BIO 103 Lecture Notes - Lecture 9: Industrial Revolution, Demographic Transition, Exponential Growth
11 Apr 2017
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Human population: earth"s human population is 7. 07 billion, un estimates that population will grow to 10. 3 billion by 2050, 854 million people already do not get enough to eat. 55% of childhood mortality is due to poor nutrition. Definitions: ecology = study of the interaction among organisms and between organisms and their environment, population = all the individuals of a species in a given area. Population structure: estimating size of population is the most basic task. Populations can be measured in a variety of ways. Basic census all individuals counted (humans, trees, etc. ) In later trapping, ratio of marked to unmarked individuals used to estimate population size: population dispersion how a population is distributed in space. Clumped high densities in resource-rich areas, low densities elsewhere. Uniform spacing between individuals tends to be equal. Random no compelling feature pushing individuals together or apart. Overview: archaeologists have been able to estimate the size of human population to about 10,000 years ago.
