SCI 3010 Environmental Science

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Readings Lecture Seven We will address some
issues related to Ecology and Biology. Review
very quickly the previous readings on Roosevelt
and Muir in your text p 13 14 just to remind
yourself of the difference between utilitarian
and biocentric viewpoints. Photosynthesis
text p34 -35 (not Fig 2.12) Figure 2.14 and
vocabulary from pages 36 39 population,
producers, consumers, productivity/biomass, food
web, trophic level, herbivores, carnivores,
decomposers,
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Environmental Science SCI 3010

• Seven Basic Principles of Science
• (for each of these, but especially for s 1, 4,
  6, 7, can you write a short paragraph that uses
  something we mentioned in class to explain this
  idea. )
• 1. we can learn about the world by looking at it.
  
• 2. things happen in similar ways thoughout the
  universe
• 3. simple is best
• 4. knowledge is imperfect
• 5. knowledge is reproducible
• 6. proof is rare
• 7. knowledge is falsifiable (can be tested)
• (from Table 1.1)

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This is a team of museum artists restoring the
preserved body of one of the most famous
Elephants ever. Jumbo was the wildly popular
star of the zoo in London until the zoo sold him
to the American entrepreneur P. T. Barnum. Jumbo
was exhibited around America but was killed in a
train accident in 1885. Barnum donated the
preserved body to a museum at Tufts University
which made Jumbo its school mascot. The body was
destroyed in a fire in 1975.
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Elephant at the Smithsonian Institute in
Washington D.C.
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A worker cleans the elephant herd at the American
Museum of Natural History in New York City
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SCI 3010 Environmental Science
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How does an ecosystem work?
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Food production
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SCI 3010 Environmental Science
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SCI 3010 Environmental Science
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These are kernels of wheat, sometimes called
wheat berries (a botanist would not call this a
berry!) They are basically just the seeds grass
seed of the particular variety of grass known as
wheat. The have a tough protective husk, a
germ (the embryo plant) and the endosperm the
storage area full of starch and protein. For
the embryo plant to grow, the starch must be
converted back to sugar the embryo will use
that food to grow until it can make its own food.
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Cellulose Vs. Starch
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Producers, consumers, herbivore/carnivore,
decomposers
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Fungi - decomposers
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SCI 3010 Environmental Science
Trophic level, biopyramid/food pyramid
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Fig 2.18 in text
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SCI 3010 Environmental Science Fig 2.17 in text
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Food Web Exercise in Class. Calculating the
loss in energy in passing from one trophic level
to another