Senken und Gruben

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Kathi Hofer (geb

Coral Reefs: A Very Short Introduction Tierspuren Senken und GrubenReefs and the coral life that builds them were for centuries a source of mystery to naturalists and hazard to seafarers. Many ideas were developed of what built them and why they all existed so close to sea level but never above it. Darwin developed the theory of how they were built, which was proven a century later. The coral polyp is central to each coral colony and to the reef. Each houses countless symbiotic algal cells that provide the energy