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SBI 4U Population Dynamics Independent study Unit.docx

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Chemistry 1027A/B
Tom Haffie

SBI 4U Population Dynamics Independent study UnitPart One Characteristics of Population 1The three measurements the scientists use to describe populations are geographic range and population size and density and the dispersion of population2The difference between geographic range and habitat is that the geographic range refers to the total area occupied by a population as opposed to the habitat which refers specifically to a certain environment or location where an organism normally lives For example lions live in Africa so that is there geographic range They live within the boundaries of Africa exception of those in Zoos around the worldAs where the ocean would be classified as a habitat for species like fish because thats where they normally live In conclusion habitat refers to the physical features of the location where an organism lives while the geographic range refers to the geographical locations the majority of the population occupies 3a Population size refers to the number of individuals of a specific species that live in a given area Population density refers to the number of individuals of the same species that occurs per unit area or volume Population size is the actual count where as population density shows where the population is most dense or where a majority of them are locatedb The size of the population is 200 because 200 is the amount of wolves living in the area the formula for calculating population density is DNS which in this case would be D200180001 wolves per hectare Therefore the density in this population is 01 wolveshectaresc The graph in figure 2 on page 585 shows that the increase in body sizes of animals results in the decrease in the number of animals per unit area One reason this is could be expected to be true is that large animals require more space than smaller animals which means that the bigger animals would go to where theres more space and less crowdedness from other animals This results in the decrease in the number of animals per unit are just as the graph represents Another reason is food requirements Bigger animals need more food for themselves and cannot afford to be clustered with others threatening their
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