BI103 HW #7 - In the survey of Ecology & Evolution, each week there are mandatory homework PDF

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In the survey of Ecology & Evolution, each week there are mandatory homework assignments due from readings. This is an example of an assignment that received full points....

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Hunt 1

Ian Hunt Mitchell BI103A-03 5/1/17 Homework 7: Communities

1. What is “BBECPO”? Biosphere, Biome, Ecosystem, Community, Population, Organism

2. How does one describe a community? A population that interacts 3. What is species diversity? How does it vary from equator to poles? Species diversity is the total number of different species within a population. It is stagnant at the equator, peaks near rainforests, and declines near the poles. 4. Explain each of these interactions: Symbiosis (mutualism), Parasitism, Competition, Predator-Prey? Symbiosis: Living together Parasitism: One organism is harming another Competition: two organisms are competing Predator-prey: A relationship in which one organism is the prey or predator 5. Leafcutter ants feed fungus: What kind of relationship is this? Mutualism 6. Why is population growth exponential, rather than arithmetic? When resources are unlimited, populations exhibit exponential growth, resulting in a Jshaped curve. When resources are limited, populations exhibit logistic growth. In logistic growth, population expansion decreases as resources become scarce. 7. What can limit population growth? Running out of food, space, disease outbreak. Natural disasters. Density independent and density dependent factors

Hunt 2

8. What is the difference between density-dependent and density-dependent limits? Density-dependent limits are limits that are directly due to population size (i.e. food, space, disease, etc...). Density-independent limits are limits that are not directly related to population size (i.e. natural disasters, chance). 9. What is Carrying Capacity? Carrying capacity is the maximum number of organisms an area can support....