Although a drop of lake water may contain 1 million bacteria cells and 10 million viruses, only since 2012 has there been a long-term study of the lakes' micro-organisms. Laws, Robert R. Bidigare, John E. Dore, et al., Geochimica et Cosmochimica Acta, (1998), Effect of Phytoplankton Cell Geometry on Carbon Isotopic Fractionation, Vol. Welcome to the Great Great Lakes Region! These include the delicate opossum shrimp (order On both sides of the Canada–United States border, the proliferation of Overfishing has been cited as a possible reason for a decrease in population of various Since the 19th century an estimated 160 new species have found their way into the Great Lakes ecosystem; many have become invasive; the overseas ship ballast and ship hull parasitism are causing severe economic and ecological impacts.Scientists understand that the micro-aquatic life of the lakes is abundant, but know very little about some of the most plentiful microbes and their environmental effects in the Great Lakes. (1977), "Studies on the Autecology of the Marine Diatom Ships, no matter the size, are called During World War II, the risk of submarine attacks against coastal training facilities motivated the United States Navy to operate two aircraft carriers on the Great Lakes, In the early years of the 21st century, water levels in the Great Lakes were a concern.Alan B. McCullough has written that the fishing industry of the Great Lakes got its start "on the American side of Lake Ontario in The catch from these waters would be sent to the growing market for Except when the water is frozen during winter, more than 100 lake freighters operate continuously on the Great Lakes,Only four bridges are on the Great Lakes other than Lake Ontario because of the cost of building structures high enough for ships to pass under. Because of the location of the coal fields in Pennsylvania and Because the lake maritime community largely developed independently, it has some distinctive vocabulary. For the African region, see region that includes parts of Canada and the United StatesA region that includes portions of eight U.S. states and one Canadian ProvinceThe Middle Ground: Empires, Indians and Republics in The Great Lakes Region 1603–1815, Richard White, 1991 Cambridge University Press Outside of Chicago and Toronto, many other cities are host to financial centers as well. Agricultural associations joined the nineteenth century The region's greatest institutional contributions were major corporate, labor, educational and cooperative organizations. Major bank headquarters are located in Ohio including This article is about the North American region. National Geophysical Data Center, NOAA. This region's story mirrors the struggles and gains of women and Blacks in our country evidenced by the move of our conferences from community housing to mainstream hotels. Dunbar. The Great Lakes is a chain of inland lakes – Lake Ontario, Lake Erie, Lake Huron, Lake Michigan, and Lake Superior – stretching from New York to Minnesota. The visible part was the last part of the primeval continent to sink under the advancing Palaeozoic seas. This valuable resource is collectively administered by the state and provincial governments adjacent to the lakes, who have agreed to the Tourism and recreation are major industries on the Great Lakes.The large size of the Great Lakes increases the risk of water travel; The largest and last major freighter wrecked on the lakes was the Still missing are the two last warships to sink in the Great Lakes, the French minesweepers, In 1872, a treaty gave access to the St. Lawrence River to the United States, and access to Lake Michigan to the In 1998, the Canadian company Nova Group won approval from the Province of Ontario to withdraw 158,000,000 U.S. gallons (600,000 mThe Great Lakes Restoration Initiative, described as "the largest investment in the Great Lakes in two decades",System of interconnected, large lakes in North AmericaThis article is about the Great Lakes of North America. Because they comprise such a large waterway, they have played a vital role in the lives and histories of Indian peoples who have resided along their shores for millennia. Hoping for favorable claims of territorial control in an eventual peace treaty with Britain, American adventurers led by Kentucky militia leader Britain, fearing that fast American settlement could lead to annexation of its western provinces, countered with Settlement and economic expansion on both sides accelerated after the 1825 opening of The Agricultural and industrial production generated distinctive political and social cultures of independent republican producers, who consolidated an ideology of personal liberty, free markets, and great social visions, often expressed in religious terms and enthusiasms. Though contrary to federal laws in both countries, those treatment system upgrades have not yet eliminated During settlement, the Great Lakes and its rivers were the only practical means of moving people and freight. In response to disruptions and imbalances of power resulting from so vast a concentration of The Great Lakes region has produced globally influential breakthroughs in agricultural technology, transportation and building construction.
This temperature buffering produces areas known as "The Great Lakes have been observed to help intensify storms, such as Historically, the Great Lakes, in addition to their While the organisms living on the bottom of shallow waters are similar to those found in smaller lakes, the deep waters contain organisms found only in deep, cold lakes of the northern latitudes. Toronto is an international centre for business and finance. pp. The Great Lakes are the largest group of freshwater lakes on Earth by total area, and second-largest by total volume, containing 21% of the world's surface fresh water by volume.Though the five lakes lie in separate basins, they form a single, naturally interconnected body of fresh water, within the As the surfaces of Lakes Superior, Huron, Michigan, and Erie are all approximately the same elevation above sea level, while Lake Ontario is significantly lower, and because the Lakes Huron and Michigan are sometimes considered a single lake, called Lake Michigan–Huron, because they are one hydrological body of water connected by the Dispersed throughout the Great Lakes are approximately The Great Lakes also have several peninsulas between them, including the Pleasure boats can also enter or exit the Great Lakes by way of the In 2009, the lakes contained 84% of the surface freshwater of North America;The water level of Lake Michigan–Huron had remained fairly constant over the 20th century,The Great Lakes contain 21% of the world's surface fresh water: 5,472 cubic miles (22,810 kmIt has been estimated that the foundational geology that created the conditions shaping the present day upper Great Lakes was laid from 1.1 to 1.2 billion years ago,The Great Lakes are estimated to have been formed at the end of the The Great Lakes can have an effect on regional weather called The lakes also moderate seasonal temperatures to some degree, but not with as large an influence as do large oceans; they absorb heat and cool the air in summer, then slowly radiate that heat in autumn.
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