Biotic Factors: Living factors in an ecosystem

Biotic Factors:











Abiotic Factors: Non-living factors in an ecosystem

Abiotic Factors:


Hot temperatures

Dry Air

Scarcity of water

Little rain


Carrying Capacity: The maximum population of a species that an environment can contain
Limiting factors: food, water, space, and shelter

The Termite needs the plants and trees to feed on. They also need shelter to protect them from the aardvarks and oblek58945striches. They need space and water as well.

Limiting Factors: The factors in an ecosystem that can affect the species living there. Some limiting factors in a plains ecosystem are rain, competition, and shelter

Oblek58945striches eat mice

Energy Roles

Producer: Gets its energy from the sun. Ex: Grass, plants.

Consumer, Herbivore: Only eats plants. Ex: Gazelle, bison, giraffe, zebra

Consumer, Omnivore: Eats plants and animals. Ex: Aardvark, mouse, oblek58945strich

Consumer, Carnivore: Only eats animals. Ex: Lion

Consumer, Scavenger: Eats dead animals. Ex: Hyena

Decomposer: Breaks down dead organisms. Ex: Termite

Producers are vital to all ecosystems because they are what give all other organisms in the ecosystem their energy. They do not consume other organisms and do not rely on them to survive. They will never go extinct and thus will always provide the base energy to all organisms indefinately.

Food Webs and Food Chains

Food webs are more realistic than food chains because they show that organisms don't just eat one organism and are eaten by one organism. They show that organisms have more than one predator and more than one prey.

If I removed the oblek58945strich from my food web, it would overpopulate the mice. The overpopulation of the mice would underpopulate the hyenas and overpopulate the termites. The underpopulation of the hyenas would cause dead corpses of lions, gazelle, bison, giraffes, and zebras; the overpopulation of the termites would overpopulate the aardvarks and cause many trees and plants to be destroyed quickly. The destruction of trees and plants would underpopulate the zebras, giraffes, bison, gazelle, aardvarks, and mice. And the under and overpopulating would continue until a species goes extinct, which would lead to other species going extinct, and eventually the entire ecosystem would be wiped out.

Food Pyramid

The pyramid shows the amount of energy at each level and how it decreases as you move up.

Producers are at the bottom of the energy pyramid because that is where the most energy is available.



Hydrotropism: Movement in response to WATER

Geotropism: Movement in response to GRAVITY

Phototropism: Movement in response to LIGHT

Thigmotropism: Movement in response to TOUCH

Tropisms help the plants of the plains survive by letting them grow in the most effective way possible. They get the most sunlight, the most water, and the most protection that a plant can have.


Decomposers are vital to the plains because they fertilize the soil for the plants to grow. They also eliminate the wastes lying around so that the animals have places to roam .

Plains decomposers:







Adaptations help organisms survive by helping them live in their ecosystem by mutating new structural and behavioral traits.

The gazelle has adapted to the water-depleted plains by excreting less water in their urine and feces.

Blue Grama Grass and Buffalo Grass have adapted to the extreme climate of the plains by digging tremendously deep roots and spreading lots of seeds. They are adapted to be weather proof as they must survive the extremely hot, dry summers and the very cold, windy winters of the plants.

Say that I moved the blue grama grass to the rainforest. There is plenty of water there but plants must fight for the sunlight. In the plains the blue grama grass is adapted to fight for water, but there is an abundant amount of sunlight. The grass is also relatively short so that there is not many leaves that need the scarce water. But in the rainforest, the lack of leaves and the lack of available sunlight would surely kill the plant in a matter of weeks.

Another example is moving the gazelle to the mountains. The gazelle is adapted to scarce water, flat, soft land, and a bountiful amount grass to feed on. In the mountains, the ground is rocky and hard, there is not really a scarcity for water, and grass is limited. the gazelle would not be able to outrun predators because of his hooves. If  the gazelle population grew, they would have to fight for food, and gazelles are not very good at fighting.

Natural Selection

Natural selection is where organisms that have favorable traits survive and reproduce, and organisms with unfavorable traits die and do not pass on the trait.

Natural selection is important for organisms in an ecosystem because they allow organisms to adapt to an environment through mutations and the not-so-helpful traits will discontinue and new mutations that help an organism survive will be passed on so the next generations will have that helpful trait and they will survive easier.

One example of natural selection in the plains is with giraffes. The first giraffes were very short-necked, and they ate low-lying shrubs and grass. Then they started to eat leaves from small trees and then taller ones, then taller ones, and they just kept eating from taller trees. The tall-necked giraffes would reproduce and the short-necked ones would not, and eventually there was no more short ones. And now, the giraffes don't need to compete for food as they have access to all of the leaves that they need.

Comment Stream

2 years ago


2 years ago

Your energy pyramid needs something but I can't quite put my finger on it.

2 years ago

I also think you spelled ostrich wrong because I don't think its spelled oblek58945strich. so maybe work on that

2 years ago

Yes plural for gazelle is gazelles, so dont correct me.