How Does DO Levels Affecting Ocean's Mortality?

I will say that as much as the expression “Canary in the coal mine” implies an early warning of danger in mines so does it in water too. In this case the fish directly helps us know the extent to which our ecological sphere is damaged, and helps humans to take the necessary precautions to save the environment.

Overfishing affects a biome by reducing the amount of species. According to the National Ocean Service (NOAA) the effects of overfishing in a coral reef biome leads to a limited amount of wildlife to reproduce. The ones that do reproduce will be smaller as larger wildlife which spawn more offspring are targeted and removed from the biome causing lower overall birth. This causes more algae to be in the environment which can lead to nutrient pollution due to a lack of wildlife that cleans the area of algae. The World Wildlife Foundation (WWF) found that the effects of overfishing on the ocean also caused imbalances in the populations of wildlife such as tuna and the disruption on herbivores by overfishing such as scallops lead to algae bloom in the ocean as well.

Oceans cover approximately 75% of Earth 's surface and are vital to this planet and the people who inhabit it. Oceans provide food, natural resources, and recreation for nearly everyone in this world. Unfortunately Oceans have been receiving mass amount of pollutants including oil spills, toxic waste dumping, and industrial dumping. These pollutants will have negative impacts on the wildlife in the ocean, as we are seeing already with the Coral Reefs, and soon enough it will begin to affect our lives as well.

When the dissolved oxygen level drops below 2.0 the trout seem to lose all their coloring. Once they lose their coloring they do not get it back.

The CTDEP collected bottom- dwelling fish and invertebrates and compared the quantity of organisms and number of species with the levels of oxygen in the water. Both of these studies confirmed that severe effects occurred whenever levels of oxygen fell below 2.0 mg/l. Large reductions in the numbers and types of aquatic life present were noted. The lab experiments recorded reductions in both growth and increase in death.

As the Dissolved oxygen increases so does the number of fish that are observed, until the ppm gets up to 14 then the

This article presents the impact of low oxygen waters on Chesapeake Bay Zoo-plankton. Anoxia (oxygen deficiency) reduces the cope-pod abundances in Chesapeake's bottom waters, and disrupts the cope-pods inhabits towards the bottom and their migration to the surface. Also, cope-pods will have limited survival ability in low oxygen conditions in bottom waters. Results show the number of cope-pods surviving for 24 hours were significantly lower in water containing smaller milligrams of oxygen liter. Some will have a greater chance of survival because of their low metabolism that requires smaller oxygen. Low oxygen reduces the filtration rate of zoo-plankton and the filtration rate of the fresh water. Decreased filtration reduces metabolic rate in low-oxygen conditions, generally occur in the mesohaline part in summer. Low oxygen-levels may cut phyto-plankton and Cope pod's production. Lower oxygen concentration prevents hatching and the growth of eggs, which eggs could survive a few days if temperatures are cold and as the eggs sink to the bottom.

Hypoxic zones, more commonly known as ‘Dead Zones,’ can be found all over the world, with the second-largest located in the Gulf of Mexico. They are lacking in life because of the absence of the atomic number 8, otherwise known as oxygen. According to the Environmental Encyclopedia, hypoxia occurs when the content of oxygen is below or between 2-3 milligrams per liter while for healthy waters 8 milligrams need to be found (“Dead Zones”). Therefore, dead zones are begotten from the lack of a sustainable amount of oxygen in a body of water.

Extreme environments such as the hydrogen sulfide-filled waters can derive from natural causes and also from human activity. Naturally, toxic gas from the earth and decaying organic matter -- most of the time large decomposing piles

Hypoxic zones also known as “dead zones” refers to decreased levels of oxygen in the water. Marine life die of suffocation due to the low oxygen concentration in these dead zones, which affects animal life in the ocean. These hypoxic zones occur particularly along the Gulf of Mexico, East Coast, and the Great Lakes. According to Cheryl Lyn Dybas, a journalist who specializes in marine sciences, stated that there are about 146 coastal dead zones worldwide (Dybas). In addition, since the 1960s the number of hypoxic zones has nearly doubled every passing decade (Dybas). Although dead zones can develop naturally, scientists are alarmed about how these zones have been augmented by human activity.

Imagine you are at the bottom of the ocean, and there are hydrothermal vents ejecting hot lava. Adding to your misery, there are huge amounts of hydrogen sulfide gas everywhere that are poisonous to your body. In reality, this is the giant tube worm’s ecosystem. Ecosystems are all of the living things (plants/animals) and the non-living things that live in a specific area and interact with each other. Ecosystems can be of any size. In an ecosystem, there are biotic and abiotic components that are all linked. The pelagic zone or “open ocean zone”, where the giant tube worm, an underwater animal that lives near hydrothermal vents, lives is located next to the continental slope/drop off. The water is much deeper here. At the surface, there is

Sediment collected from the riverbank as the river flows downstream is also a problem; it increases the turbidity of the river, and this makes it difficult for plants to receive the necessary sunlight needed for survival. When these plants die, there is less food for fish and other river animals. Bacteria levels also rise in the water, because it can cling to sediment very easily. When there is more sediment, there are more places for the bacteria to collect. (Helsel & Mueller, 2009). All of these problems are occurring as the water is flowing along the river banks, collecting even more sediment, and pollutants as it travels downstream and deposits into the Gulf of Mexico. When all of this sediment, nitrogen and bacteria flow into the Gulf of Mexico, it causes changes in the water there. The increase in the level of nitrogen causes plankton to grow faster. When the plankton decomposes it takes a large amount of oxygen out of the water. The bacteria break down the decomposed plankton, which releases carbon dioxide, taking increasing levels of oxygen out of the water in the Gulf. Eventually the level of oxygen decreases to a point where most living organisms cannot survive. Some animals flee while other plants and animals that cannot leave usually die. This is referred to as the Dead Zone in the Gulf of Mexico. (Gulf of Mexico; NOAA, 2009). With an expected increase in the size

II Over the years there has been a huge drop in the population of sharks, because of the popularity of Shark fin soup in china, and this can later on lead to the ocean ecosystem to be disrupted, if sharks are extinct.

At the same time, it will prevent oxygen saturation falling below 95%. The aeration of a storage vessel should be at a depth of at least 1m and a good quality diffuser is required to generate small bubbles. It will ensure good transfer of oxygen to the seawater. Smaller bubbles may increase the transfer of oxygen. Otherwise, cool seawater can contain more dissolved oxygen than warm seawater. The rate of oxygen consumption by the animals will increase as a result of many factors associated with storage and handling. For examples, rapid temperature changes, stress, overcrowding and limb loss.

Ocean pollution is one of the most urgent issues in our world today. The ocean is crucial to our ecosystem and it is being severely damaged at an alarmingly increasing rate. In this paper I will educate about the role the ocean plays in our beautiful Earth, why it is being so widely ignored and dismissed, the causes of pollution, and its effects on animals and humans alike.