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2.7 Measuring changes in the system

2.7 Measuring changes in the system. Describe and evaluate methods for measuring change along an environmental gradient. What is an ecological gradient? Paste in a picture to show an area where there would be an ecological gradient.

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2.7 Measuring changes in the system

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  1. 2.7 Measuring changes in the system

  2. Describe and evaluate methods for measuring change along an environmental gradient What is an ecological gradient? Paste in a picture to show an area where there would be an ecological gradient. T / F : Biotic and abiotic factors will change with distance along an ecological gradient. In ecology and geography what is a transect? Why is a transect good to use to show changes along an ecological gradient? Paste in a picture showing a transect in use.

  3. What is a line transect? What is a belt transect? What is a continuous transect? What is an interrupted transect? What limitations would you encounter if you carried out your transect readings at different times of the year? Or even of the day? How many times should you repeat transect readings to make sure they are reliable? How can you avoid bias in where you put your transect?

  4. Quadrats • What is random sampling with quadrats? • What is stratified random sampling? • What is systematic sampling? • What is percentage cover when measuring abundance?

  5. Describe and evaluate methods for measuring changes in abiotic and biotic components of an ecosystem due to a specific human activity. How would you assess the effects of intensive agriculture on an a stream? Look at biotic and abiotic components.

  6. EIAs What are they? What is a baseline study? What are the + and – of EIAs?

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