Population Dynamics

Two-thirds of the world’s population currently lives on what CONTINENT?
What are the 3 most populous countries in the world?
China, India and the USA (in that order)
Out of all the world’s nations, which one currently produces the MOST: red meat, wheat, rice, nitrogen fertilizer, concrete, steel, solar wafers, gold — and carbon dioxide emissions?
True or False:
More than 300 million children in China are currently studying English.
What is Carrying Capacity (K)
The maximum population of a given species that an ecosystem can support without being degraded in the long run.
The carrying capacity can be exceeded, but not without harming the system’s ability to support that species (and possibly others).
“K” can change: For example, likely to be lower in dry years for many species
What is a Density DE-pendent Population?
Starvation & disease often limit such populations
The greater the population, the greater the effect
This limit is the Carrying Capacity.
Draw the Sigmoid (or S-curve). Label the X and Y axes and indicate where K occurs.
True or False: The global human population is growing at an ever-increasing rate.
False. The RATE of growth of the world’s human population is actually decreasing, even though the total population is still increasing.
Draw a sigmoid population curve and indicate two places on the curve where the growth rate is zero. Indicate the one place on the curve where the growth rate is the highest.