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Communities and Biomes Community: In ecology, a community is an assemblage of two or more populations of different species occupying the same geographical area Or biotic communities that are identified through a combination of parameters including species composition, structure and habitat.

Communities and Biomes Community: In ecology, a community is an assemblage of two or more populations of different species occupying the same geographical

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Page 1: Communities and Biomes Community: In ecology, a community is an assemblage of two or more populations of different species occupying the same geographical

Communities and Biomes

Community: In ecology, a community is an assemblage of two or more populations of different species

occupying the same geographical areaOr

biotic communities that are identified through a combination of parameters including species

composition, structure and habitat.

Page 2: Communities and Biomes Community: In ecology, a community is an assemblage of two or more populations of different species occupying the same geographical

Ecosystems of North Carolina

• http://core.ecu.edu/BIOL/luczkovichj/NCecol/NCnathis.htm

• Biomes

• http://www.thewildclassroom.com/biomes/estuaries.html

Page 3: Communities and Biomes Community: In ecology, a community is an assemblage of two or more populations of different species occupying the same geographical

Limiting Factors and Tolerance

• Limiting factors (what are they?) may be the same for different species. If they have different tolerances, the effect of the limiting factor will be different for each species (In the desert, water is usually the limiting factor, but different organisms will have different tolerances and thus be affected differently)

Page 4: Communities and Biomes Community: In ecology, a community is an assemblage of two or more populations of different species occupying the same geographical

Succession

• Primary and Secondary (know the difference)

• Pioneer species: The first to colonize in primary succession.

• Succession ends in the climax community (see p 68).

Page 5: Communities and Biomes Community: In ecology, a community is an assemblage of two or more populations of different species occupying the same geographical

Biomes

• A large group of ecosystems sharing the same type of climax community

• In other words, similar conditions across the world lead to similar communities. There will be different species, but the niches in the different communities will be very similar (US Great Plains and African Plains, for instance.)

Page 6: Communities and Biomes Community: In ecology, a community is an assemblage of two or more populations of different species occupying the same geographical
Page 7: Communities and Biomes Community: In ecology, a community is an assemblage of two or more populations of different species occupying the same geographical

Aquatic Biomes

• Marine

• Photic-Zone with light

• Aphotic-Zone without light

• Tremendous amounts of biomass and production

• Also can be divided into depths or temperatures

Page 8: Communities and Biomes Community: In ecology, a community is an assemblage of two or more populations of different species occupying the same geographical
Page 9: Communities and Biomes Community: In ecology, a community is an assemblage of two or more populations of different species occupying the same geographical
Page 10: Communities and Biomes Community: In ecology, a community is an assemblage of two or more populations of different species occupying the same geographical

Estuaries

• Where salt and fresh water meet and mix• Wide range of salinity, which can change

rapidly.• Very productive biologically• Where many species of fish come to

spawn (breed)• http://www.estuaries.gov/• http://w3.lasallehs.org/courses/science/

biology/html/biomes__estuary.html

Page 11: Communities and Biomes Community: In ecology, a community is an assemblage of two or more populations of different species occupying the same geographical

Freshwater biomes

• Lakes and Ponds may have a thermocline

• Ponds have a “succession” also. Eventually they fill in.

Page 12: Communities and Biomes Community: In ecology, a community is an assemblage of two or more populations of different species occupying the same geographical

Terrestrial Biomes

• Depend on temperature, altitude, latitude, and rainfall

• Graph p. 75

• Tundra- Permafrost, all low plants, COLD

• Taiga- a little warmer. Has evergreen conifer trees, much more animal life

• Desert-Arid (no rain)

Page 13: Communities and Biomes Community: In ecology, a community is an assemblage of two or more populations of different species occupying the same geographical

• Deciduous Forests- Lose their leaves...which are recycled.

• Rain forests – Wet!!!!• Tropical rain forests…since they are in the

tropics, they get energy (from the sun) year round. They have never been covered by ice, giving a longer period of time to coexist and evolve.

• More species diversity than any other ecosystem or biome. P. 82 explains much of the diversity in terms of the physical structure.

Page 14: Communities and Biomes Community: In ecology, a community is an assemblage of two or more populations of different species occupying the same geographical
Page 15: Communities and Biomes Community: In ecology, a community is an assemblage of two or more populations of different species occupying the same geographical

Assessment

• Hint: make sure you can answer the questions in the chapter assessment on p.88 and 89