Food Chain & Food Web
In my food chain the energy goes from the sun, to the moss, to the caribou which is a herbivore (plant eater), to the wolverine which is a carnivore (meat eater), and to the artic fox. There are no omnivores (eats plants and meat) in my food chain. In the predator, prey relationship of my food chain, is a bear and squirrels. The bear never has to worry about food, because even if squirrels were gone, the bears could still eat berries. An example of an invasive species in the Taiga could be a tiger. It could possibly survive from the forest, but could die from how cold it could get. Density dependent includes predation, competition, parasitism and disease. Density independent include weather, disasters, season cycles, and human activities. Density independent affects all population no matter what the size, but density dependent depends on the size of the population.
The energy pyramid shows how the energy flows through a food chain, also how the energy is decreasing and becoming less available to the organisms. If 100% is available at the first trophic level then there is only 1% available at the highest trophic level. Energy is lost, because when you go up trophic levels the energy is not as common.