Biotic Factors of The Arctic:
Animals: Polar Bears, Narwhals, Arctic Fox, Arctic Hare, Caribou, Walrus, Wolverine,ect.
Plants: flowers, lichens, herbs, ect.
Abiotic factors of The Arctic:
Oxygen, Carbon Dioxide, Permafrost, Lots of Snow & Ice, Rocks, large amount of sunlight during summer, none during winter (endless night), Water, soil above permafrost, sand on ocean floor
Carrying capacity is the largest number of organisms (from one species) that one ecosystem can support based of of population, limiting factors, ect.
All animals need food, water, shelter, and SPACE to survive, thrive, and reproduce.
During the summer in the Arctic, polar bear's population slowly begins decreasing as the number of both adults and cubs, as they may drown (They drowned of fatigue as the ice floes were to far apart for them to reach said ice floes on which to rest and feed) They can also die of starvation ;or, in the cases of the cubs, if they wander from their mother, or their mother dies, they are probably all but dead.
Anything that limits the growth of a population within an ecosystem. Some found in the Arctic are: 1: Not enough food. 2: freezing temperatures can kill if unprepared 3: Habitat Destruction as the amount of ice up there decreases every year. 4: ECT!!!!!!
Producer: Scrub Grass, Algae, ect.
Consumer 1 (Primary): Caribou, Plankton, Fish, ect.
Consumer 2(Secondary): Arctic Wolves, Seals, Penguin, Arctic Foxes, Ect.
Consumer 3(Tertiary): Polar Bears, Sea Lions, Ect.
Each of the above shown consumers gets his/her energy from the organism's they consume (i.s. The penguin adults get their energy from fish, while the baby gets it from regurgitated fish, but it is still fish) the producers get their energy from the sun in the form of solar energy/sunlight.
Producers are needed in this environment as they give food to one of the most needed consumers in this system: the caribou. They also turn the carbon dioxide in the air to oxygen, as there are few to no trees to do so.
Food webs are more realistic than food chains as they show that there is more than one chain of energy flow as there are multiple herbivores and omnivores that can be eaten by carnivores or other omnivores.
If I removed the algae (#1 in web above) from this ecosystem, it would cause the herbivores who eat that to die, which would cause the carnivores who eat the herbivores to die, as their food would have died out. All in all, removing the sea algae would be disastrous.
Trophic Levels and Energy Pyramids
The pyramid shape was chosen as it showed that every time one organism consumed another, only some it's energy (10% to be exact) For the same reason, they could have used a cone, but i guess they liked pyramids better.
The producer level is the biggest, showing that it has the most energy of all the trophic levels. The same rule applies to the top consumer level, as it has the least amount of energy of all the trophic levels.
A tropism is an organisms response to an external stimuli, like how grass roots grow downwards in response to the stimuli that is gravity.
One tropism that helps arctic plants survive is geotrophisms, as the stimuli of gravity pulling it down usually keeps the roots from flash freezing overnight.
In simple words, the point of adaptions is to help you survive and reproduce, then let the circle of life continue on that road. There are 2 main forms of adaptions: structural, or the changing of the physical form of something, and then behavioral, or the changing of ones habits or way of life.
If you placed a polar bear in the Amazonian Jungle, it would either overheat and die, starve to death, or be killed by something adapted to survive in the jungle.
Natural Selection is the process when animals, plants or disease, ect (nature) choose which animals in a species will live, and which will die.