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

“Diversity of Ocean Life & Productivity”

15.2 & 15.3

What are some types of

different ocean organisms?

ScalesShellsLightsSuckersTeethNo TeethHardSoftFast Slow

Where do these things live?!

• Most ocean organisms live in sunny surface waters

• ↑ Sun = ↑ Algae

• Algae = food.

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”

Marine Life Zones

Affected by:1. Available Sunlight

2. Distance from Shore

3. Water Depth

Sunlight

Photic Zone• “Photos” = light• Where there is light

Depth of light:– Amount of Nekton– Sediment particles– Intensity of sunlight

Distance from Shore

1. Intertidal Zone– Beach

2. Neritic Zone– Cont’l. Shelf– Most ocean life

3. Oceanic Zone– Cold, deep, dark

Water Depth

1. Pelagic Zone– Open ocean

– Any depth

2. Benthic Zone– Seafloor

3. Abyssal Zone– Deep Benthic

Zone

– ↑ Pressure!

– Little Life.

Marine Productivity!

Producer makes stuff– Photosynthesis– Chemosynthesis

Consumer uses stuff– Chemical energy is transferred by feeding.– Feeding = Inefficient!

Inefficient! Loses energy with each step!

Food Chain

Food Web