The  Ocean  Ecosystem


Fishes, Shark, Whales, Squids, Seahorses, Dolphins, Etc.


Water, Rocks, Algea, Sand, Etc.

Carrying capacity

Definition: The limit of individual organisms of a species that a habitat can support.

 what it needs to survive

Food, water, shelter, and space.

               Changes over Time

Your ecosystem could change over time. You could begin with a lot of crabs, and then a type of species, which is the crabs food, die off, leaving the crabs to starve, then die, etc.

                            Limiting factors

resources that limit the growth, abundance, or distribution of an organism or a population of organisms in an ecosystem.

Ex: Pollution, disease, Tropic storms, etc.

Limiting factors can affect predators to. If a disease gets to the prey the predator doesn't have anything to eat. Both the predator and prey die off.

Energy Roles

                                 Energy Roles

Producers(make their own food): Seaweed

Primary Consumers(depend on producers): krill

Secondary Consumer(get their energy from primary consumer): fish

Tertiary Consumer(top of the food chain): Dolphin

    Food Web vs. food chain

Food Web is better than a food chain because a food chain shows only simple things (as shown above) and a food web shows more organisms and the different things they eat (as shown below).

                       Energy pyramid


Co2+H2o---->c6 H12 O6+O2

You need Sunlight, water, and oxygen for photosynthesis to occur.

Photosynthesis happens in a plant's cells Chloroplast.



tropisms mean growth or turning movement of a biological organism, usually a plant, in response to an environmental stimulus.

ex: seaweed (producer)


Decomposes are very important to the ocean ecosystem. Why? Because when a fish dies or some type of sea animal, the body can not just stay there or else our sea would be nastier than it already is. We need these Decomposers because they feed on bacteria, and break down unnecessary items in our ecosystems.

Some Decomposers in the ocean ecosystem can be Marine Worms, Fungi, and Echinoderms.

This is a Echinoderms also know as the sea star, brittle star, and sand dollar

Comment Stream

2 years ago

what tropism does seaweed exhibit? looks good so far! keep up the good work.