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1. __________ is NOT a process that decreases the salinity of seawater.a. icebergs melting c. runoff from land
b. precipitation d. evaporation
2. The ________ layer of the ocean experiences a rapid change in density with depth.a. deep zone c. thermoclineb. mixed zone d. pycnocline
3. ________ is a major source of elements in seawater.a. solar radiation c. lakesb. Earth’s interior d. meteorites
Warm-up Week 3 # 2
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“Diversity of Ocean Life & Productivity”
15.2 & 15.3
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What are some types of
different ocean organisms?
ScalesShellsLightsSuckersTeethNo TeethHardSoftFast Slow
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Where do these things live?!
• Most ocean organisms live in sunny surface waters
• ↑ Sun = ↑ Algae
• Algae = food.
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Classifying Marine Organisms:
Where live & How move.
1. Plankton– Floaters (drift with currents)– Planktos = “wandering”
2. Nekton– Swimmers (in control)– Nektos = “swimming”
3. Benthos– Bottom dwelling– Benthos = “bottom”
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Marine Life Zones
Affected by:1. Available Sunlight
2. Distance from Shore
3. Water Depth
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Sunlight
Photic Zone• “Photos” = light• Where there is light
Depth of light:– Amount of Nekton– Sediment particles– Intensity of sunlight
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Distance from Shore
1. Intertidal Zone– Beach
2. Neritic Zone– Cont’l. Shelf– Most ocean life
3. Oceanic Zone– Cold, deep, dark
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Water Depth
1. Pelagic Zone– Open ocean
– Any depth
2. Benthic Zone– Seafloor
3. Abyssal Zone– Deep Benthic
Zone
– ↑ Pressure!
– Little Life.
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Marine Productivity!
Producer makes stuff– Photosynthesis– Chemosynthesis
Consumer uses stuff– Chemical energy is transferred by feeding.– Feeding = Inefficient!
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Inefficient! Loses energy with each step!
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Food Chain
Food Web