Please enable JavaScript.
Coggle requires JavaScript to display documents.
POPULATION DYNAMICS, It is the death under ideal conditions such as death…
POPULATION DYNAMICS
Population Growth
Disperal Mechanism
Increase Population Identities
Population Expansion
Decrease Population Identities
Conditions in Original Habitat
Intrinsic Population Growth
Individual Reproductive Ability of Population
BIOTIC POTENTIAL
property/capacity of population to multiply
Population Size
Immigration
Emigration
Natality
Morality
Exponential Population Growth
J-shaped curve on graph
Logistic Population Growth
Carrying Capacity
Environmental Resistance
Nature's way of representing population growth
S-shaped curve
Lag Phase (population size small)
Log Phase(rapid growth)
Stationary Phase
(zero population growth)
Death Phase (population has exceeded carrying capacity)
Population
Population Distribution
Clumped Dispersal (individuals are clustered in groups)
Uniformed Dispersal (individual distribution are spaced evenly)
Random Dispersal (individuals are clustered in groups)
Population Size
Population Size is defined as the count of individuals in an area.
Population Density
Arithmetic (number of people per land area)
Physiological (number of people supported by a unit of area)
Agricultural (ratio of numbers of farmers to amount of arable area)
Growth Rate
Natural Change
Birth Rate
Death Rate
Migration
Domestic
International
Population Pyramid
Age Structure
Sex Ratio
Human Population Growth
Demography
Life Changes
Age-sex Structure Diagram
Rapid Growth
Large fraction of younger people
Less developed
e.g. Philippines
Slow Growth
Fewer young
More economically developed countries
e.g. United States
Stable
Zero population growth
Developed countries
e.g. Italy
Shrinking
Small fraction of young people
Developed countries
e.g. Japan
Implication of High Population Growth
Linkage to economic development
High population growth and economic development
Unemployment
High decrepancy ratio exploitation of natural resources
Mortality
Types of Mortality
Absolute Mortality
Realized Mortality
Survivorship Curves
Type II
constant death rate over each age interval.
produce relatively few offspring but provide significant care.
Type III
high mortality rate in earlier stages but it decisions after the "die-off" stage.
produce huge numbers of offspring but does not provide parental care.
Type I
mortality is low on early stages but rises when species becomes elderly.
produce few offspring and gives good parental care.
Limits to Growth
Limiting factors
Density Dependent
Competition within the population
Food
Water
Shelter
Mates
Light
Predation
Predator
Prey
Produce cyclical patterns
Learnings
Lyrix and hares
Disease and parasites
Host
Parasite
Waste accumulation
Disease and parasites
Host
Parasite
Density Independent
Natural disaster
Wildfires
Earthquake
Floods
Tornado
Severe weather
Hurricane
Drought
Human activities
Deforestation
Burning fossil fuels
Pollution
Air
Water
Land
It is the death under ideal conditions such as death without competitions and lack of resources.
It is the actual death count in existing conditions or environmental pressures.