LAKE ERIE CASE STUDY EUTROPHICATION AND DEAD ZONES

Becky Oskin, Contributing Writer Becky Oskin covers Earth science, climate change and space, as well as general science topics. Changes in agricultural practices include: Follow Becky Oskin beckyoskin. These health problems may occur not just from drinking it, but also through skin contact, such as swimming in the polluted water or taking a shower in your house. Lake Erie Ecosystem Case Study.

The government is also funding efforts to restore wetlands along the Gulf coast to naturally filter the water before it enters the Gulf. Hence, focusing on one river may improve algae conditions, but not the dead zone. Photo courtesy of NOAA. Hide Caption Satellite image of the Gulf of Mexico. Click image to enlarge. Watching World Droughts and Food Stocks. Decades of dumping bring Chitlopakkam Lake to the edge.

Lake Erie Dead Zone: Don’t Blame the Slime!

However, by not turning the soil over, the practices also concentrate fertilizers near the surface where they are more likely to flow off of the land during zoes storms. According to the Huffington Post on August 6,more thanof the human population living near or around Lake Erie did not have access to safe drinking water because of algal blooms Kate, Hypoxic water supports fewer organisms and has been linked to massive fish kills in the Black Sea and Gulf of Mexico.

Despite the differences, both eutro;hication Lake Erie’s environmental problems are ultimately caused by agricultural runoff and human activity, which result in too much phosphorous entering the lake, said study co-author Anna Michalak, an earth scientist at the Carnegie Institution of Science at Stanford University in California.

Michalak and her colleagues are examining how climate change is likely to worsen Lake Erie’s environmental issues.

The algal lwke can be a problem for people living near the lake, because some kinds of algae emit toxins that irritate the nerves and organs of humans and other animals. Strong winds stir up the lake. However, with anthropogenically increased nitrogen and phosphorus input, algae growth is no longer limited.

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Lake Erie Ecosystem Case Study – A Closer Look At Algal Blooms

Algal blooms and dead zones in Lake Erie were severe during the s, caused primarily by large releases of phosphorus from sewage and industrial plants. The lack of oxygen is called anoxia. Researchers are now closing in on what caused the spike in dissolved phosphorous.

Also, birds are increasingly dying from a disease called avian botulism, which is caused by bacteria in environments of warm weather and high nutrients, like an algal bloom USGS Na tional Wildlife Health Center, Good article but hypoxia is reduced oxygen low concentrationnot the lack of it.

You might also like Dams Demolished, Rivers Revived. Navigation What is this stuff? Hide Caption Satellite stuxy of the Frie of Mexico.

Michalak also acknowledged the complicated relationship between nutrient loading and algal blooms and hypoxia. According to models used in the EcoFore project, climate changes alone would not be enough to create the observed rise in dissolved reactive phosphorous. Nitrogen and phosphorous enter the river through upstream runoff of fertilizers, soil erosion, animal wastes, and sewage.

lake erie case study eutrophication and dead zones

The studies, drawing on institutions from across the Great Lakes, also found that climate change is increasing the urgency of developing ways to keep fertilizers on fields, and may mean that larger reductions in phosphorus will be necessary to alleviate Great Lakes algal blooms. The findings, and those of other studies from across the Great Lakes region, are delivering an ever clearer picture of the specific causes of nonpoint phosphorus runoff, algal blooms, and dead zones.

A dead zone can also form when the lake water is stratified by temperature, with warm water ektrophication top of cold water. In a natural system, these nutrients aren’t significant factors in algae growth because they are depleted in the soil by plants. Dead zones can be found worldwide link to NASA dead zone page.

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The Gulf of Mexico Dead Zone

There are also invasive species that factor into the causes of algae blooms in Lake Erie. World Water Day Decades of dumping bring Chitlopakkam Lake to the edge. Don’t Blame the Slime! Becky Oskin, Contributing Writer Becky Oskin covers Earth science, climate change and space, as well as general science topics.

You need to look at them as a coupled set. Feel free to contribute!

lake erie case study eutrophication and dead zones

Changes in the timing and method of applying agricultural fertilizer are the primary drivers behind the increasing amounts of phosphorus entering Lake Erie and causing toxic algal blooms and a large dead zone, according to new basin-wide scientific studies. In contrast, the following year saw one of biggest droughts to hit the United States in 50 years. Other factors, like temperature and winds that drive lake circulation, also play a role in the size and intensity of algal blooms.

Last fall a toxic algal bloom in the lake forced officials to shut off a public water supply system in Ohio. A series of intense spring storms infor example, drove a record algal bloom in the lake that summer.

The zone occurs between the inner and mid-continental shelf in the northern Gulf of Mexico, beginning at the Mississippi River delta and extending westward to the upper Texas coast.

lake erie case study eutrophication and dead zones

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