Vocab
Biotic & abiotic
Dramatic change from high birth/death rates to low birth/death rates.
Demographic transition
Trend in population occurring during step 2 of demographic transition model.
Death rate is decreasing, so population increasing.
Greenhouse gasses trap heat in Earth's atmosphere and increase the temperature of the Earth.
The four ways ecologists study & describe populations.
1. Geographic range
2. Density & distribution
3. Age structure
4. Growth rate
Density independent limiting factor
Happens to all populations regardless of size or density.
Factors of climate change.
Changes in temperature, clouds, wind, patterns and amounts of precipitation & the frequency and severity of extreme weather events.
Large populations grow faster.
Cannot continue indefinitely.
Has no limits
J- shaped curve
Exponential growth
**The three climate zones represented in the image.**
1. Polar
2. Temperate
3. Tropical
The four factors that affect population growth.
1. Birth rate
2. Death rate
3. Immigration
4. Emigration
Density dependent limiting factor.
Operate more strongly when population density is high.
Impact of carrying capacity falling too low.
Populations can be wiped out, leading to species extinction.
Stabilized at carrying capacity
Could continue indefinitely
Limited by density dependent factors
S-shaped curve
Logistic growth
The two ocean zones based on depth & the biological process that takes place in the 1st zone.
1. Photic - Photosynthesis
2. Aphotic
Two types of density independent limiting factors.
1. Extreme weather
2. Natural disasters
Patterns and averages of temperature, precipitation, clouds, wind, and extreme weather events over many years.
Climate
Factors used to describe biomes.
Abiotic- climate & soil type
Biotic- plant & animal life
The trend of the populations on the graph.
Increasing and decreasing over time.
Three ocean zones based on distance from land & the most productive zone.
1. Intertidal zone
2. Costal zone- Most productive
3. Open ocean
Four types of density dependent limiting factors.
1. Competition
2. Parasitism & disease
3. Stress from overcrowding
4. Predation & herbivory
Human altered biomes & where they can be found.
Anthromes
Everywhere- they have replaced most natural biomes.
Historical growth pattern of the human population.
Human populations tend to increase, and our population growth rate has changed over time.
The description of the climate data & the name of the biome it belongs to.
Low annual precipitation & seasonal changes in temperature.
The way climate change causing rising sea levels will impact human activity.
The use of sea walls and water pumps.
More young people in pop. = Increasing pop.
More older people in pop. = Decreasing pop.