The California coast is a thriving ecosystem, both beneath the sea and in the cities that line its shore. For the purposes of our discussion, we will focus on mussels as an example species. Mussels, as we speak are being harmed by ocean acidification, and the damage is becoming more and more costly to our ecosystem. Global climate change, more commonly referred to as global warming, is an important factor in ocean acidification. At its most basic, climate change is the result of previously unheard of levels of carbon dioxide entering the atmosphere and creating a greenhouse effect within the earth’s atmosphere. This causes the average temperature of the planet to increase over time. The full effects of this kind of temperature increase are still being explored, but it is already clear that our planet is being harmed as a result. Ocean acidification is an extension of global climate change. It is the result of about a third of the carbon dioxide in the air seeping into the earth’s oceans. Ocean Acidification Our ocean, consisting of approximately 70% water and 30% land, is a vast surplus habitat that is unexplored and uncontrollable. Although humanity has achieved much in advancement in technology, resources, food, and more, nature is a factor that humanity cannot predict and manipulate. Nevertheless, our society has caused a grand shift in our global climate, a shift that is costly to our environment. One major reason to account for this shift is the utilization of fossil fuels into the environment. This process creates a multitude of carbon atoms that are released into the atmosphere, which is detrimental to our environment. To be exact, global warming is the process where there is an increase amount of greenhouse gases (such... ... middle of paper ... ...ze the importance of this issue and the urgent need for a resolution to climate change. Works Cited Dictionary.com. (2014, May 13). euphotic zone. Retrieved from Dictionary.com: http://dictionary .reference.com/browse/euphotic+zone Gruber, N., Hauri, C., Lachkar, Z,. Loher, D., Frölicher, T. L., & Plattner, G. (2012). Rapid progression of ocean acidification in the California Current System. Science, 220-223. doi:10.1126/science.1216773 Mackenzie, C. L., Ormondroyd, G. A., Curling, S. F., & Ball, R. J., Whiteley, N. M., & Malham, S.K. (2014). Ocean warming, more than acidification, reduces shell strength in a commercial shellfish species during food limitation. PloS One, 1-9. doi:10.1371 /journal.pone.0086764 Robles, C. (2014). Interview with Dr. Carlos Robles. Personal Collection of C. Robles, California State University Los Angeles, Los Angeles, CA.
Suresh, G., Horbar, J., Plsek, P., Gray, J., Edwards, W., Shiono, P., & ... Goldmann, D. (2004).
One of the Bays biggest resources is its oysters. Oysters are filter feeders which mean they feed on agley and clean the water. The oysters feed on agley and other pollutants in the bay turning them into food, then they condense the food down to nutrients and sometimes developed pearls. Filtering the water helps the oysters to grow, and also helps clean the Chesapeake Bay. One oyster can filter 50 gallons of water a day, Oysters used to be able to filter the Bay in about a week. However, these creatures are now scarce in the bay. The Chesapeake Bays Oyster (crassostrea virginica) Population has declined severely because of over harvesting, agricultural runoff, and disease. Now the Chesapeake Bay is becoming polluted without the oysters and the water is not nearly as clean as it once was. The Chesapeake Bay was the first estuary in the nation to be targeted for restoration as an integrated watershed and ecosystem. (Chesapeake Bay Program n/d). This report will show the cause and effect of the Chesapeake Bay's Oyster decline on the Bay.
Tadić, A., Wagner, S., Hoch, J., Başkaya, Ö., von Cube, R., Skaletz, C., ... & Dahmen, N. (2009).
Excessive nutrients from agriculture, development, and industry are harming the Chesapeake Bay. These excessive nutrients harm the habitat for many of the bays species. On top of the habitat being depleated, overfishing and diseases are also hurting the bays species. Nutrient loads can be reduced with the help of lawmakers to put a cap on the emissions allowed in the environment. If this is done the dead zone will start to recede, but the time and money need to be spent in order to save the bay.
Human activities have led to an exponential increase in the use of fossil fuel. The benefits of using fossil fuels are short lived in comparison to its long-term negative effects. In the last couple of decades, the major consumption of fossil fuel played a significant role in the rise of concentration of CO2 in the atmosphere. Roughly two trillion metric tons of CO2 have been emitted in the atmosphere and over a quarter of these got mixed with the ocean water resulting in ocean acidification (Buffie and Carr, 2010).
With carbon dioxide levels continuing to rise over the past few decades (fig. 1) and now into the future, concern has been brought to what is happening to the carbonate chemistry of the oceans. Because of these changes in chemistry, the ocean is becoming more acidic. Along with climate change, ocean acidification may be one of the greatest threats to our planet. The higher the ocean’s acidity level goes, the lower the calcium carbonate levels will drop. Even though this is a big scale issue, my goal is to focus on and underline what these changes will mean for the marine life that depend on the calcium carbonate in seawater. I will go in depth with specific regards to a study regarding pteropods or sea butterflies.
Shinno, H., Matsuoka, T., Yamamoto, O., Noma, Y., Hikasa, S., Takebayashi, M., & Horigughi, J. (2007).
Ocean acidity will spoil marine ecosystems if it remains persistent. Preserving sustainable fishing industries will become unmanageable if the carbon dioxide absorbed by the world’s oceans is not considerably abridged.
...oceans. Anthropogenic systems such as the combustion of fossil fuels since the industrial revolution have greatly increased the rate of acidification to levels where negative impacts ensue. Negative impacts occur both to marine organisms that rely on certain water conditions to maintain vital functions and the environment which is damaged by highly acidic waters. There is great variation in the acidity of each of the oceans, differences caused by the chemical composition of the ocean and biogeography. Understanding of the potential impacts of ocean acidification is relatively new to the scientific community and therefore little is known on how to counteract anthropogenic influences. Although reducing the amount of carbon dioxide produced will in turn reduce the lowering of the oceans acidity levels and reduce negative impacts on the environment and marine organisms.
Some studies have found “that atmospheric CO2 concentration is approximately 383 parts per million by volume (ppmv), a level not seen in at least 650,000 years, and it is projected to increase by 0.5% per year throughout the 21st century.” (Guinotte) “This is because…the ocean absorbs about a third of fossil fuel emissions, but this amount is likely to increase to 90% in the future.” (Bralower) As a result, “the chemistry of the world's oceans is changing at a rate not seen for 65 million years, with far-reaching implications for marine biodiversity and food security, according to a new United Nations study...” (Knight) “…This change is cause for serious concern [for] many marine organisms…, [because they] may not be able to adapt quickly enough to survive these changes.” (Guinotte)
The use of fossil fuels has greatly increased the amount of atmospheric and oceanic CO2 to a point where it’s ruining the natural flow of the world; the earth’s temperature is rising. As a result, the polar ice caps are melting causing the seas to rise. With only a 1 meter increase in sea level the United States alone could lose over 10,000 square miles of land, and thousands of houses will be destroyed. The effects will be just as prominent around the world: many islands will become submerged, 17% of Bangladesh will be underwater, and tens of thousands of people will be displaced (“Global Warming” 3).
As stated before climate change is a change in global or regional climate patterns. Climate change is expected to have the largest impact on the oceans and other large bodies of water especially through flooding and droughts. A few effects from climate change include rising sea levels due to thermal expansion and melting of glaciers, which will warm the ocean surface, and increase core temperature. Going back to Holthaus’ article he states that, “Possibly worse than rising ocean temperatures is the acidification of the water. Acidification has a direct effect on mollusks and other marine animals with hard outer bodies” (Holthaus). Acidification is the lowering of the oceans pH level, and this happens from carbon dioxide being released into the atmosphere. Climate change is effecting significant streams, because water levels in rivers and the rising temperatures are killing fish, especially salmon, that are unable to survive in these rivers. Holthaus says, “Salmon are crucial to their coastal ecosystem like perhaps few other species on the planet. A significant portion of the nitrogen in West Coast forests has been traced back to salmon, which can travel hundreds of miles upstream to lay their eggs. The largest trees on Earth simply wouldn 't exist without salmon” (Holthaus). With the warm and low level of water, there would not be any salmon and, without these salmon populating the rivers there would not be an
Oceans are such so vast that people underestimate the impact their actions —seeming so insignificant— have on them. Humans have by and large taken the oceans for granted; not considering how important a healthy ocean is to our survival. A popular mind-set is that the oceans are a bottomless supply of fish, natural resources, and an infinite waste dump. There are myriad reasons why the oceans should be saved and the most obvious one is marine life. With 71% of the Earth being covered by water, it is obvious that sea creatures are predominant form of life, making up 80% of the species of life on Earth. However, as important as marine life is, that is not the only reason why saving the oceans is crucial. The ocean floor provides natural resources such as, oil, natural gas, petroleum, minerals, medications, and ingredients for foods and products. The economic benefits of the oceans are huge and significant, as well. Fishing and fish products have provided employment to 38 million people and have generated about $124 billion in economic benefits. However, oceans are on the verge of crisis, marine life, natural resources, transportation, the economy, and important ingredients are at risk due to overfishing, pollution, and acidification. Thus, in this essay I will argue that, oceans are not impervious to human activity and threatening the health of the ocean threatens the health of humanity, since oceans key to our survival.
Barker, V., Giles, H., Hajek, C., Ota, H., Noels, K., Lim, T-S., & Somera, L. (2008).
The oceans need to be protected because it is where life began and if not taken care of, life as we know it will end. When dangerous substances go into the ocean, ecosystems are suffer and become endangered along with lives of people and of marine life. Surfrider Foundation recognizes the importance of protecting and preserving the quality and biodiversity of the world's coasts because they are truly irreplaceable. There is also historical evidence of ocean pollution being present in the past, but the problem still lingers today. Heal the Bay discovered that,“Did you know there is a DDT and PCB hot spot off the coast of Palos Verdes? This superfund site (which indicates it's one of the most polluted places in the United States), is left over from a 1930's era chemical plant. Because DDT takes so long to break down in the marine environment, it persists to this day, contaminating certain species of fish. There are also highly polluted sediments in the Long Beach area, a sign of the heavy shipping in the port. Heal the Bay works on developing effective capping and removal plans to keep those toxins from spreading” (Heal the Bay). DDT is still highly concentrated in the South Bay area and still contaminating different species of fish. Even after more than 80 years DDT, a toxic insecticide, is still very concentrated and during upwellings, DDT particles come back up and continue to harm marine life. If humans are careless about what is thrown on the floor or sprayed on lawns, it can lead to disastrous affects when it comes to the condition of the ocean's ecosystems, and can endanger life itself leading to a problem that only we can mend.