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last
updated
10/9/09
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BIO109
Online
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PROJECT
PROPOSAL
Format | Sample
Table 1. Tree, shrub, and succulent density (per 2500 m2) on the north- versus south-facing slope of Tumamoc Hill in Tucson, AZ as observed February 21 and 28, 2009. Significance (p<0.05) determined by chi square analysis.
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North-facing Slope |
South-facing Slope |
Significant? |
Tree Density |
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| Shrub Density | |||
| Succulent Density | |||
| Total Plant Density |
Independent Variable: Direction slope faces (north vs. south).
Dependent Variables: Plant density.
Controlled Variables: time of year, steepness, and ... (I want you to come up with them).
Assumptions: South-facing slopes will receive more direct sunlight than north-facing slopes, thus will experience higher solar radiation, higher temperatures, higher rates of evaporation, and lower soil moisture.uman impact will be the same on both slopes.
Example 2: Do birds prefer one type of bird seed over another?
Independent Variable: type of bird seed.
Dependent Variable: number of bird visits to feeder per hour or weight/volume of bird seed eaten per hour.
Controlled Variables: date, weather, time, location, type of bird feeder, placement of bird feeder, and disturbances.
Assumptions: more bird visits means more preference. The difference in weight/volume of bird seed before and after measure was actually eaten by birds and more consumption equals more preference. Type of bird seed affects energy content, nutrient content, and difficulty to eat.