Coral Reefs - National Geographic Society
网页2024年7月18日 · Coral reefs are important ocean habitats and offer a compelling case of the risks of climate change. Reefs provide a large fraction of Earth’s biodiversity —they have been called “the rainforests of the seas.”
Coral reef - Wikipedia
网页A coral reef is an underwater ecosystem characterized by reef-building corals. Reefs are formed of colonies of coral polyps held together by calcium carbonate. [1] . Most coral reefs are built from stony corals, whose polyps cluster in groups.
Coral reef | Description, Geochemistry, Origins, & Threats
网页2024年9月24日 · coral reef, ridge or hummock formed in shallow ocean areas by algae and the calcareous skeletons of certain coelenterates, of which coral polyps are the most important. A coral reef may grow into a permanent coral island. Often called the “rainforests of the sea,” coral reefs are home to a spectacular variety of organisms. Structure
Coral reef ecosystems - National Oceanic and Atmospheric Administration
网页2019年2月1日 · Coral reefs are some of the most diverse ecosystems in the world. Coral polyps, the animals primarily responsible for building reefs, can take many forms: large reef building colonies, graceful flowing fans, and even small, solitary organisms.
Home | Coral Reefs - Springer
网页Coral Reefs is a multidisciplinary journal focusing on diverse aspects of coral reef science and management. Official publication of the International Coral Reef Society. Publishes analytical and theoretical papers, full-length reports, reviews, and short notes.
Coral reefs: Essential and threatened | National Oceanic and ...
网页2016年4月14日 · 1. What are coral reefs? 2. Why are coral reefs important? 3. What threatens coral reefs? 4. Coral reef science and conservation. Coral reefs: One of Earth’s most diverse ecosystems. Healthy reefs are valuable to you. Challenges for coral reefs are both local and global. A hands-on approach to reef conservation. Focus areas: Ocean & …
Coral Reefs and Corals - Smithsonian Ocean
网页Coral reefs are the most diverse of all marine ecosystems. They teem with life, with perhaps one-quarter of all ocean species depending on reefs for food and shelter. This is a remarkable statistic when you consider that reefs cover just a tiny fraction (less than one percent) of the earth’s surface and less than two percent of the ocean bottom.
Coral Reefs - UNEP - UN Environment Programme
网页Coral reefs underpin the safety, coastal protection, well-being, food and economic security of hundreds of millions of coastal people in least-developed countries, economies in transition, and small island developing states around the world.
Coral Reefs Ecology & Biodiversity - Coral Reef Alliance
网页Although they cover less than 0.1% of the earth’s surface, coral reefs are the most biodiverse marine ecosystem in the world. Coral reefs are home to: 4,000 species of reef fish; 840 species of corals; Over 1 million species of other animals
Corals Tutorial: Why are coral reefs important? - NOAA's National …
网页This tutorial is an overview of the biology of and threats to coral reefs, as well as efforts being made to conserve and protect them. It includes images, animations, and videos. Coral reefs are some of the most diverse ecosystems in the world.