Eutrophication Essay

Eutrophication is a concern in the Chesapeake Bay. Eutrophication is caused by excessive amounts of nutrients. Excessive nutrients in the bay have negative effects on the bay's ecosystem. The extra nutrients make the environment unbalanced. The extra nutrients cause a chain reaction that eventually kills most of the organisms in that area. This is what is known as a dead zone.

Even though, fertilizers are needed to supply essential nutrients to the growth of plants; an excess of them is one of the major issues contributing to pollution in the Chesapeake Bay Watershed. Fertilizers are mainly composed of two elements: nitrogen and phosphorus.(4) Throughout the years, millions of pounds of this nutrients are applied all around the Chesapeake Bay Watershed; everything not absorbed by the soil or taken up by plants eventually reaches the Chesapeake Bay through storm-water runoff. This nutrients end up creating algae blooms in the water, which reduce the amount of sunlight available to underwater grasses; not allowing plants to photosynthesize and produce the food they need to survive. Algae then decomposes creating dead zones killing fish and other species since oxygen is needed for any organism to live. (5)

Algae blooms have been an issue in the Chesapeake Bay, especially in the Baltimore Inner Harbor. Algae is a natural and critical part of the ecosystem, however in large doses it is harmful to the plants and organisms within the ecosystem. Algae blooms can block out sunlight and kill other plants in the water. Algae depends on various factors such as water, nutrients and carbon dioxide to grow. Eutrophication of the Inner Harbor has lead to algae blooms that have caused large fish kills in the past. When there is an over abundance of certain chemical nutrients eutrophication can occur. Runoff from land and farms is the main cause of excess nutrients into the water. The most common nutrients that are related to algae outbreaks are nitrate nitrogen and phosphate. In addition, a lack of dissolved oxygen can also be an indicator for the process of eutrophication and risk of an algae outbreak. A particular type of algae commonly found in Maryland is known as Prorocentrum minimum. Prorocentrum tends to cause “mahogany tides” causing water to be brown and have an odor. There has been a campaign launched by the Healthy Harbor

Harmful chemicals, manure, and pollution factor into it. These can cause large amounts of blue-green algae, which can be more of an issue then the nitrates. They take away oxygen from the water which would cause a decrease in organisms. In the article, “The muted voice in water quality debate is finally heard.” Mike Kilen (2016) says, “But while we focus on nitrates, we also can’t forget the dangerous bacteria and blue-green algae increasingly popping up in our rivers that are even more a danger to public health.” So although the fertilizer problem is important, the nitrates and phosphorous is not the only thing to worry

The Conodoguinet Creek is a one-hundred mile long body of water running through central Pennsylvania. This area has many pollution issues, such as Eutrophication and many others. Eutrophication is when there is too much nutrients in the water. Some people might not understand why too much nutrients in the water is a problem, but it is a very serious one. The higher amounts of nutrients in the water allows a larger amount of algae to grow on the surface of the water, absorbing all the dissolved oxygen in the water, leaving no oxygen left for the fish, and they die.

Back to the history, the eutrophication problem was first time concerned by public on Great lakes at the 1960s, the Lake Erie was covered by algae as a result of over dumped phosphorus from the sewage and other waste water, at that time, the Lake Erie was known as the “Dead Sea of North America”(Fitzpatrick, J. J., and Di Toro 1999). The reason cause this problem can be concluded in 2 points, 1. the stresses of overfishing, 2. development of phosphorus-based detergents. At the end of 1960, the Canada and the United States have realized the penetrance of this problem and finally sit on the table to sign an agreement that limiting phosphorus dumps to the Lake Erie, and plan to control existing unstoppable algal growth. Because of the awareness of Canada and US government, the concentration of phosphorus got a significant success. And this problem happened again during the 1990s, but this time the reason why this happen is more complexly.

There are innumerable sources of pollution to the Chesapeake Bay creating serious water quality issues. Run-off and discharge from natural, industrial and municipal sources causes nutrient overload, resulting in algae blooms. The algae blocks out the sun, which prevents native aquatic grasses from surviving. As the blooms die, they deplete the water of oxygen which is essential to the survival of all aquatic animals.

During the summers the oxygen content atop the water normally has a salinity level consistent with “more than 8 milligrams per liter”; but when oxygen content drops down to “less than 2 milligrams per liter” the water is then known to be in hypoxic state (CENR, 2000; USGS, 2006). Hypoxia is the result of oxygen levels decreasing to the point where aquatic organisms can no longer survive in the water column. Organisms such as fish, shrimps, and crabs are capable to evacuate the area but the fauna that cannot move either become stress and/or die. Due to this, many call the hypoxia zone the “dead zone” (Overview, 2008; USGS, 2006).

Let me go all APES here. Water contamination has been an issue across the country. Nutrients like phosphorous, which are found in many fertilizers, can runoff into streams and rivers causing eutrophication. Eutrophication is just a fancy word for these organic nutrients causing a reduction in dissolved oxygen in

The quality of the U-High creek was identified as excellent. However, water quality is not excellent in all areas. There are many ways that water is polluted by humans, including pesticides and fertilizers from farming. Farmers use chemicals to help their crops grow better, but those chemicals are washed through the ground when precipitation comes, causing the levels of nitrate and phosphate to increase in the creek (Lenntech, 1998-2016). These chemicals allow for more algae to grow in the process of eutrophication (Lenntech, 1998-2016). When that algae dies, lots of dissolved oxygen is needed to form bacteria. Thus, there is less oxygen in the water for the organisms to breathe, causing them to die. Bioaccumulation can occur, where

Sewage treatment plants, air pollution, animal feed lots, and polluted runoff from cropland are four major sources to this issue. All of these forms of pollution create an overabundance of nitrogen and phosphorous in the water. According to The Chesapeake Bay Foundation,“The largest source of pollution to the Bay comes from agricultural runoff, which contributes roughly 40 percent of the nitrogen and 50 percent of the phosphorus entering the Chesapeake Bay.” Although nitrogen and phosphorous are beneficial in moderation for the organisms living in the Chesapeake Bay, they cause a notable amount of damage in excess. Excessive amounts of nitrogen and phosphorous cause algal blooms. There are many different types of algae, some are good for the ecosystem, and some are dangerous and can cause “dead zones” where aquatic life no longer flourishes. Too much or too little of both good and bad algae can be extremely harmful to the marine

In this paper I will examine multiple perspectives in an attempt to understand the recent eutrophication of the Chesapeake Bay. Our textbook, Cambell Biology defines eutrophication as a process in which nutrients, usually phosphorus and nitrogen, are unusually present in a body of water, leading to algae blooms and accelerated growth. Anoxia is a condition in which areas of water are severely depleted of dissolved oxygen.

The limiting nutrient in a water source is what controls algal growth, no mater how much other nutrients is present, without that nutrient there will be no growth. In this regard it is imperative to know what the limiting resource is in a drinking water system in order to maintain the health of the system. Since phosphorous is naturally found in small quantities in water, if too much phosphorous is present then algal growth will increase. Having such high levels of algal growth can dramatically affect the lake’s health, and can effect how a municipal government must treat its water. The

When harmful blooms occur that can potentially impact the health of people using the rivers.

Water Pollution has been an increasing problem over the last few years. Pollution comes from many different things; agricultural, urban runoff, industrial, sedimentary, animal wastes, and leeching from landfills/septic systems just to name a few (Resources). The reason why pollution has increased over the years is because the rise in population and the advancements in technology the society has made. If society plans on having their resources here for many years to come they are going to have to make some drastic changes in the way they treat the earth, and these changes will have to start with their pollutants (Foundation).