L9+Life+supporting+systems-Species

L9+Life+supporting+systems-Species - BISC 003 Environmental...

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BISC 003 Environmental Science: Life Supporting Systems s Life supporting systems s Biological concepts: individual species, population, community, ecosystem… s Ecological concepts: carrying capacity, trophic levels, biomass pyramid, food web, food chain…. s Biogeochemical cycles s Carbon cycle s Nitrogen cycle s Phosphorus cycle s Water cycle s Sulfur cycle
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s Lecture Outline: s General Concepts s Basic Characteristics of Life BISC 003 Environmental Science: Life Supporting Systems s Evolution of life s Natural Selection and Adaptation s Speciation s Species Interactions
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Major parts of earth’s life- support system s Atmosphere: air s Biosphere: living and dead organisms s Hydrosphere: water s Lithosphere: crust, top of upper mantle (soil, minerals, other natural resources)
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Sunlight s Sun is a fiery ball of exploding hydrogen gas. s Radiant energy classified by wavelengths. s Lower energy has longer wavelengths , s Intense energy has short wavelengths.
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Sunlight s Solar energy that reaches the earth’s surface is in, or near, the visible light wavelengths. s Drive photosynthesis. s More than half of the incoming sunlight may be reflected or absorbed by atmospheric clouds, dust, or gases. s Short wavelengths are filtered out by gases in the upper atmosphere.
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Water quality s Weight of living organisms 60-70% water. s Universal solvent s Dissolved salt solutions conduct electricity. ohesive, producing capillary action. s Cohesive, producing capillary action. s Exist as liquid over a wide temperature range. s Expands when crystallizes. s High heat of vaporization. s High specific heat.
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Concepts and connections s Organisms/populations/communities s Organism: any form of life s Population: group of individual organisms of the same species living within a particular area s Community: populations of all species living and interacting in an area at a particular time
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This note was uploaded on 12/21/2009 for the course BISC BISC003 taught by Professor Qian/ren/ko during the Fall '09 term at HKUST.

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L9+Life+supporting+systems-Species - BISC 003 Environmental...

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