Upload
raphael-delacruz
View
36
Download
4
Tags:
Embed Size (px)
DESCRIPTION
Chapter 35 - Populations. Populations. Can change over time Must determine the limits of an area Population Density - Ex - _________________________, or _____________________________________________. Question. What would rather receive? $1000 per day for a month - PowerPoint PPT Presentation
Citation preview
Chapter 35 - Populations
Populations
Can change over timeMust determine the limits of an area
Population Density -
Ex - _________________________, or _____________________________________________
Can change over timeMust determine the limits of an area
Population Density -
Ex - _________________________, or _____________________________________________
Question
What would rather receive?$1000 per day for a month1 penny to start with and then double it each
day for a month
What would rather receive?$1000 per day for a month1 penny to start with and then double it each
day for a month
How fast can a population go? How big can a population get?A group of animals can have
______________ __________________ - which means they do the same thing as the penny example
PROBLEM -
A group of animals can have ______________ __________________ - which means they do the same thing as the penny example
PROBLEM -
What keeps a population under control?Limiting factors -
Examples:Carrying capacity -
# of births = # of deaths so the population won’t get any larger
Limiting factors -
Examples:Carrying capacity -
# of births = # of deaths so the population won’t get any larger
Carrying Capacity
QuickTime™ and aTIFF (Uncompressed) decompressor
are needed to see this picture.
Factors affecting Population GrowthDensity dependent factors -
Food - more food = Disease -
Ex - Chronic Wasting disease in deer =
Density dependent factors -
Food - more food = Disease -
Ex - Chronic Wasting disease in deer =
Factors affecting Population GrowthDensity Independent Factors -
Weather Floods
Density Independent Factors -
Weather Floods
Species Interaction
When 2 species compete with each other for a particular resource - ______________ ___________________
When 2 species compete with each other for a particular resource - ______________ ___________________
Niches
Each animal in a community has its special role
Each animal in a community has its special role
Predation
Predator -Examples:
Prey -
Examples:
Predator -Examples:
Prey -
Examples:
Predator Adaptations
Predators must be “smart” enough to catch their preyCamouflage - _______________ - wolves
Predators must be “smart” enough to catch their preyCamouflage - _______________ - wolves
Prey Adaptations
Prey wants to avoid being eatenCamouflage -
“Warning coloration” -
Mimicry -
Plants -
Prey wants to avoid being eatenCamouflage -
“Warning coloration” -
Mimicry -
Plants -
Symbiotic Relationship
When _____ organisms live in or on each other
3 types symbiotic relationshipsParasitismMutualismCommensalism
When _____ organisms live in or on each other
3 types symbiotic relationshipsParasitismMutualismCommensalism
Parasitism
1 organisms benefits (________), 1 organism suffers (_________)
Usually the _____________ is smaller than the host
Examples :
1 organisms benefits (________), 1 organism suffers (_________)
Usually the _____________ is smaller than the host
Examples :
Mutualism
Both organisms benefit from the situationExamples:
Both organisms benefit from the situationExamples:
Commensalism
1 organism benefits, the other doesn’t care Examples
1 organism benefits, the other doesn’t care Examples
Disturbances to a Community
Major, sudden changes are called ____________
Natural disturbances -
_________________ - clearing a forest to grow crops, a ship sinking to the ocean floor
Major, sudden changes are called ____________
Natural disturbances -
_________________ - clearing a forest to grow crops, a ship sinking to the ocean floor
Ecological Succession
__________________ - 1st step - small mosses begin to grow on rock and forms the first soils
___________________ - When a disturbance damages a community, but the soil is still there
__________________ - 1st step - small mosses begin to grow on rock and forms the first soils
___________________ - When a disturbance damages a community, but the soil is still there
Succession
QuickTime™ and aTIFF (Uncompressed) decompressor
are needed to see this picture.
Humans and Species Diversity
________% of the land on earth is used by humans
Clearing the land -
_________________ - species that are moved into a particular area - called __________ _____________
________% of the land on earth is used by humans
Clearing the land -
_________________ - species that are moved into a particular area - called __________ _____________