Human impact on coral reefs

Human impact on coral reefs Human Impact On Coral Reefs In The Last 30 Years Abstract Coral reefs are the homes that provide shelter for approximately one quarter of all known marine species as well as being the most diverse ecosystems. Coral reefs are vulnerable to even the slightest environmental changes. A review of the literature of the last 30 years shows that the frequency of human activity has intensified to a new level where human actions have extended to the coral reefs on a global scale. Humans are actively damaging the coral reef ecosystems on our earth. Coral reefs are overfished, poisoned by chemical pollution, smothered by sediment, and choked by macroalgae growing on nutrient rich sewage and fertilizer runoff. In the meantime, global warming and ocean acidification is a greater contribution to coral reef mortality. The main driving force behind the coral crisis is the continuing increase in human population. These will give a burden to environment, and eventually will impact on marine life, especially the coral reefs. Through the review of the past pape rs, I found that from the least and latest topic of ocean acidification to the largest one (sedimentation and nutrient enrichment), scientists are getting concerned about the problem relate to carbon dioxide which results in climate change and ocean acidification globally, especially in the recent years. Lots of coral reef scientists have risen to this key issue. Introduction â€Å"Coral reefs are evaluated to cover 284,300 square kilometers, with the Indo-Pacific region (including the Red Sea, Indian Ocean, Southeast Asia and the Pacific) accounting for 91.9% of the total. Southeast Asia accounts for 32.3% of that figure, while the Pacific including Australia accounts for 40.8%. Atlantic and Caribbean coral reefs only account for 7.6% of world total†. (Spalding, M., Ravilious, C., and Green, E. (2001). World Atlas of Coral Reefs. Berkeley, CA: University of California Press and UNEP/WCMC) It is reported that Australia, Indonesia, Philippines, Papua New Guinea, Fiji contain almost over half of the worlds reefs. It is now generally acknowledged that coral reefs are among the most threatened global ecosystems, and among the most vital (Costanza et al. 1997; Bryant et al. 1998; Boesch et al. 2000; Reaser et al. 2000; Wilkinson 2000). However, one of the upcoming crises is a major threat of death of corals and large scale damage of coral reefs in all over the world. This crisis is partly a result of the frequency of human activities which are having a negative effect on marine ecosystems, especially on coral reef ecosystems. A study from 1998 showed that coral reefs around the world were affected by human activities (Lauretta B. et al. 1998, Fig. 2). The study showed the relative proportion of reefs at risk in five regions, with Southeast Asia having the highest area at risk. This phenomenon probably is related to the overfishing in this area which leads to coral reefs being at the highest risk compared to the rest of the world. It is known that the current situation is directly or indirectly consistent with human activities. However, the question remains that to what extent has human activity changed the coral reef ecosystems? So in this report, I would use ISI web database to search articles related to coral reefs crisis. Basically, I will try to answer this question. To do this I will discuss the various threats to coral reef, including overfishing and fish live trade issue, pollution-including terrestrial runoff, chemical compounds and sedimentation, and macroalgae overgrowth which is causing by nutr ient enrichment under the seawater, and global warming and ocean acidification which contribute to coral disease and coral mortality. Impacts Of Overfishing It is sure about that overfishing in general is a damaging problem to many coral reefs around the world. In this field, it is shown that scientists did research in the topic of overfishing and fish trade was increasing since 1990. (Figure 3) In recent years, as a result of human interference on coral reefs, coral mortality is higher than ever before. When this occurs, the algae immediately take this opportunity for growth, which results in seedlings of coral not being able to attach to the reef. This type of event highlights the important role of herbivorous fish on the restoration of coral reefs. But if herbivorous coral reef fish are captured in large numbers, ethnic groups are difficult to recover. In this situation, macroalgae continues to overgrow, and inhibits the growth of corals. For example, The Caribbean region has been hit particularly hard, with 40% of absolute coral cover lost since the late 1970s due to overfishing and macroalgae overgrowth (Gardner et al. 2003). So some authors argue that overfishing is an important reason why reef corals have declined in recent years. (Aronson et al. 2006) However, overfishing has also been due to the improvement of global fishing technology, and a variety of advanced equipment is used in the exploitation of fishing. A large number of fish becomes extinct annually. As a result of advanced fishing technology, the worlds annual catch of fish is continuing to rise. Indeed, on one hand, increased fishing will provide sufficient global supply of fish products. However, at the same time, the increase in fisheries production will reduce the global average price of fish in the global market, and this decline will lead to the reduction of fishing profits, which in turn will drive an increase in catches again, ultimately leading to a vicious circle in fisheries. On the other hand, large scale fishing can lead to the sharp decline in fish population. Without predators, algae can overgrow and suppress coral recruitment. Even though, some scientists argue that these algae are not directly killing corals. In fact, they are competing with corals in t he space and intake of light. So without light, corals will die eventually due to corals can not get nutrients to survive. (Figure 4) Pollution A major threat besides the overexploitation of fishery resources is undoubtedly the strong increase in coastal development, and discharge of untreated sewage into the near-shore waters, resulting in enormous amounts of nutrients spreading into the sea and coastal zones (Burke et al., 2002; Wilkinson, 2002; Brown et al., 2006; UNEP, 2006). For example, around 60% of the wastewater discharged into the Caspian Sea is untreated, in Latin America and the Caribbean the figure is close to 80%, and in large parts of Africa and the Indo-Pacific the proportion is as high as 80-90% (UNEP, 2006). Agricultural run-off to the ocean, Nitrogen exports to the marine environment is projected to increase at least 14% globally by 2030 (UNEP, 2006). During the past 30 years, more and more scientists were on to the problems of sedimentation and nutrient enrichment and chemical pollution and oil spills. It is shown that a big number of topics on pollution and nutrient enrichment and so on. (Figure 5 and 6) Basically, the scientists wanted to understand how did sedimentation and nutrient enrichment and chemical pollution and oil spills impact on the corals? There are various mechanisms by which these factors can harm coral reefs. First of all, suspended sediment makes water turbid which allows less sunlight to penetrate the water. With less sunlight, zooxanthellae which live within the corals tissue can not photosynthesize to produce organic nutrients that support the corals to thrive. In addition, it is known that zooxanthellae are sensitive to chemical changes (Parker et al. 2008). In industrial wastewater and farming runoff, there are always chemical compounds which can make zooxanthellae toxic to corals as well as in the case of oil spills. So to protect themselves, corals have to eject the zooxanthellae (Parker et al. 2008). After a period in this situation, corals will die. Furthermore, farming near the coast results in large quantities of sediment and soil going into sea and onto coral reefs. This dirt, silt or sand can make water muddy, smothering the corals (Rogers 1990). In addition, the use of fertilizers for farming is another problem resulting in increased nutrient flow into the ocean. The discharge human sewage leads to the nutrient enrichment in certain areas, especially in the estuary, which may result in rapid growth of algae which as mentioned before they will outcompete corals, cutting off the supply of light as well. Ocean Acidification In this area, it is shown that more and more conservationists were interesting in ocean acidification in recent years (Figure 7). It seems a very new field that scientists have only focused on just 7 years ago. It might be scientists aware of the issue of acidification rising, which is now noticing that acid level rising makes an impact on coral reefs. Ocean acidification is related to the carbon dioxide being released in to the atmosphere and reacting with seawater. The concentration of carbon dioxide in the Earths atmosphere now exceeds 380 ppm, which is more than 80 ppm above the maximum values of the past 740,000 years (Petit et al. 1999; EPICA community members, Nature. 2004). Carbon dioxide reacts with water to form a weak acid H2CO3, which results in acid levels increasing in the oceans of the world. Ocean acidification is a current key problem that all marine animals have to face, especially coral reefs. As previous mentioned that corals get organic nutrients from a mutualistic symbiont zooxanthellae to grow. These algae are sensitive to acid rising in the seawater. If the environmental conditions are changing, corals will eject algae and turn to white, a phenomenon known as coral bleaching. Global Warming With respect to global warming, corals are sensitive to the sudden temperature changing as well, which means the change of temperature is a factor causes their photosynthetic process to break down. When this happens, zooxanthellae become toxic to corals. Then, if they want to protect themselves, the corals have to expel the zooxanthellae. And they will get starved and become bleaching. As is figure 8 shown that another very important threat affecting coral reefs is global warming. The rise in temperature can result coral bleaching. It is usual to see coral bleaching just temperature a little higher than hottest summer temperature (Parker et al. 2008). Large-scale bleaching events seem to be becoming increasingly common (Wellington et al. 2001). If temperature continues to increase, in the future, this means that coral bleaching events may increase their frequency an extent of severity. Even though populations adapt and corals do survive, this pressure increases their susceptibility to disease and reduces their ability to reproduce. Overall From 11393 articles found in the literature search on the topics of coral reefs, one eighth of papers are related to the impact of human activities on coral reefs (Figure 9 and Figure 10). Of course, there should be more factors impacting on coral reefs and have contributed to their mortality. Indeed, the coral reef crisis in all over the world is getting worse and worse, even in the future the coral reef would face further threats. But this does not mean we have no ideas to save them, the figure 11 also shows that marine biologists were concerned about the coral reef crisis more than before, larger possibly because more and more scientists were aware of the importance of coral reefs to the entire marine ecosystems. Protecting coral reef ecosystems probably is an effective pathway to get most species recovered. Conclusion During the past 30 years, marine ecosystems took place some changes. The interference of human activities directly or indirectly gives more and more burden for our earth. The damaged environment makes some species become threatened species or endangered species, even critical endangered species. Even though, coral reefs are not becoming extinct, they are facing high risk which leads them to die. Indeed, the world lost a large scale of coral reefs which all due to the humans since early 20th century. From the review of the literature of the past 3 decades, scientists are focusing now more on climate changes, including global warming and ocean acidification, which results in corals death. Compared to the previous large number and key issues, like fishing and pollution problems, scientists are beginning to find more new factors that influence the coral reefs. From this trend, we can see that there should be more work to do to find a solution to marine scientists. With the population con tinuing to rise, it is difficult to imagine what will happen in the near future. For the humans, perhaps, they have to think about what they can and should do to reduce the dead of corals and the damage of coral reefs. To find a solution to solve the coral reef issues, humans have to give more actively motivations and passions to change the current situations.

History of Ian Fleming Essay -- Ian Fleming James Bond Essays

History of Ian Fleming Ian Fleming not just created the character of James Bond; he personified him by living an exciting life. With his suave style and long history of lavished background he was almost born into the part of his later creation. Ian Fleming was born on May 8th, 1908 to his father, Valentine Fleming, and his mother, Beatrice Fleming (Lycett 12). He was the grandson of the famous Scottish banking pioneer, Robert Fleming (Rosenberg 5). Ian also had three brothers named Peter, Richard, and Michael. He hated his brother Peter during most of his childhood. This was due to his brother being very successful in academics and got his fathers attention. Fist fights usually broke out between the two of them (Lycett 15). He loved his mother, but he was always rebelling against her because, he didn't like the thought of her controlling his life (Lycett 28). Ian's father did seem more like a teacher than a father him. He always encouraged Ian to take part in sports such as track. The father even taught him golf (Rosenberg 8). Since his father and his brother were very successful, Ian felt a desire to become successful himself. Ian attended Eton High School and joined the track team there and became and outstanding athlete (Cork 1). But, his stay at Eton was short lived due to some trouble he was in that involved women and a motor vehicle accident (Rosenberg 20). Apparently, Fleming stole his father's vehicle and went to a party where he drank a lot and met women that he later invited to ride with him. One of the women distracted Fleming and he ran into a tree (Lycett 31). During the expulsion of high school, Ian's father died in World War 1 during a battle in France on Sunday 20 May 1917 (. All the inherited money went to Ian's mother. With the stipulation that she would remarry, Ian was pressured into getting money of his own. The widowed mother put him in another school called Tennerhof High School. It was there that he started to gain girlfriends and have an expensive taste of food and automobiles. People who went to Tennerhof with Ian remembered him as being very arrogant and difficult. There were other's that swear he was found to be charming, handsome, witty, and a lively aristocrat. But, Ian was having problems academically. Ian's mother knew a married couple that could help Ian. So he would visit them one day a week... ...n making the book into a movie. They approached Ian with a proposition to make "Dr. No" into a movie. If the movie did well they would produce other "Bond" movies. During the negotiations and production of "Dr. No" Ian completed "Goldfinger", "For Your Eyes Only", "Octa*censored*", and "The Spy Who Loved Me". The movie, "Dr. No" was a huge hit and Ian had the feeling that he finally reached the success that he hoped to achieve over his father and brother. Other movies were made while Ian Fleming continued to write. That is until 1964 when Ian Fleming died of a fatal heart attack while at Royal St. Georges Golf Club. Ian Fleming was a man of many visions, and talents. It wasn't until after his death that James Bond was a British, sexual, and heroic icon. A total of 20 "Bond Films" have been made so far. Even more James Bond books have been written. Ian Fleming will live on with infamy and legend. Work Cited Bruce A. Rosenberg "Ian Fleming". Boston: United Publishing, 1981 Andrew Lycett "Ian Fleming: The Man Behind James Bond" Kansas City: Universal Press, 1995 John Cork "The Life of Ian Fleming (1908-1964)" http://www.mcs.net/idust/www/flem-bio.html

Neglect of the Elderly Essay

The neglect of the elderly is an extremely important issue in today’s society. The United States especially seem to treat their senior citizens with a severe lack of respect. In most foreign countries, the elderly are treated with the utmost respect. They are looked upon as the wisest person in their family. In today’s society, it seems as if people are more concerned with their own lives than the lives of those who raised them. This is why something needs to be done. Elderly neglect is a severe problem; one that does not seem to be getting any better. So what do we do when our parents get to the age when they have difficulty taking care of themselves? It seems that the most popular solution is to put them in an adult care facility and let them be someone else’s problem. When babies are born, they cannot take care of themselves. Do parents send them to a baby care facility and let strangers take care of them? No, because that would be preposterous. We care for our children because they cannot are for themselves. Then why is it that when the elderly get to the point that they cannot take care of themselves, we send them off to be someone else’s burden? This makes absolutely no sense. We as their children should be the ones taking care of them. We can ensure that they get the care they need. We would treat them with love and respect, something that they will not get in a facility. Adult homes, senior citizen centers, and assisted living facilities are all businesses. They are controlled by money. When money is tight, so is the care given to the senior citizens. The financial restraints result in the seniors not getting the attention they so desperately need. Some seniors cannot use the restroom without assistance, which sometimes results in them having to sit in their own filth until someone can help them. Imagine not being able to use the restroom by yourself and no one will help you. You end up soiling yourself and you have to sit in your own disgust until the underpaid, overworked employee slopes into your room to unwillingly help clean you up. Is that how anyone should be treated? No, absolutely not. Adult care facilities also suffer from a high turnover rate, which breeds poor employees. These unqualified individuals hold the lives of our elderly in their hands. A prime example would be fast food employees. When you put an underdeveloped person in a high stress, low paying job, you are not going to get top notch service. You are going to find people with bad attitudes that give poor service. Over-stressed and under-qualified caregivers end up giving this same type of service. This issue also tends to lead to elderly abuse, which is another major issue. But why do these people abuse the elderly? Even more puzzling is why do family members abuse the elderly? It was stated that â€Å"most perpetrators of abuse are caregivers who have some history of mental illness or substance abuse, and who are economically dependent on the older adult that they are supposed to be caring for† (Garrett, 2013, para.3). Why do we as a society treat these seasoned individuals with such a lack of respect? I can only imagine that part of the problem is the frustration of the system in place at these businesses. The disgruntled workers take out their frustrations on the seniors. This lack of caring also results in the seniors not being fed properly, which can ultimately lead to severe medical conditions or death. The facilities are not the main problem. The main issue is that people have lost respect for one another. Everyone is so wrapped up in their own lives that they could care less about anyone else. Elderly neglect would improve if we as a society would recognize the importance of supporting and cherishing all things, old and new. Reference Garrett, M. (2013, April 27). Elder abuse. Psychology Today. Retrieved July 24, 2013, from http://www.psychologytoday.com/blog/iage/201304/elder-abuse

Transgenderin India - Gender Inequality Point Of View ..

TRANSGENDER IN INDIA - GENDER INEQUALITY POINT OF VIEW MR. ABILASH CHANDRAN Asst. Professor. Department of Social Work, Christ College (Autonomous) Irinjalakuda, Thrissur, Kerala, India. abilashmsw@gmail.com 9544214227 MS. KEERTHANA VIJAYAKUMAR Master of Social Work 3rd Semester, Department of Social Work, Christ College (Autonomous) Irinjalakuda, Thrissur, Kerala, India keerthanaviyyur@gmail.com 70250489 Paper abstract: Gender inequality perspectives of the third gender/ transgender in India is a study related to the gender inequality problems facing by third gender or transgender in India. The main objectives of this study is to project the inequalities faced by transgendes in Family, Education, relationship, social roles,†¦show more content†¦Their discrimination has been a perennial issue and has only proven to be more spurious with time. The discrimination the members of the transgender community face based on their class and gender make them one of the most disempowered groups in Indian Society. Transgender is generally described as a person whose gender identity, gender expression or behaviour does not conform to their biological sex. 2. DEFINING TRANSGENDER: Transgender a person whose self-identified gender does not correspond to the gender assigned to them at birth. Their gender identity may not conform to conventional binary notions of male and female, but rather as a third gender. The term transgender is not indicative of sexual orientation, hormonal makeup, physical anatomy, or how one is perceived in daily life. The term ‘transgender’ refers to signify individuals who go beyond rigid, binary gender constructions. Such resistance is facilitated through the breaking and blurring of culturally prevalent stereotypical gender roles. Third Genders are mostly castrated males who have a long history that dates back to 9th Century B.C. Transgender have a recorded history of more than 4,000 years. Asian countries have centuries-old histories of existence of gender-variant males who in the moderns times are labelled as transgender women . India has a history of people with