANCES in ECOSYSTEMS

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  1. DISTURBANCES in ECOSYSTEMS

  2. DISTURBANCES in ECOSYSTEMS • Eventually, all ecosystems are going to experience some sort of disturbance • A Disturbance is an event that damages an ecosystem. It may lead to the elimination of organisms or alter the availability of resources • The effect that a disturbance has on an ecosystem depends on the type, frequency and seriousness and varies depending on the situation

  3. DISTURBANCES in ECOSYSTEMS • Disturbances can be of either natural or human origin • Natural Disturbances are those that are caused by the natural environment • Some examples of natural disturbances include: • - snow storms, drought, flooding, sandstorms and hurricanes, frost, heat waves etc.

  4. DISTURBANCES in ECOSYSTEMS • Human Disturbances are those that are caused by us, and have a damaging effect on an ecosystem • Some examples of human disturbances include: • - oil spills, littering, logging, mining etc.

  5. DISTURBANCES in ECOSYSTEMS • It can take a long period of time for an ecosystem to recover from a disturbance • During recovery, an ecosystem goes through changes • Ecological Succession is the series of changes that occur in an ecosystem after a disturbance and continue until everything returns to a balance

  6. DISTURBANCES in ECOSYSTEMS • An example of Ecological Succession is as follows: - due to a disturbance, the trees of an ecosystem disappear - due to the disappearing trees, the birds that used them as a home, have now left - because the birds have now emigrated, new species enter that might have been hunted by the birds

  7. DISTURBANCES in ECOSYSTEMS • Secondary Succession is a process when one plant species supplants (replaces) another following a major ecological disturbance

  8. HOmework • Start review package • Make sure you answer questions 1-15 at end of chapter 10 (p342,343,344)

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