-Amount of sunlight
Carrying capacity is the largest number of individuals/species that a single environment can support.
The amount of polar bears alive depend on the amount of seals available to eat.
Limiting factors controls the populations for each species, so one doesn't get too big or too small.
The graph above shows the predator-prey relationship between the polar bears and the seals.
The producer would be the herbs, herbivore is the caribou, and the polar bear is the consumer.
The sun is important to every ecosystem, because it allowed the producers to reproduce.
Food webs and Food chains
Food webs are better than food chains, because food chains only shows one food chain, while food webs shows many food chains.
If I took out the hunters, the animals would overpopulate.
Trophic levels and Energy pyramids
The pyramid shape shows the abundance of each trophic level and shows the kcals.
The bottom of the pyramid (producers) has the biggest population and the top (secondary consumer) has the lowest population.
6CO2 + 6H2O ------> C6H12O6 + 6O2 is the chemical equation for photosynthesis.
Tropisms is where the plant grows towards the light. Some tropisms in the arctic are geotropism and phototropism.
If in the future a meteor or a planet collides with the earth and changes the angle of the planet and the arctic tundra gets light from one angle,then the arctic tundra will have a chance of surviving.
Decomposers break down dead matter and resupply the soil with nutrients. If there were no decomposers, the plants will wilt and die, then the food chain will be thrown off balance.
A decomposer in the arctic is bacteria.
The importance of having adaptations is that you can adapt or "become" part of the enviroment. Some adaptations to the polar bear is the sharp teeth to easily tear through the seals fat, and the thick fur to keep the bear warm.
For animals to survive in the arctic, they have to have thick fur to keep warm and sharp teeth to easily eat seals or to scavenge dead prey. For plants, they would need sharp leaves and large storage areas.
If I put a polar bear in the desert, it would not survive for a week, because the thick fur would overheat the bear and after the bear gets overheated, scavengers would eat the bear killing it.
Natural selection is the genetic way of guarantee the end or survival of a species. It's important, because it makes one population bigger or smaller than another to balance the ecosystem.
The polar bear has been naturally selected, by the population has gone up and down by the seals available to eat.