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Chapter 34

Chapter 34. 0. The Biosphere: An Introduction to Earth’s Diverse Environments. A Mysterious Giant of the Deep ~ 1,000 known species of squid until recently, no one knew this “mystery squid”. Deep-sea submersibles. Figure A. Depths up to 2,500 meters!!

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Chapter 34

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  1. Chapter 34 0 The Biosphere: An Introduction to Earth’s Diverse Environments

  2. A Mysterious Giant of the Deep • ~ 1,000 known species of squid • until recently, no one knew this “mystery squid”

  3. Deep-sea submersibles Figure A

  4. Depths up to 2,500 meters!! • new environments, huge variety of organisms Figure B Figure C

  5. What’s Ecology? • scientific study of interactions of organisms with their environments

  6. Figure 34.1 • 34.1Ecologists study how organisms interact with their environment at several levels • Organismal level • Ecologists may examine how 1 kind of organism meets the challenges of its environment

  7. At population level • Ecologists might study factors that limit population size • At community level • An ecologist might focus on interspecies interactions

  8. Ecosystem interactions involve • Living (biotic) communities and • nonliving (abiotic) physical and chemical factors

  9. Figure 34.2A THE BIOSPHERE • 34.2 The biosphere is the total of all of Earth’s ecosystems = “global ecosystem”

  10. Figure 34.2B • Patchiness of the environment • Characterizes the biosphere

  11. CONNECTION • 34.3 Environmental problems reveal limits of the biosphere • Human activities, including widespread use of chemicals • Affect all parts of the biosphere!!

  12. Figure 34.3 • Rachel Carson, famous ecologist • 1 of 1st people to perceive global dangers of pesticide use

  13. Figure 34.4 • 34.4 Physical & chemical factors influence life in biosphere • Abiotic factors determining biosphere’s structure & dynamics ... • Solar energy, water, temperature, wind, and disturbances

  14. Movin On! • But first...some online stuff! • http://wps.aw.com/wps/media/access/Pearson_Default/1976/2024209/login.html

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