1. Ecology Chap 4 Topics- Habitat-niche Interactions Succession Biomes
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2. What is a niche?
…it is the role or job of an organism in it’s environment.
It includes what it eats, where it lives, etc…
Bull frogs eat insects, spiders worms, small fish. They require water and hibernate in mud. They lay eggs in water.
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3. Reginald the Red Wolf http://www.youtube.com/watch?v=2L6N2diE8jc
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4. What is a habitat? …is where the organism lives.
EX: a pond, a tree or a
hole in the ground!
The bullfrog habitat is the pond.
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5. Tuesday Define the term Symbiosis Review the test (olivia, bailey B)
Review packet 3.2
Define the term Symbiosis
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6. Community Interactions
Symbiosis
Organism A
Organism B
Commensalism + o
Mutualism
Parasitism -
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7. Mutualism (symbiosis in a strict sense): Advantages for both partners.
Commensalism: One partner living on the other with no obvious effect on the second.
Parasitism: One partner living on the other with detrimental effect on the second.
Mutualism (symbiosis in a strict sense): Advantages for both partners.
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8. Predation Versus Parasitism
Predators get their food from prey, but they do not take up residence on or in the prey.
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9. Parasites get their food from hosts, and they live on or in the host for a good part of their life cycle; they may or may not kill the host.
Common flea
Heart worm
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10. What type of symbiosis?
Commensalism
Parasitism
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11. What type of symbiosis
Mutualism
Mutualism
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12. What type of symbiosis? Mutualism Parasitism Rhyzobia on plant roots
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13. Dynamics of Predator-Prey Interactions
Many of the adaptations of predators and their victims arose through coevolution.
The dynamics depend on:
the carrying capacity of prey population in the absence of predation,
the reproductive rates of the prey and predator,
the behavioral capacity of the individual predators to respond to prey density.
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14. Carrying Capacity
number of individuals who can be supported in a given area within natural resource limits
Limiting factors -cause population growth to decrease
Food availability
Human disturbances
Predation
Disease
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15. Example of a Limiting Factor
In mountainous regions and high latitudes, timberline is the limit of tree growth. Trees cannot grow above the high timberline because water remains frozen at the low temperature for most of the year. In this case, timberline, or more specifically, temperature is the limiting factor for tree density and distribution.
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16. Thursday
Finish symbiosis 5.2 packet
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17. Exponential Growth – unlimited resources, continuous growth
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18. Logistical Growth- carrying capacity of cells is reached
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19. Intra vs inter specific competition
Intra specific: competition within the same species. Ex. Two hummingbirds fighting over the same flowers. Two bucks fighting over the same doe. Inter specific: competition between two different species. Ex. The hawk and the fox both competing for rabbits.
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20. Keystone species
After watching the video write a sentence in your notebook defining a keystone species. Use an example. ecosystems-got-keystone
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21. Succession Today you will define this term
Describe how it applies to different ecosystems
Evaluate the succession of a pond-
describe sequence, change in the populations
Complete practice questions on Castle learning
(due by Thursday)
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22. Monday
TEST is tomorrow and Wednesday Today we will examine Succession and Climate change Ecological Succession- Notes Global Warming - Brainpop movie Practice packet Castle learning
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23. Succession-
a series of changes in a community in which new populations of organisms gradually replace existing ones

24. the first organisms to colonize a new site
Pioneer organisms-
the first organisms to colonize a new site
Ex: lichens are the first to colonize lava rocks

25. Primary succession
Rock

26. a stable, mature community that undergoes little or no succession
Climax community-
a stable, mature community that undergoes little or no succession

27. Primary succession
Write the notes on the slide for them to copy
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28. Secondary Succession
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