Cold temperatures Strong winds
Polar bears Whales
Musk oxen Seals
Elder Duck Arctic wolf
Carrying Capacity is the amount of organisms a single ecosystem can support. The resources needed for an organism to survive are food, water, shelter, and space.
The Polar Bear population changes based on how many seals, their food, there are for them to eat.
Limiting Factors are factors that prevent the populations of species from getting out of control. For example, the amount of ice, or the amount of seals for the polar bears to eat.
A specific predator/ prey relationship is the one between polar bears and seals as seen in the graph.
Arctic food roles
An example of an arctic food chain is grasses as the producer, the Musk Ox as the primary consumer, the Arctic Wolf as the secondary consumer, and the Polar bear as the tertiary consumer.
The grasses receive their energy from the sun, the Musk Ox from the grasses, the Arctic Wolf from the Musk Ox, and the Polar Bear from the Arctic Wolf.
The producers are vital to the ecosystem because they are the only ones that can change radiant energy into light energy, so without them none of the other organisms could get energy and they would all die.
Food webs are more realistic than food chains because in a food chain each organism can only eat one food but in a food web, and the real world, most organisms eat more than one food.
If you remove one organism from a food web then the things it eats will increase in population and the thing that eats it will decrease. Also, the thing that it eats food will decrease.
The Pyramid's Shape
Food pyramids are pyramids because it shows how less and less amounts of energy are available as you go up.
6H2O+6CO2----->C6H12O6+6O2 is the chemical equation for photosynthesis.
What is needed for photosynthesis?
For photosynthesis to happen the producer needs H2O, CO2, and sunlight.
What does photosynthesis make?
Photosynthesis makes chemical energy from radiant energy.
Photosynthesis in the leaf
A tropism is the turning or bending movement of organisms toward or away from an external stimulus, such as light, heat, or gravity. An example would be Arctic poppies turning during the day so they are always facing the sun. This would help it survive because it needs the sun to go through photosynthesis so when facing the sun it can get more food. The link is http://youtu.be/3MYJEm99MYQ because you can't save from YouTube for the video.
Decomposers are vital to the tundra because they get rid of the stuff nobody else wants to do any thing with. If there wasn't any Decomposers the arctic animals would all be buried in their own poop. Arctic mushrooms and arctic ravens are Decomposers in the arctic.
Adaptations are important for a biome because the world is always changing, so a species needs to be able to change with it. The three types of adaptations are behavioral and physiological and structural. Adaptations that would help in the arctic would be thick coats to keep warm, white color to blend in, being able to resist lots of cold, plants being able to go through photosynthesis quickly due to lack of sunlight and lots of darkness where photosynthesis can't occur, etc. If you put an organism in a different biome than they were meant to be in then they most likely will die because they couldn't adapt quickly enough, but maybe if you moved something from like the arctic to the taiga it could survive.
Natural selection is the survival of the fittest. It is important because if you are born with not all the things you need to live you are probably going to die so you need to be born with those qualities. An example of natural selection in the arctic is bears turning white. They were originally all brown but one was born with a genetic mutation that helped it blend in so its kids were that color and the whit ones survived way better so eventually all the brown bears in the arctic died out and they are all now white. The environment change that caused that change was the environment turning white during the first ice age.