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Blue Marble Photograph p. 6

Blue Marble Photograph p. 6. Chapter 1: Biomes & ecosystems are divisions of the biosphere 1.1 Biomes. By the end of section 1.1 you should be able to understand the following: A biome is the largest division of the biosphere.

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Blue Marble Photograph p. 6

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  1. Blue Marble Photograph p. 6

  2. Chapter 1: Biomes & ecosystems are divisions of the biosphere 1.1 Biomes By the end of section 1.1 you should be able to understand the following: • A biome is the largest division of the biosphere. • Large regions within biomes have similar biotic and abiotic components. The interaction of these components determine the characteristics of the biome. • Temperature and precipitation are the most influential abiotic factors on biomes. • Organisms have adaptations for survival in the specific environmental conditions of their biome.

  3. Chapter 1: Biomes & ecosystems are divisions of the biosphere 1.1 Biomes • Biomes are regions with similar biotic (living) & abiotic (non-living) components (ex. BC & New Zealand are similar biomes)

  4. Classification of Biomes • Biomes are classified based on many characteristics: water availability, temperature & interactions between biotic & abiotic factors. • There are 8biomes on Earth: Boreal forest, desert, grassland, permanent ice, temperate deciduous forest, temperate rainforest, tropical rainforest and tundra.

  5. Distribution of Biomes • Temperature & precipitation are 2 of the most important abiotic factors in identifying biomes. • P. 13

  6. Distribution of Biomes

  7. Other identifying factors include: • Latitudeinfluences both temp. & precipitation. Ex. The tropical zone has very warm temp. & high Precip. Because the sun shines straight down & warm air holds more moisture than cooler air. • Elevationis the height above sea level • Higher elevations have less air, & therefore less heat is retained. • Windward sides of mountains are wet, leeward sides are very dry. • Ocean currents carry warmth & moisture to coastal areas. • Where warm currents meet land, temperate biomes are found.

  8. Climatographs • Climate: the average pattern of weather conditions over a period of several years. • A climatograph shows the average temperature & precipitation for a location over a period of 30+ years. • Climatographs show • the precipitation on the left hand y-axis, • temperature on the right hand y-axis • time along the x-axis (bottom)

  9. Climatographs

  10. Adaptations & Biomes • Biomes are often identified with biotic factors. • Eg. a cactus in the desert, or a caribou on the tundra. • Many of these characteristic factors have special adaptations that allow the organisms to better survive & reproduce in that biome.

  11. Types of adaptations: • Structural adaptation - a physical feature • that helps an organism survive. • ex. A wolf has large paws to help it • run in snow. • Physiological adaptation - a physical or chemical event inside the body of an organism that allows it to survive. • ex. A wolf maintains a constant body temperature. • 3. Behavioural adaptation - a behaviour that helps an organism to survive. • ex. Wolves hunt in packs to capture large prey. Take the Section 1.1 Quiz

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