GROUP 2
GROUP 2
GROUP 2 & 3
GROUP 3
GROUP 3
100
the branch of biology that deals with the numbers of a particular species found in an area and why those numbers change over time.
What is Population Ecology?
100
Emigration
What is the term known as the movement of individuals out of a population?
100
as of 2010: 6.9 billion
What is the current size of the human population?
100
r = (b-d) + (i-e)
What is the equation for population growth
100
Population density
What do biologists measure when a sample of ocean water has 10 million phytoplankton per cubic meter of seawater?
200
the number of individuals of a individuals in a species per unit of area or volume at a given time
What is Population Density?
200
Large organisms because larger organisms take up more space therefore there will be less large organisms in a particular area
Would larger or small organisms have the lowest intrinsic rate of increase?
200
unlimited population growth
What kind of growth would a population with unlimited food and no mortality show?
200
birth rate equal to death rate in high developed countries
What is replacement-level fertility in highly developed countries?
200
Hunger, stagnated population growth, health issues
What are problems with overpopulation?
300
Birth rate, death rate, area, immigration, and emigration
What factors can affect Population Density?
300
Maximized chance of survival when the number of individuals is near the carrying capacity of the environment they don't produce lare numbers of offspring, long life spans and slow development, late and low reproduction, large body size. Animals invest in care of young and generally K characteristics found in stable or constant environments with competitive abilities
What are features of K-selected species
300
The most complex organism and at the top of the pyramid.
Why does the gull have the highest concentration of DDT is because it is:
300
20 years
When is the expected food shortage supposed to occur? 5 million ppl and every 10 years the pop. doubles. The island can only support 20mil
300
exponential growth can't continue forever
What is environmental resistance?
400
Carrying Capacity
What is the maximum number of individuals of a given species that a particular environment can hold for an indefinite period of time?
400
Lemmings--small rodents, undergo dramatic increases and then crash
What species is characterized by a boom or bust cycle?
400
38% of the adult population of Swaziland have AIDS. AIDS has slowed economic growth and increased infant mortality and hurting Africa's population growth
What can you tell about HIV/AIDS
400
by toxicologists
How are carcinogens studied?
400
when carrying capacity is reached and leads to population crash
What is overshooting/overextending?
500
Thomas Malthus
Who was the first scientist who sounded the alarm about population growth and the ability of the world to handle a large population of humans
500
Weather events
What is an example of density-independent factor affecting population growth
500
Nigeria
What country is represented by an age structure shaped like a pyramid.
500
short life spans/early death/high reproduction rates
What features are typical of r-selected species?
500
Increase economic development (chinese so much smarter... technological innovation) Straining economic development (US hicktown ppl who can't spell welfare)
What are two opinions on rapid population growth?
M
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