Chapter 6: Biomes and Aquatic Ecosystems - PowerPoint PPT Presentation

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Chapter 6: Biomes and Aquatic Ecosystems

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Chapter 6: Biomes and Aquatic Ecosystems
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Chapter 6: Biomes and Aquatic Ecosystems

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  1. Chapter 6: Biomes and Aquatic Ecosystems Notes Can Also Be Found at www.manskopf.com

  2. Chapter 6 Notes Goal • Explain what biomes and aquatic ecosystems are • Explain how biomes are characterized. • Describe how net primary productivity varies among biomes. • Give an introduction to your Biome Project • Give an example of your Biome Project

  3. What are the differences?Climate, Biology, Limiting Factors, Adaptations?

  4. Things Change? • Fossil evidence suggests that the frozen continent of Antarctica was once covered in temperate forest.

  5. Earth’s Biomes • Groups of terrestrial ecosystems that share biotic and abiotic conditions • 10 primary biomes: • tropical rain forest • dry forest savanna • desert • temperate rain forest • temperate forest • temperate grassland • chaparral • boreal forest • tundra

  6. La Mesa, CA

  7. Philadelphia

  8. Climate: Average conditions, including temperature and precipitation, over long periods of time in a given area • Weather: Day-to-day conditions in Earth’s atmosphere • Climatographs: Diagrams that summarize an area’s average monthly temperature and precipitation • Each biome has a set of characteristic organisms adapted to its particular climate conditions.

  9. Across the U.S.

  10. Productivity • Net primary production: The amount of organic matter (biomass) that remains after primary producers use some to carry out cellular respiration • Ecosystems vary in their net primary productivity, the rate at which primary producers convert energy to biomass. • Warm, wet biomes generally have higher net primary productivity than cold, dry biomes.

  11. Earth’s productivity: On land forests are highly productive in dark green, deserts least in brown. At sea, red indicates high productivity and deep oceans dark blue.

  12. Aquatic Ecosystems (Wet Biomes) • 75% of Earth’s surface is covered by water.

  13. Salinity: the amount of dissolved salt present in water. Ecosystems are classified as salt water, fresh water, or brackish depending on salinity. • Photosynthesis tends to be limited by light availability, which is a function of depth and water clarity. • Aquatic ecosystems are either flowing or standing. • Aquatic ecosystem zones: photic, aphotic, benthic

  14. Aquatic Ecosystem Limiting Factors • Limiting factors may include: • Salinity • Ph • Sunlight • Dissolved oxygen • Temperature

  15. Freshwater Ecosystems: Ponds, Lakes, Inland Seas Salinity is less than 0.5 ppt (parts per thousand)

  16. Freshwater Ecosystems: Wetlands • Areas of land flooded with water at least part of the year • Include freshwater marshes, swamps, bogs, and fens

  17. Freshwater Ecosystems: Rivers and Streams Bodies of surface water that flow downhill, eventually reaching an ocean or inland sea Delaware Water Gap

  18. Estuaries • Occur where a river flows into the ocean or an inland sea • Coastal estuaries are brackish ecosystems; organisms must tolerate wide salinity and temperature ranges. • Coastal estuaries are home to salt marshes and mangrove forests.

  19. Oceans • Intertidal Areas • Neritic Zones • Open Ocean

  20. Chapter 6 Review • Explain what biomes and aquatic ecosystems are • Explain how biomes are characterized. • Describe how net primary productivity varies among biomes. • Give an introduction to your Biome Project • Give an example of your Biome Project

  21. Biome Project Online http://www.manskopf.com/yahoo_site_admin/assets/docs/BiomesProject.230105729.doc

  22. Biome Project PowerPoint Example • Temperate Rain Forest • JUST AN EXAMPLE – 2-5 minutes • Remember 60% for information • Also found at www.manskopf.com

  23. Temperate Rain Forest For Mr. Manskopf Environmental Science Class By Mr. Manskopf November 2011

  24. Temperate Rainforest…Where on Earth? • Small Biomes in Area • Small Pockets Around World

  25. Temperate Rain Forests Locations • Mid-Latitudes • Usually near coastline • Largest found in Pacific Northwest of U.S. and British Columbia in Canada

  26. Climate of the Temperate Rain Forest • WET, Year Round Rain • Moderate Temperatures

  27. Why is it wet year round?

  28. Species Found In Temperate Rain Forest TREES: • Cedars, Spruce, Hemlock, Douglas Fir • Grow Tall/Fast • Evergreens • Coniferous Trees (seed-bearing cones) • Compete for sunlight • Commercially important

  29. Species Found In Temperate Rain Forest • Damp conditions perfect for moss • Slugs • Numerous amphibian creatures • Squirrels • Deer • Elk

  30. Species Found In Temperate Rain Forest Limiting Factors • Sunlight • Too much precipitation (Precipitation in Olympic's rain forest ranges from 140 to 167 inches (12 to 14 feet) every year.)

  31. Threats • Timber/Logging

  32. Example Hoh Rain Forest http://www.nps.gov/olym/naturescience/temperate-rain-forests.htm

  33. Temperate Rain ForestCites • http://www.nps.gov/olym/naturescience/temperate-rain-forests.htm • https://biomesfirst09.wikispaces.com/Temperate+Rainforest+Home • http://www.marietta.edu/~biol/biomes/temprain.htm