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What do these pictures have in common?

What do these pictures have in common?. Habitat:. What Bugs You?. What is a habitat?. The area or environment where an organism or ecological community normally lives or occurs Example: The habitat of a freshman at Virginia Tech is…The Virginia Tech Campus.

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What do these pictures have in common?

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  1. What do these pictures have in common?

  2. Habitat: What Bugs You?

  3. What is a habitat? • The area or environment where an organism or ecological community normally lives or occurs Example: The habitat of a freshman at Virginia Tech is…The Virginia Tech Campus. 2. The place where a person or thing is most likely to be found

  4. Why are habitats important? • Important for the success of the individual species • Interrelations between species- what hurts one hurts many

  5. What/Who Affects Wildlife Habitats? HUMANS!!!

  6. Expansion - population growth Industry Waste Pollution Use of resources Inattention Ignorance How?

  7. Copyright Bioengineering Group Inc. Sept. 1999

  8. Example: Impacts of Habitat Loss (Eaten by) Algae Mayfly Trout Bass Blue gill

  9. Bass Blue gill Trout Black bear Humans

  10. What happens when this… becomes this?

  11. Decrease in aquatic invertebrates Increase in algae levels Decrease in Water Quality Decrease in fish levels; stress. Stress

  12. How do we assess aquatic habitat? • Measurements of water quality • Macroinvertebrate sampling -Types of macroinvertebrates found -Diversity index • Habitat characteristic assessment -examples: erosion of banks, turbidity of water, type of vegetation found

  13. Questions?

  14. pH Measure of the number of H+ ions Scale: 1-14; acidic to basic pH of natural, unaffected waters ~6.5-8.5 Alkalinity Measure of buffering capacity How well a solution resists pH changes Bicarbonates bind up H+ Water Quality Variables

  15. Conductivity Ability of a solution to carry electric current Concentration of salts in water Heavy metals increase conductivity Dissolved Oxygen From photosynthesis and interaction with atmosphere 5-6ppm minimum for healthy growth D.O. depletion from microorganisms and built up organic matter Water Quality Continued

  16. Temperature Measure of hot/cold Affects fish activity Ranges specific to organism ex: trout prefer 48-65ºF but catfish prefer 75-90 ºF Other Parameters Hardness Ammonia Nitrites TSS And more Water Quality…

  17. Next Class • Evaluate Habitat • General Types and Characteristics of Macroinvertebrates • Introduction to Water Quality Project

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