Tundra Ecosystem

Biotic Factors : Living factors in an ecosystem

   Plants            animals
Mosses              Bears        
Trees                Foxes
Berries             Wolves
Flowers            Caribou

Aboitic Factors :Non-living  Factors in an ecosystem

Dry air

Carrying capacity

Carrying Capacity - The carrying capacity is the number of species in an environment that are able to be sustained without being overpopulated.

The population of Polar Bears and Penguins change over time depending on the amount of the other population and resources there are. For instance, if there are tons of Polar Bears the Penguin population will decrease since they are being eaten. It also goes the other way around. If there are almost no Polar Bears, then the Penguin population would rise. It is like the checks and balances of nature.

Limiting Factors

Limiting Factors - Common resources or environmental conditions that limit the growth or distribution of an organism or a population of organisms in an ecosystem.

Limiting Factors in the Tundra:

*Poor soil

*Limited growing season

*Cold and icy temperatures(Due to these temperatures animals had to stay warm by huddling together or building dens.)

*No plants

A Predator/prey relationship that could be effected by limiting factors could be Seals and Killer Whales. If ice freezes over the water then Killer Whales cannot get to most of the seals. If the cold causes Seals to freeze and die, then the Killer Whales cannot eat them and may have to focus on eating other prey. Another limiting factor that could effect Killer Whales and Seals is when ice melts. If there is an overflow of water the Seals must retreat to deeper land and that makes Killer Whales have to move closer to the shore.

Energy Roles

Organisms that are specific to my ecosystem are Grass, Arctic Hares, Arctic Fox, and Arctic Wolf. Grass receives energy from the Sun when it is out. Arctic Hares eat the grass and then the energy is passed on to the Arctic Fox when it consumes the Hare. Finally, when the Arctic Wolf consumes the Arctic Fox it receives the energy.

The producer's are vital and important to an ecosystem because they can change the sun's energy into energy we can use. Without producers, we would not be able to get the 90% of energy we need to live.

Food Chains and Food Webs

Food webs are more specific than food chains because they show more of the possibilities for the ecosystem.If I removed one population from my food web it could effect the amount of other populations. For example, if I removed the Arctic Hare other populations would also die off while others would increase.

Trophic Levels and Energy Pyramids

Energy Pyramids or more convenient than cylinders, cubes, etc. because they are an easier visual for you to see the way the energy transfers from one level to another. The reason producers are at the bottom because that is the start of the energy and where there is the most energy. As you move up, the amount of energy being transferred decreases along with the size of the pyramid.


The things needed for photosynthesis are Carbon Dioxide, Water, and Light. The things produced by photosynthesis are Glucose (the food) and Oxygen (the wastes).

The chloroplast is where the process photosynthesis takes place in the plant cell. The energy transformation occurring is the radiant energy from the sun converts into chemical energy, or food.


Tropisms: turning or being movement of an organism toward or away from an external stimulus, such as light, heat, or gravity.

Examples: The most likely tropisms in the Tundra are Hydrotropism, which is the movement or growth in response to moisture or water, and Thermotropism, which is the movement or growth in response to temperature.These tropisms affect if the plant survives. An example is, the plant moves towards the heat in the Tundra because it's really cold, or if a plant needs the water or it gets to much water it needs to move away from the water. Because of the movement, the plants are able to survive.

The Role of Decomposers

Decomposers are vital to the Tundra because they make use of dead organisms. Without decomposers, it would be hard to break down the dead material and return it to the environment. Decomposers are vital to all ecosystems, not just the Tundra. The decomposers make it easier to turn the waste into something useful for the environment.

Some decomposers you would find in the Tundra are foxes, hares,


Adaptations are very important when it comes to the Tundra. For example, having long fur is important because it keeps animals warm since they live in an cold place. Another important adaptation is blubber. Whales such as Orcas have blubber to keep them warm while swimming and living in the cold frozen water.

Some adaptations that plants have are being to grow under a layer of snow, carry out photosynthesis in cold temperatures, and produce flowers quickly in the summer. Some adaptations that animals have are thick fur, white fur, and blubber. All of these adaptations are important for survival. Whether it keeps them warm or allows them to blend in, it is very important for surviving in the Tundra.

If you were to place an organism from the Tundra in a different biome, many things could happen. For example, if you placed an Arctic Fox in the Rainforest, it wouldn't be able to blend in. Therefore, it would be easy to hunt down and kill.

Natural Selection

Natural Selection - The process of biological traits becoming less/more common in a population as a function of the effect of inheritable traits on different reproductive success of organisms interacting with their environment.

An organism that was naturally selected in my environment was an Arctic Hare. When the environment began to cool even more, the Arctic Hare's population decreased a bit. They didn't have the proper warmth to survive. So, overtime the population had to adapt to the cooler temperatures.

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2 years ago

I love your pictures!

2 years ago

nice pictures

2 years ago

Good info

2 years ago

Nice layout and Good information

2 years ago

thanks ellen

2 years ago

thank you lindsey

2 years ago

thanks masson

2 years ago

Thanks alot Emily😄

2 years ago


2 years ago