marine ecology mar 295 prof. pamela a. lynch introduction 5 oceans this course and the “scientific...
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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
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
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.
The Scientific
Method
-Used to help you “see” while you understand…
-Are these organisms different to you? (why?)
• 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
-- there’s still so much we don’t know…
•Seeing in the Dark– Water is nearly opaque to light, yet very transparent to
sound.
• Fig. 1.12M A multiple-beam sonar image of the coastal margin of southern California.
Courtesy NOAA
Courtesy NOAA