BIOB50H3 Lecture 7: Lecture 7-8 Notes.pdf
Document Summary
You have to understand how population change over time. Very recently, human population has exploded in size. The reason for this has to do with technological innovations, industrial revolution, modern medicine, etc. However, the bubonic plague caused a greater decrease in population. In 1975, the population was growing at an annual rate of nearly 2%. At this rate, a population will double in size every 35 years. If this growth rate were sustained, we would reach 32 billion by 2080. But growth rate has slowed recently, to about 1. 21% per year. If this rate is maintained, there would be roughly 16 billion people on earth in 2080. One of the ecological maxims is: no population can increase in size forever . Through maybe, women waiting longer to reproduce, women getting more educated. Life tables show how survival and reproductive rates vary with age, size, or life cycle ages.
