Biotic and Abiotic Factors in My Ecosystem
Biotic Factors: living things in an ecosystem
- Sea Turtles
- Sea lions
- Coral reefs
- Sea grass
- Sea anemone
Abiotic features: nonliving things in my ecosystem.
- Salt water
- Temperature of water
- Underwater volcanos
- Water curennts
Carrying Capacity:The largest number of individuals of one species that an environment can support. An organism needs food, shelter, water, and space to survive.
Carrying Capacity and Changes in Population
There are only so many recourses in an ecosystem. So when there are a lot of fish, there won't be enough food, shelter, or space for all of them, so many will die. The ones who survive will reproduce. Then that year there wont be as many fish, so most will survive, but the next year, there wont be enough recourses. this is a cycle.
Sharks prey on sea lions. So if the sea lion population significantly decreased, then so would the shark population would decrease.
Limiting Factors and Predator/Prey Relationship
Limiting Factors: any factor or condition that limits the growth of a population
Food webs are more accurate than food chains because they show things eat multiple things and multiple things eat them.
Food Chains/Food Webs
There are different energy roles in a energy pyramid. There are Plants, Herbivores, Carnivores, and Top carnivores.
If we were to take out the shark in our food web, the large fish would Become overpopulated and in return the small fish would be under populated.
Plants: make their own food through photosynthesis They get there energy from the sun. (ex. algae)
Herbivores: Get energy by eating plants and only plants. (ex. krill)
Carnivores: Get energy by eating meat. (e. sharks)
Omnivores: Get their energy by eating both meat and plants. (ex. parrot fish)
Trophic Levels and Energy Pyramids
Plants are important because that is where the pyramid starts. they get the energy from the sun, and then Herbivores and omnivores get energy from them, and carnivores and omnivores get energy from them
Level one (producers) 1,000 kc
- sea anemone
- sea weed
Level two (Herbivores) 100kc
Level Three (Carnivores and omnivores) 10kc
- small fish
- Large fish
Level Four (Carnivores and omnivores) 1kc
An energy pyramid is shaped as it is because it shows where the energy is going. the energy is larger at the bottom because that is where the energy begins.
CO2+H2O (with sunlight) = C6H2O6
Photosynthesis needs these things to take place
- Water (H2O)
- Carbon Dioxide (CO2)
Two things are produced when a plant photosynthesizes
- Glucose (C6H12O6)
- Oxygen (O2)
It happens when carbon dioxide, radiant energy, and water are combined in a plant. with the help of the pigments in the choroplasts it create glucose. (C6H12O6). this is stored for later use. it is also passed on to the consumer that eats the plant.
It goes radiant energy to chemical energy.
Ex. of Tropism
- Coral growing upright
- most sea plants grow near the surface to be within reach of sunlight
Tropisms: the turning or bending movement of an organism towards or away from an external stimulus such as light, gravity, or heat.
These plants tropisms allow them to get sunlight for photosynthesis
The role of Decompposers
In every ecosystem, there are decomposers. Decomposers break down all the dead things in the ecosystem and return the nutrients to the earth. Without decomposers there would be waste and dead animals everywhere.
- sea slugs
- sea worms
We need adaptations in our ecosystems because they help animals evolve and stay alive. without adaptations they wouldn't be able to eat certain things, or hunt certain things. there are physical and behavior adaptations. Ex.
- seaweed is tough so it isn't ripped up
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 dolphin was to be placed into a tundra, it wouldn't be able to move their fins, and since they are used to brething underwater, they wouldn't be able to survive.
Natural Selection: The process by which inheritable traits are passed on through successful future generations.
Natural selection is important because it allows favorable traits to be passed on to future generations. This way the animals with the favorable traits can reproduce and survive.
One form of adaptations is camouflage. The fish who aren't camouflaged are easily spotted and eaten. this way only the fish with the favorable traits can survive. then the fish with camouflage can reproduce, so the trait will be passed onto future generations. this will help the species will survive.