Lecture 7 Flashcards
How do humans impact the ecosystem?
1) By Introducing new species
2) By removing a species
3) By introducing parasites
What is the Earths number one threat?
Human population
What happened on the island of St. Matthew
During the World War they built a radar station, because of the small and isolated location they brought 29 reindeer to the island for the workers to shoot
What happened to the reindeer of St. Matthew Island after the workers left?
The numbers skyrocketed and then crashed as the reindeer had no natural predators so they reproduced strongly and then depleted the island of resources and eventually they all died of stravation
What is the current population of the world?
7.6 Billion
Is the world population evenly distributed ?
NO
How many people live in more developed countries?
1.26 billion
How many people live in less developed countries?
6.35 Billion
What is the current rate of natural increase of population for the world?
1.2%
In most cases, around the world is the rate of natural increase, increasing or decreasing compared to 1997
Decreasing
To date, how many generations of people have there been?
Around 2500
Rich countries have _____ to ____ Natural population increase
low to no
When did the world population hit 1 billion
1850
When did the world population hit 2 billion
1930
When did the world population hit 3 billion
1957
