More Ecology and Cycles of Matter

Warm-up If the following organisms were arranged in a food pyramid, which organism would have the least amount of total energy available? (shrubs, lizards, insects, coyotes) A.CoyoteB. Insect C. LizardD. Shrub

Energy Flow Food Web –The depiction of a network of feeding relationships

Energy Flow Trophic Levels: Each step in a food chain –Producers make up the bottom level –Consumers make up the upper levels –Each level depends on the level below it

Draw Pyramid

Energy Flow Biomass Pyramid: amount of potential food available for each trophic level –Biomass: amount of living tissue Pyramid of Numbers: based on the numbers of individual organisms

Cycles of Matter The water cycle: –All living things require water to survive –Precipitation, transpiration, evaporation etc

Cycles of Matter The Carbon Cycle: –Carbon is the key ingredient of living tissue –Respiration, photosynthesis, feeding, erosion etc.

Cycles of Matter The Nitrogen Cycle –Necessary for amino acids –Nitrogen fixing bacteria on roots “fix” atmospheric nitrogen to be used by plants. –Consumers get nitrogen by eating producers