Oil And Oil : The Harmful Effects On 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 bleaching is normally characterized by the expulsion of the zooxanthellae algae, loss of algal pigmentation, or both. Coral bleaching events have had serious effects on corals and reefs worldwide. What is crucial to the understanding of zooxanthellae expulsion and bleaching is how the density of zooxanthellae within the coral is changing, if at all, under the prevailing range of environmental conditions (Gates and Edmunds, 1999). Over the last twenty years, there has been a dramatic increase in both the frequency and intensity of coral bleaching events. Sixty major bleaching events have been reported between 1960 and 1979, whereas only nine were reported prior to 1979 (Huppert and Stone, 1998). Given the dependence of the coral on this symbiotic algae, it is important to determine the cause of these bleaching events. According to Helvarg (2000, p.12):

Consisting of less than 1% of the world oceans, the coral reefs are ancient animals comprising of thin calcium carbonate deposits within the photic layer. Aside from its biologically diverse ecosystems, coral reefs are major source of food for millions and provides habitats and nursery areas for many marine organisms. Coral reefs also act as a physical buffer to protect the coastlines from tropical storms and erosion. In addition, many local communities rely on coral reefs to generate an income through activities such as fishing and diving. However, 75% of the coral reefs are under threat from induced impacts of humans and climate change (Burke, et al., 2011). This essay looks at the human impacts constantly being inflicted on coral reefs.

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

    Coral reef destruction is a big deal. There are many environmental threats on coral reefs which means they are slowly dying. Coral reefs play a very important part in marine ecosystems. Sea creatures depend on them for protection, camouflage, as a home, and also for food. Scientists believe this could be from natural causes like erosion, and global warming as reasons that coral reefs die off but one of the main reasons is pollution. There are many different ways pollution can affect coral reefs. There is a chemical in sunscreen called oxybenzone that may be contributing to the destruction of coral reefs as swimmers are trying to protect their skin. This chemical has toxic effects on young coral that can damage their DNA,

Located in tropical ocean waters, coral reefs provide priceless resources to both human and marine life. The leading natural cause of destruction among the coral reefs is global warming. Other natural causes are earthquakes, hurricanes, cyclones, and typhoons. The destruction to the coral reefs from these natural disasters is minimal compared to the dangers caused by man. Man-made destruction has a much wider impact on the health of the coral reefs. This destruction includes over-fishing, damage from anchors, aquarium industry, overgrowth of seaweed, and being smothered by sediments.

Out of all of these ways, oil spills can cause a noticeably excessive amount of damage to the ocean. Although only 12% of the oil entering the sea is caused by spills, they can deteriorate ocean life and environment more than any other pollution. One gallon of used oil spilled into the ocean, which contains toxic chemicals and heavy metals severely dangerous to the micro-organism at the base of the food chain, can cause an eight-acre layer

The oil spill created long term problems for the living organisms that inhabit the Gulf of Mexico. The oil covered the feathers of birds, making them unable to float at the surface. The oil killed some of the deep sea coral as far as seven miles away from the site. Mammals ingested the oil, which resulted in some of the mammals having internal bleeding and ulcers. This has also lead to an increase in sea turtles stranding, sick dolphins, and a decrease in population of many marine animals. This disaster stuck during the breeding season for many species of wildlife. “The oil’s toxicity may have hit egg and larval organisms immediately”, which could have wiping out those age classes. Population dips and cascading food web has occurred due to

The Deepwater Horizon oil spill caused eleven human deaths and approximately two hundred million gallons of oil to be leaked into the ocean over the course of eighty-seven days. In direct result with the oil spill, thousands of sea creatures, aquatic plants, and other sea-feeding animals began

The key environmental points are that coral reefs provide important ecosystem goods and services for the maritime tropical and subtropical nations. Within the past two centuries, the main drivers of massive acceleration in the decrease of coral reef species that have caused widespread changes in reef ecosystems has been due to the direct and indirect effects of overfishing and pollution during agriculture and land development. Since markets for fish have gone global, along with other natural resources, reduced stocks of herbivorous fish and the nutrients from land-based activities have caused corals to be replaced with fleshy seaweed.

Increased shipping increases the risk of tankers running aground on coral, spilling oil onto the reef.

The Effects of the Deepwater Horizon Oil Spill of 2010 on the Gulf of Mexico and Its Surrounding Communities

The Macondo Blowout occurred on April 20, 2010 and caused over four million barrels of crude oil, hydrocarbons, to spill into the Gulf of Mexico (Peterson et al.). This event is also known as the Deepwater Horizon oil spill. Subsequently, hydrocarbon plumes formed from the oil spill and with the natural water plumes that feed many corals, causing concern for coral communities from many researchers, so investigations were made to inquire about the health of coral communities nearby (Fisher et al. 796). Results showed that over half of coral communities within twenty kilometers of the explosion site displayed signs of harm (Fisher et al. 297). The effects of Deepwater Horizon oil spill were displayed in the coral population near the Macondo

In Santa Barbara, California, in 1969, even though the spilled oil was not even very large, thousands of dolphins, seals, and birds were killed (Ivanovich, and Hays, 2008). Moreover, in the Gulf of Mexico, 82,000 birds, roughly 6,165 sea turtles, approximately 25,900 marine mammals, and indefinite amount of oysters, fishes, corals, and crabs have been harmed or killed by the spilled oil. Additionally, the spilled has killed many aquatic plants. ( A Center for Biological Diversity Report, 2008). As a result, vegetation, which are the most essential part of the ecological pyramid, and other animals will be affected negatively by the dangerous impact of the spilled oil, which probably is going to cause some problems in the ecological pyramid. In fact, any defect in the ecological pyramid may become a dreadful problem that occurs an ecological

Oil spills can impact the environment greatly. Since the oil boats are on the ocean if the break and start to leak it goes into the ocean where it can harm the ocean and those that make their home in it. “That spill caused an immediate and significant impact to the ecosystem, with sightings of birds and turtles washed up on beaches covered with oil, as well as an increase in the deaths of other marine life” (Sinclair, 2017). The oil spill in 2010 in the Gulf of Mexico was the biggest since Deepwater Horizon. It caused harm to the ecosystem around it because technology came in so it could pump oil out of the ground under the ocean. There is no way to know the impact that oil spill and really every oil spill has had on the marine ecosystem.