#ecoys ecosystem portfolio


Polar bear, trees, bushes, Arctic moss, Arctic poppy, and Arctic willow


Light, heat, snow, ice, chopped down dead wood, and temperature.

Carrying capacity

Carrying capacity is the most that a population can hold with the amount of food, water, and shelter in the area. A population can change over time do to lack of resources or of an abundance of resources.

Limiting factors

Some limiting factors in my ecosystem would be: the lack of food and water, but the abundance of space and shelter. Polar bear hunting the fish and say if the water is all frozen then the polar bear would go hungry.

Energy roles

Producers: plants: algae, trees, moss, etc. Consumers: consumes other living things to get energy. Decomposers: breaks down the dead plants and animals.  Herbivore: only eats plants: Carnivores: only meat eaters: Omnivore: meat and plant eater Scavenger: eats after the carnivores, and omnivores.

The decomposers get their energy from dead plants and animals, then the animals get their energy from the plants or other animals, last the plants get their energy from the sun. Producers are vital to an ecosystem by releasing oxygen into the air for other living thing, and they make glucose for themselves and other animals.

Food chains and food webs

Food webs are more realistic than food chains, because food webs have different varieties or producers and consumers like. Like in real life.

Lets say that all of the purple saxifrage dies out. Yes at first the ecosystem would be fine, but over time all of the other producers would start to decrease due to the lack of Purple saxifrage.

Tropic Levels and Energy Pyramids

The levels of the energy pyramid are in order from top to bottom; Producer, primary consumer, secondary consumer, and tertiary consumer. A pyramid is


The entire steps of photosynthesis are broken down into a formula like this C6H12O6. The reactants in photosynthesis are water, sunlight, and carbon dioxide. The process produces oxygen and glucose. Photosynthesis occurs in the chloroplasts in the leaf.


Tropisms are the turning of all or part of an organism in a particular direction in response to an external stimulus. Some tropisms in my ecosystem could be the way the trees and bushes grow up in response to the light. Another one may be the response to the trees growing up to redirect gravity.

Tropisms like phototropisms help the ecosystem survive by growing plants up toward the light to start the process of photosynthesis.


Decomposers are vital to my ecosystem by them decomposing dead plant, and animals to make compost for the new plants. If decomposers weren't in any ecosystems all plants and animals would struggle to survive. Also the entire ecosystem would be packed due to the dead bodies and trees everywhere. Some decomposers in my ecosystem are soil bacteria, mushrooms (underground), and scavengers. The soil bacteria are the most effective.


Adaptions are important, because they help the animals well adapt and survive in an environment like thick or thin fur, sharp claws, spinning webs, etc.

Plants would need adaptions like; using less energy and water, photosynthesis, etc. Animals would need adaption like; thin fur, sharp teeth, hibernating, etc.

If you were to take an animal ,such as a snake, from its ecosystem to another, the snake would be confused and won't know where the food is or more important where the water is.

Natural Selection

Natural selection is kind of related to adaption, natural selection is where the best adaption.

Take a white polar bear for example, white polar bears were naturally selected because of its fur, so it can hide from preys so they can eat. The process was slow but both white and brown bears had an equal population, but over time the white bear has increased due to its camouflage.