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Changes can be observed and monitored in ecosystems

Changes can be observed and monitored in ecosystems . What we will cover…. 3.1 – Investigating the Distribution of Living Things in an Environments 3.2 – Interactions and Changes Occur in Ecosystems 3.3 – Succession: How Ecosystems Changes over Time .

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Changes can be observed and monitored in ecosystems

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  1. Changes can be observed and monitored in ecosystems

  2. What we will cover…. • 3.1 – Investigating the Distribution of Living Things in an Environments • 3.2 – Interactions and Changes Occur in Ecosystems • 3.3 – Succession: How Ecosystems Changes over Time

  3. Section Three Learning Outcomes • Monitor a local environment, and assess the impacts of environmental factors on the growth, health and reproduction of organisms in that environment • investigate a variety of habitats, and describe and interpret distribution patterns of living things found in those habitats • investigate and interpret evidence of interaction and change • identify signs of ecological succession in local ecosystems

  4. 3.1 Investigating the Distribution of Living Things in an Environment • Introduction • Ecosystems are always changing • Can be due to natural changes: drought, floods can cause massive long term changes • Can also be due to human activity: building dams, clearing forests

  5. Food for Thought? • What kind of changes do you think drought, floods, dams and forest-clearing cause? • How do these changes affect living things? • How do you think these changes can be measured and monitored?

  6. Human Impact in the Schoolyard • Students Group Activity • Reflect: • Describe two different things humans could do to have an impact of living things in your schoolyard • What different biotic factors did you noticed on our schoolyard? • Think about the places that are most frequently used in the schoolyard. Does your data prove that human use affected the number and distribution of living things in your schoolyard? Why or Why not?

  7. 3.2 Interactions and Changes Occur in Ecosystems • In any ecosystem, living things need to interact with non-living things. If there is an imbalance then problems will arise • Everything changes, change will always happening, everywhere, all ecosystems. • Changes occur through: • Bioinvasion • Competition • Predation • Weather

  8. Bioinvasion • Many of the plants and animals that we have in Canada were brought over by European settlers, Naturalist also introduced new species from research and some are just happy accidents. This is call Bioinvasion because these new species were and are stronger than the native species and they have no natural species as of yet which allow time to multiply. This can make a dramatic impact because it can push or eliminate the native species already here. • Refer to pages 56 and 57

  9. Competition • Changes occur in an ecosystem due to interactions with other biotic and abiotic factors. One main one is competition. As most of you know who have competed in the past is when at least one and another are trying to achieve the same goal. In a ecosystem this is when biotic factors are wanting and needing the same resources for survival.

  10. Predation • On top of competition you also have Predation; this is when you have one animal that preys on other animals for survival. This will work itself out when the prey runs long then the predators start to die off which will allow the prey to multiply and so forth

  11. Weather • think of natural disasters, floods, temperature changes, one temperature for too long

  12. Check and Reflect • Read with a partner and complete the “Check and Reflect” on page 60 • Due at the end on class, One sheet pre-partner set with both names on it.

  13. 3.3 Succession: How Ecosystems Change over Time • Guided Questions • Watch Video: http://www.youtube.com/watch?v=Y8vOaQUSGZU • Go over guided questions

  14. 3.3 Continued • Pioneer Species: • These are known as the first species that arrive in a new place. • Regardless how harsh the survival conditions may be they will find a way to survive. • They pave the way for new species to join the community and survive

  15. 3.3 Continued • Succession: • This can take years, decades and even centuries • One pioneer species have established themselves new species will arrive and take over. (this process repeats itself over and over) • Primary Succession: • Occurs in areas where no life exists due to an absence of soil. (volcanic island – lava flows and rock is left behind) • Secondary Succession: • This occurs when there has been a natural occurrence or human activities. The difference between this and primary is with secondary the habit has already supported life • Ex.) Farmer’s Field, a Vacant lot, a Strip Mine

  16. Group Project • Cypress Hills Succession • Groups 3 – 4

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