1. EQ: How are Marine Ecosystems affected by abiotic factors?
Population Dynamics:
Aquatic Ecosystems
Tie in properties of water – expand when freezing, universal solvent, ability to moderate temp
EQ: How are Marine Ecosystems affected by abiotic factors?

2. Angler fish Video response questions- LEFT SIDE
Why does it have a light attached to it’s head?
Is there a lot of sunlight?
Why is the Angler Fish’s teeth/mouth so big?

4. Name some marine ecosystems you know:
Coral Reefs, Deep-Sea Thermal Vents, Open Ocean, Estuaries, Marshes, etc.
What abiotic conditions define, affect, and distinguish these systems?
Sunlight, Temperature, Salinity, Depth, etc.

5. Marine Ecosystem is an ecosystem in water
Shaped by abiotic factors (salinity, depth, temperature, sunlight and chemistry)

6. Ocean Zones
Intertidal Zone
Neritic Zone
Bathyal Zone
Abyssal Zone

7. Description of Ocean Zones
Intertidal zone: organisms must tolerate a range of conditions
Neritic zone: few meters to 200 m, most ocean life lives in this zone
Bathyal zone: 200–2000 m, turbid, murky water
Abyssal zone: depths greater than 2000 m, complete darkness

8. Costal marine ecosystems
Estuary
Coral reef

9. Estuary
Definition: Partially enclosed body of water formed where river flows into an ocean

10. Estuary
Description: Mixture of salt and fresh water; highly productive ecosystem

11. Estuary
Threats: removal due to development means loss of coastal barrier; less protection from storms and floods

12. Estuary
Other Factors:
Plankton-based food web

13. Recall: Biotic Factors

14. Recall: Abiotic Factors
Ex: Temp., depth, salinity, light

15. Factors affecting distribution of aquatic life:
Geography
Depth
Light
Temperature
Chemistry
Salinity pH

16. 1. Geography
The study of physical features of the Earth and its atmosphere including
distribution of populations
Resources, land use, and industries

17. 2. Depth Depth is the distance from the surface of the water
Pressure increases as depth increases (deeper)
Most organisms with gas-filled spaces (like us) would be crushed by the pressures that other deep-sea life experience.
Most organisms living in the deep ocean are largely water and water is incom­pressible. Without gas-filled spaces, organisms in the great deep are less affected by pressure.

18. 3. Light
As you go deeper into the water, the amount of light decreases and it gets darker
Aquatic ecosystems are divided
into two zones:
Photic zone
Aphotic zone
What chemical process is light important to?

19. Stop and think (about water)
Between winter and summer, why does the average temperature on land change much more than the average temperature of water?
Water’s ability to moderate temp (High heat capacity)
If you were to get into a submarine and dive deep into the ocean, what would happen to the temperature of the water and why?

20. 4. Temperature
As you go deeper, the temperature decreases (colder) because there is less sunlight
Temperature is also affected by Latitude or distance from the equator
Further from the equator, temperatures will be colder

21. 5. Chemistry- pH pH is the acidity of the water
majority of aquatic creatures prefer a pH range of , if the pH is too high or low, the aquatic organisms will die
pH is affected by Oxygen and Carbon Dioxide
O2 is needed for respiration in marine organisms
CO2 molecules interact with water molecules to decrease the water’s pH
Where in aquatic ecosystems would you expect to find more oxygen? Why?
What process is carbon dioxide important to as a reactant?

23. Chemistry- Salinity
Salinity is the measure of all the salts dissolved in water.
Aquatic ecosystems include bodies of water varying in salinity
fresh water, salt water and estuaries.
Global warming – decreasing salinity
In areas with high evaporation, the water will have a higher salinity because the salt is not evaporated with the water.
Organisms have specific salinity ranges in which they can survive.
Global warming- it causes the icebergs to melt, adding freshwater back to the oceans; The additional freshwater will decrease the amount of salt in the surrounding water.

24. Salinity
Give an example of the three types of aquatic environments in Jacksonville.
Atlantic ocean (salt water)
St johns river, retention ponds, parts of intercostal (fresh water)
Heckscher Drive, Big Talbot and Little Talbot (Estuaries in the marshes)
The Atlantic Ocean is saltwater. Examples include the St. John’s River, retention ponds and parts of the intercostal are freshwater and estuaries can be found in the marshes (for example Heckscher Drive, Big Talbot and Little Talbot).

25. Check for Understanding
Which species is a producer?
Species B
Which species can survive best in cold environments?
Species A
Which species is least affected by temperature?
Species C

26. Marine Ecosystems C- level 2 voice H- ask three before me
A- aquatic ecosystems sheet
M- remain seated at your assigned table
P- complete your sheet and paste to the left side of your notebook.
Success!
Complete Marine Ecosystem WS
Garb a laptop and sign into Penda
Blended learning Penda
Center ID: 32205RELHS
User/password: s(student#)
Complete “Limiting Resources”
*If you finish, complete any unfinished Edpuzzles (food webs, populations)