Unit 1: Conservation Abroad - Coral Reefs

HideShow resource information
View mindmap
  • Coral Reefs
    • Ecological Features
      • Polyps trap plankton with stick cilia or sting cells
      • Symbiotic algae live inside coral polyps and produce sugars
      • Warm, stable temperatures 25-29 Celsius
      • Bright sunlight for algal photosynthesis
      • Low turbidity - kills polyps otherwise
      • Constant salinity - osmotic problems with polyps otherwise
      • Hard substrate for polyp attatchment
    • Importance
      • Support over 1/4 marine species
      • Reef species produce biologically active substances for defence that can be used in medicine
      • Protect coasts from erosion, storm damage and flooding
      • Attract tourists - contribute to local economies
      • Carbon reservoir
      • Food source
    • Threats
      • Physical damage from divers, anchors and litter
      • Coral tourist souvenirs
      • Sediments from eroded farmland and coasts kill polyps
      • Mangrove forests removed - protect reefs from sediments
      • Coral bleaching - warm water causes polyps to eject algae = poor food chains
      • Limestone dissolves from increased acidity from increased carbon dioxide levels
      • Overexploitation and harmful fishing methods
      • Slow-growing corals may not photosynthesise if sea levels rise
      • Fertiliser leaching = more algae eutrophication
    • Conservation Methods: Marine Protected Areas/National Parks
      • Fixed mooring bouys
      • Educating divers and swimmers
      • No-take zones
      • Ecotourism and sustainable fishing
      • Safe waste disposal
      • Banning dredging
      • Protecting mangrove forests


No comments have yet been made

Similar Environmental Science/Studies resources:

See all Environmental Science/Studies resources »See all The Living Environment resources »