Module 8: Marine Ecology

January 6, 2015 PowerPoint  Honors Marine Biology Module 8 January 20, 2013

Food Webs of the Ocean

Feeding relationships are often shown as simple food chains – in reality, these relationships are much more complex, and the term ‘food web’ more accurately shows the links between producers, consumers and decomposers.  A food web diagram illustrates ‘what eats what’ in a particular habitat. Pictures represent the organisms that make up the food web, and their feeding relationships are typically shown with arrows. The arrows represent the transfer of energy and always point from the organism being eaten to the one that is doing the eating. Organisms in food webs are commonly divided into trophic levels. These levels can be illustrated in a trophic pyramid where organisms are grouped by the role they play in the food web.

Trophic levels energy pyrmid

 

In class we demonstrated a food web

Food Web Demonstration

Food Web Demonstration

artificial-reef-in Sarasota Bay                            Reef Ball in Sarasota Bay manufactured by Reef Innovations.

Man’s activities and natural disasters have led to a reductions in our natural reef systems. Recreationally, growth in sports fishing, scuba diving, and boating has increased the pressures on these systems. Commercially, our seafood industry is dependent on developing the ocean to enable ever larger, yet sustainable, harvests. The loss of our natural systems, coupled with increased use, compels us to do everything we can to save natural reefs. Even so, the natural reefs cannot rebuild themselves fast enough to meet human demands. Long lasting artificial reefs are useful tools for restoring our reef systems to a natural and productive balance. In class we watched NetFlex Season 3 Episode 12 Dirty Jobs with Mike Rowe as he was in Sarasota at Reef Innovations learning to build reef balls.

Experiment 8.A:  Plant and Animal identification of Mud Flat Ecosystems

  1. Observe, identify and classify and draw samples collected from a mudflat
  2. Macroscopic observation
  3. Microscopic observation

See PowerPoint for specimens.

Homework:

  1. Module 8 Finish all reading, OYO and Study Guide questions;
  2. Take Module 8 test;
  3. Finish up Lab 8.A:  Mud Flat
  4. Class quiz:  Food Web/Energy pyramid;
  5. Class Challenge:  Sing/play an instrument;

At our next class, we will be beginning Underwater SeaPerch project.

Have a great week! -Mrs. S

 

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