MSC 230 Lecture Notes - Lecture 2: Calcification, Subsidence, Cnidaria
2 May 2016
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Document Summary
Coral reefs: built by scleractinian stony , cemented together by coralline algae. Box jellies: scyphozoa- classic jellies, our corals are anthozoa. Tentacles in multiples of 8: hexacorals. Symbionts are in gastrodermal layer: outer and inner tissue layer. Anemone: little lines are mesenteries- go to inner cavity and would contain contracting muscles. Polyp structure: skeleton is not a solid block, it would be inefficient use of calcium carbonate to make one block of limestone, lays down a plate, picks up and then lays down another plate. Acropora palmate- elkhorn coral threatened, they can hybridize: hybrid vigor. Siderastrea sidereal & diploria strigosa: massive corals, strigosa is brain coral, strigosa- christmas tree worm. Dichocoenia stokes: does both types of budding, pinnaple coral. Montastaea cavernosa: they can have long sweeper tentacles. Farther off= barrier reefs creating a navigable inner channel: gbr, florida keys. Atoll: indo-pacific, not near any land at all, can be in the middle of the ocean.
