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21.2 Life in the Oceans

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Katelynn Dorn

on 15 January 2015

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Transcript of 21.2 Life in the Oceans

Ocean Chemistry and Marine Life
plants regulate life
organisms, water, and bacteria cycle nutrients
nutrients on bottom must be moved up
upwelling- surface water moves further out from wind and deeper water replaces it
Sunlight and Marine Life
plants and plankton above 100 m
phytoplankton- remove dissolved gases, photosynthesize
zookplankton- eat phytoplankton
Nekton
fish, dolphins, squid
phytoplankton are base of food webs
benthos- oysters, sea stars, crabs, anemones, corals
Pelagic Zones
neritic
- on continental shelf: sunlight, moderate temp., low pressure, plankton & nekton
oceanic
- deep/open ocean waters
epipelagic
mesopelagic
bathypelagic
abyssopelagic
The Secret Lives of Baby Fish
Benthic Zones
intertidal
- between low tide and high tide lines, unstable environment, snails, crabs, mussels
sublittoral
- largest amount of benthic organisms
bathyal
- on slope, plants are scarce, octopuses and sea stars
abyssal
- sponges, worms, sea cucumbers
hadal
- trenches

21.2 Life in the Oceans
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