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EOSC326 Lab 4
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- EOSC326 (EOSC326)
- Institution
- University Of British Columbia (UBC )
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Lab 4 (Case Study 2) - Reef Communities: EOSC 326 98A 2022S1 Earth and Life Through Time 2022-06-20, 8:57 PMLab 4 (Case Study 2) - Reef Communities
Due Jun 13 at 11p.m. Points 55 Questions 48
Available Jun 7 at 12p.m. - Jun 13 at 11p.m. 6 days Time Limit None
Instructions
There are many extinction events in the Phanerozoic that have significantly affected reef communities
including the "big five" mass extinction events that were discussed in Module A. These extinctions
occurred in the Late Ordovician, Late Devonian, end-Permian, end-Triassic, and end-Cretaceous. In
addition, reef communities have been adversely affected by many other extinction events since they
first arose.
Reef communities are often particularly hard hit by extinction events when compared with organisms
from other environments. They are usually lost early in the course of a severe extinction event and
high diversity faunas can take a long time to recover following the return of normal environmental
conditions. In addition to other factors, this is because it can take a long time to re-establish the
complex interactions that foster species diversity.
The seven groups you learned about in the first part of Case Study 3, are some of the main
components of the reef ecosystems in Earth's past. We will now take a closer look at the roles that
each of these organisms have played in reef ecosystems over geologic time.
Although we will be primarily limiting our discussion to the animals specifically explored so far, it is
important to recognize that many other organisms have also been a part of reef ecosystems in the
geologic past. In particular, algae has played a major cementing role in virtually every reef community.
Furthermore, groups such as gastropods, bryozoans, echinoids, trilobites, and cephalopods have
also been important components of reefs at various times in the geological past.
Lab Components
This lab has four parts as follows:
Part 1
Fossil Identification
https://canvas.ubc.ca/courses/95005/quizzes/494926 Page 1 of 52
,Lab 4 (Case Study 2) - Reef Communities: EOSC 326 98A 2022S1 Earth and Life Through Time 2022-06-20, 8:57 PM
Part 2:
Video (Hike to the Fossil Reef)
Part 3:
Guided Reading of Lipps and Stanley (2016)
Part 4
Video 1 (Great Barrier Reef)
Video 2 (New Fossils Found at Great Barrier Reef)
Video 3 (Coral Bleaching)
Short Paper from National Geographic (State of Great Barrier Reef Today)
Estimated timing
Individual Portion
This lab should take you 2 - 3 hours to complete. For Part 3 (Lipps and Stanley paper) I recommend
you work through the questions as you read through the paper. It is really a guided reading exercise.
You can then come back and finish off any questions you were stuck on later. Please remember not
to click 'submit' until these questions are ready to go in for grading, as you won't be able to access it
again after that.
Group Portion
There is no group portion to this exercise.
This quiz was locked Jun 13 at 11p.m..
Attempt History
Attempt Time Score
LATEST Attempt 1 1,560 minutes 55 out of 55
Score for this quiz: 55 out of 55
https://canvas.ubc.ca/courses/95005/quizzes/494926 Page 2 of 52
,Lab 4 (Case Study 2) - Reef Communities: EOSC 326 98A 2022S1 Earth and Life Through Time 2022-06-20, 8:57 PM
Submitted Jun 9 at 1:55p.m.
This attempt took 1,560 minutes.
Part 1 - Fossil Identification
Use the Case Study 3 Course Notes to identify and answer questions
about the following fossils that are important in the history of reef
systems.
Specifically, identifying these questions will improve your ability to…
recognize different fossil specimens from actual hand samples; and
use your knowledge of the features and characteristics of the
groups you read about in the case study notes to identify real
specimens and/or features.
Question 1 pts
To what taxonomic group does this specimen belong?
https://canvas.ubc.ca/courses/95005/quizzes/494926 Page 3 of 52
, Lab 4 (Case Study 2) - Reef Communities: EOSC 326 98A 2022S1 Earth and Life Through Time 2022-06-20, 8:57 PM
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sponge
coral
brachiopod
stromatoporoid
bivalve
Correct!
archaeocyathid
Question 2 pts
If you were out for a hike and you noticed specimens like the one in the
video for Question 1 in a rock outcrop, what could you reasonably say
as far as the most likely age of this rock outcrop?
https://canvas.ubc.ca/courses/95005/quizzes/494926 Page 4 of 52
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