Browse "Nature & Geography"

Displaying 76-90 of 933 results

  • Article

    Beluga Whale

    The beluga, or white whale, is a type of toothed whale found in Canada’s Arctic, Hudson Bay and St. Lawrence estuary.

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  • Article

    Beneficial Insect

    Most insects are beneficial, playing many ecological roles. Less than 1% are pests. They are the principal food of many birds and reptiles, and the survival of insect-pollinated plants depends on them.

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  • Article

    Betula Lake

    Betula Lake, Manitoba, is a freshwater lake and resort area in Whiteshell Provincial Park, 145 km by road northeast of Winnipeg. Opened to cottage development in the 1950s, Betula is a popular swimming, waterskiing and fishing area.

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  • Article

    Bighorn Sheep

    Bighorn Sheep, see MOUNTAIN SHEEP.

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  • Article

    Biodiversity

     Biodiversity is the variety of life (genetic, species and ecosystem levels) on Earth or some part of it. It includes all living forms, plants, animals and micro-organisms. It is the natural wealth of a region that provides resources and ecological services.

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  • Article

    Biogeoclimatic Zone

    For example, in British Columbia, the Coastal Western Hemlock Zone is one of 14 biogeoclimatic zones. It occupies high precipitation areas up to 1000 m elevation west of the coastal mountains from the Washington to Alaska borders and beyond.

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    Biogeography

    Ecology is subdivided into 3 fields of study: autecology (relations of individual species or populations to their milieu), synecology (composition of living communities) and dynecology (processes of change in related communities).

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    Biological Oceanography

    Biological Oceanography is a branch of oceanography that studies living organisms (ie, the biota) in the sea in relation to their environments.

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    Biology

    Biological studies of individuals and groups of organisms can occur at various levels (eg, molecular, cellular, anatomical, functional, behavioural, ecological and evolutionary).

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    Biosphere Reserves in Canada

    A biosphere reserve represents one of the world’s important ecosystems and is divided into three zones: a protected core zone (such as a park or wildlife area), a buffer zone around the core, and a transition zone that fosters sustainable economic and cultural activity. The World Network of Biosphere Reserves includes 686 sites around the world, 18 of which are in Canada. The network is part of the larger Man and the Biosphere Program of the United Nations Educational, Scientific and Cultural Organization (UNESCO). Biosphere reserves are designated by UNESCO to help conserve biodiversity, demonstrate sustainable development and build the local community’s capacity to deal with human and environmental issues.

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  • Article

    Birch

    Birch (Betula), genus of trees and shrubs of birch family (Betulaceae). About 50 species are found in Arctic and northern temperate regions worldwide

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    Bird

     A Bird is a member of a unique group of vertebrates, Class Aves. The fossil record, comparative anatomy and embryology indicate that Birds have a common ancestry with Reptiles and Dinosaurs.

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    Bird Classification and Evolution

    Archaeopteryx, the oldest bird yet discovered, is known from several fossils recovered from fine slate deposits in Germany. This magpie-size animal lived in a tropical environment about 150 million years ago.

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    Bird Distribution and Habitat

    Animals' lives are circumscribed by 2 imperatives: finding food for survival, growth and reproduction and avoiding becoming prey before reproducing. For an animal to occupy a habitat, it must be able to survive and reproduce within it. Birds have evolved many ways of meeting these challenges.

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  • Article

    Bird Feathers

    Feathers are only found on birds. They probably evolved as a temperature-control device from scales, much like those of modern reptiles. 

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