What are the main resources that corals compete for with each other?
Space and light
What is exploitative competition?
INDIRECTConsumption of a limiting resource by one species makes that resource unavailable
for consumption by another
Ex. upright, branch
Biology of Hermatypic Corals
Growth and Calcification
Zooxanthellae account for much of the corals
Although corals are primarily phototrophic
(dependent on zooxanthellae), corals with large
polyps & t
CORAL REEFS (EARTH 100)
Dr Michela Arnaboldi
STUDY GUIDE QUESTIONS
WHAT IS A REEF?
1. What are coral reefs?
2. Where do you mainly find them?
3. What portion of the coral reel is alive?
4. Over how long of a time span can coral reef develop?
Coral Reef Fishes
Gobiidae: Gobies - small, shallow marine habitats,
most feed on invertebrates, can adhere to rocks or
Serranidae: Sea bass and groupers several rows of
sharp teeth, carnivorous, most feed on fish and
crustaceans, ambush predators
What is a Coral?
Problem: Many different
organisms are a coral!
What is a Coral?-cont
Animal, vegetable or mineral?
Its an animal which
may live with a plant
and makes a mineralbased skeleton
Dr Michela Arnaboldi
Geological Science Department
3021 CC Little Building
Office Hours: by appointment
TEXTBOOK: Any Intro Oceanography textbook
CLASS WEB SITE: https:/ctools.umich.ed
Wrasses: Small, efficient carnivores (inverts); good swimmers and set up cleaner stations; bury
in sand at night
Feed on benthic invertebrates (Diurnal; stick to reef bottom at night)
Long, tubular snouts with a small mouth (Many long
What is a coral?
It's an animal which may live with a plant and makes a mineral-based skeleton
What is the taxonomic classification of stony corals?
Phylum: CnidariaClass: AnthozoaSubclass: HexacoralliaOrder: Scleractinia
What are octocorallia?
What are Coral Reefs?
Rock like structures made of calcium carbonate produced by living organisms
Where do you mainly find coral reefs?
Shallow tropical water, close to the coast.
What portion of the coral reef is alive?
Only the top layer
Over how long o
What are some other types of disturbances that can affect coral reefs?
3. climate change
4. Carbon Dioxide in the ocean
5. Global Warming
How do predators and competition affect coral reefs?
Crown of thorns destroy reefs; algal
Describe the extent of the biodiversity typical of coral reefs.
1. Btwn. 600,000 and 9 mil. Species
2. 25% of marine species rely on coral reefs
3. 32/34 metzoans live on reefs65% of marine fishes live in reefs
Which are some of the organisms that we can
What are the main families of fish found on coral reefs and what are some of their main
Gobiidae( Gobies), Serranidae (sea bass and grouper), Labridae (wrasses), Chaetodontidae
[Butterfly fish), Zanclidae [Moorish Idol), Acanthuridae [Su
What are shelf reefs?
Shelf reefs are reefs that grow on the margins of continents.
What are oceanic reefs?
Oceanic reefs are reefs that surround an island.
What is a fringing reef?
-Develop on the edge of continental landmasses- Youngest reefs-Attached t
What is coral reef zonation?
What is it based on?
Coral reef zonation is dividing the reef into zones based on physical parameters.
(Light intensity, depth, bottom topography, and waves)
What are the major zones within coral reefs?
How would you describe the geographical distribution of reef building corals?
The geographical distribution is mainly around the equator, mainly in the Indian and West pacific
How does temperature control the distribution of reef building corals?
What are some of the important characteristics that we discussed in class about sea cucumber?
Sea cucumbers are echinoderms that have collagen body walls, can release toxins, and are
What are some of the important characteristics that we discu
How do hermatypic corals feed?
-Use tentacles and nematocysts to capture small plankton-Absorption of dissolved organic
-Obtain part of their energy requirement from zooxanthellae. (mutualism with algae
How important are zooxant