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 Habitat: the area where an organism lives. Includes both the biotic & abiotic factors  Niche: the full range of physical & biological conditions in.

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Presentation on theme: " Habitat: the area where an organism lives. Includes both the biotic & abiotic factors  Niche: the full range of physical & biological conditions in."— Presentation transcript:

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2  Habitat: the area where an organism lives. Includes both the biotic & abiotic factors  Niche: the full range of physical & biological conditions in which an organism lives & the way in which the organism uses those conditions

3  Tolerance to survive in that area  Amount of Resources

4  Every species has its own range of tolerance, the ability to survive and reproduce under a range of environmental circumstances.  The organism must expend more energy to maintain homeostasis, and so has less energy left for growth and reproduction.

5  The term resource can refer to any necessity of life, such as water, nutrients, light, food, or space.  For plants, resources can include sunlight, water, and soil nutrients.  For animals, resources can include nesting space, shelter, types of food, and places to feed.

6  Place in the food web  Range of temp. organism needs to survive  Type of food organism eats  How it obtains food  Who uses the organism for food  Physical conditions required to survive  When & how organism reproduces

7  No two species can share a niche in the same habitat!!  example is the Warblers & bacteria…

8 Warbler Niches Each of these warbler species has a different niche in its spruce tree habitat. By feeding in different areas of the tree, the birds avoid competing with one another for food.

9  Two species of paramecia (P. aurelia and P. caudatum) were first grown in separate cultures (dashed lines). In separate cultures, but under the same conditions, both populations grew.  When both species were grown together in the same culture (solid line), one species outcompeted the other, and the less competitive species did not survive.

10  Community interactions, such as competition, predation, and various forms of symbiosis can powerfully affect an ecosystem.  Cobra Vs. Mongoose

11  Competition: occurs when organisms of the same or different species attempt to use a resource at the same place and time.  Direct competition between different species almost always produces a winner and a loser—and the losing species dies out. Trees in competition for light

12  Predation : one organism captures and feeds on another  Predators can affect the size of prey populations in a community and determine the places prey can live and feed.

13  Changes in the population of a single species, often called a keystone species, can cause dramatic changes in the structure of a community.  In the cold waters off the Pacific coast of North America, for example, sea otters devour large quantities of sea urchins (which eat kelp).

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15  Symbiosis: Any relationship in which two species live closely together  Mutualism: both species benefit Hummingbird and Flower Clownfish and sea anemone Rhino and Egret

16  Commensalism: one species benefits, other neither harmed nor helped Barnacles on a whale

17  Parasitism: one organism lives in or in another & harms it A flea or tick feeds on the blood of its host and may also carry disease-causing microorganisms

18  Tolerance  Resources

19  One will win and obtain the resource  The other may die off if it can’t find its resource

20  Commensalism  Mutualism  Parasitism


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