Overfishing is serious problem in the world today, more than half of the world’s population depends on the oceans for their primary source of food. Harmful fishing methods are unnecessarily killing turtles, dolphins, and destroying critical habitats. Global warming is increasing the temperature of the ocean water, reducing the generation of the base of the food web, plankton. The reducing of the plankton generation is causing major marine ecosystem change. Pollution is also a significant environmental issue HAL is facing.
Corals under stress due to changes in PH levels or temperature of the water will expel the algae (zooxanthellae) living within their tissues causing the coral to turn completely white. This is called coral bleaching. Another cause of coral bleaching is produced formation water, an effluent of offshore oil and gas industries that cause significant bleaching ( White et al .2012) .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. Mortality amongst corals has appeared to be the breakdown of the symbiotic association between the zooxanthellae and the coral host.
The coastal margins are seen to be potential sources of hazardous trace elements, as the effluents are discharged into waterbodies and finally flushed out to the open ocean. About 17104 m3/day of effluents reach the Sea from various small and large scale industries situated along the southwest coast (Udayakumar et al., 2014). The symptoms are there to show considerable impact of deterioration of estuarine waters on the coastal ecosystem (Jayakumar et al., 2001). Hence, determining the level of metals in the coastal margins could provide a better understanding of possible sources, ecological risk, and transport
Ocean acidification leads to a reduction in the amount of carbonate ions in the water. Many marine animals essential carbonate ions for the calcium carbonate essential to form skeletons and shells. This will disturb their development and ability to reproduce – ultimately threatening their populations.. Falling numbers of less well-known species, like pteropods – tiny swimming snails – have important effects further up the food chain. Pteropods are important sources of nutrition for many types of fish, whales and birds in polar and sub-polar regions.
Examples of negative local practices are the usage of poison/explosives and overfishing. Overfishing as the name suggests, is fishing a certain fish to an excess amount, decimating the population. This could put multiple organisms’ populations at risk and populations may possibly go extinct. Another practice that negatively impacts the ocean is the usage of poison and explosives. Obviously, the poison that is used in fishing (mainly cyanide) is harmful for the ocean because it may poison other fish over the years.
Overfishing is certainly an environmental issue because it affects the planets ecosystem due to human interference. One example of this is when a marine species is exploited, other species are also affected directly. According to the article, ‘Global Consequences of Overfishing’ states that, “...recent studies suggest that overfishing of large shark species has had a ripple effect in the shark 's food chain, increasing the number of species, such as rays, that are usual prey for large sharks, which result in declining stocks of smaller fish and shellfish favored by these species” It is also important to mention that overfishing often leads to the killing of other animals unintentionally. This is called bycatching. Some marine species that are affected by bycatching are juvenile fish, bottom feeding organisms, sharks, whales, sea turtles, and birds.
It also is toxic to many aquatic species during various parts of their life cycles. Oil can literally smother some species because it hinders their ability to absorb from the water. Plants and kelp are particularly affected by oil spills, and as the base of most ocean life it causes ripples up the food change, much like sea star wasting caused ripples down the food chain. Some species are more affected than others such as kelp, sea otters and marine birds all of which play critical roles in the marine ecosystem. Oil spills are yet another threat for these already threatened ecosystems.
Part of the problem with ocean acidification is human activity. Ever since the industrial revolution commenced, around one third of the carbon dioxide released by human interference has been absorbed by the ocean, which is one of the reasons of the drastic change in climate as well. Without the ocean absorbing carbon dioxide, the carbon dioxide n the atmosphere would be drastically higher, with possibly increasing the levels of climate change.The point of the research is to see how will the pH affect the organisms in the marine ecosystem and does carbonation affect an organism’s mass and form. Many organisms that are part of the marine food chain are going to be affected by ocean acidification due the levels of acidity deteriorating the calcium carbonate within the animal. It turns out
Another natural cause is oceans and hurricanes. Both the ocean waves and hurricanes accelerate erosion, which is a main cause to the marshes disappearing. Something New Yorkers should realize is that "80% of oil and natural gases produced in the U.S. travels through our marshes" as according to page 12. America 's economy could go so wrong if the marshes the oil processes through suddenly disappears. Also, a huge percentage of marine life loves in Louisiana 's marshes.
Negative Impacts Environmental Environmental impacts for example, Climate change, especially the rising ocean temperatures and Ocean Acidification is as of now influencing the Great Barrier Reefs Ecosystem. Coral bleaching coming about because of expanding ocean temperature and lower rates of calcification in skeleton-building life forms, for example, corals, because of sea acidification, are the impacts of most concern and are as of now obvious. Agricultural sources are adding to the waterfront and inshore territories of the Great Barrier Reef by expanded Nutrients, Sediments and different Pollutants in the catchment runoff. With the coastal population continuing to grow the coastal development grows which contributes to the modification