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CHAPTER 19 OUTLINE

CHAPTER 19 OUTLINE. What is a community? 1. assemblage of populations 2. different species What are the two components of community diversity? 1. species richness 2. species evenness Food chain or food web? 1. trophic structure

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CHAPTER 19 OUTLINE

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  1. CHAPTER 19 OUTLINE • What is a community?1. assemblage of populations2. different species • What are the two components of community diversity?1. species richness2. species evenness • Food chain or food web?1. trophic structure • What does interspecific refer to? intraspecific?1. between species2. within species • Why do species compete? over what?1. limited resources2. food, water, habitat, mates • What is a niche? What does the competitive exclusion principle say?1. all the resources a species requires or can use2. two species cannot coexist if their niches are identical

  2. How is a predator different from a parasite?1. kill versus feed • What are passive defenses? active defenses?1. hiding2. escaping or defending • What is mutualism?1. symbiotic, mutually beneficial • What is succession?1. disturbance response2. stability, change • What is trophic structure?1. food webs, energy flow • Which chemicals cycle through an ecosystem?1. carbon, nitrogen, phosphorus • What are biomes?1. terrestrial, aquatic, marine ecosystems2. cover a large geographic area

  3. HUMAN IMPACT • What is the #1 cause of species extinction? #2?1. habitat destruction2. introduced species • What is global warming? what causes it?1. greenhouse effect, rapid warming2. greenhouse gases like carbon dioxide • What impact does too much nitrogen/phosphate have in an ecosystem?1. causes an algal bloom2. kills aquatic/marine ecosystem3. too much of a good thing • What is the water cycle?1. clouds2. rain3. groundwater4. trees, transpiration

  4. What is biological magnification? 1. toxic concentration up a food chain • What damaged the ozone layer? how?1. CFCs (chlorofluorocarbons)2. refrigeration, aerosols • Why are current species extinctions of concern?1. faster rate than in the past • What is the #3 cause of species extinction? why do we need biodiversity?1. overexploitation2. food, clothing, medicine • What is conservation biology?1. goal-oriented science that seeks and implements solutions • What are hot spots? endemics?1. areas of very high-quality habitat2. species that occur only in one place • What is sustainable development?1. balancing ecology and economy, needs of man and nature

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