Ecology Unit Chapters 55-59 Notes PART 10

Biology

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11 Ansh Guglani 5. Greenhouse Effect – increase temperature due to increased amounts of CO 2 (greenhouse CH 4 , etc. due to burning fossil fuels) (CFC’s = chlorofluorocarbon’s) B. FLOW OF ENERGY 1. Energy is never recycled, must have constant input to support life. a. Exits as: i. Chemical bond energy ii. Food/organic molecule (wood in fireplace) iii. Light energy b. According to the First Law of Thermodynamics: Energy is neither created nor destroyed: it only changes form (lose some energy to heat) c. According to the Second Law of Thermodynamics: During energy transformations, some energy is converted to heat, which cannot be converted to other usable forms of energy. 2. Trophic Levels (feeding levels) a. Food chains (linear) and food webs (branched and
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Unformatted text preview: interconnected) b. Autotrophs – “self-feeders” or Primary Producers; synthesize the organic compounds of their bodies from inorganic precursors Photoautotrophs – use light as energy source; plants algae and some bacteria Chemoautotrophs – use energy from inorganic oxidation reactions; some bacteria c. Primary Productivity i. Gross Primary Productivity (GPP) – rate at which energy is assimilated; total organic matter assimilated by producers, measure by total O 2 production per 1 day ii. Net Primary Producers (NPP) – rate at which energy is stored (biomass) that is available to heterotrophs. NPP = GPP – [energy used by producers for their on cellular respiration]...
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This document was uploaded on 07/27/2011.

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