Biotic Factors: Living Factors in an Ecosystem

Animals-American Toad, Badger, Black-Footed Ferret, bison, black- tailed jet rabbit, bumble bee, burrowing owl, California condor, carrion beetle, common snipe, coyote, deer, dragonfly, Eagles, prairie dog, shrew, and the red-tailed hawk. Plants-buffalo grass, milkweed, purple comeflower, and Indian grass.

Abiotic Factors:Non-living factors in an ecosystem

Sand, grass, hot to mild temperature, very little rain to moderate rain, sunlight, dry, hot air.

Carrying Capacity and Changes in Population

Carrying Capacity- is the largest number of individuals of one species that an environment can support.

The items needed for a population to survive are water, food, shelter, and space.

The bison population can increase or decrease depending on the amount of plants that grow that year or if there was a drought one year.

Limiting Factors

Limiting Factors- are any factor or condition that limits the growth of a population in an ecosystem.

Food, water, and sunlight are 3 limiting factors this ecosystem.

Predator/Prey Relationships

One predator/prey relationship in my ecosystem is that of the red-tailed hawk and the black-tailed jet rabbit. Limiting factors affect them because if there isn't enough water, the plants will die, then the prey, and last but not lest the predator.

Energy Roles

Herbivores- consumers that eat only plants. Carnivores- consumers that eat only animals. Omnivores- consumers that eat both plants and animals. Scavengers- consumers that are lazy and feed off of already killed carcuases.

Prey is what animals eat or consume. Producers: milkweed, Indian grass, and buffalo grass. Herbivore: black tailed rabbit, bison, and deer. Carnivore: coyote, badger, and Eagles. Omnivore: common snipe, and shrew.

Producers energy comes from the sun, and the soil. The herbivores energy comes from the plants that the eat. Carnivores is from the primary consumers they eat. Omnivores energy is from the plants and animals that it consumes.

Food Chains and Food Webs

Food webs are more realistic because in my environment more than one animal eats another.

If you removed one population from the food web would change. Some of the populations would be overpopulated or underpopulated. If one population was extinct the level below or on top would have to eat another organism.

Trophic Levels and Energy Pyramids

Producers(10,000 kcal) Primary Consumer(1000 kcal) Secondary Consumer(100 kcal) Tertiary Consumer(10 kcal)

They use a pyramid to show that the farther you go up the energy pyramid the less energy there is. At the top there is only 10 kcal where as at the bottom there is 10,000 kcal.

Plants are vital to the ecosystem because they begin the food chain, web, or pyramid. They take in sunlight and transform the energy into chemical energy. The only part of the ecosystem that begins by photosynthesis. It represents the start of all food chains and food webs.

They are converting solar energy into chemical energy . Consumers at the top have less energy to support them so less of them have used up their energy. They bring energy into the system from nonliving sources.


For the photosynthesis process you need carbon dioxide, and water. Photosynthesis produces the plants food called glucose.


Tropisms-are the turning or bending of an organism toward or away from an external stimulus, such as heat, light, and gravity.

One positive tropism in my ecosystem is the flowers move toward the sun which is phototropism.

One negative tropism in my ecosystem is that the roots of the flower move away from the sun down into the ground.

These tropisms help the ecosytem survive by giving the animals enough plants and vegetation to eat and for their offspring to eat. The negative tropism doesn't allow the animals to get all of the nutrients it can if it got everything.

Roles of Decomposers

Decomposers are vital to the ecosystem because without them the dead animals would sit on the hill and valleys, etc...
If there was no decomposers dead animals would overrun the ecosystem.

Some decomposers you would find are fungi, and decomposing bugs.


Adaptations are important to the ecosystem because one year the weather may be extremely cold and the next year the highest temperature might be 123 degrees. The animal can adapt so it does't die of heat stroke from fuzzy fur or freeze to death come winter from a small layer of hair.

For the prairie animals you would need small or medium feet and hands, long sharp claws, and a very small layer of hair. The plants would need something to protect themselves from the harsh sun.

The effects of putting an organism in another environment would disturb the food chain or food web. If the organism did not die then eventually it would adapt and have the things that that environment would need.

Natural Selection

Natural Selection-is when animals that are better adapted for their environment will more likely survive than the ones not quite adapted. It is important because if the animal is better adapted the bigger the population, the less likely they are to go extinct.

There are types of beetles brownish and greenish. During the summer months the brownish beetles are more easily spotted so their numbers decrease. When the numbers decrease the number of birds eventually decrease because the greenish beetles were harder to spot.

The cause of the change would be the amount of birds there are in that ecosystem.

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2 years ago

Like your pictures!

2 years ago

Thank you!!!!!!

2 years ago

Thank you Mrs. Gunnip and Ellen.

2 years ago

Great examples and pictures. I LOVE the prairie dogs 😍

2 years ago

Thank you Grace.

2 years ago

you did great on the pictures.

2 years ago

Thank you Emily.

2 years ago

Nice job on your tackk and I like all of the great detail and the organization.

2 years ago

Thank you Wade.

2 years ago

Thank all of y'all!!!!!!!!!!!!!!!!