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Biology - Ecosystems and communities 1011

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  • Figure 54.6 A West Indies manatee ( Trichechus manatus ) in Florida

Biology - Ecosystems and communities 1011 Biology - Ecosystems and communities 1011 Presentation Transcript

  • Ecosystems and Communities Biology Edgar
  • Relationships
    • Predation & herbivory
    • Symbiosis (mutualism, commensalism, parasitism)
    • Disease
    • Competition (competitive exclusion)
  • Predation
  • Fig. 54-6
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  • Community Energetics
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  • Net Primary Productivity
  • NO
  • MAYBE
  • YES
  • NPP=GPP-R
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  • Photosynthesis
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  • Cellular Respiration
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  • The Effect of Nitrogen
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  • How have pine and hardwood stands in a temperate forest responded to 15 years of nitrogen additions?
  • The Harvard Data Set Questions
    • how tree growth in northeast forests will respond to long-term N fertilization
    • measured leaf photosynthesis of pine needles in the control and high N plots
  • Harvard Forest The control (A and C) and high N addition (B and D) plots in the hardwood (A and B) and pine (C and D) stands at the Chronic Nitrogen Addition Study at the Harvard Forest in central Massachusetts (USA).
  • Data Set 1
    • how tree growth in northeast forests will respond to long-term N fertilization
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  • Data Set 2
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  • White Pine Study Milton Acadmy University of New Hampshire
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    • In 2006, mean monthly max ozone decreased and REIP remained elevated
    • High REIP’s in 2006 indicate healthy pine needles with high amounts of chlorophyll
    • In 2006, high REIP values corresponded to low ozone values as they have in most years
    • since Forest Watch began.
    • 2004 through 2006 are our highest REIP values.
    • REIP is rising over time, Our white pines are getting healthier!
  • High temperatures are required for ozone formation. Another important climate variable is wind patterns, which play a big role in the daily levels of ozone in New England. Source : EPA: http://www.epa.gov/region01/
  • White Pine Spectral Curve & Landsat Band Regions TM1 (Blue) TM2 (Green) TM1 (Red) TM4 (NIR) TM5 (MIR) TM7 (MIR) Water Absorption Water Absorption Cellulose Red Edge NIR 3 NIR 1 Leaf Pigments Cell Structure Water Content Lignin