California science standards biology
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California Science Standards Biology. ECOLOGY. 6. Stability in an ecosystem is a balance between competing effects . . ECOLOGY: Biodiversity. Biodiversity is the sum total of different kinds of organisms. is affected by alterations of habitats. . b. Changes in Ecosystem. result from

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California Science Standards Biology

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California science standards biology

California Science Standards Biology


Ecology

ECOLOGY

6. Stability in an ecosystem is a balance between competing effects.


Ecology biodiversity

ECOLOGY: Biodiversity

Biodiversity

  • is the sum total of different kinds of organisms.

  • is affected by alterations of habitats.


B changes in ecosystem

b. Changes in Ecosystem

result from

  • changes in climate

  • human activity

  • introduction of nonnative species

  • changes in population size.


C population size

c. population size

is determined by

  • Birth (natality) rate

  • Death (mortality) rate

  • Immigration

  • Emigration


Ecology d biogeochemical cycles carbon

ECOLOGYd. Biogeochemical Cycles: carbon

  • NOTICE: relationship between abiotic resources (like sunlight) and organic matter


D biogeochemical cycles water

d. Biogeochemical cycles: Water

  • NOTICE: relationship between abiotic resources (like sunlight) and the environment


Ecology d biogeochemical cycles nitrogen

ECOLOGYd. Biogeochemical cycles: Nitrogen

  • NOTICE: relationship between abiotic resources (like nitrogen) and organic matter (like bacteria)


E ecosystem stability depends on producers and decomposers

e. ecosystem stability depends on producers and decomposers.

Producers

  • AutotrophsUse energy directly from environment

  • Make own food

  • Bottom of the food chain

  • First trophic level

Decomposers

  • Heterotrophs

  • Break down organic matter to get energy

  • FBI(fungi, bacteria, insects)


Ecology producers make own food

ECOLOGY:Producers: make own food


Ecology decomposers

ECOLOGY: Decomposers


California science standards biology

ECOLOGY: Consumers: Heterotrophs

Can be carnivores(eat other organisms)

Can be herbivores(eat producers)


California science standards biology

CONSUMERS-


Ecology energy

ECOLOGYENERGY

f. energy is stored but much energy is dissipated into the environment as heat.


California science standards biology

ECOLOGY:Energy is passed through food

Food chains show one energy path


Ecology f food web

ECOLOGY: f. food web

  • describes predator-prey relationships within a community;

  • groups of interconnected food chains

  • Arrows indicate direction of energy (and nutrition) flow


Ecology f energy pyramid

ECOLOGY f. energy pyramid.

Energy levels are called TROPHIC levels

This energy pyramid has 3 trophic levels


Evolution

EVOLUTION

  • 8. Evolution is the result of genetic changes that occur in constantly changing environments. As a basis for understanding this concept:


Evolution1

EVOLUTION

  • a. Students know how natural selection determines the differential survival of groups of organisms.


Evolution2

EVOLUTION

  • b. Students know a great diversity of species increases the chance that at least some organisms survive major changes in the environment.


Evolution3

EVOLUTION

  • e. Students know how to analyze fossil evidence with regard to biological diversity, episodic speciation, and mass extinction.


Credits

Credits

  • Slides with burgandy background are taken from http://www.sci.csuhayward.edu/best/Summer01/CalEcology


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