1. CHAPTER 17/18 OUTLINES
What does ecology study? 1. groups of organisms 2. interactions
What are the three levels of ecology? 1. population 2. community 3. ecosystem
What is the biosphere? 1. all life on Earth
What does abiotic mean and what are some of its factors? 1. non-living 2. light, heat, soil, water, air
How are ecology and evolution tightly linked? 1. organisms and environment 2. time-frame: long versus short

2. What is population density and how do we measure it. 1
What is population density and how do we measure it? 1. number per unit area 2. census techniques
What are the three dispersion patterns? 1. clumped 2. uniform 3. random
What are the two types of population growth? 1. exponential 2. logistic
What is carrying capacity? 1. maximum number that can be supported
Why do some populations cycle? 1. predator-prey interaction 2. weather, food availability
What are the three kinds of survivorship curves? 1. Type I; negative aging 2. Type II; neutral aging 3. Type III; positive aging