Browse "Nature & Geography"

Displaying 706-720 of 933 results

  • Article

    Ray

    Description Rays are flattened dorsoventrally, the body appearing disclike. The pectoral fins are attached to the side of the head. The mouth, nostrils and 5 pairs of gill slits are located on the white lower surface. A pair of spiracles occurs on the upper surface behind the eyes.

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  • Article

    Red Fife Wheat

    Red Fife is a bread wheat (Triticum aestivum) variety that David Fife and family began to grow in 1842 at their farm in Peterborough, Ontario. Its name is derived from the original red colour of the wheat kernel and the name of the farmer; this was a typical procedure for naming wheat in the mid-1800s.

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  • Macleans

    Red River Flood

    This article was originally published in Maclean’s magazine on May 12, 1997. Partner content is not updated. The flood of the century, they have been calling it in Manitoba, an awesome demonstration of nature’s raw might.

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  • Article

    Reforestation

    Many people believe a new sapling must be planted to replace every tree that is harvested. In fact, the FOREST regenerates naturally. After logging, young shoots grow and develop quickly because they have more room and good exposure to sunlight.

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  • Article

    Reindeer

    Reindeer, see CARIBOU.

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  • Article

    Reptile

    Reptiles are a group of vertebrate animals that, like mammals, produce an amniote egg, with extra-embryonic sacs for waste, yolk, and protection, and often possessing a shell, particularly if released by the female before development of the embryo is completed. DNA analysis has allowed comparison of the genes in common for living organisms and new fossils have augmented our knowledge of the sequence of appearance of many features. Combined, these lines of research have produced changes from classical classification in which birds were regarded as most closely related to mammals primarily because they are both endothermic (able to maintain an internal body temperature). Now it is believed that each evolved this feature independently and that birds are derived from dinosaurs. Today's reptiles represent 2 main lines: Parareptilia or Chelonia (turtles) and Eureptilia or Diapsida, which contains the Lepidosauria (Tuatara, lizards and snakes) and Archosuria (crocodilians and birds).

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  • Article

    Reserves in Saskatchewan

    Saskatchewan is home to at least 70 First Nations and various Métis communities. It contains 782 reserves, settlements and villages, many of which are located in the southern half of the province. Reserves in Saskatchewan were created between 1874 and 1906 by Treaties 2, 4, 5, 6, 8 and 10. As of 2016, 47.5 per cent of the province’s 114,570 self-identified First Nations peoples live on reserves, a percentage comparable to the province of Manitoba. Most of the remaining 47 per cent who reside off-reserve in Saskatchewan live in the cities of Saskatoon, Regina and Prince Albert.

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  • Article

    Reservoir

    Reservoirs, as discussed here, do not include any type of subsurface reservoir structure that stores water, natural gas or oil.

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  • Article

    Réservoir Gouin

    Réservoir Gouin, 1570 km2, elev 404 m, max length 102 km, average depth 5 m, is a collection of hundreds of small lakes containing innumerable islands in south-central Québec, equidistant from Ottawa, Montréal and Québec City.

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  • Article

    Manicouagan Reservoir

    The Manicouagan Reservoir, 1,942 km2, elevation 360 m, is located in southeastern Quebec, about 140 km from the Labrador border. The second-largest natural lake in Quebec, it was created by a meteorite millions of years ago. The name “Manicouagan” is possibly of Innu origin and might mean “where there is bark” (for canoe making). The lake appears on Jonathan Carver’s map of Quebec (1776) as Lake Asturagamicook, and is shown to be drained by the Manicouagan or Black River.

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  • Article

    Resource Management

    Resource management usually refers to the responsibility of governments to ensure that natural resources under their jurisdiction are used wisely or conserved.

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  • Article

    Resource Rights

    Natural-resource development has played a major role in Canada's economy and continues to be a focus of national concerns.

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  • Article

    Resource Towns in Canada

    Resource towns are small, isolated communities built around resource-based industries and transportation. They include mining towns, mill towns, railway towns and fishing villages. Resource development has long been a key factor in shaping the settlement and growth of communities. Some scholars have argued that all Canadian urban growth depends on the production of natural resources. (See also Staple Thesis.) Resource towns have been important agents in this production process. Because they depend on single industries, the economies of resource towns are often unstable.

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  • Article

    Resource Use

    Since prehistoric times, the inhabitants of what is now Canada used vegetation and animals for food, clothing and shelter. They fashioned implements and ornaments from MINERALS and, after the arrival of Europeans, used furs for trading.

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  • Article

    Natural Resources in Canada

    Natural resources are aspects of the natural environment from which goods and services can be obtained and produced. They include air, sunlight, water, land, vegetation, animal life and geological resources. People can also value natural resources for their own sake or for their aesthetic qualities. Humans must manage natural resources to sustain the benefits they offer. Canada is among the most resource-rich countries in the world. Its large and varied natural resources are essential to its economies and cultures. But there are ongoing debates about how to use, share and manage natural resources. Click here for definitions of key terms used in this article. This is the full-length entry about natural resources in Canada. For a plain-language summary, please see Natural Resources in Canada (Plain-Language Summary).

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