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Essay on why humans are damaging the coral reef
Impact of human overfishing on coral reef ecosystems
Conclusion of human impact on corals
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Coral reefs are systems of large, underwater structures that are composed of the mineralized bodies of corals. These corals are a class of marine invertebrates known as Anthozoans, and belong to the phylum Cnidaria, and are thus related to sea anemone and jellyfish. Each individual coral animal is only a few millimeters in diameter, and a few centimeters in length. Due to their sessile nature, and their ability to reproduce asexually, they are able to construct, over many generations, massive colonies of genetically identical individuals. Additionally, they secrete a hard exoskeleton of calcium carbonate to support and protect their bodies, and it is from this process that the colony constructs what is known as a single coral “head.” The world’s coral reefs are quintessential to global biodiversity, so much so that they are often referred to as the "rainforests of the sea". Although their actual space occupied by reefs is relatively small, constituting less than 0.1% of the world's ocean surface, they support over 25% of all marine species on earth. They provide complex and varied marine habitats that support a wide range of other organisms including, but not limited to, fish, mollusks, worms, crustaceans, echinoderms, sponges, tunicates and other cnidarians. Some of these animals feed directly on the corals, while others graze on algae on the reef. The reef also provides a protective habitat for many of these animals. In addition to their tremendous ecological benefit, coral reefs are also economically beneficial to humans, as they provide considerable services in terms of tourism, fisheries, and coastline protection. Surveys to determine their total global economic value are imperfect, imprecise, and highly varied in thei... ... middle of paper ... ...of sodium cyanide is released into a target area in order to stun fish. This method of fishing is used mainly for the capture of aquarium fish, to be sold to wealthier countries, but it is also used for catching food fish. Hundreds of thousands of pounds of cyanide are released into the Pilipino reefs each year. As you can imagine, pumping large quantities of toxins into a fragile ecosystem has negative effects. Even low concentrations of cyanide inhibits photosynthesis in zooxanthellae, a genus of algae with which coral grows symbiotically. The death of the algae removes the major food source of the coral, causing bleaching and death. The cyanide also harms the coral directly, blocking the oxygen-transporting proteins, and preventing oxygen from reaching the cells, causing death. Blast fishing is just about as ludicrous, if not more so, in practice. It is a metho
The outer layer of a reef consists of living animals, or polyps, of coral. Single-celled algae called zooxanthellae live within the coral polyps, and a skeleton containing filamentous green algae surrounds them. The photosynthetic zooxanthellae and green algae transfer food energy directly to the coral polyps, while acquiring scarce nutrients from the coral. The numerous micro habitats of coral reefs and the high biological productivity support a great diversity of other life.
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).
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.
In absence of calcium carbonate, coral and shellfish can’t survive. The ecosystem of ocean depends on these organisms because they offer a large source of food at the bottom of the food chain. They need to be abundant in order t...
All over the world coral reefs play an important part in our environment. Not only are the reefs colorful and beautiful to look at but the coral reefs house several different types of fish and other sea creatures. Coral reefs have started to decline over the years due to “climate change, El Nino events, overfishing, pollution and other pressures” (Newnham 1). A healthy coral reef can also collapse due to a natural disaster (Newnham 2). There can be several different reasons why a coral reef has started to decline or has been destroyed.
Soft corals are grouped in the phylum Cnidaria, class Anthozoa, and order Alcyonacea. Their distinguishing characteristic is that their polyps always bear eight tentacles which are on both edges fringed by rows of pinnules (Fabricius and De’ath, 2002). The common name “soft coral” comes from the fact that they have no massive external skeleton as compared to the more commonly studied hard corals.
The corals use these products to make proteins, fats, and carbohydrates, and produce calcium carbonate. The calcium carbonate is what the coral uses to make its hard skeleton. The coral reefs of the world are of vast importance because they host 25% of all marine life on the planet.
Located in tropical ocean waters, coral reefs provide priceless resources to both human and marine life. They exist in an area about 30 degrees on either side of the equator. Coral reefs are home to more species than any other marine ecosystem. This includes over 1500 types of fish and 500 different types of algae. (Encarta) However, nearly 60% of coral reefs are in serious danger due to both natural and man-made causes.
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).
Coral reefs offer one of the most important aquatic biomes, making up only 1% of the ocean floor they provide shelter for about a quarter of marine life. In the past 40 years it has been observed that coral reefs have been declining due to pollution, global warming, sedimentation, overfishing, and pathogens. These stressors mainly increase CO2 concentrations, or ocean acidification, which lowers the calcification rate of corals. Increased ocean temperatures and excess CO2, leaves reefs prone to algae invasion and disease. However, restoration of these important habitats is possible, one of the greatest examples of ocean conservation happened on the east coast of Mexico’s Baja California Peninsula. Where
Corals the rainforests of the sea. Corals’ and rainforests are very important to the world because they have a very important function. Carbon dioxide dissolves in seawater, the carbon dioxide then forms a week acid called carbonic acid this acid in it called carbonic iron, which stays in the carbon carbonate. This acid cannot make limestone but dose dissolve in ready-formed limestone and the reefs need it to produce limestone. Rainforests give out oxygen. Corals are like rainforest in the sea with al the reefs and animals. Corals are also compared with cities because they are like cities the fish are like people and the corals are homes to the fish.
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.
In conclusion, I would like to say that before writing this paper, I had no idea how important coral reefs were to the earth. I have learned a lot and I think that if more people were informed about the positive capabilities of them, humans wouldn't be so careless about them.