1. Module 12 Continental Shelf Communities Part 2 February 28, 2013
Honors Marine Biology
Module 12
Continental Shelf Communities
Part 2
February 28, 2013

2. Class Challenge
Famous Autographs

3. Hart’s Landing Fishing Tournament
Field Trip
Our next field trip is scheduled for
Friday, April 19, 2013
Hart’s Landing Fishing Tournament
10:00am to Noon
If you are 16 or older Florida Law requires you to have a current Fishing License.

4. Class Quiz
Define:
Benthos
Nekton
Plankton

5. Define:
4. Subtitle
5. Infauna
Epifauna
7. Meiofauna:

6. Define and Draw
8. Continental Shelf

7. Benthos: Marine Organisms that live on the sea bottom
Nekton: Marine Organisms that swim strongly enough to move against the ocean current.
Plankton: Marine organisms that cannot swim strongly enough to move against the ocean current.

8. Subtidal: An area of the ocean that always stays under the water regardless of the tides.
Infauna: Organisms that buried in the sediment.
Epifauna: Organisms that can be easily seen swimming
Meiofauna: The microscopic creatures that dwell in between the sediment particles.

9. Define and Draw
Continental Shelf: is a gently sloping area beginning at a point near land, just below the low-tide mark. It continues out to the shelf break, with is the outer-edge of the continental shelf.

11. Continental Shelf Communities
In our last class we discussed different kinds of Continental shelf communities. They can be divided into two groups based upon the substrate of the ocean floor.
Soft-bottom shelf communities
Hard-bottom shelf communities
The type of substrate determines what types of organisms can populate the ocean floor.

12. Hard-Bottom Subtidal Communities
There are two major categories:
Rocky Bottomed Communities
Kelp Beds

13. Kelp Beds and Forests
In most of the cold temperate areas of the world, hard-bottom shelf substrates are inhabited by large, brown seaweeds known as kelps.
Kelps can grow quite tall (up to 30 meters) compared to other seaweeds.

15. Kelp Beds create a third dimension to the hard-bottom communities, in the same way that trees create canopy structures in forests.

16. Kelp Forests
In Kelp Forests a canopy is formed when the kelp is tall enough to stretch from the bottom of the subtidal community all the way up to the surface.
As a result, most of the kelp is underneath the water, but some of it is on top of the water as well.

17. Kelp Bed
When kelps are not tall enough to reach the surface and form a canopy, the community they form is called a kelp forest.
Marine Scientists use they terms interchangeably, but really should not.

18. Kelp Kelp attach to the substrate by a holdfast instead of true roots.
The trunk-like stipe extends upward from the holdfast and ends in one or more leaf-like blades.
These are hollow floats, called pneumatocytes, located at the base of the blades. This helps keep the blade at the water’s surface instead of sinding to the bottom.

19. Kelp

20. Kelp
Kelp do not need roots to absorb their nutrients from the sediment; rather, they directly absorb nutrients from seawater, just like phytoplankton and other algae.

21. Kelp
As a result, they need constant movement of water flowing past them in order to obtain a regular supply of necessary nutrients.

22. Kelp
Kelps can grow so large, however, because their leather-like surface keeps them from being fragile like other algae.
They can better survive strong currents that would otherwise tear their long, thin stipes.

23. Underwater Kelp Forests http://youtu.be/GcbU4bfkDA4
JEAN-MICHEL COUSTEAU: OCEAN ADVENTURES | Kelp Forest | PBS
(food web)

24. Life In The Kelp Forest

25. Lab: Animals and Plants in a Kelp Forest
Categorize Plants and Animals as a Producer Consumer Herbivore carnivore scavenger decomposer
Senorita Fish : Preditor, carnivore, Consumer
Sea lion- Big Flippers, ear flap :Consumer carnivore
Seals – no ear flap: Consumer carnivore
Stone crab : Consumer, herbivore, scavenger
Sea otter: Consumer, carnivore
Nudibranch (Sea Slug): Scavenger
Kelp: Producer
Sea lettuce: Producer
Jelly Fish:: Carnivore, Consumer
Commorant: Consumer, carnivore
Sea urchin: omnivore, scavengers
Sea Anemone : Consumer, herbivore
Coral: Consumer, omnivore
Sponge: Consumer, herbibore, decomposer
Sea Star: Consumer, carnivore
Bacteria: Decomposer
Fungus: Decomposer
Humans: Consumer, Omnivore
Shark: Consumer, carnivore
Killer Whale: :Consumer carnivore
Albatross:Consumer, Consumer, Carnivore
Annahinga: Consumer, Carnivore55

26. Mapping Identify on your map where the major Kelp beds are located.
See figure 12.11

27. Dirty Jobs
First Mike gets dirty harvesting kelp to feed abalone. Netflex

28. Homework What 2 items found in your kitchen contain Algae
Finish Reading Module 12 to page 303
Answer OYO to 12.13
Answer Study Guide
Class Quiz: Kelp Beds
Class Challenge: Photo of Animal that you took
Notebook Check on March 7th (Module 11)