As the parts per million of dissolved oxygen increases by 2 parts per million the number of fish observed increases. Once the PPM reaches 12 the ratio of fish declines showing diminishing returns.…
From the 0-12 ppm of dissolved oxygen the number of fish observed increased. From the point 13-14 ppm the number of fish decreased, but then increased from 15-18 ppm of dissolved oxygen.…
While observing the information in table 4, it appears that the number of fish changes from time to time and the oxygen increases and / or decreases when this occurs.…
* Because of the high organic production and decomposition in wetlands, their water and soil are low in dissolved oxygen.…
Once the sample was collected, pH, temperature, dissolved oxygen, and turbidity were measured. To determine turbidity, a transparency tube with a checkerboard pattern was used. The trasparency tube was emptied and then filled with water so that the pattern on the bottom could bnot be seen. Water was then slowly released and a measurement was taken when the checkerboard was visible again. There were some measurements that were not taken due to the lack of a thermometer on September 13th at Wellwoods Bayou and Wellwoods Lake. A sample bottle from each site was collected and analyzed by Meredith McManus in the lab to determine biological oxygen demand (BOD). Salinity was also measured at each site, but there was no salt present because all sites consisted of fresh…
ANS: As the dissolved oxygen levels of the water increase that the population of the fish increase as well.…
-Beneath the pycnocline, which can be as shallow as 5 meters, waters may become anoxic from may through August, as dead organic matter decays in the deep water causing it to become severe over time…
Hypoxic zones can occur naturally, but scientists are concerned about the areas created or enhanced by human activity. There are many physical, chemical, and biological factors that combine to create dead zones, but nutrient pollution is the primary cause of those zones created by humans. Excess nutrients that run off land or are piped as wastewater into rivers and coasts can stimulate an overgrowth of algae, which then sinks and decomposes in the water. The decomposition process consumes oxygen and depletes the supply available to healthy marine life (What is a dead zone?). Since these dead zones are becoming more popular, the animal life is becoming less suitable for more areas. When a dead zone occurs the fish that swim into the arewa get stuck and eventually die from lack of oxygen. Overall, the Bay has lost 98 percent of its oysters, about 80 percent of grasses. Looking at the pictures of dead zones there is a clear view of how terrible this disease is to the ecosystem. The whole bottom of the bay is clear of any living organism. In the Chesapeake Bay and many other areas the dead zones are formed by nutrients from agriculture and urban development within the Bay’s watershed, or the area of land that drains into a body of water, are washed into the Bay in excess quantities. These excess nutrients…
What effect did rising Oxygen levels have on life in the oceans and on land?…
In 2010, the Gulf of Mexico was the largest ever recorded dead zone of 7,700 square miles. Seven years later, the zone is still growing; the Gulf’s dead zone is now up to 8,776 square miles, larger than the size of New Jersey. The dead zone is caused by excess nutrients entering the water. Iowa’s waters are polluted by different causes affecting humans, and the growth of organisms.…
Ocean acidification impacts marine organisms to varying gradations. For example, photosynthetic algae and seagrasses may benefit from higher CO2 conditions as they require CO2 to live much like plants on land. On the contrary, studies have shown that a more acidic environment has a negative effect on calcifying species, such as oysters, clams, sea urchins, corals, calcareous plankton and many more. When shelled organisms are at risk, the entire food web is also at risk. Currently, over a billion people worldwide rely on food from the ocean as their primary source of protein. Many jobs and economies throughout the world depend on the fish and shellfish in our…
Fish is a good source of protein for many people around the world. The fish decline is caused by loss of food source, habit, and human. When fish are young they need, phytoplankton or microalgae to live but both are at a decline in the water. The change in the water temperature can affect the amount of phytoplankton or microalgae in the…
Oceans, lakes and rivers absorb 30 to 40% of the carbon dioxide produced by the human population. Ocean acidification has been a rising issue for the last three decades, and oceanographers have been studying the carbon dioxide effects on the ocean throughout that time. It is becoming increasingly problematic because the levels of carbon dioxide being emitted into the environment are greater. In the last 200 years, the ocean has become 30% more acidic because as more carbon dioxide is dissolved into the water, the more acidic the water gets. This is destroying the marine life that has had a stable pH level of ocean water for thousands of years. The oysters have been highly affected by the ocean acidification.…
The oxygen atmosphere that is depended on was generated by numerous cyanobacteria. Cyanobacteria gradually started to have a higher population, leading to more oxygen to be released into the atmosphere. Being aquatic bacteria the ocean and seas were filled with the oxygen produced. The oxygen underwater began to react with the abundant iron, eventually chemically cleaning the oceans of the iron through oxidation. Once the oxidized iron started settling to the ocean floor, the green color began to dissipate and the blue tint of oxygen took over. These developments were ecological disasters– oxygen was poison to the ancient inhabitants due to the tendency to attack bonds of organic molecules (Campbell, Reece, & Simon, 2007). The survivors of this catastrophe hid themselves in the depths of the ocean away from the threat of oxygen; the others adapted the ability to use photosynthesis.…
John Dutton’s essay “Toxic Soup” (2006) speculates about the effects that humans have on pollution in the ocean, as well as ways the damage can be reduced. In this essay, Dutton incorporates his personal experiences as a surfer and nature lover with statistics and his knowledge of the effects of water pollution on animals and humans. Dutton’s purpose is to raise public awareness of the need for environmental protection of the ocean in order to preserve and improve nature’s status. Given the language and references used, Dutton is writing for college educated adults interested in science and the environment.…