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Ecosystems Lesson I
 

Ecosystems Lesson I

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Intro to Ecosystems

Intro to Ecosystems

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    Ecosystems Lesson I Ecosystems Lesson I Presentation Transcript

    • Ecosystems
    • All will be able identify different ecosystems Most will be able to describe the Ecosystem pattern of distribution around the world Some will be able to investigate the characteristics and distribution of a major biome Pupils to choose where they feel they can get to!
    • Some Keywords
      • attitudes,
      • biome,
      • climate,
      • distribution,
      • ecosystem,
      • enquiry,
      • environment,
      • facts,
      • natural resources,
      • opinions,
      • permafrost,
      • vegetation
      • In pairs, use your skills of interpretation to describe and draw the distribution of the worlds main ecosystems
      • Use your Geographical terms to describe where the different ecosystems are i.e. North, South and countries names!
      Starter You are not allowed to use the terms: Over there, Top, Bottom, Left, Right!
    •  
    •  
    • What is an ecosystem?
      • An ecosystem is a community of living organisms (plants and animals) sharing an environment. The largest ecosystems are called biomes.
      • What is a biome?
      • A biome is a very large ecosystem e.g. Tropical Rainforest. The next map shows 9 of the world's main biomes.
    • What is a biome?
      • A biome is a very large ecosystem e.g. Tropical Rainforest. The next map shows 9 of the world's main biomes.
      • Copy into books
    • Biomes
    • http://www.camstreams.com/scenerywebcams.asp Newfoundland: Canada: Tundra Botswana: Grassland Savannah Times Square: Temperate Deciduous
    • Copy this table ready to take notes on the different ecosystems Note down the characteristics of each ecosystems as we look at the images. Area Main Vegetation Average Rainfall Average Temp. Name
    •  
      • The image above shows a typical cross section in the rainforest.
      • Emergents are the tallest trees and are usually over 50 metres tall. The Kapok tree is an example of an emergent.
      • The sea of leaves blocking out the sun from the lower layers is called the canopy . The canopy contains over 50% of the rainforest wildlife. This includes birds, snakes and monkeys. Lianas (vines) climb to the canopy to reach this sun light.
      • The under canopy mainly contains bare tree trunks and lianas.
      • The shrub layer has the densest plant growth. It contains shrubs and ferns and other plants needing less light. Saplings of emergents and canopy trees can also be found here.
      • The forest floor is usually dark and damp. It contains a layer of rotting leaves and dead animals called litter. This decomposes rapidly (within 6 weeks) to form a thin humus, rich in nutrients.
    • Tundra Tundra is found in the extreme North of Canada and Asia . -12ºC to -6ºC Average Temperature Hardly any rainfall
    • Deciduous Forest Biome The average annual temperature in a deciduous forest is 50° F. The average rainfall is 30 to 60 inches a year Found in Europe, North America and Asia
    • Rainforest Nearly 80 degrees all year round 400-1000 cm of rain each year Found around the Equator
    • Desert less than 25cm of rainfall a year rare clouds little rain very hot days very cold nights 20-25° C mean average temp 43.5-49° C extreme temps
    • Savannah Grassland Central Africa (Kenya), America and The North and East of South America (Brazil). 100 and 400 mm a year 15-25 degrees C
    • Mountains 12 degrees Celsius to 10 degrees Celsius The average precipitation is 30 cm a year. Found in parts of North America and Central Asia
    • Coniferous (Taiga) 10° C. 20-40 inches Parts of Canada and Russia