The biggest threats to coral reefs are pollution, overfishing, coastal development, and climate change. Countless numbers of creatures rely on coral reefs for their survival. Coral reefs worldwide are in serious decline because of coral disease and bleaching primarily brought on by underlining human induced disturbances. The reefs identified as being at greatest risk are in South and Southeast Asia, East Africa, and the Caribbean. We work to preserve coral reef ecosystems, empower local communities, raise public awareness and valuate marine ecosystems. Diseases are also often responses to nonbiological stresses-  increasing sea surface temperatures, ultraviolet radiation and pollutants will also negatively impact reef health. It covers over 2300 kilome ... × Close Assign Reefs at Risk. These important habitats are threatened by a range of human activities. And warming oceans affect coral too. There are several primary reasons as to why coral reefs are in danger:Rising acidity in the ocean - Carbon dioxide in the air dissolves into the ocean, forming carbonic acid. Why Are Coral Reefs At Risk? These species can then multiply rapidly by radically modifying the ecosystem. Deep-sea coral reefs face challenges as changes to ocean chemistry triggered by climate change may cause their foundations to become brittle, a study suggests. The IPCC predicts an increase in average air temperature of 1.5°C by 2030 to 2050. But coral reefs are in danger of disappearing, say experts. Coral reefs are vital to maintaining the diversity and viability of marine ecosystems. By Kerry Lotzof. It is also taken to use for souvenirs and jewelry. Climate change = ocean change. This warming is causing sea levels to rise and is creating problems for coastal areas. It also has a variety of medical uses: researchers use coral for bone graph clinical trials and dead coral is harvested for use in calcium supplements. Almost 95% of coral reefs in Southeast Asia are threatened. Nutrient enrichment (eutrophication) promotes the development of algae. Plastic is also a threat to coral. Coral reefs support more species than any other marine environment and rival rainforests in their biodiversity. Corals live in a symbiotic relationship with algae and both benefit from each other. ... Reefs at Risk. When pollutants enter … Bottom trawling, which involves industrial trawlers dragging nets across the bottom of the ocean, can decimate coral reefs. Coral reefs are vital to maintaining the diversity and viability of marine ecosystems. I. OVERVIEW – CORAL REEFS AT RISK AND THE ROLE OF TRADE Coral reefs are among the most diverse and valuable ecosystems on earth. Climate change, pollution, and overfishing are the top threats to coral reef. It can be used for limestone and construction materials or made into cement for new buildings. An IUCN survey during 1984-1989 found that people had significantly damaged or destroyed reefs in 93 Effective management is essential and urgent if we are to prevent the collapse of two-thirds of the world's coral reefs. Overfishing, pollution and coastal development are at the top of the list of chronic stressors. While it is well known that the coral reefs are at risk, many do not understand why. Overfishing of certain species can easily affect the ecological balance and biodiversity of the reef. This has led to many scientists conducting studies on global coral reef ecosystems to gain a better understanding of the cause and effects of coral reef damage. Last month WRI (World Resources Institute) released its report on threats to coral reefs, Reefs at Risk Revisited, a three-year study that resulted in the greatest-detailed global maps to date.The maps were produced in partnership with the Google Earth Outreach Development Grant and are meant to protect critical areas through mapping. Jeremy Moore, Reef4Akumal A. C. / Expedition Akumal, recently met with Baruch Figueroa-Zavala, coordinator of Coastal Research, to pinpoint the threats posed to the health of our local Caribbean waters and its coral reefs. However, since the 1950s, and at an accelerating pace, humankind has added significant new pressures ranging from out- right mining of coral for building materials, widespread pollution, and destructive fishing practices to loss of vital related mangrove and seagrass ecosystems. For example, overfishing of herbivorous fish can lead to high levels of algal growth that can suffocate coral. DESTRUCTIVE FISHING METHODS. Deep-sea coral reefs face challenges as changes to ocean chemistry, triggered by climate change, causing their foundations to become brittle. But it also depends on the combined impact of warming and acidification on previously deposited calcium carbonate frameworks. Species, like the Acanthaster planci, that, due to human activity, have been moved, intentionally or unintentionally, to areas where they do not naturally exist are called “invasive species“. According to the report, left unchecked, combined local and global pressures will push 90 percent of coral reefs to threatened status (all non-blue colors) in less than 20 years (by 2030) and nearly all reefs will be threatened by 2050. Comprehension Questions. Human being's actions such as pollution, destructive fishing practices, and coral mining all hurt the coral reefs. POLLUTION. A new study shows the coastal protection coral reefs currently provide will start eroding by the end of the century, as the world continues to warm and the oceans acidify. When unregulated, the pressures of tourism can cause damage to the surrounding environment: careless divers, badly placed boat anchors, hotels discharging untreated wastewater (polluting the water, creating sedimentation, while encouraging the growth of algae that compete with corals). Set on the beautiful beaches of Hawaii, “Reefs at Risk” explores the harmful effects some sunscreen chemicals have on coral reefs, marine life and people. Tourism generates large amounts of income for host countries. Fishing with dynamite and cyanide makes the fish easier to catch. The coral reefs of Indonesia and the Philippines provide annual economic benefits estimated at US$1.6 billion and US$1.1 billion per year, respectively. In the dried ornamental trade business, coral is collected and traded for souvenirs and jewelry and often sold to tourists and exporters. The coral reefs, an ecosystem at risk While coral reefs are home to the world’s greatest marine biodiversity, they are now threatened by climate change and human activity.The fishing and the tourism industries, coastal protection…Today, more than 500 million people rely on the services that they provide.

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