Download
the great barrier reef n.
Skip this Video
Loading SlideShow in 5 Seconds..
The Great Barrier Reef PowerPoint Presentation
Download Presentation
The Great Barrier Reef

The Great Barrier Reef

181 Vues Download Presentation
Télécharger la présentation

The Great Barrier Reef

- - - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript

  1. The Great Barrier Reef A Natural Wonder of the World

  2. Coral Reefs – What are they? • Coral: a tiny marine polyp that makes up the living part of the coral reef; they give the reef its colourful, swaying appearance • Coral Reef: a build-up of the ‘skeletons’ of dead coral; living coral ‘roots’ itself on the dead coral; dead coral is a white colour because it has calcified over time and has built up over hundreds and thousands of years

  3. A Coral Reef’s Demands • Warm, shallow, and clean salt water • 17c • Water no deeper than 27m • Easily killed by pollution (“bleached”) • Need lots of sunlight and plankton • Feed on minute plankton and invertebrate life forms

  4. What is the Great Barrier Reef? • It is the world’s largest coral reef • Over 2000km long (about the distance from here to Nova Scotia) • It stretches along the eastern coast of Queensland • It is made up of 2,900 individual coral reefs that are very close to one another

  5. So, what’s the big deal? • The Great Barrier Reef attracts about 1.5 million tourists every year and generates $1 billion annually – but why? • Superb weather • White sandy beaches • Lush rainforest islands • Clear blue, green, and turquoise ocean waters • Attractions include: scuba diving, snorkelling, swimming, surfing, sailing, bird watching, etc.

  6. Scuba Diving theGreat Barrier Reef • Scuba diving is the greatest attraction; enthusiasts travel from all over the world\ • Life on the Great Barrier Reef: • 1,500 species of fish • 400 different types of coral (fan, brain) • 400 types of mollusks (clams, sea slugs) • 500 species of seaweed • 215 species of birds • 16 species of sea snakes • 6 species of sea turtles • Winter migration ground for whales

  7. Increased Tourism = Increased Damage • Increased tourist activity has had negative environmental effects • How can we damage the reefs? • Trample and kill the coral (walking on it) • Scrape and bang the coral, making it vulnerable to disease (dragging diving gear, dropping anchors, dragging nets) • Removal of coral (souvenirs – very illegal) • Pollution (oil spills, pesticides, sewage dumping, fertilizers, boat fuel,) • Accelerates seaweed growth, which blocks out sunlight • Accelerates algae growth, which smothers the coral • Global warming

  8. Conservation and Protection Initiatives • The Great Barrier Reef Marine Park Authority has introduced park zoning (1975) • Is a way to minimize negative impacts of tourism • Reserves some areas of the Great Barrier Reef for enjoyment by the public, while others are preserved for their natural states and are left undisturbed (except for scientific research) • Was designated a World Heritage Site by the United Nations (1981) • Permanent dock built to avoid anchor damage • Education program targeted toward tour boat owners and tourists