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Destruction of coral reefs
Coral reefs in danger essay
Preserving coral reefs in the wake of climate change and man-made interventions
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Literature Review:
A big change that has occurred in the oceans all over the world is the Coral Reefs are dying and are predicted to be dead by the end of the century due to the rising acidity of the oceans caused by many different threats to marine ecosystems. Coral reefs cover less than 0.2% of our oceans but they contain 25% of the world’s marine fish species according to Endangered: Biodiversity on the brink, 2010: pg.45). If this is the case that means by the time the end of the century comes around we will have lost close to 25% of the worlds marine ecosystems.
One explanation for dying coral reefs is increasing levels of carbon dioxide. As humans burn fossil fuels carbon dioxide builds up in the atmosphere. There is research showing that due to increased levels of carbon dioxide that the carbon dioxide has soaked into the ocean making the ocean more acidic and causing the reefs to die quicker (Endangered Oceans, 2009: pg. 70). When the ocean becomes more acidic it has more effects on the biodiversity within the ocean.
Another explanation for coral reefs dying is because of increasing in temperature. As the earth gets warmer due to global warming the oceans get warmer. According to research done by the International Union for Conservation of Nature because of global climate change coral bleaching takes effects on the coral reefs all over the world. This causes coral bleaching caused by these elevated sea surface temperatures. Status of Coral Reefs Around the World (pg. 21) says that the major threat to the coral reefs has been coral bleaching over the past decade. According to Green peace if the climate change is not stopped, coral bleaching will increase all over the world until it occurs annually by 2030-2070. This is ...
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...fer and grow too much algal. Both of these practices were developed around the 1950s. Both of these methods were practiced in the Great Barrier Reef until the early 2000s causing damage on a large amount of reefs within the Great Barrier Reef area. (Source)
Coral mining is a large issue that occurs in reef areas around the world. This is a practice of taking live corals to use to as bricks, road-fill, or cement for new buildings. Corals are also mined to sell as souvenirs to tourists and to exporters. A lot of mined coral ends up in the live rock trade which where miners take the live rock, in this case coral reef, and is sold for saltwater aquariums. (Source)
Costal areas are very popular areas to live within throughout the world. As costal development continues to develop quickly it poses threats to nearby coral reefs. Costal Development
d. Benefits Economically
A. Global Warming kills Great Barrier Reef coral. http://www.usyd.edu.au/su/exterel/news/981008News/8.10.coral.html. Coral bleaching http://www.uvi.edu/coral.reefer/bleach.htm Coral Reef http://encarta.msn.com/find/Concise.asp?z=1&pg=2&ti=050FE000 Coral reefs in peril worldwide. http://usatoday.com/life/science/environ/lse011.htm Coral'stress' worsening, expert says.
Believe it or not the current pop culture surrounding the reef is environmental protection. This mean that people are trying to protect and cleanse the reef of toxic waste and such. And the reason that comes to mind as to why they are protecting the reef is because they would want to preserve such a mythical place from the bottom of their
Earth, an endless source of wonder and beauty, produced the Great Barrier Reef. Hustling and bustling, the Reef thrives like a busy city, teeming with life. Sheltering thousands, corals, maintain the well-being of the Reef; however, the world threatens its nature and delicacy. Populations growing and technological advances increasing, the world becomes more and more disconnected with the natural world, posing an alarming risk for the planet we live on. Although many organizations try to keep the oceans clean, because of human interference and unnatural occurrences, the Great Barrier Reef needs scientific help to adapt corals to new conditions for means of survival, putting pressure on the Australian government to save their ocean environment.
This article discusses how important the organisms symbiotic with coral reefs are, as well as how important coral reefs are to our environment. Also explained is how natural and non natural things things like hurricanes and overfishing affects them. A study is quoted about how water acidity also plays a role in the bleaching of corals. Lastly, restoration and conservation efforts are discussed and how we could possibly help our oceans.
Coral Reefs are said to be the “tropical rainforest” of the sea. They are home to over 25% of all marine life (http://coralreefalliance.org.stories/storyReader$77). Over the past few decades they have been subjected to destructive anthropogenic practices. Some of the major threats to coral reefs include sedimentation, water pollution, harmful recreational activities, and global warming. All of these things cause stress on corals and can potentially cause mortality. Corals are made up of two parts, a polyp and zooxanthellae. A polyp is a calcerous body that grows from a hard part of the ocean floor. Zooxanthellae is a photosynthetic algae which lives in the polyp and provide energy for themselves and the coral. In many cases, corals undergo “bleaching,” which is a process where corals lose the zooxantheallae or chlorophyll pigment, and turn white (Wilkinson et all). After bleaching corals can survive for several months. It is possible for corals to recover by hosting more zooxantheallae, but it can take between 5 and 50 years for them to recover completely (Wilkinson et all, 1999).
Leading scientists advise climate change will cause increases to the frequency and intensity of extreme weather events. Rising sea levels pose a significant risk to coastal communities, while the world’s oceans could become too acidic to support coral reefs and other calcifying marine organisms. Coral reefs contain only six per cent of the area of the Great Barrier Reef, yet they provide critical habitat and food for numerous species in the ecosystem. However, climate change has already impacted coral reefs in the Great Barrier Reef as corals are very helpless against its potential impacts. Eight mass coral bleaching events has occurred since 1979, triggered by unusually high water temperatures. And because of this, zooxanthellae (photosynthetic algae) leave their tissues and corals will have no more colours hence ‘bleaching’. Without the zooxanthellae, the corals that remain gradually starve to death. Once the coral dies, fish and a multitude of other marine species are soon affected. Rising sea levels and more frequent and intense storm surges will see more erosion of Australia’s coastline, causing community and residential
Imagine a lush underwater place. Beautiful structures colorful animals and places that would never have been thought of before. In reality that's not what it really looks like, really the ocean is a desolate place that is barren like a desert. Many marine species have been lost by as much as 49%.(seeker) A big part of that reason is because of coral bleaching which causes as stated above a decline in species that depend on the coral as there home. Coral bleaching is a serious problem that could cause problems for everyone if we don’t fix it.
Another point explicitly stated in the film was that corals didn’t really have a life expectancy. However, because of climate change, they die early. It was discovered that some corals were turning white after six months which is definitely fatal to our planet because we may witness the eradication of an entire ecosystem in our lifespan as said by Doctor Ruth Gates. In addition to this, there is a big heat wave travelling near the planet which leaves dead corals in its trail and in 25 years, all of the world’s corals wouldn’t be able to keep up with this heat and they will all eventually
Now that corals have been briefly described we can see why the effects of climate change damage coral reef systems. Ocean acidification is one result of climate change. Acidification is caused by an increase of carbon dioxide in our oceans and leads to a decrease in the pH levels of seawaters. This pH decrease reduces the ability of corals to make their hard skeletons. Rates of coral calcification on the Great Barrier Reef and many other reef systems around the world have declined by 15-20% since 1990 due to increasing thermal stress (De’ath 2012). It has already been mentioned that the oceans are absorbing almost all of the excess heat from climate change. This effects coral reef systems in what is known as coral bleaching. The term bleaching refers to the loss of corals’ colors. A coral’s color is the result of the zooxanthellae present. When water becomes too warm the
The Australian Institute of Marine Science researchers recently reported coral diseases were responsible for coral death recorded on the Great Barrier Reef between 1995 and 2009. Coral diseases can cause the death of coral that has been weakened from bleaching or cyclones. These events are going to be more frequent due to the changing climate. (Great Barrier Reef Outlook Report)
The increase in ocean temperatures are causing the reef to die out; reefs structures don’t have the ability to keep up pace with the ever so changing climate 4. Rigel suggests that coral reefs will eventually die out from the erosion of the warm ocean4. The increase in climate change is leading to ocean acidification. Much of the gases that enter our air from pollution also dissolves into the ocean. With this occurring, corals cannot absorb the calcium they need to maintain their skeletons. The stony skeletons that support coral reefs will dissolve. If nothing is done to stop so much carbon dioxide from going into the atmosphere, this will increase and more and more coral reefs will be destroyed and die
Coral reefs are well known for their colorful array of marvelous sights including a parade of exotic flora and fauna. They are said to be the foundation for a quarter of marine species, and are a crucial support for human life as well. The coral reef ecosystem is a diverse collection of species (ranging from microscopic to larger-than-life in size) that interact with each other and their physical environment. If any piece of a coral reef is harmed or removed the entire community can be seriously affected, even to the point of collapse. Unfortunately, human impact has resulted in long-term stresses that, unlike the short-term stress of natural disasters, coral reefs are not as capable to recover from. “Approximately half of the world’s coral reef ecosystem resources are considered by scientists to be in 'poor' or 'fair' condition and have declined over time due to several anthropogenic threats” (“Status of Corals” par. 2). Through poorly administered commercial practices, carelessness and ignorance among the common people, and human aggravated natural processes coral reef destruction has become a serious issue afflicting the world’s biodiversity and it’s intricate biosphere mechanics (“Human Impact on the Great Barrier Reef” 1) (“What Are Coral Reefs?” 1).
Corals provide shelter for nearly one quarter of all known marine species. The reefs are home to over 4000 species of fish, 700 species of coral, and thousands of other forms of plant and animal life. Living coral reefs are the foundation of marine life, and this also means that they are essential for human life, but all over the world they are dead or dying because people are destroying them at a very fast rate. Already 10% have been lost, and there are predictions that 705 of all corals on the planet will be destroyed in 20 to 40 years unless people stop doing what they are doing now – i.e., pollution, sewage, erosion, cyanide fishing, bad tourism.
Concerns about coral reefs have only been raised within the last few years, going back to 2004. In the Home movie (which came out in 2009), they dressed that coral reefs were dying from all of the heating of our planet and the deadly pollutants in the air going into the water. The movie and many articles wrote by scientists have said that this damage made to the coral reefs might not be averted. Almost 20% of the world’s coral reefs have been destroyed and no immediate signs of recovery. On Earth’s surface, coral reefs take up 1% of the surface. In 1998, 16% of coral reefs were damaged by pollutants in the air. But in 2009, 40% of the 16% that were damaged in 1998 recovered fully or is recovering slowly. Those numbers were great at first,
Coral reefs need to be preserved for many reasons. In this paper, I will discuss a few of them. First of all, they house a collection of diverse organisms, and contribute to fisheries which provide food items such as fish, crustaceans, and mollusks. Furthermore, coral skeletons are being used as bone substitutes in reconstructive bone surgery and may be able to provide important medicine, including anti-cancer drugs and a compound that blocks ultra-violet rays, they even help reduce global warming by taking carbon dioxide out of the air. These reefs provide a habitat for many species.