Biotic  Factors

     Plants                                          Animals

          Seaweed                                                               Dolphins
   Coral Reef                                                         Sponges
                Kelp                                                                                  Turtles
    Seagrass                                                             Starfish
   Plankton                                                                Shrimp
       Algae                                                                                 Sharks
   Gum Weed                                                                 Otters
 Nudibranchs                                           Sea-Horse

Abiotic  Factors

Low  Oxygen  Level
Freezing  Temperature
Soil Type

Carrying Capacity

  • Definition: The largest number of indivisuals of one species that an enviroment can support.
  • Resources Needed For Population To Survive: Food, Shelter, Water, and Space


Populations will constantly change over time depending on changes in the habitat. In an ocean, the population changes very often since there are so many animals and many babies being born. While the population grows, the change and population in an ocean depends on the habitat resources and if there is enough for all the animals.

This is habitat resource changes and population change.

Limiting Factors

Definition: Any factor or condition that limits the growth of a population in an ecosystem.

Examples: Food, Water, Light, Temperature, Disease Soil Composition.


  • Sharks prey on sea lions. So if the sea lion population decreased, then the shark population would also decrease.

Energy  Roles

Definition:They are determined by how the organism gains energy and how it interacts with other living things in its ecosystem


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

Examples: Kelp, Seaweed, Phytoplankton, Sea Grass, Red Algae

Energy: Receive their energy from the sun, the main source of energy

Vital Reason: Producers are vital to the ecosystem because they receive their energy from the sun, which is the main source of energy. They then provide energy that fuels the rest of the ecosystem.

Seaweed Kelp Algae is a producer.


Definition: Organisms that do not make their own food; they feed on other organisms (plants and animals). All animals are consumers.

Energy: Receive their energy from other consumers and producers


Examples: Clown Fish, Manatee, Parrot Fish

A Manatee is a herbivore.


Examples: Blue Crabs, Sea Otters, Sea Turtles, Seal


Examples: Sea Lions, Sharks, Dolphin, Blue Whale

An example of a carnivore is a Dolphin.


Examples: Star Fish, Eels, Sharks


Definition: Organisms that break down waste and dead organisms and return the nutrients back to the environment.

Examples: Hag Fish, Fungi, Sea Weed

Energy: Receive their energy from the dead material of the consumers

Food Chains  And  Food Webs

Food  webs  are  more realistic  than  food  chains because  a  food  chain shows  one  possibility  but  a food web  shows  multiple possibilities  making  it more  rational.

If the Tuna Billfish population was taken out of this food web then the Mesopelagics will grow because they will have lost one of their predators. Humans will have lost one source of food.

Trophic  Levels  And Energy Pyramids

Pyramid  Shape

Reason:  An energy pyramid's shape shows how the amount of useful energy that enters each level — chemical energy in the form of food — decreases as it is used by the organisms in that level.

Level: Producers   are  in the largest level because  they  make  their  own  food  and  have  the  most  energy    w ithin  themselves.  bring energy from nonliving sources into the community.


water, sunlight, and  carbon  dioxide  are  needed  for  photosynthesis . Glucose, sugar, and oxygen  are
produced  by  photosynthesis.

Where photosynthesis takes place within a plants cells.
Energy transformation taking place during photosynthesis.


Definition: turning or being movement of an organism toward or away from an
external stimulus, such as light, heat, or gravity.

Some examples of tropism in the ocean are phototropism, hydrotropism, geotropism. Phototropism is the way it reacts to the sunlight. Hydrotropism is the way it bends towards water. Geotropism is the way turning or growth movement by a plant or fungus in response to gravity.

These tropisms help the plant survive by getting them all of the needed resources and without it plants wouldn't be able to get enough water, heat, and sunlight.

The  Role  Of  Decomposers

Decomposers are vital to the ocean ecosystem because they break down once living matter into the ecosystem and release organic compounds to be used by plants. Without decomposers we wouldn't have new plants because the plants wouldn't get the needed nutrients that help them grow.They also recycle the dead material and plants.  We would eventually live in our own waste and everything would die without nutrients.

Types  of  decomposers- Fungi, Hag  Fish,  Sea  Weed


Adaptations are important because, if an animal doesn't adapt to its surroundings it may be harm by other living objects or the weather conditions may be to harsh for the animal. There are two types of adaptations, structural and behavioral.

*Sargasso Seaweed

Honestly...If organisms from my environment were to be placed into another ecosystem, they would most likely die from too much oxygen, but there are some organisms that might be able to adapt and live on land or in another ecosystem. for instance if a sharks was to be placed into a rainforest, it wouldn't be able to move their fins, and since they are used to breathing underwater, they wouldn't be able to survive.

Natural selection

Definition: Is the process by which certain inheritable traits become more common in a population over successive generations.

Natural selection is important for organisms because without it the important traits that could help that species survive wouldn't be passed down and that species would die out. It also allows favorable traits to be passed on to future generations. This way the animals with the favorable traits can reproduce and survive.

Camouflage is a form of adaptation. The fish who are camouflaged can reproduce, so the trait will be passed onto future generations, this will help the species will survive.  The fish who aren't camouflaged are easily spotted and eaten, this way only the fish with the favorable traits can survive.

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2 years ago

I like your pictures

2 years ago
2 years ago

Looks great...see if you can be a little more specific with some of your abiotic factors.

2 years ago

Thank You and okay I will fix that😊 @dianegunnip

2 years ago

I love your pictures!

2 years ago

thanks😉 @ellenatkins

2 years ago

great list of abiotic factors

2 years ago

thank you! @lindseymeyers

2 years ago

i like the font!!!

2 years ago