November13thLectureNotes - November 13th Lecture Notes....

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November 13 th Lecture Notes. NOTE: An Audio recording of Dr Greene’s Nov 13 th and Nov 15 th lectures are available for review at 106 Stimson Hall. Since I was in Honduras for this lecture, I will write a supplemental summary of the lecture topics below. If you want to review a record of the actual lecture you will need to go to 106 Stimson Hall between 9AM and 2PM Monday through Friday to listen to the recordings. (ppt) Normal course business. (ppt) Population Ecology - We know populations cannot increase indefinitely; sooner or later population growth slows and populations will reach some kind of equilibrium and some level of stability. What factors regulate populations? A population is a group of organisms of the same species occupying a given space for a given period of time. In ecology, the important populations are those where the individuals that make it up can potentially exchange genetic information (mate). (ppt) This slide summarizes important definitions and concepts about population ecology that you need to know. (ppt SERIES) Population Dispersion - how organisms are distributed in space; there are three basic patterns found in nature: Random - each individual’s position is independent of any other individual. This pattern is rare in nature. It may occur where resources are equally available to all members of the population, where the environment is uniform, and where the interactions between members of the population produces no pattern of avoidance or attraction. Uniform - an even spacing between members of the population; this pattern is often the result of intraspecific competition (competition among members of a species). For example, territorial behavior of some organisms in uniform environments may result in uniform spacing. Another example is found among desert plants; these plants produce compounds that prevent any other plants from germinating near them . Clumped (or clustered)
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This note was uploaded on 10/07/2009 for the course BIO G 109 at Cornell.

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November13thLectureNotes - November 13th Lecture Notes....

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