Lethal Concentration Lab Report

Pollution of Lake Huron has been over the years either through direct point sources or through non-point indirect sources (Saxena 1116). Direct point sources include sewage treatment firms and industries, which direct their wastes directly into Lake Huron and its tributaries. Nonpoint sources indirectly pollute water from the Lake, and majorly caused by man's activities and land policies applied by the man.

Rain washes the pesticides that are used in our Australians households and then become run-off in drains and sewers. They then make their way into nearby water bodies, wether that be creeks, rivers or even oceans and settle within the soil by sticking to small particles, including tiny living organisms like phytoplankton (M. Barwick, 2003, pp. 471-502). Small fish consume these tiny organisms, which may then be eaten by a larger organism and this continues until the top order consumer is reached. The concentration that first began in the phytoplankton and has multiplied sufficiently as it moves along the food chain. The amount of the pesticide has reached a highly toxic level in the top order predator, whether that is birds or even humans. As a result of the biomagnification of pesticides and other chemical the marine environment and the organisms that live within it are heavily affected. The build up of heavy metals, for example, it interferes with the formation of red blood cells, creates liver and kidney implications and forms reproductive defects in many organisms. This hinders an organism’s ability to survive and reproduce and can create a decline in species

Individual Daphnia magna are transferred to a microscopic slide using a pipette. The Daphnia was moving freely in a drop of H2O on the slide. For the control, the heart rate of D. magna is observed for 15 seconds

Daphnia Magna will be used to measure how quickly dead zones are forming by eutrophication. We will use three different endpoints to measure the Daphnia Magna: Heartbeat, Mobility, and Mortality. We will have three fertilizers mixed with pond water in three separate test tubes per fertilizer with Daphnia Magna and one without ferilizer as the control. There will be three different sets each set will contain four test tubes: Three test tubes each with different fertilizers and one without as the control. We will then measure the three endpoints of the Daphnia Magna after thirty minutes which will be repeated for each set thus the whole experiment will last 90 minutes. The equipment needed for the experiment is the following:

Daphnia are used to test water toxicity, they are a vital part of fresh water ecosystems. They are a food source for smaller fish and invertebrates and considered to be a consumer of algae and bacteria (Elbert, 2005). These small crustaceans range in size from 2-5mm long and are commonly referred to as water fleas. Daphnia belong to the group called Daphniidae, which is a relative of freshwater shrimp. It is easy to see the internal organs of daphnia because of a transparent taco shell like carapace. A carapace is the hard outer part of a shell or covering. A daphnia’s life span can range between 1-56 days. (Elenbaas, 2013; Clare 2002). The comfortable pH level for daphnia is between 7.2 and 8.5 (Clare, 2002).

to the body of Daphnia. For example, an experiment may test the effects of toxic chemicals on Daphnia, meaning that Daphnia can act as water quality indicators (Ren et al. 2009). The lack of Daphnia in certain areas signifies the presence of a toxic chemical, if the habitat meets the living requirements of Daphnia (Villegas-Navarro, 2003). Therefore, Daphnia act as indicators of environmental health as well as chemical responders reacting to potentially harmful

The experiment took place in a laboratory setting, and the first step was obtaining sixty individual Daphnia magna (that were neither adults nor tiny offspring) from a large tank in the lab. These individuals were equally divided into three groups; low density, medium density, and high density. The twenty Daphnia assigned to the low density group were split into four groups of five and pipetted into one of four tubes filled with 10mL of Chlamydomonas algae. The twenty Daphnia assigned to the medium density group were split into two groups of ten and placed into one of two tubes also filled up to 10mL with Chlamydomonas. The final twenty Daphnia were all placed into a single tube filled with 10mL of the algae. In order to avoid suffocation-related

The Clean Water Act (CWA) is the primary federal law in which the US governs water pollution. The Act states the objectives of eliminating releases of high amounts of toxic substances into water. The CWA made it unlawful to dump toxic materials into navigable, waters unless given a permit. The permit is given through the EPA’s National Pollutant Discharge Elimination System. The purpose of The National Pollutant Discharge Elimination System is to regulate point sources that flow into bodies of water. The Clean Water Act has been changed over the years because of

Often, toxic substances are being drained into the air, waterways, and undergrounds wells. According to the report by Environmental Protection Agency (EPA), over 60 million pounds of deadly chemicals are produced by industries in Florida. Notably, Florida’s water has been suffering mercury contamination until the state’s department of migration issues a circular regularly for regulations of eating freshwater fish in the region (Florida Fish and Wildlife Conservation Commission). In fact, such metals emanate from coal combustion’s emissions which run into water bodies. Not to mention, pesticides and herbicides utilized by government and homeowners pollute the environment (Florida Fish and Wildlife Conservation Commission). Indeed, all chemicals released into the atmosphere find themselves in rivers.

The Clean Water Act (CWA) founds the elementary structure for regulating releases of contaminants into the water bodies of the US and also for surface waters it regulates quality standards. The origin of the CWA was passed in 1948 and was named the Federal Water Pollution Control Act, then the Act was suggestively reorganized and prolonged in 1972. as "Clean Water Act" this became the Act 's communal name after amendments in 1972.Further down to CWA, EPA has applied other pollution control agendas such as for industry, the setting wastewater standards. We similarly have set some water quality standards for all pollutants in surface waters.

Since the news hit that Playboy is pulling all nude photos in the spring of next year many news companies all have shared their own view, however we are only going to look at two of them. Starting with the headlines from The New York Times, Playboy, an Aging Roue, Finds That Nudes Are Now Old News as it Seeks Readers. There is also CNN who states “Larry Flynt thinks Playboy’s nude-free move is ‘ludicrous’.” In both articles we will explore playboy on how it came about and the new direction it is going, along with how, Hugh Hefner and Cory Jones, one of the top editors at Playboy came to this decision, as well as any bias’ that the articles may have and how it relates to sociology.

The Federal Water Pollution Control Act (FWPCA) (P.L. 80-845, 62 Stat. 1155) of 1948 was the first major law enacted by Congress to address the problems of water pollution in the United States (n.d). Legislators created over 100 bills in an attempt to pass legislation over the previous half century, but were not successful. Industrial and urban growth caused by World War II in 1948, led to obvious, notorious pollution of the country's rivers, streams, and lakes, urging Congress to finally address the issue. Unfortunately, the act was not designed well enough to achieve the goals set out to address the issue. It did not ban pollution, only gave limited power to the federal government, and provided an extremely awkward enforcement mechanism. The Federal Water Pollution Control Act was not successful in preventing and reducing water pollution. Pollution continued to increase because of the federal government's inability to require any direct reduction in discharges. As a result, the quality of the nation's waters had no improvement. On the other hand, the act established a popular and political support for pollution control efforts. Congress rewrote the act in 1972 to provide more acceptable protection for the nation's waters. It also established the basic agenda for water pollution control, which was amended by Congress afterwards. Congress made changes to the act six times before rewriting it in 1972.

Not only is pollution the cause of the death of many organisms essential to ecological balance, but human drinking water has also been affected.

The Clean Water Act, otherwise known as the Federal Water Pollution Control Act, was passed in 1972 and aims to maintain the integrity of the United States’ waters by regulating the discharge of pollutants and maintaining quality standards for surface waters. One important type of regulation under the Clean Water Act is of nonpoint pollution sources, sources of water pollution that do not diffuse from a single identifiable source including agricultural pesticides, animal wastes and other components of runoff or groundwater. Because nonpoint source pollution, or NPS, is diffused by a variety of widespread avenues, from rainfall to wind, it accounts for a majority of water pollution and is extremely difficult and complex to regulate. The

Throughout history, humans have been polluting this earth without even knowing it; so far managing to dump over five trillion pieces of trash into the oceans, which is almost three hundred thousand tons of garbage. This harmful act is creating hazardous effects on the environment, killing over fourteen million birds, and one hundred thousand sea mammals. The environment is coming back for revenge on humans by contaminating drinking water. The quality of drinking water is getting significantly worse for humans compared to what it was one hundred years ago Where the industrial revolution created new sources of water pollution, resulting in the clean water act of nineteen forty eight. This was the first law to regulate pollution, and set the stage for how people should treat the environment. Although this law has basic fundamentals needed at that point in time, it is not a strict enough policy for today's society. From oil spills to toxic waste, humans have been inconsiderate to themselves and the environment around them, ignoring the clean water act. An example of this tragic history would be the Exxon oil spill of 1989 where a large company (Exxon Valdez) accidently spilled almost eleven million gallons of oil into the Gulf of Alaska. This single example affected the lives of billions of living organisms, not to mention the effects on humans (Corporate Pollution n.pag.). Along with these chemical spills comes the chemical trichloroethylene (TCE). This chemical is a