The Forest Ecosystem

Biotic Factors

Some biotic factors are trees,shrubs,ferns,mosses,lichens,fungi,mammals,birds,reptiles,worms, and microbes.

Abiotic Factors

Some abiotic factors are soil,minerals,rocks,water,temperature,sun,and air.

Carrying Capacity-Maximum population size of the species that the environment can give food,habitat,and water.

For a population to survive,it needs air,food,water,habitat,and space.

For a deer population to survive in the forest as their become more deer the habitat will decrease and with less deer the habitat will increase.

limiting factors- a factor that  tends to limit population

Examples of limiting factors- For a moose a limiting factor would be forest fires.

For a plant the limiting factor would be sunlight.

For a deer if the weather was really bad the limiting factor would be no food source.

A predator for a deer would be a wolf and the deer's limiting factor could affect the deer by not having as much food because of the wolf.

Different types of energy roles are...

producers-Plants like the:White Oak,Northern Red Oak,and Post Oak

consumers-White Tailed Deer,skunks,bugs,raccoons,and black bears

decomposers-Shelf Fungus and Goldsmith beetle

The consumers get their energy from the producers

The decomposes get their energy from the consumers

The producers get their energy from the sun

The producers get their energy from the sun and that's how the producers give off energy to the consumers. Producers are vital to the ecosystem because without producers the consumers wouldn't have anything to get energy from and they would die.

Food chains and food webs

Food webs are more realistic than food chains because food webs show more options and more examples of what each organism eats.

If I removed the grass the consumers would start to decrease in the forest ecosystem because they would have no producers to eat.

Energy pyramid in a forest


Producers-grass and trees

1st level consumers-cricket and grasshopper

2nd level consumers-mouse,rabbit,squirrel,bird,and deer

3rd level consumers-fox,owl,and hawk

The reason the shape is a pyramid is because the pyramid shows the different levels of energy.

Producers are the largest level because the animals need plants to survive and without plants the consumer population would be really small. The predator is the smallest population because there aren't a lot of predators in the forest.


For photosynthesis to happen plants need water,sunlight,carbon dioxide,and chlorophyll.

Photosynthesis produces glucose.


Tropism-The turning or bending movement of an organism toward or away from an external stimulus.

An example would be a sunflower when it's tilted down and the sun shines on it and it lifts up.

Role of decomposers

Decomposers are vital to the forest ecosystem because if you didn't have decomposers,then there would be nothing to eat the consumers.

Some decomposers in my ecosystem would be;fungus,bacteria,and invertebrates.


The importance of having adaptations is that they help you adapt to the environment and help you survive. Adaptations help organisms survive by the traits the organisms have like claws,teeth,fur,ect.

A few adaptations an animal would need to survive in the forest would be;claws,teeth,and fur.

A few adaptations a plant would need to survive in the forest would be;bark,lianas,and drip tips.

If I placed a deer from the forest to a desert,the deer would have to adapt to the desert because the desert is a lot different from the forest because the desert is more dry than the forest and the deer wouldn't have any water to drink,therefore the deer population would decrease.

Natural Selection

Natural selection is the process where organisms better adapted to their environment tend to survive and produce more offspring. It's important for organisms in an ecosystem because if the organism is well adapted to their environment,then they will survive longer.

Comment Stream

2 years ago

This is great, but you might want more detail in abiotic section

2 years ago

try and be a little more specific with your biotic and abiotic factors.

2 years ago

this is great and your steps 3 and 4 are good

2 years ago

Great job! Lots of color and very neat! I saw nothing wrong. (Great pictures btw)😊

2 years ago

You did a good job! It is very organized and you have good pictures