Pandapas Pond Population

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Pandapas Pond Population

• By APB_at_AHS

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Field Overview

• Field Group Llyn Sharp (Dept. of Geo. Sciences _at_
  VT), Mr. Jervis, Shane, Tyler, Laken, Laramie,
  Abbey, Sabrina, Chelsie, Reagan
• Friday April 18, 2008
• 1000 am
• Weather last 72 hours warm, sunny, no rain

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Testing

• N 37.280373 71 69 69 67
• W 80.47192 93 93 93 94
• N 37.28069 W 80.47193
• Stream Crossing- of Joe Pye trail
• Downstream- of Pandapas Pond
• ¼ mile
• Temp. 22C, 71F
• Water Temp. 12C
• Flow Rate- low
• pH6
• Dissolved oxygen- 7.2 ppm
• Turbidity- 106 cm

Reagan testing the temperature of the dirty
water.
Reagan testing the dissolved oxygen.
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Diversity Chart
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Macroinvertebrates
The group scrapping rocks and catching
macroinvertebrates in our net.
Scouring our net for macroinvertebrates. ?
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"More Scouring"
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• 1. Calculate a diversity index for this site
  using the same equation you used for the earlier
  observations.
• Site 1
• D N(N-1)
• ?n(n-1)
• D 28(28-1)
• ?25(25-1) 2(2-1) 1(1-1)
• D 756
• 602
• D 1.256

Site 1
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• 2. Locate and apply a Species Composition
  Similarity Index calculation to compare the two
  sites.

C the number of organisms in which both sites
share AThe number of species in site 1 Bnumber
of species in site 2
QS 2(C) /AB C3
2(3)/ 56 6/11 .545
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Pictures
Whitetail Deer at Pandapas Pond. ltwww.pandapaspond
.orggt
A Dragonfly found at Pandapas Pond.
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Basic Analysis

• In 1990, students compared a number of physical
  factors along gradients on the slopes of the
  north facing and south facing hillsides. Below
  are data for Relative Humidity for one
  observation set.
• Elevation from Path (meters)    RH ()         
  5                                        73
           10                                     
  79          15                                   
     66          20                                
        66          25                             
           64          30                          
              66          35                       
                 61

Picture by Reagan Gibbs
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• 1. Discuss what pattern, if any, is present in
  the observations. As elevation increases the
  relative humidity slightly decreases.
• 2. Provide possible explanations for the pattern.
  Air becomes thinner as elevation increases.
  Also shade cover becomes greater, which has to do
  with the temperature change.

3. Describe some biotic and abiotic factors which
might influence Relative Humidity on the slopes.
Biotic the canopy and relative vegetation,
decaying matter. Abiotic sunshine,
rainfall.
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Advanced Analysis

• 4. Select another abiotic factor (light,
  temperature, soil pH or moisture, etc.) which
  might vary in some way.
• Water pH
• 5. Hypothesize about a possible pattern based on
  your understanding of the ecosystems.
• Runoff from the shale bedrock creates a basic
  pH. Runoff from the road and the limestone gravel
  parking lot creates a acidic pH. Decaying oak
  matter can also result in a acidic pH.

Picture by Reagan Gibbs