Warm-up Week 3 # 2 1.__________ is NOT a process that decreases the salinity of seawater. a.icebergs meltingc. runoff from land b.precipitationd. evaporation 2.The ________ layer of the ocean experiences a rapid change in density with depth. a.deep zonec. thermocline b.mixed zoned. pycnocline 3.________ is a major source of elements in seawater. a.solar radiationc. lakes b.Earth’s interiord. meteorites

“Diversity of Ocean Life & Productivity” 15.2 & 15.3

What are some types of different ocean organisms? Scales Shells Lights Suckers Teeth No Teeth Hard Soft Fast 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

REVIEW: 1.If you lived in the ocean and you had no arms and no legs what kind of marine organism would you be? 2.What are the 3 things that affect marine life zones? 3.What happens every time energy is transferred through feeding? Nekton = Float with currents Sunlight, distance from shore, water depth Energy is LOST

Warm-up 1.How do plankton differ from nekton? a. Plankton are floaters. c. Plankton are carnivores. b. Plankton are strong swimmers d. Plankton live on the ocean bottom. 2.The ___________ is the ocean zone is characterized by high water pressure, low temperatures, and no sunlight. a. pelagic zonec. abyssal zone b.intertidal zoned. neritic zone 3.Which animal(s) would have the greatest chance of survival? a.one that fed through a food web b.one that fed through a food chain c.one that ate a wide variety of prey d.both a and c (food web & variety of prey)