Coral Reef Bleaching Term Paper Example | Topics and Well Written Essays - 750 words

Coral Reef Bleaching - Term Paper Example Why/how Coral bleaching occurs Coral bleaching occurs because of the disintegration between corals and their symbionts or endosymbiosis (Symbiodinium spp) (Ainsworth et al., 2008). Most of the bleaching on corals occurs during the warm season. Established scientific evidence indicates that environmental stressors that include the increase of heat in sea surface temperatures tend to be the main cause of coral bleaching (Bourne et al., 2008). Moreover, high solar radiation tends to be a significant cause of large-scale bleaching (Bourne et al., 2008). Moreover, research indicates that seasonal bleaching also tends to occur because of an infection by the bacterium Vibrio shiloi (Bourne et al., 2008). Another established cause of coral bleaching is sea pollution that mostly occurs because of various human activities. For example, sunscreens that tend to promote viral infections play a significant role in causing coral bleaching especially in areas where there are high levels of human act ivities (Danovaro et al., 2008). Santavy eta al (2011) also indicates that various multiple chronic stressors play a significant role in the occurrence of bleaching. Ecological Impacts of Coral Bleaching Various impacts in the environment tend to emerge after coral bleaching events. One of these impacts includes massive threat to tropical coral-ecosystems (Anthony et al., 2009). Occurrence of bleaching results to lethal or sub-lethal stress on the reefs (Anthony et al., 2009). Moreover, coral bleaching results to loss of endosymbiotic algae or its associated pigment from the coral reefs (Ainsworth, et al., 2008). Bleaching also tends to cause changes in microbial communities. Bleaching also results to the reduction of coral reefs. This is because most of the reefs fail to cope with the harsh conditions and disease occurrences that emerge because of bleaching (Brandt & McManus, 2009). Another established significant impact of bleaching is that it reduces skeletal growth in corals (Ca rilli et al., 2009). Moreover, it is also necessary to consider that coral reefs provide the livelihood of most people within the tropics (Maynard et al., 2008). For example, some types of the corals are used for building purpose (Seneca et al., 2010). Corals also tend to be significant tourism attraction features hence increasing economic value within the tropics. Therefore, occurrences of bleaching are a major blow to various activities enacted by people within tropic areas. McWilliams et al., (2005) indicates that bleaching poses as one of the major threats of coral reefs because they end-up dying. Vivekanandan et al., (2009) indicates that corals tend to be the most diverse marine habitat and therefore bleaching affects the directly affects the living conditions of the estimated 0.5 million species that rely on the reefs. Possible solutions/treatments of coral bleaching There are minimal established ways in which treatment of coral bleaching can be performed. However, possible s olutions include laboratory studies that would assist determining the role of coral-associated communities and how they react during stressful environment conditions (Ainsworth et al., 2008). This may assist in coming-up with a reliable solution on how to minimize large population of corals being affected during warm sea seasons. Moreover, prevention of thermal stress in the future may contribute in prevention of

Risk Management Issues Essay Example | Topics and Well Written Essays - 3000 words

Risk Management Issues - Essay Example 54, 2009). One decision that appears from this scrutiny is the quantity of resources that the organization should have to provide cushion for potential failures that can take place during the way of its trading actions. In view of the fact that trading revenue is doubtful, despite the fact that, a significant risk management activity concentrates on the risk extent crisis - calculating how huge potential failures could be. Corresponding activities entail the examining as well as enforcement of risk-related trading restrictions, by this means helping the risk amended performance assessment of individual trading bureaus (Chapman & Ward, p. 42, 2003). These two phases of the risk management function turn the resources distribution decision into an optimisation issue: very small sum puts the firm in front of extreme levels of risk, although excessively huge sum increases financing expenditures as well as lessens productivity. The point of complexity with which the risk management role is carried out has progressed considerably during current years. Evidently, there are still significant issues whose answers would improve the task’s usefulness all the more. These issues come under three groups: (1) risk management functions, (2) risk forms, and (3) risk measurement execution concerns (Abkowitz, p. 76, 2008). The risk management issues put huge stress on attempting to get the â€Å"probability distribution† for the income of the entire company. Risk managers are particularly â€Å"interested in the extreme left-hand tail of this distribution as a predictor of the largest ex post loss that the firm could experience† (Olson & Wu, p. 65, 2007). After that, to offer assurance of firm-wide solvency, the organization would have resources more than that quantity. Then again, this whole quantity of resources should as well be distributed between the individual trading bureaus so that their job can be assessed on a risk-amended base. As a result of unsati sfactory correlations with bureaus’ revenue flows, the level of possible failures for the entire organization is not more than its total for the individual trading companies, forming the following procedural problem: if risk managers assess the company’s resources satisfactoriness condition initially and after that disaggregate the outcome for distribution to individual companies, they are susceptible to reserve misallocations between bureaus (Khan & Zsidisin, p. 89, 2011). The substitute of calculating capital prerequisites on the individual company level primarily and after that combining the outcomes with the help of a set of approximate correlations, alternatively, is prone to the possibility of overcapitalising the company altogether. Despite the fact that a lot of companies acknowledge the contradiction of depending on both approaches, the most excellent existing practice in the derived business supports the â€Å"bottom-up approach† (Smith & Merritt, p. 7 9, 2002), to a certain extent due to a custom of calculating the different sorts of risk (such as credit, marketplace, functioning) autonomously as well as being acquainted with the different comparative significance of these risk forms amid companies. The expansion of a incorporated tactic which conserved this point of specialisation devoid of giving up exactness on the universal level would be a considerable step ahead. Authoritarian organizations force funds prerequisites on