Lake Erie

From Wikipedia, the free encyclopedia

Lake Erie
Lake Erie, looking southward from a high rural bluff near Leamington, Ontario
Coordinates	42°30′N 81°00′W
Primary sources	Detroit River
Primary outflows	Niagara River
Basin countries	Canada, USA
Max-length	388 km
Max-width	92 km
Surface area	9,940 square miles (25,745 km²)^[1]
Average depth	19 m
Max-depth	210 feet (64 m)^[1]
Water volume	484 km³
Residence time (of lake water)	2.6 years
Shore length¹	4385 km
Surface elevation	571 feet (174 m)^[1]
Islands	24+ (see list)
Settlements	Buffalo, New York Erie, Pennsylvania Toledo, Ohio Monroe, Michigan Cleveland, Ohio
¹ Shore length is an imprecise measure which may not be standardized for this article.

Lake Erie (pronounced [ˈi.ɹi]) is the eleventh largest lake on Earth^[2] and, of the five Great Lakes of North America, it is the fourth largest by surface area, the southernmost, shallowest, and smallest by volume.^[3]^[4] It is bounded on the north by the Canadian province Ontario, on the south by the U.S. states of Ohio, Pennsylvania, and New York, and on the west by the state of Michigan. The lake is named after the Erie tribe of Native Americans who lived along its southern shore before being killed off or driven away by European settlers.^[3]

The lake creates a favorable environment for agricultural pursuits in the bordering areas of Ontario, Ohio, Pennsylvania, and New York. In addition, its waters are home to numerous fish species, making it a popular site for commercial fishing. However, since high levels of pollution were discovered in the 1960s and 1970s, there has been continued debate over the extent of commercial fishing and measures used to protect the lake.

1 Geography
2 History
3 Ecology
4 Geology
- 4.1 Islands
5 See also
6 References
7 Images
8 External links

[edit] Geography

Lake Erie (42°30'N, 81°00'W) is the world's 11th largest lake^[2] and has an elevation of 571 feet (174 m)^[1] above sea level. It has a surface area of 9,940 square miles (25,745 km²)^[1] with a length of 241 miles (388 km) and breadth of 57 miles (92 km) at its widest points.

Frozen Lake Erie from Cleveland

The average depth is 62 feet (19 m) with a maximum depth of 210 feet (64 m).^[1] The western section, comprising one-fourth of the area, is shallower with an average depth of 42 feet (13 m) and a maximum depth of 62 feet (19 m).^{[citation needed]}

For comparison, Lake Superior has an average depth of 483 feet (147 m), a volume of 2,900 cubic miles (12,100 km³) and shoreline of 2,726 miles (4385 km).^{[citation needed]}

Lake Erie is primarily fed by the Detroit River (from Lake Huron and Lake St. Clair) and drains via the Niagara River and Niagara Falls into Lake Ontario. Navigation downstream is provided by the Welland Canal, part of the Saint Lawrence Seaway. Other major tributaries of Lake Erie include the Grand River, the River Raisin, the Huron River, the Maumee River, the Sandusky River and the Cuyahoga River.

Lake Erie and the other Great Lakes

The American states Ohio, Pennsylvania and New York are located to the south of Lake Erie; Michigan lies to the west, and the Canadian province of Ontario lies to the north. Point Pelee National Park, the southernmost point of the Canadian mainland, is located on a peninsula extending into the lake. Several islands are found in the western end of the lake; these belong to Ohio except for Pelee Island and 8 neighboring islands, which are part of Ontario.

The cities of Buffalo, New York; Erie, Pennsylvania; Toledo, Ohio; Monroe, Michigan; and Cleveland, Ohio are located on the shores of Lake Erie. It was the last of the Great Lakes discovered by the French explorers, who had followed rivers out of Lake Ontario and portaged into Lake Huron.

[edit] History

See also: 1813, Battle of Lake Erie, and Oliver Hazard Perry

Please help improve this article by expanding this section.
Further information might be found on the talk page or at requests for expansion. Please remove this message once the section has been expanded.

In 1669, the Frenchman Louis Jolliet discovered Lake Erie which led to French settlements being established a few years later.

Lake Erie is the shallowest of the Great Lakes and infamously became very polluted in the 1960s and 1970s. Urban legend has described it as a dead lake, but both sport and commercial fishing have continued without interruption to the present day. Pollution in the lake did not get much attention until the great Cuyahoga River Fire in June of 1969. Pollution from Cleveland and other Ohio cities had so contaminated this tributary of Lake Erie with petrochemicals that it actually caught on fire. The fire embarrassed state officials and prompted the U. S. Congress to pass the Clean Water Act.

[edit] Ecology

Sour cherry orchard on Lake Erie shoreline
Leamington, Ontario

Like the other Great Lakes, Erie produces lake effect snow when the first cold winds of winter pass over the warm waters, leading to Buffalo, New York being the eleventh snowiest place in the entire United States.^[5] The lake effect ends, however, when the lake freezes over. Being the shallowest of the Great Lakes, it is the most likely to freeze and frequently does.^[6]

The lake is also responsible for microclimates that are important to agriculture. Along its north shore is one of the richest areas of Canada's fruit and vegetable production, and along the southeastern shore in Ohio, Pennsylvania, and New York is an important grape growing region, as are the islands in the lake.

During the 1960s and 1970s, Lake Erie experienced changes in water quality associated with increasing levels of the nutrient phosphorus in the water and bottom sediments. The result was eutrophication of the system which resulted in major changes in productivity and algal blooms. The decomposition of algae led to extensive seasonal anoxic areas in the lake (the so-called dead zone), that were expanding rapidly in the early 1970s. The decomposing algal masses and associated fish kills fouled shorelines, contributing to the widespread impression of Lake Erie as a dead lake.

A 1972 agreement between Canada and the United States reduced the dumping and runoff of phosphorus into the lake significantly. A dead zone persists in the central Lake Erie basin during the late summer. The U.S. Environmental Protection Agency is currently studying this cyclic phenomenon.^[7]

Since the 1970s environmental regulation has led to a great increase in water quality and the return of economically important fish species such as walleye and other biological life.^[8]

However, the lake ecosystem is much changed from its original state, with a long list of invasive species well established. Common fish species such as rainbow smelt, alewife, white perch and common carp have all been introduced from outside the Great Lakes. Non-native sportfish such as rainbow trout and brown trout continue to be stocked for anglers to catch. Attempts were made to stock the lake with Coho Salmon were made, but met with failure, and that species is now nearly once again absent from the lake. Recent invaders, zebra and quagga mussels have populated the entire Lake Erie ecosystem, altering energy flow through the food web away from the pelagic zone and into the benthic zone.

Other invasive species, such as the goby (recently arrived) and the grass carp (on the doorstep), have increased public debate about the risks of non-native invaders to Great Lakes ecosystems.

Lake Erie is home to one of the world's largest freshwater commercial fisheries. Once a mainstay of communities around the lake, commercial fishing is now predominantly based in Canadian communities, with a much smaller fishery, largely restricted to yellow perch, in Ohio. The Ontario fishery is one of the most intensively managed in the world. It was one of the first fisheries in the world managed on individual transferable quotas (ITQs) and features mandatory daily catch reporting and intensive auditing of the catch reporting system. Still, the commercial fishery is the target of critics who would like to see the lake managed for the exclusive benefit of sport fishing and the various industries serving the sport fishery.

Commercial landings are dominated by yellow perch and walleye, with substantial quantities of rainbow smelt and white bass also taken. Anglers target walleye and yellow perch, with some effort directed on rainbow trout. A variety of other species are taken in smaller quantities by both commercial and sport fleets.

Although management of the fishery is by consensus of all management agencies with an interest in the resource (the states of New York, Pennsylvania, Ohio and Michigan and the province of Ontario) under the mandate of the Great Lakes Fishery Commission, and driven by comprehensive fisheries assessment programs and sophisticated mathematical modeling systems, it remains the source of considerable recrimination, primarily from United States based angler and charter fishing groups with an historical antipathy to the commercial fishery. This conflict is complex, dating from the 1960s and changes in U.S. fisheries management that led to elimination of commercial fishing in most U.S. Great Lakes states. The process began in the state of Michigan, and its evolution is well documented in Szylvian (2004)^[9], using Lake Michigan as a case study. The underlying issues are universal, wherever sport and commercial fishing coexist, but their persistence in the Lake Erie context, one of the most intensively scrutinized and managed fisheries anywhere, suggests that these conflicts are cultural, not scientific, and therefore not resolvable by reference to ecological data. These debates are largely driven by social, political and economic issues, not ecology^[10].

[edit] Geology

Lake Erie has a lake retention time of 2.6 years, which is the shortest of all the Great Lakes.^[11]

Lake Erie's shallowness makes it particularly prone to seiches, especially during storms, when the lake water tends to pile up at one end of the lake. This can lead to huge storm surges, potentially causing damage onshore. During one storm in November 2003, the water level at Buffalo rose by 7 feet (2.1 m) with waves of 10-15 feet (3-4.5 m) on top of that, for a cumulative rise of as much as 22 feet (6.7 m). Meanwhile, Toledo at the western end of the lake will measure similar drops in water level. After the storm event, the water will slowly slosh back and forth, similar to the effect in a bath tub, until equilibrium is re-established.

[edit] Islands

Partial map of the Lake Erie islands

Some of the Lake Erie islands

[edit] See also

[edit] References

^ ^a ^b ^c ^d ^e ^f Wright, John W. (ed.), Editors and reporters of The New York Times (2006). The New York Times Almanac, 2007, New York, New York: Penguin Books, 64. ISBN 0-14-303820-6.
^ ^a ^b Large Lakes of the World. Factmonster.com.
^ ^a ^b Lake Erie - Facts and Figures. Great Lakes Information Network.
^ Erie, Lake. Factmonster.com.
^ Answers: 10 snowiest 'cities' aren't all in New York. Chris Cappella, USATODAY.com.
^ What's the physics behind "lake effect snow"?. the Straight Dope Science Advisory Board.
^ Lake Erie 'Dead Zone'. US EPA Lake Erie 'Dead Zone'. URL accessed on December 15, 2005.
^ Recovery of Lake Erie Walleye a Success Story. Michigan Department of Natural Resources.
^ Szylvian,K.M. 2004. Transforming Lake Michigan into the 'World's Greatest Fishing Hole': The Environmental Politics of Michigan's Great Lakes Sport Fishing, 1965–1985.
^ Berkes, F. 1984. Competition between commercial and sport fishermen: an ecological analysis. Human Ecology 12: 413-429.
^ Great Lakes; Basic Information: Lake Erie. U.S. Environmental Protection Agency.