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Ecological Relationships

Ecological Relationships. Warmup. Describe some of the ecological relationships that you saw in the Mt. St. Helens slideshow. Relationships between living things. How might two individuals from different species interact? +,+ +,0 +,- Predation Competition What is a niche?.

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Ecological Relationships

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  1. Ecological Relationships

  2. Warmup • Describe some of the ecological relationships that you saw in the Mt. St. Helens slideshow.

  3. Relationships between living things • How might two individuals from different species interact? • +,+ • +,0 • +,- • Predation • Competition • What is a niche?

  4. Tiger Shark and loggerhead turtle interacting in the waters near the Bahamas. • Make a prediction about the relationship between these two animals • Video Clip 1 http://www.pbs.org/wnet/nature/lessons/symbiotic-strategies/video-segments-the-secret-world-of-sharks-and-rays/1496/

  5. Look at your worksheet. Make a prediction about the relationship between each of the remaining pairs of animals. • Video clips 2 and 3 http://www.pbs.org/wnet/nature/lessons/symbiotic-strategies/video-segments-the-secret-world-of-sharks-and-rays/1496/

  6. What type of symbiotic relationship was NOT seen in these video clips? • Parasitism = symbiotic relationship which provides a gain for one species and loss for the other • Different from predation • Prolonged • Does not result in death of the host (usually) • Can you name any parasitic relationships?

  7. Plasmodium • Protozoan that causes malaria • TWO host species • Mosquito is not the parasite-it is a vector • Life cycle of a Malaria Parasite http://malaria.wellcome.ac.uk/node40036.html

  8. These ecological relationships (predation, competition, mutualism, commensalism, parasitism), have evolved over long periods of time between species that coexist • Even those detrimental to some species are important in maintaining balance • Threats to stability of ecosystems can occur when dramatic events or shifts in behavior disrupt the balance

  9. Collapse of Sharks • An example of an ecological relationship that has been disrupted • How has the relationship between humans and sharks changed over time? Clip 4 http://www.pbs.org/wnet/nature/lessons/symbiotic-strategies/video-segments-the-secret-world-of-sharks-and-rays/1496/

  10. Sharks in our Future • How can balance be restored? • How is the following strategy helping to solve the problem? Clip 5 http://www.pbs.org/wnet/nature/lessons/symbiotic-strategies/video-segments-the-secret-world-of-sharks-and-rays/1496/

  11. Homework • Symbiotic Relationships Worksheet

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