Jadon G. and Connor L.
Location and Weather
The Tundra is the coldest of all biomes, and covers a whopping 1/5 of the land on Earth. Each year, it rains less than 10 inches, and each Summer only lasts 6-10 weeks. The Tundra is located around the Arctic Circle, a circle surround the North Pole. During the Winter, the temperature can reach -50˚(Fahrenheit), and during the Summer, can only go up to 50˚(Fahrenheit). Also, during the summer, the ground will become very soggy from the melted snow. The moisture sinks into the snow, which is called permafrost.
Organisms Found in the Tundra
At first it may seem as if the Tundra is too cold to support life. However, that's not true. You might actually find lemming, caribou, and arctic hares. Many lichens, mosses, and small shrubs flourish in the arctic tundra. The plants that live in the harsh permafrost soil usually adapt to the weather by being short and grouped together to resist winds and to be protected.
Predators and Adaptations in the Tundra
Though there is a lot of herbivores in the tundra, there are also carnivores to keep the herbivore population steady. The top predator in the tundra is the polar bear. A polar bear will eat seals, walruses and even belugas. A polar bear's front paws propel them through the water dog-paddle style. The hind feet and legs are held flat and are used as rudders. A polar bear can reach us to 10 kph (6.2 mph) swimming. These are few of the many adaptations of a polar bear that came from living in the tundra. A polar bear must additionally adapt to the harsh cold conditions of the Tundra.
A variation is a difference between organisms of any species caused by genotypic or phenotypic variation. For example, the lichens below show a phenotypic variation, because of color variation.
What eats What
If you Add an Exotic Animal
When adding a tiger to a new biome, you can upset the whole biome. The Tiger will unsteady the herbivores, rapidly decreasing them. Then, the top predators starve, and the producers over-populate. And like that, the whole biome could fall apart.
If you take Away a Native Animal
If you took away the whole population of lemmings from the food web, the top predators would starve for a little bit, while the other herbivores over-populate with less competition for resources. This would destroy the producers due to over-population and the need for resources, then destroy the herbivores because they ate all available resources, then killing the predators due to starvation.