Dissolved Oxygen, Turbidity, and Gross Productivity

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Dissolved Oxygen, Turbidity, and Gross
Productivity

• Presented By
• Jonathan Williams
• Kerian Cox
• Ben Beha
• DeAntae Cooper
• Kenderick Craig
• Tnachus Kelly
• Byron Williams

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Research Problem

• How does the level of dissolved oxygen,
  turbidity, and pH affect the gross productivity
  of Lake Munson?

• With all the sewage once in the lake, we
• questioned its efficiency in sustaining life.
• The purpose of our experiment was to
• determine the gross productivity of the
• lake after its restoration.

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Scientific Approach

• Investigate factors and properties of the water
  that would determine and indicate the Gross
  Productivity of the lake.
• In this investigation, the specific variables
  were
• Dissolved Oxygen levels
• Turbidity and Transparency
• pH levels

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Hypothesis

• We believe that the level of dissolved oxygen
  will be low due to high levels of turbidity in
  the lake. This would lead to lower levels of
  gross productivity because the small amount of
  light penetrating the water surface of the lake
  would hinder the photosynthesis process, which
  produces oxygen. The oxygen in the lake directly
  affects the ability of the living organisms in
  the lake to survive and thrive.
• Consequently, we believe that if the water at
  Lake Munson were to have a low turbidity level
  then the dissolved oxygen level will be high
  causing more photosynthesis to occur in the lake.
  As a result the overall gross productivity of the
  lake would increase. The pH level shows the
  degree of acidity of the water which affects the
  ability of organisms to survive, and thus the
  gross productivity.

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Dissolved Oxygen

• Definition
• Dissolved Oxygen The amount of oxygen
  disassociated, or dissolved, in a given body of
  water at any time.
• The level of dissolved oxygen within a body of
  water will affect how much life is present within
  that ecosystem.
• It influences distribution of organisms low
  levels may indicate an excess of decaying organic
  matter.
• Closely related to light as photosynthesisproduce
  s oxygen.
• We performed Dissolved Oxygen Test in
• three different areas of the lake.

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What Happened

• Numerous Dissolved Oxygen tests taken around the
  area.
• Two different tests/methods the manual and the
  DO meter.
• This gave us some certainty in our level of
  accuracy in our values.
• The dissolved oxygen meter was a way to really
  see how accurate the manual test are compared to
  the digital devices.

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Presentation of Data

• The Correlation of Turbidity, Dissolved Oxygen,
• and pH of the three sites

JTU Jackson Turbidity Unit Ppm Parts per million
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Turbidity/ Transparency

• Definition
• Turbidity Cloudiness Inability to transmit
  light. It is also the amount of organisms that
  are in the water that prevent light from being
  able to go through to the bottom.
• Influences the depth of light penetration and
  subsequently photosynthesis.
• Transparency The degree to which water allows
  light to penetrate.

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What Happened

• We used a turbidity meter and the secci disc.
• The secci disc was again our manual test with the
  turbidity meter as our accuracy.
• The turbidity meter allowed us to see how
  accurate the manual test are compared to the
  digital devices.

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Presentation of Data

• The Correlation of Turbidity, Dissolved Oxygen,
• and pH of the three sites

JTU Jackson Turbidity Unit Ppm Parts per million
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pH and Gross Productivity

• Definition
• pH (power of Hydrogen) Determines if a solution
  is acidic or basic. The degree of acidity
  inversely impacts the ability of organisms to
  survive.
• Gross Productivity The energy captured by a
  trophic level.
• Can be measured by Light Dark Bottle Method
• Productivity is a measure of the rate at which
  energy is accumulated.
• We performed a Dark Light Bottle test as wellas
  a pH test on this area of the project.

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What Happened

• Dark Light Bottle
• This test assumes that the conditions (like the
  rates of respiration) in the dark bottle are the
  same as in the light bottle. Not a proven
  certainty
• Only measures a portion of the respiration and
  productivity of the total community attached
  algae and macrophytes, benthos, and nekton are
  ignored.
• Also the test requires at least 2 hours of time,
  so it took planning to retrieve each of the sets
  in the same amount of time-to control the
  experiment.
• The turbidity meter was used again for the pH
  test because of its multi function capability. It
  allowed us to maximize time.

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Presentation of Data

• The correlation of Respiration and Gross
  Productivity
• for the three sites

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Conclusion

• The water of Lake Munson was not low in Gross
  productivity as originally stated in the
  hypothesis. We thought that the water would be
  more turbid and have low levels of dissolved
  oxygen. The water was, in reality, not very
  turbid . Also, we thought the pH would be more
  acidic. The water was still notably acidic.  

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Pictures and Fun
DEP and Adult Resources
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Pictures and Fun
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Pictures and Fun
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Pictures and Fun
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Pictures and Fun
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THANK YOU For Coming to the Group 4
Presentations. We Hope You Enjoy the Show!