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Applications and Investigations in Earth Science (9th Edition)
9th Edition
ISBN: 9780134746241
Author: Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Publisher: PEARSON
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Question
How do you think oxygen reaches the deep ocean for use by the animals living there?

Transcribed Image Text:1,000 –
4,000
E 2,000
O2
Co2
-8,000
3,000 -
12,000
4,000 -
1
3
4
5 6
+ 02
44
46
48
50
52
CO2
Concentration of dissolved gas
in milliliters per liter (m/l)
Figure 7.8 How concentrations of oxygen and carbon dioxide vary
with depth. High concentrations of oxygen at the surface are usually
by-products of photosynthesis in the oceans brightly lit upper layer.
Since plants and plantlike organisms require carbon dioxide for pho-
tosynthesis, surface CO, concentrations tend to be low. A decrease in
oxygen below the sunlit upper layer usually results from the respiration
of bacteria and marine animals, activity that tips the balance in favor
of carbon dioxide. Oxygen levels are slightly higher in deeper water
because fewer animals are present to take up the oxygen that reaches
these depths.
Bu ween ebetuage
Depth (ft)
(w) yıdeg
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