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Understanding Ecology: Biology Class Topics

Dive into the world of ecology with Biology 5/3/07 class topics covering trophic levels, water, carbon, and nitrogen cycles. Review notes and complete assignments to grasp the interconnectedness of ecosystems.

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Understanding Ecology: Biology Class Topics

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  1. Hand in W.S. 16.2 (Quiz/DR) before the bell rings Complete Video – “Ecology of the Human” 1A, 3A, 4A, 4B Hand in Video W.S. “Ecology of Humans” Review trophic levels Notes – water, carbon, nitrogen cycles "The only limits to our realization of tomorrow will be our doubts of today." Franklin D. Roosevelt To learn about ecology. Title: Biology 5/3/07 Class Topics Objectives: Sunday, January 5, 20202:23 AM

  2. Class Assignments What By When • W.S. 16.2 (Quiz & ½ of DR) 5/3/07 • Video W.S. “Ecology of the Human” 5/3/07 • W.S. Ch 16 Science skills 5/7/07 • Chapter 16 test 5/9/07 • Due this class period • Due next class period • Due in the future

  3. Grade Sheet 2A – p. 157 (5 pts.)

  4. Three hundred trout are needed to support one man for a year. The trout, in turn, must consume 90,000 frogs, that must consume 27 million grasshoppers that live off of 1,000 tons of grass.-- G. Tyler Miller, Jr., American Chemist (1971)

  5. Cycles • Water • Carbon • Nitrogen

  6. Water cycle • Transpiration • Condensation • Run off • Respiration • Evaporation • Precipitation • Water vapor • Percolation • Water storage • Ground water • Sublimation

  7. From: http://www.ncar.ucar.edu/eo/basics/images/usgs_water_cycle.jpg from: http://www.marietta.edu/~biol/102/ ecosystem.html#FoodChainsandWebs4

  8. Carbon cycle • Photosynthesis • Death and decomposition • Combustion • Atmospheric CO2 • Cellular respiration • CO2 dissolved in water • Fossil Fuels • Sediments • Limestone

  9. From: http://oceanography.geol.ucsb.edu/~gs4/s2004/Lectures/Ocean%20Life/A3-Nutrient%20Cycling/Carbon%20Cycle.Ross-P164.jpg

  10. Nitrogen Cycle • Atmospheric nitrogen (N2) cannot be used by most organisms • Nitrogen fixation • lightning, biological, industrial • Only bacteria found in soil and nodules of plants can change to usable form by ‘fixation’ • Change to NH3 • Ammonification • passing ammonia from animals through decay or urine • Assimilation • use of ammonia and nitrates by plants and then to animals • Nitrification • used by plants changing nitrogen into nitrates or nitrites • Denitrification • bacteria (anaerobic) that use nitrogen as final electron acceptor of respiration and pass N2 back into the atmosphere

  11. From: http://www.marietta.edu/~biol/102/ecosystem.html#FoodChainsandWebs4

  12. Classification Activity • Kingdom • Phylum • Class • Order • Family • Genus • species

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