Marine Ecology

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• Marine Ecology
• MAR 295
• Prof. Pamela A. Lynch
• Introduction
• 5 Oceans
• This course and the Scientific Method
• Early findings on Oceanography

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I think I can
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Fig. 2.1
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Fig. 2.2
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Fig. 1.10 M An equatorial view of the world ocean.
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A Different View of the Ocean Floor

• Fig. 1.5 (M) The major plates of the earth's
  crusts.

Courtesy of Reto Stockli, NASA Earth Observatory
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The Changing Marine Environment
Fig. 1.3 A summary of some biological and
physical milestones in the early development of
life on Earth. The blue curve represents the
relative diversity of life the orange curve
represents the oxygen concentration of the
atmosphere. Several of the terms used here are
defined in Chapter 2.
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• The Scientific
• Method
• Used to help you see while you understand
• Are these organisms different to you? (why?)

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Fig. 1.17
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Fig. 1.18
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Fig. 1.19
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Fig. 1.20
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Fig. 1.21
How does this apply to MARINE ECOLOGY?
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• How did the earth (and the oceans? and life?)
  form?

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Origin of our Solar System (5 bya)
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The Milky Way Galaxy which contains our solar
system (and planet)
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Hot gas filament (from the Sun)
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Outgassing (volcanism) Source of our early
oceans?
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Or comets (delivering surface water)?
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Hydrothermal vent (mineral surface) 1st life on
earth?
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Bacterial fossil, 3.5 bya
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Fig. 1-18, p. 16
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• Now that we have thought about how the oceans may
  have formed we can study them! What have we
  found?
• -- Soundings/Bathymetry tells us depth and
  topography and what lives on the bottom of the
  ocean floor
• -- Geology tells us about our 3 layers and
  density
• -- theres still so much we dont know

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Fig. 1.5
You can look at the surface
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Fig. 1.7
Or go MUCH deeper
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• Seeing in the Dark
• Water is nearly opaque to light, yet very
  transparent to sound.

Courtesy NOAA

• Fig. 1.12M A multiple-beam sonar image of the
  coastal margin of southern California.

Courtesy NOAA
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Fig. 2.19
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Fig. 2.3
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Fig. 2.9
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Fig. 2.25
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Fig. 2.26
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Fig. 2.27
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