Term
| what type of coral is the reef building kind? |
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Definition
| hermatypic coral is reef-building coral |
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Term
| coral reefs consist of what two organisms? |
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Definition
| coral reefs consist of heterotrophic polyps and autrophic algae |
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Term
| how do coral reefs react to changing coniditions? |
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Definition
| polyps react to changing conditions by bleaching, which means ejecting thier algae and then taking in new algae that is better suited to the new environment |
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Term
| where are most coral reefs found? |
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Definition
| most coral reefs are found in areas near the equator on the west side of land masses. The west side of land masses is where the warm water gets pushed by global currents |
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Term
| draw a diagram that includes fringe reefs, platform reefs, and barriers reefs |
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Definition
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Term
| fringe reefs are found where? |
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Definition
| fringe reefs are found next to mainland or on high islands |
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Term
| what kinds of reef have no continental sediment? |
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Definition
| platform reefs, barrier reefs, and atolls have no continental sediment |
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Term
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Definition
this is how atolls form
1st a volcanic island is made by a moving volcanic hotspot
2nd the volcanic island gets a ring-shaped fringe reef around it.
3rd the hotspot moves on, and with nothing to keep feeding it, the heavy volcano starts to sink. The reef sinks too, but grows vertically to near surface. |
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Term
| what is the coral reef response to destructive storms? |
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Definition
| after destructive storms, the coral gets stripped off and then has to regrow |
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Term
| what is the main threat to reef crests? how does the morphology of reef crests reflect this threat? |
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Definition
| the biggest threat to reef crests is high wave energy. The reef crests evolve to not branch out, to stay consalidated so that waves don't wash them away |
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Term
| what is the biggest threat to reef fronts? how does thier morphology reflect this? |
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Definition
| Reef fronts are deeper underwater, and get less light. Thus, they evolved to branch out to increase surface area and get more light for photosynthesis. |
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Term
| on what part of the reef profile is wave energy focussed? |
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Definition
| wave energy is focussed on the reef crest |
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Term
| sediment cores from reefs often seeing mixing from this process that goes beyond the typical beach process perspective |
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Definition
| sediment cores from reefs are often subject to bioturbation, a process beyond the scope of the typical beach process perspective |
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Term
| these two processes can detach coral from the ground |
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Definition
these two processes can detach coral from the ground
1. storms
2. bivalves |
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Term
| draw the reef platform sediment system |
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Definition
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Term
| describe internal reef structure |
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Definition
| the structure of reefs is a porousm, holey skeleton |
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Term
| what occurs when freshwater dissolved CaCO3 on the beach, and then the CaCO3 cements the sand together? |
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Definition
| when freshwater dissolves CaCO3 and then the CaCO3 acts as cement and fuses the sand together, you get beachrock |
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Term
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Definition
| beachrock is when freshwater dissolves CaCO3 on the beach, and then the CaCO3 fuses together the sand |
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Term
| what are island storm deposits? |
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Definition
| island storm deposists are piles of poorly sorted sediment on the back ends of beaches |
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Term
| what does a pile of poorly sorted sediment on the back end of a beach indicate? |
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Definition
| a pile of poorly sorted sediment on the back end of a beach indicates that a strong storm pushed the sediment there. it's called and island storm deposit |
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Term
| what do we call a pile of dead coral pushed high on to shore by storms? |
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Definition
| basset edges are piles of dead coral pushed high up on the shore by storms |
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Term
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Definition
| basset edges are piles of dead coral pushed high up on the shore by waves |
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Term
| what are the corals we use for looking at past sea level called? |
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Definition
| the corals used for examing paleo sea levels are called microatolls |
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Term
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Definition
| crown of thorns are a type of starfish that negatively impact coral reefs. Outbreak of crown of thorns has gotten worse as global temperatures rise, and will continue getting worse |
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Term
| what is the name of the clam that Deirdre's PhD student studied? |
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Definition
| Deirdre's grad student looked at Tuatua clams |
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Term
| which is worse for Tuatua, horses or cars? |
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Definition
| horses are worse for Tuatua than cars |
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