1. There are multiple reasons why coral reefs are dying, most of these reasons are either directly or indirectly related to human activities. Indirectly, pollution released into the water leads to greater algae growth, depriving them of the light that they need to survive. In a similar way, increased construction and mining leads to land erosion, and causes sediments to eventually enter the coral reefs, where it blocks light. Finally, the increased greenhouse gas emissions in recent years have raised global temperatures. Coral reefs can only survive in relatively cooler waters, and a common sign found in corals that have died from increased water temperatures is known as "bleaching" where the algae that gave the corals color have left. Humans …show more content…
As cruises become more popular among the general public, and cruise ships continue to grow larger, they will release more pollution into the oceans. In one week, a 3000-person cruise ship will release around 150,000 gallons of sewage, oftentimes poorly treated, directly into the ocean. This contamination harms both marine and human life, with components of this sewage including bacteria, heavy metals, and pharmaceuticals. One example of an effect this can cause is an algal bloom, where the nitrogen-rich sewage leads to a rapid increase of the population of algae. This drastically reduces the oxygen concentration of the water, leading to the death of marine life. Another form of pollution that cruise ships release is through the exhaust gas, with compounds such as carbon dioxide, sulfur dioxide and nitrogen oxides. These compounds contribute to global warming and acid rain, which can harm life both on land and at sea. Overall, individual cruise ships already release a significant amount of pollution to the ocean, and as cruise lines grow larger, even more pollution will be released in the coming years. Cruise lines need to improve their filtering mechanisms for sewage, and reduce exhaust emissions to ensure that they do not degrade the oceans any …show more content…
The growing demand for automobiles in India and Asia will only continue to increase in the coming years, as the world becomes more modernized, and standards of living rise. Already, cars in Asian cities have caused heavy air pollution, with contaminants like particulate matter, acid rain components, and carbon monoxide. These cars will need to be powered by gasoline, which involves the many different climate effects caused by the petrochemical industry, including oil spills and even more greenhouse gas emissions. Finally, the materials required to build these cars will lead to climate effects, in the form of heavy metal leakage and contamination from the mining required to produce the metals. Overall, the increase in cars in Asia will further degrade all the systems on Earth, and have an extreme negative impact on the
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
Bleaching is when the ocean water become too warm, “corals will expel the algae (zooxanthellae) living in their tissues causing the coral to turn completely white. This is called coral bleaching. When a coral bleaches, it is not dead. Corals can survive a bleaching event, but they are under more stress and are subject to mortality.” (Cave and Gillis). When a coral bleaches, it is more of like a self defense mode, which makes it turn white. The coral loses its food source as well. The downfall of this is that without the cooler waters, the corals could die of starvation or disease. Cooler waters from below can help a bleached coral bounce back to its natural state. However, if the water stays too warm for an extended period of time, “the corals don't just bleach, they cook and they die very quickly,.” (Westcott). Throughout time, much of the corals near Cairns and northward have lost the most corals. Hughes states that, “near Cairns, the Great Barrier Reef has lost 47 percent to 83 percent of their coral and as you go northward, the Great Barrier Reef has lost 11percent to 35 percent of its corals.” (Cave and Gillis). In another report, “a study last year found the largest die off of corals ever recorded with about 67 per cent of shallow water coral found dead in a survey of a 700km stretch.” (Johnston). In 2016 and 2017, there were back to back bleaching events. According to CNN reports, “back to back bleaching events in 2016 and 2017 have devastated a 1,500 km (900 miles) stretch of the UNESCO World Heritage Site.” (Westcott). Before the 2016 bleaching event of the Great Barrier Reef, there have only been two bleaching events, 1998 and 2002. According the Hughes, “only 9 percent of the reef has avoided bleaching since 1998.” (Cave and Gillis). That means that over 90 percent of the Great Barrier Reef has been affected by coral bleaching at least once in the past 19 years.
Coral bleaching happens when there is a decrease of zooxanthellae involved in the symbiotic relationship with their coral host. This also causes a loss of the coral's beautiful colors that sometimes can be seen to human eye. Bleaching leads to death of coral over time. Some causes of bleaching have been tied to salinity of the ocean and sedimentation. The main reasons known to cause severe coral bleaching are climate change and radiation. These two elements are extremely harmful to coral especially when they’re working together at the same time (Fitt et al. 2001).
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.
The Effects of Global Warming on the Great Barrier Reef Introduction Coral reefs around the world are in danger. One of the causes is global warming, which has been increasing the temperature of the ocean water, resulting in coral bleaching. This essay will focus on damage occurring to the Great Barrier Reef. What is a Coral Reef? A coral reef is a ridge formed in shallow ocean water by accumulated calcium-containing exoskeletons of coral animals, certain red algae, and mollusks.
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).
Automobiles play a major role in today's society. Almost every American owns at least one motorized transportation vehicle. Some say they make our lives better by reaching places faster than before. Others say they are a harmful to the environment. Have they made our society better or worse? They may be fast, but do we as humans want our environment to suffer because of time. Face it, cars pollute. And they release destructive chemicals into the air. Air pollution can threaten the health of many subjects in the environment including human beings.
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
This website gives a large historical overlook and possible conclusion to the issue of coral reef bleaching. Since the 1980’s episodes of coral reef bleaching and death have occurred almost every year in one or more of the world's tropical or subtropical seas. Bleaching happens in episodes, with the most severe typically accompanying coupled ocean–atmosphere phenomena. Bleaching episodes have resulted in loss of coral
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).
Almost all car makers around the world are responding to this issue and have begin their research to reduce the risk of climate change. The steps that the car manufacturers have to take to deal with this situation are to reduce the amount of CO2 emissions and waste produced by both of their manufacturing factories and vehicle by implementing new measures in their factories and by looking at using renewable fuels that produce cleaner emission.
Imagine that you’re driving on an open highway in the middle of summer. All you see in front of you is asphalt for miles and miles. The windows are down and your favorite song comes on the radio. You’re behind the wheel of a Tesla Model S, the newest electric car that can go from zero to sixty miles per hour in 2.4 seconds. This will soon be the future of all motor vehicles. Electric cars are beginning to have colossal impacts on our society because of their energy efficiency, performance benefits, and the fact that they are less harmful to the environment. In the near future, electric cars will dominate the road and eventually the planet’s overall need for oil will decrease immensely.
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
If the coral reefs were to become extinct, then future generations would not have the benefits that these animals have to offer, such as possible medicines, pest control, and carbon dioxide control. Fisheries are also contributed by corals and if they were eliminated would reduce the food source greatly. By not preserving corals, we are taking food directly out of our grandchildren's mouths. With the technology that is rapidly being discovered, we learn more and more about what we can do with bone structure and hard corals. Right now we are doing restructuring procedures and learning that bone tissue and blood vessels spread into the coral graft and eventually bone replaces most of the coral implant.
In this modern era, the level of pollution worldwide has been increasing consistently which in turn has brought harm to humans via many different ways. Consequently, the government must find a solution to solve this problem as speedily as possible. However, banning the ownership of private vehicles is not the only and definitely not the best way to decrease pollution. Although carbon emissions from vehicles do contribute towards a significant amount of pollution, banning the ownership of private vehicles in modern day society is unnecessary because pollution can also be caused by many other factors such as bad lifestyle choices on humanity’s part, lack of stricter or enforcement of environmental laws by governments as well as the fact that vehicles are an essential part of modern city life.