BIO 475 Study Guide - Comprehensive Final Exam Guide - Coral, Algae, Zooxanthellae
Document Summary
Gulf stream brings warm water from caribbean to bermuda. Bermuda is a sub-tropical location, fluctuation of sea surface temp. Originated as a volcano, 100 million years ago. Active volcano breaks surface and erupts; lava. Calcifying organisms; sponges, clams, worms, corals; builds a reef. Reef comes up to surface of water; fringing reef. Volcano eventually cools, becoming more dense, and begins to sink. Erosion in middle of the habitat creating a lagoon. Land continues to sink and settle, end up with island surrounded by a lagoon and reef crests on either side; atoll. Volcanic activity laid down alternate layers of lava and ash. Sand and silt was washed out to shelves. Of shell-bearing organisms formed a thick cap of limestone and limy sandstone. Added to by the growth of coral colonies. Rocks, black/gray/jagged; all exposed rock in bermuda is limestone or sandstone, cyanobacteria causes the black coloration. original volcano completely submerged. Giant lagoon on n shore bermuda island south slope shore.
