Biotic Factors

Animals                                                                                                                                           .   
- Red Eyed Tree Frog
- Silverback Gorilla
- Toucan
- Spider Monkey
- Tiger

- Brazil Nut Tree
- Cacao Plant
- Rubber Tree
- Epiphytic Fern
- Palm Lily

Abiotic Factors

- Water
- Humid air
- Lots of rainfall
- Rich soil
- Constant Climate

Carrying Capacity and Changes in Population

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

To survive, a population needs food, water, shelter, and space.

The population of the Tiger changes based on how much prey is available and poacher activity. If there isn't much prey and many poachers, the population of the tiger dwindles. If there is lots of prey and little poacher activity, the population flourishes.

Limiting Factors and Predator/Prey Relationships

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

Limiting factors in the rainforest are the amount of sunlight, the amount of rainfall, and poacher activity.

A predator/prey relationship in the rainforest is the leopard, which hunts the monkey. Limiting factors can affect the monkeys, because if many leopards are killed by habitat change and poachers, they will have a better chance of surviving and repopulating. Limiting factors can also affect the leopards because if there aren't poachers around, they will have a better chance of survival as well.

Energy Roles

They are determined by how an organism gains energy and how it interacts with other living things in its ecosystem.

There are three main types of Energy Roles in an ecosystem:

Producer, Consumer, and Decomposer

Out of the Consumer category, there is:

Herbivore, Carnivore, and Omnivore

Energy roles in the Rainforest:
Producer- Tree
Consumer- Fruit Bat
Decomposer- Earthworm
Herbivore- Howler Monkey
Carnivore- Piranha
Omnivore- Toucan

Producers are a vital part of any ecosystem. They do what no human or animal can do- they take the sun's energy and change  it into a form animals can eat. Producers transform Radiant energy from the sun into Chemical energy. Without producers, nothing could survive.

Food Chains & Food Webs

Food webs are more realistic for the rainforest than food chains because they show many different options of  energy flow and options of what eats what. Instead of just one straight line, you have many intertwined lines.

If you removed the macaw population from this food web, many populations would change as a result. First of all, without macaws as food source, the python would have only the fruit bats to hunt. Then, the population of fruit bats would decrease, and many producer populations would increase. This is only one set of outcomes that would happen as a result of removing the macaw population.

Trophic Levels & Energy Pyramids

Using a pyramid instead of another shape helps show how the amount of energy available decreases. As you move further up, less energy exists and less organisms can survive. The pyramid is a perfect way to showcase amounts of energy per trophic level.

Looking at an energy pyramid, you notice the base is the largest and the top is the smallest. This shows that because more energy is available at the bottom, more organisms can  survive. As you move further up, energy is being used for life processes and less energy is available. This means fewer organisms can survive, and they must eat more. The triangle shows the way energy decreases as it passes through organisms.


Photosynthesis Chemical Equation:

CO2+H2O -> C6H12O6+O2

For photosynthesis to take place, a plant needs sunlight, carbon dioxide, and water. In result of photosynthesis, glucose (sugar) and oxygen is created.

Photosynthesis takes place inside a cell's chloroplast.


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

- A tree bending to reach the sun's light - PHOTOTROPISM
- A tree's roots growing down, even though the sapling is lopsided - GEOTROPISM
- Roots stretching down to suck up water from the ground - HYDROTROPISM
- A vine grows around a tree - THIGMOTROPISM

These tropisms are essentail to a plant's survival. If the plants couldn't respond the light and be able to bend toward it, they would not get the sunlight they need to create their food. Also, if the plant's roots couldn't stretch down responding to gravity, they wouldn't get as much water as they need. Ultimately, many plants would die without tropisms.

The Role of Decomposers

Decomposers are a vital part of any ecosystem. They take dead organic matter and break it down, returning the nutrients back to the environment. If a plant dies in the rainforest, decomposers get to work immediately. Decomposers eat the dead plant and change it into soil! The soil is full of the nutrients the plant had when it was alive, and the soil helps other plants grow. Decomposers are vital to the rainforests because rainforests are very dense and full of life. If there were no decomposers in the rainforest, then all of the dead organic material would pile up. The rain forest would be unlivable for the inhabitants.

Decomposers in the Rainforest:
-Velvet Worm


Adaptations are a change an animal or plant makes to itself or its behavior to survive in particular environment. Adaptions are important because they are essentail to an organsim's survival. If a certain bird needs a different way to get food, over many years it may adapt they way it is structured to get the food easier. This way, the bird won't die off becauseit can't get food. Also, a plant may need more sunlight in a day than jt is getting. Over many years, the plant will learn to follow the sun more diligantly o get the sunlight it needs to survive.

The two types of adaptations are
Behavioral Adaptations and
Structural adaptaions.

Behavioral adaptations are a change in the way an organism behaves. Structural adaptations are a change in an organism's body or structure.

Adaptations in the Rainforest:
- A toucan developed a long bill to be able to reach small berries hanging on branches too small to support the toucan's weight - Structural Adaptation
- A sloth allows blue-green algea to hang off it's fur to camoflage into it's environment and make it hard for predators to spot it - Behavioral Adaptations
- Many rainforest tress have adapted a "drip trip". They chnage their leave shape so water falls off quickly and fungus doesn't grow on the leaves - Structural Adaptation
- The Strangler Fig deposits its seeds onto other larger plants and grows on that plant. It steals the water and sunlight from the host plant and eventually kills it - Behavioral Adaptation

What would happen if a toucan was placed in the artic to survive?  The toucan is not built for artic survival. It wouldn't be able to getbfood, because food is scarce above water in the artic and a toucan can't swim. It wouldn't be able to find shelter, because toucans live in the canopy section of the rainforest and there are not many trees in te artic. The toucan would most likely die of hypothermia, because the toucan doesn't have any feature on it's body to hold in heat

Natural Selection

Natural selection is the process of using your assets in your environment to help you survive over lesser prepared organisms. Natural selection is important because it helps a species become stronger. If a species of lizard has two different color options for its skin, dark or light, natural selection will help the lizards figure out over time which color helps them survive more often. Natural selection is a process, and if the darker skin helps the lizards blend in to their surrounds better than a lighter skin, the lizards will over time completely adapt to that skin. Natural selection is a process that is vital to any ecosystem.

The poison dart frog and its relatives have naturally selected in their environment. To aviod being eaten, the frogs have poisonous skin that kills it's predators. The frogs have also developed a brightly colored skin to warn it's predators that it is poisonous. This prevents the frogs from being eaten by man would-be predators. Many of the frogs are not poisonous at all though; they have just changed to look like their relatives. This poison and mimicking keeps the frogs alive.

Comment Stream

View Older Posts
3 years ago

You did a really good job! I love your pictures

3 years ago

Amazing job! Nice work.

3 years ago

Thanks Chelsea, Payton, and Matthew!!!

3 years ago

it looks really good

3 years ago

Very nice and neat! Love all the colors!

3 years ago

Thank you Caynon and Chloe!

2 years ago

love the colors and you did a very neat job in your portfolio!! i love the pictures! :

2 years ago

Thank you Gracie!

2 years ago

It is very detailed and it looks great

2 years ago

Thanks Canyon, but you have commented on mine 3 times...