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Population Dynamics - Coggle Diagram
Population Dynamics
Station A:
Birth
When an organism is born.
The population gets bigger.
Emmigration
When an organism leaves an ecosystem.
The population gets smaller.
Immigration
When an organism enters an ecosystem.
The population gets bigger.
Death
When an organism dies.
The population gets smaller.
Station B:
Resource Availability: The amount of resources available on a specific area.
These resources can be:
For producers:
Sunlight
Co²
Soil
Nutrients
Water
Pollen
For consumers:
For carnivores:
Prey/meat
Nutrients
Water
For herbivores:
Plants
Nutrients
Water
For decomposers:
Dead organic material
The more resources, the more population.
The less resources, the less population.
Changes in the Environment: Something that affects the resources in an environment.
These changes can be:
Less rain
Less rain would mean that plants could die because they would not be used with this quantity of water produced.
Deforestation
Food webs would die because most food webs depend on producers (trees) who are being cut out and may destroy a food web.
Floods
Floods destroy many forests and can end with most of the resources on these forests, and they can also drown most animals on these forests.
Station D:
Competition
When 2 or more organisms fight for a same resource
The population gets smaller.
Cooperation
When 2 or more organisms help each other.
The population gets bigger.
Station C:
Limiting factors:
Factors that can change the number of individuals in a population.
Abiotic limiting factors (non-living limiting factors):
Water
If there is not enough water for organisms, they might die.
Soil
Soil is also essencial for plants, and if the soil is not fertile, or if it's unbalanced, or if it's not fertile at all, the number of plants will decrease.
Sunlight
Sunlight is essencial for plants, and if there is not enough sunlight, the number of plants may decrease.
Biotic limiting factors (living limiting factors):
Plants
Basically consumers who eat food made by plants or even the plants themselves.
If there is a lower number of plants, there would be lower food for certain consumers (or decomposers) to eat.
Predators
A larger number of predators may decrease the number of preys in an environment.
However, if there is not enough consumers for predators to eat, the number of predators in an ecosystem may also decrease.
Diseases
Bacteria, viruses and other organisms may cause diseases on other organisms.
Diseases may kill other organisms.