How Long Is Coral Bleaching Of Coral Reefs?

Corals build colonies that secrete calcium carbonate to form ocean reefs. When they're healthy, coral reefs provide shelter and food for animals all along the food chain, including the top: us. Across the planet, half a billion people rely, directly and indirectly, on corals for their living. That's why what happens to the 9,000-year-old Great Barrier Reef, as well as to other reefs worldwide, is critical. The floods in Queensland have hurt the Great Barrier Reef by funnelling into the ocean vast plumes of freshwater and agricultural runoff that could severely damage the coral. Besides the extreme rain that sparked the floods, rising ocean temperatures, changes to the ocean's chemistry and the global trade in natural resources — all symptoms of our fossil-fuel economy — are waging a multiform war on the marine

Coral reefs not only protect coastlines and beaches from wave damage and erosion, but also are the basis for the fishing and tourism industries. Dying reefs is a worldwide problem, and evidence shows that 10% of the entire world’s coral has died, and 60% will die by 2020 if existing conditions continue (NOAA 2000). The reason that the Australian Great Barrier Reef is so important is because not only is it the largest barrier reef in the world, but it is also one of the most evolved models of how to best manage and protect the world’s largest reef system (Ornitz 1996). It extends for 2,340 kilometers (km), covers 345,000 square km and contains 2,900 reefs, 300 coral cays and 600 continental islands (White 1999). Historically, it has been ahead of the rest of the world in terms of recognizing and addressing problems associated with reef degradation.

Coral Reefs ecosystems only covered two tracks up to the 1970-80’s and they were biological and geological. From those years, we have been able to study and learn more about coral reefs. We have found that these reefs exist and a continued form such as none reef-building coral ecosystems can have fast structures being built. There is still quite a bit of things we will need to learn such as determining if coral communities are dependent on the abilities of reef building. They are used for structure and providing space to the ecosystem of the reef itself, having biodiversity, and to support the reef in all capabilities. Coral reefs are one of the most distinguish ecosystem in the world, but these are getting threatened by ocean acidification.

They protect against coastal flooding, wave damage, storm surges, wave damage, and also they provide homes for lots of fish.. Coral reefs are dying because of the increase in ocean acidification that is caused by the increase of CO2 in the atmosphere. Coral reefs may stop growing if the CO2 concentration levels are high which is expected over the coming decades according to the article. Coral reefs are also vital for people and business. In the article it was reported that more than 30 million small-scale fisherman and women depend on coral reefs for their livelihoods, specifically in Indonesia where fish supported by the reefs provide the primary source of protein.

"Coral reefs… are fragile structures living within a narrow range of temperature, clarity, salinity and chemistry. Even a slight increase in ocean temperature, or increased CO2… can cause stresses such as bleaching… These stresses slow the rate of growth of the corrals… With some 60 percent of the world’s coral reefs now losing productivity, it’s becoming a global crisis and a scientific mystery."

Coral bleaching usually occurs when the surface of a sea with coral in it becomes too warm for the coral. When the water heats to as little as one degree higher than normal, coral expels the algae living in its tissue, which causes it to turn completely white. The rise in temperature of the sea surface has been linked mainly to global warming. Other causes of coral bleaching include oxygen starvation caused by an increase in zooplankton, increased solar irradiance, increased sedimentation, bacterial infections, changes in salinity, herbicides, low tide and exposure, cyanide fishing and elevated sea levels. Bleaching events in 2016 were unprecedented, nearly 90% of the coral in the Great

First, I am going to talk about the importance of coral reefs. Coral reefs are some of the most diverse and valuable ecosystems on Earth. They are home to 4,000 species of fish, 800 species of hard coral, and hundreds of other species. Scientists believe that there are another 1 to 8 million unidentified species (NOAA). According to the National Oceanic and Atmospheric Administration, new drugs are being developed from

Irreversible destruction is occurring to our coral reef system. The majority of this destruction is caused by the human race. It is important that the people of the world come together to determine how to keep our precious resources in tact for future generations.

Worldwide we are facing an epidemic of large-scale Coral Reefs bleaching themselves white. Although white coral is not dead it is likely to die shortly after bleaching. The main problem is global warming, this causes overfishing, pollution and rising ocean temperatures with more acidity. Global warming is an issue that affects our planet, especially in the ocean. This problem has also an economic and political impact because "If the reefs vanished, experts say, hunger, poverty and political instability could ensue."

The article, Warming Bleaches Two-Thirds of Great Barrier Reef , talks about how Coral reef ecosystems around the world are threatened by human and climate change. The waters of the ocean are raising due to global warming, in turn

Finally, there are millions of species who live in the coral reef. It is used both for shelter and for a food supply. There is a vast amount of trawlers that come through each year to dredge the ocean. But think about what would happen if the coral reefs disappear. All the species that depend on the reef for shelter would die. And all the species who hunt for food there would also die. Dredging the ocean rips apart the coral reefs wether that was meant to happen or not. If the natural beauty of the reefs and the security it brings to animals dissapeared, it would be a major

The bleaching of coral reefs is when warm water forces algae to leave the reef. Once the algae disappear, the coral goes from a vibrant color to a pale white. As one marine biologist said, “You go from a vibrant, three-dimensional structure teeming with life, teeming with color, to a flat pavement...” This bleaching makes the coral more vulnerable to diseases and a greater risk of death. The biggest bleaching events to have occurred in

These increasing ocean temperatures, which result in global warming, are mostly due to the amount of CO2 released in the air, therefore threatening the existence of the coral reef systems (Cole, Pratchett and Jones). The reduction of the coral reef ecosystems are attributed to the climate induced bleaching from the past decade. The loss of coral reef environments has direct affects to the habitat of an organism within the reefs (Cole, Pratchett and Jones), leading to a decrease in biodiversity (Coker, Pratchett and Munday).

The Great Barrier Reef in Australia is experiencing bleaching. According to France-Presse, bleaching of a reef is “coral...that has been stressed by the heat” (France-Presse). When a coral has been “stressed by heat,” (France-Presse) the coral discards the algae that lives within itself which causes the coral to be more susceptible to disease. It can take up to several decades for a coral to recover from bleaching. Because of that fact that most coral does not have enough time to recover, it dies.

Coral bleaching occurs when the microscopic plants (zooxanthellae) are expelled by rising ocean temperature. When there are no microscopic plants such as zooxanthellae, the coral turns white and die. The studies show that throughout the worlds ocean, from the Florida Keys to the Great Barrier Reef of the Australia have been evidence of unique coral bleaching caused by the rising of ocean temperature. In the early 1980s the coral bleaching event has increased because of rapid increase of sea water temperature. Esther et al., investigates growth of Oculina patagonica at multiple environmental conditions in the western Mediterranean Sea. The Oculina patagonia is stony coral specie which is found mostly in the Gulf of Mexico and Caribbean. The coral was basically Atlantic origin which was transferred to Mediterranean Sea.