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This text explores the concept of exponential growth in human populations, explaining how each year the population increases by a greater amount than the previous year, akin to compounding interest. It discusses density-dependent limiting factors, such as resource availability, disease, and space competition, as well as density-independent factors like natural disasters and climate change. The carrying capacity of populations is highlighted, illustrating how certain populations stabilize while others may overshoot and risk extinction. The document also touches on predator-prey dynamics and survivorship curves in relation to global human population growth.
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Exponential Growth • Each year the population grows by a greater amount than the previous year • The human population will add more people this year than it did last year • Like compounding interest in a bank account
Density-Dependent Limiting Factors • Availability of Resources • Space • Disease • Buildup of waste • Predators • War/fighting
Density-Independent Limiting Factors • Natural disasters • Climate change • Human activities
Carrying Capacity • All populations have a maximum population or a carrying capacity • Some populations level off at or around the carrying capacity
Overshooting the Carrying Capacity • Can damage the habitat • Some populations end up lowering their carrying capacity • Others go extinct
