Bleaching Away the Beauty of Coral Reefs

A case study that was carried out a few years ago states that since 2005, the caribbean region has lost 50 percent of its corals, mainly due to the effects caused by the increase of temperatures. From 1997 to 1998, mass bleaching is estimated to have caused severe effects to 16 percent of the world’s coral reefs. Even though signs of recovery have been seen in

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 found in shallow tropical waters along the shores of islands and continents. Coral bleaching is a topic that gets left in the dust. Not many people really pay attention or show much interest in it. Widespread bleaching, involving major coral reef regions and resulting in mass coral mortality has raised concerns about linkage of the events to global phenomenons including global warming or climate change and increased UV radiation from ozone depletion. Corals provide a lot not just for us humans but for marine life as well. Marine Biology provides information about how bleaching happens and how it affects the coral. Buchheims’ article is full of logos and a few pathos while the other source is full of ethos. In The Nature Conservancy’s director Stephanie Wear provides us with lots of professional opinions

"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."

The biodiversity is very high in coral reefs. A coral reef takes about one percent of the ocean, but it has around twentyfive percent marine life. This means a lot to the coral reefs because the more species can lead to better conditions. There are many different kinds of fish that may eat algae, which can protect the coral. Bigger fish or even sharks keep the population of smaller fish in good hands. Some fish can hurt the zooxanthellae. Then there are “cleaners” that eat up dead organisms and keep the reef look nice.

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

Coral reefs are threatened by global warming. They can only live in waters between 18 C and 30 C. Therefore, with the increase in temperature of the surrounding water, there has been an unprecedented increase in the number of coral bleaching events during the past 2 decades (which have had some of the warmest years in history). When ocean temperatures get too high, coral polyps lose the symbiotic algae inside them, causing them to turn white, or "bleach," and eventually die.

David Attenborough, a well-known naturalist, introduce us to our modern day “Darwin,” J.E.N. Veron, a former chief scientist whom is the world’s greatest scientific authorities on corals and coral reefs. Veron who has lived and worked on the Great Barrier Reef for most his life has discovered over 20 percent of the known coral species today. And today, he gives us an insight on why the earth’s reefs face a likely mass extinction within the lifespan of the younger generation. During his time as a scientist, he researched particularly on the diversity and evolution of the world’s corals and became aware of their troubles. He then began his studies on the analyses of previous reef extinctions and accrued more evidence of the effects of changing sea levels, temperature stresses, predation by crown of thorns starfish, and human influenced changes in nutrient levels. Veron had witnessed his first patch of coral bleaching off the Great Barrier Reef’s Palm Island in the early 1980s, a tiny clump of white skeleton. Everything started turning white and dies, it was the fast-growing branching corals, but some of the others were horrible to see. After witnessing the mass bleaching, the global damage confirmed a close connection with El Nino weather cycles. By being susceptible to increases in heat and light, corals were alerting scientists to climatic changes. When corals are exposed to temperatures two or three degrees hotter than their evolved maximum, along

The destruction of the coral has an impact on the tourism industry. Corals are the main attraction to national parks and if they are destroyed tourism will go down. Tourism is the one of the main things that give profit to the countries who use it as a source of revenue. In 2005-2006 the Great Barrier Reef had an income of 22.716 million dollars, which was less than what it had 2004-2005 by about 1.259 million dollars. If the coral reef becomes extinct, the money and jobs

Elevated sea temperatures are the primary cause of mass coral bleaching events. Bleaching is a stress replication of corals, during which they expel their zooxanthellae during unpropitious conditions, giving elevate to the typical white coloration observed. Aside from temperature, other stressors such as tropical cyclones, freshwater inflows and anthropogenic pollution can additionally induce bleaching but to a far lesser extent and generally not on immensely colossal spatial scales.

Coral bleaching is one of the visual effect of climate change. Caused by the stress put on the coral because of the temperature of the water becoming warmer. This major effect of climate change could lead to the death of the Coral. This has been especially noticed on the Great Barrier Reef. Only recently the earth has witnessed severe coral bleaching episodes all around the world.

Coral is the building block for a niche underwater ecosystem that consists of diverse sea life. These ecosystems are known as coral reefs and are named so due to the limestone (calcium carbonate) that is secreted by the coral lifeform. (Baker, Glynn and Riegal 2008) Coral reefs are host to such a diverse population of sea life, some of which may be endemic to the reef, that the destruction of them can cause large scale damage to populations. When under a lot of stress, the vibrant colours that are iconic to coral start to fade, thus the term coral bleaching. (Baker, Glynn and Riegal 2008) If the coral is left like this and its stressful conditions disappear it will eventually return to its vibrant colour, unfortunately if the stressor continues the coral will die. (Baker, Glynn and Riegal 2008) Reef building occurs over hundreds of years which makes the large scale coral bleaching all the more impactful on the underwater ecosystems. Bleaching events are so severe that an entire coral reef can die off from just 1 mass event. (Baker, Glynn and Riegal 2008)

The Great Barrier Reef is one of the seven natural wonders of the world, it is the largest reef system boosting exotic crystal-clear waters, vibrant coloured coral and an abundant variety of marine life. Bleaching of the coral ecosystem influenced by global warming and anthropogenic pollution is putting the reef in mortal danger and generating an environmental

Coral reefs are extremely diverse and important to sea life. They cover about 0.2% of the ocean floor yet more than 25% of the marine life finds itself home within the coral reefs. Not only do coral reefs provide shelter for sea life, they also protect shorelines from erosion. In this case, coral reefs do not just serve the ocean but they serve human life as well. Rainforests are number one when it comes to their diversity of animals and species, and coral reefs are second in diversity. Unfortunately, human life has a negative impact on coral reefs at times. Things like pollution and global warming are essentially wiping out coral reefs which is causing coral bleaching. Because they are so important to sea and human life it is necessary that

Coral reefs contain symbiotic algae called zooxanthellae which gives the coral its healthy brownish color. The algae "utilizes sunlight and the coral animal's respired CO2 to produce energy rich compounds that feed the coral host" (AIMS, 2003). When stress factors such as "heat, solar radiation, pollution, reduced salinity and changes in oxygenation" occur around the coral, bleaching can begin (Dennis). When bleaching occurs, the algae, which create nutrients for the coral to feed from, is released due to stresses to the reef. Thus the coral starves and its white calcium carbonate skeleton of the coral becomes visible (AIMS, 2003). But one of the main stresses that contributes to the lifeless white appearance of the coral is the warmer temperatures of the sea surface water.