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Biological Diversity: Key Questions What makes an ecological community ‘diverse’?

Biological Diversity: Key Questions What makes an ecological community ‘diverse’? What causes some communities to be more diverse than others? Why might biodiversity be important to preserve ? How do we measure and compare biodiversity?

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Biological Diversity: Key Questions What makes an ecological community ‘diverse’?

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  1. Biological Diversity: Key Questions • What makes an ecological community ‘diverse’? • What causes some communities to be more diverse than others? • Why might biodiversity be important to preserve? • How do we measure and compare biodiversity? • What impacts do invasive species have on biological diversity?

  2. What makes an ecological community ‘diverse’? • Which group of beads is more diverse? • Discuss in groups of 4.

  3. 2. What causes some communities to be more diverse than others? In groups of 4 you will analyze one of the following four graphs/charts which provide some answers to the above question. You will present, as a group, your interpretation of the graph at the end of class. Group 1: slide #5 Group 2: Slide #6 Group 3: Slide #7 Group 4: Slide #8/9

  4. http://163.16.28.248/bio/activelearner/52/ch52c2.html

  5. http://instruct.uwo.ca/biology/284/intro.html

  6. http://life.bio.sunysb.edu/marinebio/intermediate.jpg

  7. Number of seeds consumed per bird species Number of seeds consumed per bird species Number of seeds consumed per bird species Seed size Seed size Seed size 1 2 3

  8. 3. Why might biodiversity be important to preserve? • http://www.globalissues.org/article/170/why-is-biodiversity-important-who-cares • Using the website above, make a bulleted list of reasons why biological diversity might be important.

  9. What happens if we introduce a new specie with a broader niche? Am’t of resource consumed 1 Range of resource (seed size) Min  Max

  10. Am’t of resource consumed 1 Range of resource (seed size) Min  Max Species A, being a better competitor, has taken over this resource entirely, lowering overall species diversity No two species can occupy the same ecological niche in the same community. This is the competitive exclusion principle.

  11. KUDZU Pueraria lobata http://biology.usgs.gov/luhna/images/fig4_1.gif www.wikipedia.org

  12. Cichlids www.cichlid.com Each of Lake Victoria’s 200 cichlid species has evolved to exploit a different food source. This is known as niche partitioning. http://home.pacbell.net/shrksfan/4fish_A_01-24-03.jpg

  13. Pisaster ochraceous or sea stars are predators of bivalves. How could the presence of Pisaster promote bivalve diversity? • http://www.marine.gov/pisaster.htm

  14. Ants belong to the insect order Hymenoptera along with Bees and wasps

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