honors marine biology module 4 october 18, 2012 corals and tube worms
TRANSCRIPT
Our next Wet lab Field Trip
Saturday October 27, 2012 from 10:00am to 12:00 noon.
Quick Point Park: South end on Longboat Key. Park on the left side of the road at the park.
We will be using plankton nets and microscopes.
REMEMBER…..
If you will be absent, I will need a written excuse from your parent. You will need to make up the lab. See me for your make-up lab.
Algae Songhttp://youtu.be/l2cymXvLSrQ
• phaeophyta rhodophytared and brown algae phylamulticellular diff tissuecommon use today is in thickening glue
microscopic macroscopic filamentous toored algae sans flagella oooh
phycobiliproteins give red its huefucoxanthin brown not blue
feather boa kelp and agarweedare here to representthis algal family
Anthoza Cnidarians
• http://youtu.be/rQDoSedAq4w
• http://youtu.be/zkVo-H7bfxs soft corals
• http://youtu.be/RYVHK2vM1_Y Cnidarian Aneomone eating a fish
http://youtu.be/NbpB5F9CcLc box jellies
Class Anthozoa
• Represents the largest group of cnidarians.
• Corals and Sea Anemones – These organisms have a more complex structure than the hydrozoans or scyphozoans.
• Their gastrovascular cavity is lined with vertical partitions called Septa that provide greater surface area for digestion.
Corals
Most corals are made up of colonies of individuals with layers of ectodermal cells that secrete protective walls of calcium carbonate into which the polyps can hide when threatened.
What makes many corals different from other anthozoans?
They have cup-like walls around each polyp. These polyps remained attached to each one another after budding. This forms the coral reef.
Reef building corals grow faster than other corals because they have the help of symbiotic dinoflagellates called zooxanthellae.
Zooxanthellae
• Produce carbon-containing compounds (like sugar) by photosynthesis, and they give some of those compounds to the corals.
• The corals then use the those compounds for energy, and they also use the carbon in those compounds to form the calcium carbonate they need to make the protective walls.
• Even through the corals get some food from the zooxanthelle, they also eat plankton that float in the water.
Other Notable AnthozoansColonial anthozoans that form branching or
elongated skeletons:• Sea Fans• Sea Plumes• Black Corals
Colonies that do not have hard skeletons:• Soft Corals• Sea Pens
No skeletons:• Sea Anemoes
Bilateral Worms
• Bilaterally symmetrical: Animals with this type of symmetry have a defined head end (anterior) and rear end (posterior), a right and a left side, and a top and bottom surface.
Dorsal: Referring to the top (or back) surface of an animal.
Ventral: Referring to the bottom (or belly) surface of an animal.
Bilateral Marine Worms
Flatworms: Their dorsal and ventral sides are flat like a pancake.
These flatworms have the simplest organization of organs and organ systems among all bilaterally symmetric animals.
There are three types: 1. Turbellarians2. Trematoda3. Tapeworms
Symbiotic Relationships
Mutualism: A relationship between two or more organisms of different species where both benefit from the association.
Commensalism: A relationship between two or more organisms of different species where one benefits and the other is neither harmed nor benefited.
Parasitism: A relationship between two or more organisms of different species where one benefits and the other is harmed.
Homework
• Take Module 4 Test
• Read Module 5 pages: 97 – 107
• OYO Questions 5.1 – 5.5
• Study Guide Questions: Define a-e and questions 2-9
• Finish up labs
• Class challenge