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Ecology Review II Supplemental Instruction Iowa State University Leader: Course: Instructor: Date: 1. Matching: ____ Negative intraspecific interactions ____ Positive intraspecific interactions ____ No strong intraspecific interactions Jenny Biology 211 Roe Monday, April 27, 2009 A. Random distribution B. Uniform distribution C. Clumped distribution 2. Compare the terms paired together in each row: Biotic factors Abiotic factors Anagenesis Cladogenesis Prezygotic Barriers Postzygotic Barriers Allopatric speciation Sympatric speciation Logistic Growth Model Exponential growth model Small-population approach Declining-population approach Density-dependent factors Density-independent factors Food chain Food web Intraspecific Interactions Interspecific interactions Ecosystem characteristics with high NPP Ecosystem characteristics with low NPP Semelparous Iteroparous 3. Define the following terms: organism, population, community, and ecosystem. -organism: -population: -community: -ecosystem: 4. Mark and recapture problem: Suppose that you capture 10 individuals of a rare subspecies of brook trout from an impounded watershed. You place a pit tag (a very small radio activated tag) in the body cavity of each individual and then release these fish. You come back a month later and capture 20 fish and find that four of these are individuals that you had previously captured and released. What is your best estimate of the population size, N? 5. Density problem: What is the density of a population if there are 100 individuals in an area that is 100 m2? 6. Rate of increase problem: What would the change in population be given the following scenario? Is the population growing or declining? .. 600 squirrels are born in a population and 400 squirrels in the same population die. Additionally, 100 squirrels immigrate into the area and 150 squirrels emigrate from the population. 7. Survivorship Curves- Describe each type: I: II: II 8. What is the competitive exclusion principle? 9. Logistic growth model math problem: Look on the board. 10. What are the effects of increasing CO2 levels? 11. What is a keystone species? 12. Describe the extinction vortex and how it can lead to the extinction of a small species. 13. Why is there so much plant biomass if there are herbivores? 14. Description of water cycle: 15. Description of carbon cycle: Quiz questions: 16. Which of the following are important biotic factors that affect the structure and organization of biotic communities? A) precipitation, wind B) Nutrient availablity, soil pH C) predation, competition D) temperature, water E) Light intensity, seasonality 17. The main reason polar regions are cooler than the equator is because A) There is more ice at the poles B) Sunlight strikes the poles at a lower angle C) The poles are farther from the sun D) The atmosphere is thicker at the poles E) The poles are permanently tilted away from the sun 18. Uniform spacing patterns observed in plants like the creosote bush are most often associated with A) chance B) Patterns of humidity C) Random distribution of seeds D) Competitive interactions among individuals E) The concentration of nutrients 19. Which of the following describes having more than one reproductive episode during a lifetime? A) cohort B) dispersion C) iteroparous D) semelparous E) competition 20. According to the competitive exclusion principle, two species cannot continue to occupy the same A) habitat B) niche C) territory D) range E) biome