DEFINE THE FOLLOWING ON PAGE 11 OR 12 PHOTOSYNTHESIS MUTUALISM COMMENSALISM PARASITISM CARRYING CAPACITY LIMITING FACTORS BELL RINGER!

How about the homework?? Symbiosis  Parasitism, mutualism, commensalism Cooperative Competitive

THE END OF UNIT II ECOLOGY! Succession

Communities What is a community?? Communities differ because…  they have different combinations of biotic & abiotic factors  Climates differ…so organisms differ  Examples??  Organisms are limited by resources available (limiting factors)  Examples??  most organisms can live only within certain range of conditions (range of tolerances)Examples- lizard in cold environment!

Communities Communities change over time because…  Organisms can change environment so it’s unsuitable for its continued survival  Examples?  The final, stable community is the “climax community”

Communities Succession – change in communities over time

Communities Primary succession  Happens where life has never been before  Can you think of some examples? Secondary succession  Happens where life has been before  Can you think of some examples?

Ecosystems Biomes – areas with similar climate, and therefore similar organisms Can you name some biomes?

Environmental Changes Communities are affected by all sorts of changes to their environments What are some examples of…  Geological forces  Cosmic forces  Biological forces

Human Impact on the Environment Deforestation  Using trees at rate higher than can be replaced

Human Impact on the Environment Habitat destruction  Clear-cutting, development, acid rain

Human Impact on the Environment Invasive Species  Kill off native species and irreparably change habitat

Human Impact on the Environment Threats to biodiversity  Pollution & habitat loss destroy organisms  Living things are interdependent  Brings stability

Human Impact on the Environment Pollution  Burning fossil fuels; greenhouse effect  Eutrophication of lakes from pollutants  Acid rain

Human Impact on the Environment Ozone Depletion  CFC’s in atmosphere; more UV hitting Earth  Global warming  Long-term catastrophic effects

Group work page 18 This is for a check grade for the notebook grade! Read the directions!