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Local Conditions

Interest Grabber. Section 4-1. Local Conditions. How would you describe your climate, or the average, year-after-year conditions of temperature and precipitation where you live? Does your area receive a great deal of precipitation—rain and snow—or is your area very dry?.

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Local Conditions

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  1. Interest Grabber Section 4-1 Local Conditions • How would you describe your climate, or the average, year-after-year conditions of temperature and precipitation where you live? Does your area receive a great deal of precipitation—rain and snow—or is your area very dry?

  2. Interest Grabber continued Section 4-1 • 1. When does the area in which you live experience the lowest temperatures? Does the temperature ever get below freezing? If so, how often does this occur? • 2. When does the area in which you live have the highest temperatures? About how high is the highest temperature? • 3. How often does it rain where you live? Is one season rainier than the others? • 4. Does it ever snow where you live? If so, what is the heaviest snowfall you can remember? • 5. What are two factors that may affect climate?

  3. Section Outline Section 4-1 • 4–1 The Role of Climate A. What Is Climate? B. The Greenhouse Effect C. The Effect of Latitude on Climate D. Heat Transport in the Biosphere

  4. The Greenhouse Effect Section 4-1 Sunlight Some heat escapes into space Greenhouse gases trap some heat Atmosphere Earth’s surface

  5. Figures 4-1 and 4-2 Heating of the Earth’s Surface and Some Factors That Affect Climate Section 4-1 Greenhouse Effect Different Latitudes 90°N North Pole Sunlight Sunlight 66.5°N Arctic circle Some heat escapes into space Sunlight Tropic of Cancer 23.5°N Equator Most direct sunlight 0° Greenhouse gases trap some heat Tropic of Capricorn 23.5°S Sunlight Atmosphere Arctic circle 66.5°S Sunlight Earth’s surface 90°S South Pole

  6. Interest Grabber Section 4-2 Fitting In • Organisms not only live together in ecological communities, but they also constantly interact with one another. These interactions, which include predation and competition, help shape the ecosystem in which they live. • 1. Based on your own experiences, define predation. Give one example of predation. • 2. Based on your own experiences, define competition. Give one example of competition.

  7. Section Outline Section 4-2 • 4–2 What Shapes an Ecosystem? A. Biotic and Abiotic Factors B. The Niche C. Community Interactions 1. Competition 2. Predation 3. Symbiosis D. Ecological Succession 1. Primary Succession 2. Secondary Succession 3. Succession in a Marine Ecosystem

  8. Abiotic and Biotic Factors Section 4-2 Abiotic Factors Biotic Factors ECOSYSTEM

  9. Abiotic and Biotic Factors Section 4-2 Abiotic Factors Biotic Factors ECOSYSTEM

  10. Figure 4-5 Three Species of Warblers and Their Niches Section 4-2 Cape May Warbler Feeds at the tips of branches near the top of the tree Bay-Breasted Warbler Feeds in the middle part of the tree Yellow-Rumped Warbler Feeds in the lower part of the tree and at the bases of the middle branches Spruce tree

  11. Interest Grabber Section 4-3 Who’s There? • If you have ever been to a zoo or a botanical garden, you may have noticed that the signs that identify the animals or plants also identify the part of the world where these organisms are found. Different kinds of animals and plants are found in different parts of the world.

  12. Interest Grabber continued Section 4-3 • 1. Describe the climate where you live. • 2. What types of plant and animal life are found in your area? Describe a few of the major characteristics of these organisms. • 3. Suppose that you had to move to an area with a climate that was very different from the climate you now live in. How would the plant and animal life in this new area be different from the plant and animal life where you live now?

  13. Section Outline Section 4-3 • 4–3 Biomes A. Biomes and Climate B. The Major Biomes C. Other Land Areas 1. Mountain Ranges 2. Polar Ice Caps

  14. Compare/Contrast Table Section 4-3

  15. Figure 4-11 The World’s Major Land Biomes Section 4-3 Temperate grassland Tropical rain forest Temperate forest Tundra Northwestern coniferous forest Mountains and ice caps Tropical dry forest Desert Temperate woodland and shrubland Tropical savanna Boreal forest (Taiga)

  16. Interest Grabber Section 4-4 Ride the Waves • The marine ecosystem that is exposed to regular and extreme changes in • its surroundings is the intertidal zone. During high tide, the intertidal zone • is covered by sea water. During low tide, this area is exposed to air, sunlight, and heat.

  17. Interest Grabber continued Section 4-4 • 1. What types of organisms would you expect to find living in the intertidal zone? • 2. What characteristics do you think these organisms have that enable them to live in this zone? • 3. What effect do waves have on the intertidal zone?

  18. Section Outline Section 4-4 • 4–4 Aquatic Ecosystems A. Freshwater Ecosystems 1. Flowing-Water Ecosystems 2. Standing-Water Ecosystems 3. Freshwater Wetlands B. Estuaries C. Marine Ecosystems 1. Intertidal Zone 2. Coastal Ocean 3. Coral Reefs 4. Open Ocean 5. Benthic Zone

  19. The shore is lined with grasses that provide shelter and nesting places for birds and other organisms. Frogs lay eggs in the shallow water near shore.The eggs hatch in the water as tadpoles and move to the land as adults. The roots of water lilies cling to the pond bottom, while their leaves, on long flexible stems, float on the surface. Plankton and the organisms that feed on them live near the surface where there is enough sunlight for photosynthesis. Microscopic algae are among the most important producers. Fish share the pond with turtles and other animals. Many of them feed on insects at the water’s edge. The bottom of the pond is inhabited by decomposers and other organisms that feed on particles drifting down from the surface. Freshwater Pond Ecosystem Section 4-4 Spoonbill Duck Water lilies Frog Dragonfly Mosquito larvae Duckweed Phytoplankton Snail Pickerel Diving beetle Trout Hydra Crayfish Benthic crustaceans Snail

  20. Figure 4-17 Zones of a Marine Ecosystem Section 4-4 land Photic zone 200m 1000m Coastal ocean 4000m Aphotic zone Open ocean 6000m Ocean trench 10,000m Continental shelf Continental slope and continental rise Abyssal plain

  21. Videos Video Contents • Click a hyperlink to choose a video. • Earth’s Many Biomes, Part 1 • Earth’s Many Biomes, Part 2

  22. Video 1 Video 1 Earth’s Many Biomes, Part 1 • Click the image to play the video segment.

  23. Video 2 Video 2 Earth’s Many Biomes, Part 2 Click the image to play the video segment.

  24. Go Online Internet • Career links on forestry technicians • Interactive test • For links on climate and the greenhouse effect, go to www.SciLinks.org and enter the Web Code as follows: cbn-2041. • For links on biomes, go to www.SciLinks.org and enter the Web Code as follows: cbn-2043. • For links on aquatic ecosystems, go to www.SciLinks.org and enter the Web Code as follows: cbn-2044.

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