Module 9: Intertidal Zones Part 1

The Intertidal Zone is the area of shoreline between high and low tides.  It is also known as the Littoral Zone.  This coastal strip where the land meets the sea is by far the smallest area in all the world’s marine environments, yet more is known about it than any other. This is a narrow strip of land that is only a few meters in width, and it is defined as the area between the oceans’ high tide and low tides.  Although it is small, it is the most accessible place to scientists, and is therefore the most studied marine habitat. Even though this zone is small, it has the greatest variation of environmental factors as compared to any other marine ecosystem.  There are even several differences within a single square meter containing huge diversities of life.  As the tides rise and fall, covering and then exposing areas along the coast we can observe the dramatic changes in the environmental conditions.

PowerPoint:  Honors Marine Biology Module 9 Intertidal Zones January 17, 2013 

Lab:  Intertidal Zone Organism Identification and Classification

Observations:    Specimen found and Zone

Sea Squirt:                             Upper and lower zone
Algae:                                     Upper, middle and lower
Shrimp:                                   middle and lower
Blue Crab:                              middle and lower
Juvenile lobster:                      lower
Mud crab:                                middle and lower
Spider crab (male):                  middle and lower
Minnows:                                 lower
Sand flea: amphipod               upper – attached to sea grass
Pike fish:                                  lower
Lightening Welk:                     lower
Ascidian:                                 upper attached to wall or rocks
Stone crab:                              middle and lower
Pistol Shrimp                          middle and lower
Arrow Shrimp                         middle and lower
Hermit crab                             middle and lower
Mussels                                    middle and lower

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Homework:

  1. Finish reading Module 9 to page 232
  2. OYO Questions 9.13 – 9.17
  3. Study Guide: Define  e-h and 19-28
  4. Finish lab
  5. Class challenge:  Who can do the most push-ups in one minute?
  6. Quiz:  Rocky Intertidal Zones:  See OYO question 9.11 and 9.12; Abiotic Conditions of Intertidal zones. Be able to name 15 different species living in the Intertidal Zone
  7. Notebook check.

Have a good week! -Mrs. S

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