Ocean ecosystem #ecosys2


fish,seahorses,stingray,sea turtles,sea cucumbers,sharks,seaweed,sea urchins,corals,sea sponges,shrimp,lobster,starfish,algae,dolphins,plankton,whales,sea anemone,octopus,squid,crabs,jellyfish                                                                                                                                             



water-  83-0 degrees celsius

minerals in sand-   quartz,chalcedony,magnetite


temperature-  hot,windy,warm,cool,cold



Carrying Capacity:

- the balance between availability of habitat components and the number of animals the habitat can support                                                                         resources needed: food,shelter,water,and space

Sharks' population are decreasing down to approximately 100 million or more each year. Some reasons why they are decreasing is because of the nets that are in the ocean for capturing underwater animals, being hunted down to be sold in markets for their fins and sometimes their bodies,and are also decreasing because of being captured by fishermen for their fins,then being thrown back out in to the ocean alive,so after being released fin-less the sharks in the ocean are left to survive on their own from suffocation,dying from the loss of blood,or either staying alive without being able to swim properly.

Limiting Factors:

-things that can affect/harm the survival of an organism in an environment                        examples: oil spills,predators,environmental pollution,global warming          

As killer whales continue eating more and more seals;they would be would be decreasing because the seals' population would be limited and eventually killer whales would run out of seals to eat and so then die. Killer whales and seals' are also decreasing their populations because of limiting factors like pollution,oil spills and being hunted/fished.Oil spills in the ocean are affecting the killer whales and seals because of the oil which is full of poisonous chemicals that cause the animals to lose the ability to maintain their body temperature by either inhaling the oil,ingesting it, and external exposure through skin and eye irritation. Another limiting factor is plastic pollution which is part of the environmental pollution. Plastic can harm the killer whales and seals by either causing them to die from choking,having intestinal blockage,starvation,and getting entangled in the plastic.

Energy Roles:

-determined by how the organisms gain their energy and how it interacts with other living things in its ecosystem

Producers- are also called autotrophs,they receive their energy from the sun,make their own food through photosynthesis,and provide the most energy that feeds the rest of the ocean ecosystem. examples: seaweed (algae),seagrass,phytoplankton,kelp

Consumers- are also called heterotrophs, they don't make their own food,they feed on other organisms(plants and animals) ,receive their energy by consuming other organisms,and there are 4 types of consumers which are herbivores,carnivores,omnivores,and scavengers.

examples: Herbivores- lobsters,fish,sea urchins,Green Sea Turtles                                                 Carnivores- sharks,dolphins,killer whales,seals                                                                   Omnivores- sea turtles,crabs,dolphins,lobsters                                                                   Scavengers- zooplankton,sharks,marine eels,remoras

Decomposers- organisms that break down wastes and dead organisms and return the nutrients back into the environment. examples: shrimp,bacteria,nematodes,brittle stars

Each of the energy roles each receive their energy from the organism it had consumed.

Producers are vital to the ecosystem because it has the most energy which it gets from the sun to make its  own food through photosynthesis and is the beginning of the food chain/web/pyramid.

Food Chains and Food Webs

Food webs are more realistic than food chains because a food web shows multiple food chains,it shows that an organism doesn't just eat one organism in its ecosystem,and food chains only shows a path that only starts with one producer.

If I remove phytoplankton from my food web it would affect the other populations by causing the other organisms to not have a lot of energy.

Trophic Levels and Energy Pyramids

The pyramid shape shows that as the energy from each trophic level goes to the next the energy gets decreased and becomes less available as it goes up the pyramid .

The producers are in the largest level because it has more energy that it gets from the sun which provides the energy to fuel the rest of the ecosystem and the top predators are in the smallest level because they have the least energy that it gets from the level before it.


Carbon dioxide,water,and sunlight are needed for photosynthesis that will eventually produce glucose and oxygen.

Photosynthesis takes place in the chloroplast of the plant cell.The chloroplast contains chlorophyll which traps the sunlight so it can combine with carbon dioxide and water.


-Tropism is turning or bending movement of an organism toward or away from an external stimulus,such as light,heat,or gravity.                                                examples-  seaweed,seagrass,kelp (phototropism),seagrass(geotropism)

These tropisms help the plants survive by using their adapted sense for phototropism to get the sun's energy to produce their own food and using their adapted sense for geotropism to hold down on the bottom of the ocean or something at the bottom it of the ocean, so it won't float up on to the surface of the ocean and was up on shore and die.

The Role of the Decomposers:

Decomposers are vital in the ocean because they have to break down the dead organisms at the bottom of the ocean to get back the nutrients from them and give it off to the living organisms.If there were no decomposers the effects would be that the ecosystem wouldn't have a lot of nutrients,the soil will not be healthy,and plants would not produce.

Some decomposers that are in the ocean are shrimp,brittle stars,starfish,crabs,sea urchins,and seaweed.


The adaptions purpose is to enable traits so organisms can survive in their ecosystem and there are two types of adaptations structural and behavioral;structural is the physical features of an organism and behavioral is how an organism acts.These adaptations help organisms survive by giving them the features and behaviors that are suitable for the organism in its environment.

Adaptations that plants and animals need in the ocean environment are camouflage,poison/venom,traveling long/deep distances,temperature,communication,contact,light,and symbiosis.

The effects of placing an organism from my ecosystem is that the organism would not get a lot of nutrients it usually gets,it would have to find a way to get a lot of water so it can survive,to find some type of food that it can eat  to live for a while,and it would have to find a new way hide from its new predators.

Natural Selection:

-inheritable traits that become more common in a population over successive generations

Comment Stream

2 years ago

your portfolio looks AWESOME so far! very proud of you! keep up the great work.

2 years ago


2 years ago

Thank You

2 years ago

good job but you did not do step 12 😗

2 years ago

You should be so proud of yourself! You did a great job.