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| A comprehensive and integrated investigation of the physical, biological and societal conditions through which we, and the rest of the planetary ecosystem, sustains life. |
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People have altered the environment at local, regional and even GLOBAL scale.
-Emissions
-Land use |
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Science is investigation and discovery based on observation, reproducible experimentation, hypothesis testing, and theory development.
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| All hereditarily based variation at all levels of organizations |
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1. genes within a single species
2. species composing all/part of a community
3. communities that compose parts of ecosystems |
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when an error occurs in the reproduction of DNA as it gets passed to new cells.
possible causes: radiation or a virus |
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4 characteristics:
- genetic variability
-environmental variability
-differential reproduction that varies with the environment
-influence of the environment on survival and reproduction. |
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| changes in frequency of a gene in a population simply by chance |
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Small number of individuals are isolated from larger population
-less genetic variation than original population
-characteristics present are affected by chance
-individuals may NOT be better adapted |
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Species richness (diversity) depends on:
-island size
-distance from mainland
-climate
*Equilibrium SR controlled by rate of extinction vs. introduction |
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| are functional units based on the interactions of abiotic, biotic and human components |
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Human disturbance can disrupt ecosystem function.
Attempts are made to reduce negative impacts.
First must understand critical functions to maintain processes. |
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| "Meeting the needs of the present without compromising the ability of future generations to meet their own needs" |
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