polar bears are boitic
polar ice caps are abiotic
*polar ice caps
Changes in the population
A population change can happen when resources are limited.
EXAMPLE: Say shelter for bunnies is low the polar bears will eat them and then no more polar bear food then the population of the polar bears drops.
Limiting factors are things that prevent a population from growing any larger. An example is if the snow hair die out the polar bear source of food is gone and they die out.
Our energy starts at grass patches and moves up from there.
Producers are very important because they start the energy flow.
Food webs are more realistic because they show all the animals in a ecosystem.
An example of photosynthesis:
Formula for photosynthesis:
Tropisms are directional movement responses that occur in response to a directional stimulus. Plants are not able to relocated if they happen to start growing where conditions are suboptimal.
The role of decomposers
- Decomposers and scavengers break down dead plants and animals.
- If there wasn't any decomposers in the arctic waste of these animals would be too much and nothing would be recycled to the population.
- Foxes would play the role as the decomposer or scavenger of the arctic population.
They would die because they wouldn't be adapted for that population.
Natural selection |
The process where organisms better adapt to their environment to survive and produce more offspring(s).
EXAMPLE: Natural selection in the arctic is shown in polar bears. One bear was born white and produced more offspring more like it and the brown bears died out because they were visible to their prey. The white bears survived with their camo and now all polar bears are white.