Species, Communities & Ecosystems (4.1)
Species and Populations
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Autotrophs vs Heterotrophs
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Saprotroph vs a Detrivore
Saprotrophs and deterivores are essential for nutrient recycling within the earth. While the are heterotrophs, as they obain their energy from something other than themselves, they tend to be the "weird" or "ugly" organisms of the world. Saprotrophs Detritivores vs. Decomposers |
Ecosystem Sustainability
Ecosystems must maintain a stability that allows them to fluctuate and handle a variety of problems as they arise.
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Quadrant Sampling & Chi-Squared
Overview
Sampling methodology- types of ecological sampling sets For Chi Squared and Quadrant Sampling methodology Random Number Generator-To generate random sets of numbers |
Chi-squared is a way to determine if two (or more) events are independent or dependent of each other.
x2= chi-squared Oi= observed Ei= expected. Sigma= sum of Ecology example lab report using Chi-Squared Please see document below for more specifics on this. |
Mesocosm Experiment (Practical #4)
A mesocosm is a simplified version of an ecosystem designed to control variables in order to observe, quantify, or understand relationships within the greater ecosystem. It is one way to measure and observe ecosystem sustainability and stability as well as observe the effects on a natural ecosystem without disrupting the environment.
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Things to consider when making a mesocosm:
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Examples of outdoor mesocosm experiments seen in the videos.
- Mesocosm lab- questions that can be answered- (video)
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How to build an indoor mesocosm:
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