Unit 2 Ecology Goal 5 T.L.W. develop an understanding of ecological relationships among organisms

Symbiotic Relationships

Can you identify?

Limiting Factors Can be Biotic or Abiotic! Do you know the difference?

How might the following limiting factors influence carrying capacity? What is carrying capacity? How might these affect Carrying capacity? Food Competition Harsh winter

Biogeochemical cycles The CARBON cycle C Photosynthesis and cellular respiration

Biogeochemical cycles Nitrogen cycle N 78% of the air is N2 , but only Bacteria can turn this form of nitrogen into useable forms by a process called N-fixation

Energy Transfer Food chains & Food Webs – do you know the difference?

Energy Transfer Can you identify the producers, herbivores, carnivores?

The 10% Rule Only 10 % of the available energy gets transferred to the next level………..90% gets lost as????

Biomass The amount of living matter At which level is biomass greatest?

Population growth What determines how large a population will become?

Human Population Growth Demography = the study of human population growth Why is this important?

Random Sampling Quadrant analysis is used to estimate population size when it is impossible to take an actual count.

Human Impacts reliance on fossil fuels causes? Excessive CO2 leading to Global warming YouTube - A Global Climate Change (animation) Acid Rain In combustion NOx and SOx react to form nitric acid and sulfuric acid causing……. http://www.youtube.com/watch?v=893KB3s_jIA&NR=1 Deforestation Clearing land and removing trees is bad because……….. it destroys habitats but reduces the amount of CO2 that can be removed from the atmosphere

Human Impacts Introduction of exotic (non-native) species is bad because…………….. They out-compete native species and alter ecosystems Snakehead fish http://www.youtube.com/watch?v=rEfviq9t6kY Kudzu plant Fire ants Bhurmese python http://www.youtube.com/watch?v=kcr9blivD3s

Human Impacts Pollution & use of pesticides http://www.youtube.com/watch?v=E5P-UoKLxlA