Biotic Factors: Living Factors
ANIMALS: Artic Fox, Killer Whale, Sea Lion, Polar Bear, Walrus, Seal, Moose, and Lemming.
PLANTS: Artic Moss, Artic Willow, Bearberry, Caribou Moss, Diamond-leaf Willow, and Pasque Flower.
Abiotic Factors: Non-Living factors
Air, Sun, Precipitation (like snow/rain), Wind, Light, Water, and Gases (like oxygen and carbon dioxide).
Carrying capacity and Changes in the Population
Carrying Capacity- the largest number of individuals of one species that an environment can support.
Polar Bears' population will decrease when the food like seals and fish are scarce, but if the seals and fish have a larger population the polar bears will start growing. It goes back and forth until the polar bears die out.
Limiting Factors and Predator/Prey Relationships
limiting factors- The factors that limits the amt. of organisms can live in the environment.
Examples- Polar bears are the predator of seals. Without seals the polar bears would never have survived. The limiting factors affect how much prey or predators there is. The less prey the less predators can survive.
Energy Roles: The roles that the organisms have in an energy pyramid
Example: grass is the producer, deer is the primary consumer, and a snow leopard is the secondary consumer.
Food chains and Food webs
Food webs are more realistic than Food chains because they show all possibilities as food chains only show one set of possibilities.
Lets say that we took out the artic foxes. The polar bears will decrease in population and the lemmings will over populate and the grasses will become endangered.
Trophic Levels and Energy Pyramids
We use the shape of the pyramid because it represents that less energy is passed on when you go up higher in the pyramid.
Producers are at the bottom because they have the most energy out of any other organism in the pyramid. The top predators are at the tallest and smallest section because they have the least amount of energy transferred to them.
For photosynthesis to happen, there has to be carbon dioxide, water, and sunlight. oxygen and glucose (sugar) are produced during photosynthesis.
photosynthesis happens in the cells in the leaves. Inside the cells is chloroplast which has a pigment called chlorophyll.
chemical ---> mechanical
In my ecosystem there would be mainly geotropisms and phototropisms because the trees will cover up most of the sun so plants will have to move to get some light. Geotropisms because there is many hills in the tundra so the plant will have to grow properly by the roots growing down and the shoot growing up.
Tropisms help plants survive because these tropisms will help the plant get what it needs to survive.
Role of Decomposers
Decomposers are very important because they break down plant and animal waste and turn it into compost that helps other plants grow and continue feeding many consumers. Without decomposers there would be lots of dead plants and animals on the ground. There would also be no compost to help plants grow and there would be no plants for the consumer, then everyone would become extinct.
The decomposers in the tundra are moss and grasses and lichens.
Adaptations are important because they help the animals survive the conditions the ecosystem provides. For example if it was the tundra, the animals would have thicker coat of fur than an animals that live in the safari.
For my ecosystem, the tundra, the adaptations the animals would need would be thick coats of fur, fur covered hooves to grip the ice, and white fur to hide from predators/prey when running away/ hunting.
If i put one organism from my ecosystem into another they would die because they would have too thick of fur which would make their bodies overheat and no camoflage to hunt or hide from potential predators.
Natural selection is when a species adapts to survive in that habitat and reproduce.
One of the animals that have been naturally selected is the polar bear. Polar bears have been naturally selected because they have white thick fur which came because the weather is cold and the snow is white so the fur has to be thick to keep them warm and is white so their prey don't see them coming.