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ECOREGIONS AND BIODIVERSITY

ECOREGIONS AND BIODIVERSITY. OUTLINE. ECOREGIONS TERMS TO KNOW ECOREGION DEFINITION NL ECOREGIONS OUR ECOREGION BIODIVERSITY DEFINITION FACTORS THAT AFFECT BIODIVERSITY ACTIVITY. TERMS TO KNOW. ECOSYSTEM A ll the living organisms and the physical environment in which they live .

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ECOREGIONS AND BIODIVERSITY

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  1. ECOREGIONS AND BIODIVERSITY

  2. OUTLINE • ECOREGIONS • TERMS TO KNOW • ECOREGION DEFINITION • NL ECOREGIONS • OUR ECOREGION • BIODIVERSITY • DEFINITION • FACTORS THAT AFFECT BIODIVERSITY • ACTIVITY

  3. TERMS TO KNOW • ECOSYSTEM • All the living organisms and the physical environment in which they live. • RANGE OF TOLERANCE • The unique set of physical conditions in which organisms can SURVIVE. • Example: • Cod have a temperature range of tolerance of -0.5oC to 10oC • OPTIMUM RANGE • The narrower range in which organisms can THRIVE. • Example: • Cod prefer a much smaller temperature range.

  4. TERMS TO KNOW. . . • POPULATION • The total number of the SAME SPECIES living in an area. • Example: • Brook Trout population in George’s Lake • COMMUNITY • The total number of all of the DIFFERENT SPECIES living in an area. • Example: • George’s Lake Community • _______________________________________________________________________________________________________________________________________

  5. ECOREGION DEFINITION • ECOREGIONS are areas of general similarity in ecosystems. • In other words, an ecoregion is: • An area of land or water that contains a geographically distinct collection of natural communities.

  6. NL ECOREGIONS • NL ecoregions are defined by the following factors: • Climate • Soil • Geology • Topography • Flora (plants) • Fauna (animals) • There are 9ecoregions on the island of Newfoundland and 12ecoregions in Labrador. • Picture p. 59 in TEXT

  7. OUR ECOREGION • SOUTHWESTERN NEWFOUNDLAND

  8. SOUTHWESTERN NL • OUR LOCATION: • Runs from just south of Northern Peninsula to west of the southern Long Range Mountains and the Buchans Plateau. • Major communities are: • Stephenville and Corner Brook. • Most common land use activities are: • Forestry, pulp and paper, farming, fishing, hunting

  9. SOUTHWESTERN NL • OUR CLIMATE: • Seasonal trends: • Cool Summers, Snowy Cold Winters • Mean Temperatures: • Annual overall: 4oC • Summer: 12oC • Winter: -3.5oC • Precipitation: • Annual: 1000-1200 mm

  10. SOUTHWESTERN NL • OUR SOIL: • Best growing conditions on the island, because Long Range Mountains protect parts of the ecoregion from Northeasterly winds.

  11. SOUTHWESTERN NL • OUR TOPOGRAPHY: • Elevations range from SEA LEVEL to JUST OVER 800 m ABOVE sea level, in the Lewis Hills, the highest point in Newfoundland. • A lowland runs from St. George’s to Grand Lake.

  12. SOUTHWESTERN NL • OUR FLORA • Balsam Firis the dominant tree species. • Also some black spruce, tamarack, and shrubs growing in poorly drained areas.

  13. SOUTHWESTERN NL • OUR FAUNA: • Black bear • Moose • Caribou • Red fox • Marten • Lynx

  14. BIODIVERSITY • DEFINITION: Variety of life on Earth. • Why is BIODIVERSITY IMPORTANT? • Biodiversity measures of the HEALTH of ecosystems. • The GREATER the biodiversity, the GREATER the sustainability of the ecosystem. • In other words: • Biodiverse ecosystems can bounce back more easily from any changes that may take place in the area.

  15. 3 FACTORS THAT AFFECT BIODIVERSITY • 1. SPECIES DIVERSITY • Different kinds of species living in an area. • Allows for more feeding relationship variety.

  16. 3 FACTORS. . . • 2. GENETIC DIVERSITY • A variety of genetic traits in a population. • Allows for greater chances of species survival.

  17. 3 FACTORS . . . • 3. ECOSYSTEM DIVERSITY • A variety of flora and fauna in an area. • Allows for greater overall ecosystem stability in response to change. • Changes can include: • Natural disturbances • Example: Forest Fire, Disease, Extreme Weather • Human disturbances • Example: Pollution, Habitat Disturbance

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