BCOR 12 1st Edition Lecture 22Outline of Last Lecture I. Exponential Growth ModelII. Logistic Growth ModelIII. Life History TraitsIV. Correlating Life History Traits with Population DensityV. Human PopulationOutline of Current Lecture I. Major Life History Traits RepeatedII. Human Population cont.III. Critical Perspective QuestionsIV. Community Ecology – Beginning of Chapter 54V. Intra- and Interspecific interactionsCurrent LectureThree Major Life History Traits RepeatedI. When reproduction begins (at what age)II. How the organism reproduce (sexually or asexually)III. How many offspring are producedThe population density and the carrying capacity of the population can affect the traits listed above.- Density-independent factors do NOT affect carrying capacityHuman Population cont. - Fundamental problem = populations overstretch their resources limitations- Ecological footprint = the aggravated land and water area required by a person, city, or nation to produce all of the resources it consumes and to absorb all of the waste it generates- An average American uses over 300 Gigajoules of energy a year while a 100 Watt light bulb left on for a year only uses 3. - Estimated the ecological footprint can be done by:These notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.o Adding all of the ecologically productive land on the planet and dividing by the population numbero An average person should only use 4 acres based on the ecological footprint numbero The average American uses 25 acresCritical Perspective QuestionsDr. Hill says these may be on the next exam and she suggests thinking and answering these questions before hand and during study time come exam time. I. What can we do to change our behavior and environment to create a positive future?II. Knowing our behavior and patterns, how can we best shape our actions so that the consequences of our activites to be positive and purposeful?Chapter 54 – Community Ecology- Community = assemblage of populations of different species living close enough together for potential interactionsIntra- and Interspecific Interactions- Intraspecific interaction = within a species- Interspecific interaction = between speciesTypes of possible interactions:I. Competitiona. Both inter- and intraspecific interactions can occurII. Predationa. InterspecificIII. Herbivorya. Intra- and interspecificIV. Symbiosis: organisms of two different species living together in direct and intimate contact.a. Parasitism = one organism benefits while the other is negatively effectedb. Mutualism = both organisms benefitc.
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