Präsentation über das Great Barrier Riff in Australien - PPT Datei
Powerpoint1.011 Words / ~20 pages
Great Barrier Reef By General information • It‘s the worlds largest coral system • The area extends to over 344,400 square kilometres • It‘s made of 2,900 individual reefs • Parts of it exist for over two million years • Since 1981 it‘s a part of the UNESCO World Heritage Site • 400 of the world‘s 700 types of corals live here • 4000 types of fish, 1500 types mollusc and very rare whales, dolphins and turtels live here What are corals? • a coral “group“ is a colony of identical polyps (a sac-like animal being only a few milimetres in diameter and a few centimetres in height with tentacles around a central mouth) • they are a part of the class Anthozoa along with anemones, stony corals and soft corals The corals’ way of life • Corals are nettles • Live in symbiosis with photosynthetic active algae • Grow…[show more]