BCOR 12 1st Edition Lecture 22 Outline of Last Lecture I Exponential Growth Model II Logistic Growth Model III Life History Traits IV Correlating Life History Traits with Population Density V Human Population Outline of Current Lecture I Major Life History Traits Repeated II Human Population cont III Critical Perspective Questions IV Community Ecology Beginning of Chapter 54 V Intra and Interspecific interactions Current Lecture Three Major Life History Traits Repeated I II III When reproduction begins at what age How the organism reproduce sexually or asexually How many offspring are produced The population density and the carrying capacity of the population can affect the traits listed above Density independent factors do NOT affect carrying capacity Human 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 number o An average person should only use 4 acres based on the ecological footprint number o The average American uses 25 acres Critical Perspective Questions Dr 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 II What can we do to change our behavior and environment to create a positive future 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 interactions Intra and Interspecific Interactions Intraspecific interaction within a species Interspecific interaction between species Types of possible interactions I II III IV Competition a Both inter and intraspecific interactions can occur Predation a Interspecific Herbivory a Intra and interspecific Symbiosis organisms of two different species living together in direct and intimate contact a Parasitism one organism benefits while the other is negatively effected b Mutualism both organisms benefit c Interspecific
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