Flashcards in Topic 9- Ecosystems and Material Cycles Deck (22):
Organisms that can reproduce and produce fertile offsprings
Organisms are ...
A living thing
A group of organisms that all belong to the same species
All the organisms that live in a particular habitat
Where an organism lives
The role an organism has in its environment (where it lives, what it does, what it eats)
All the living things within a given area interacting with one another
All living things and non living things (weather, rocks ect.) in a given area
Trophies level is...
A stage or level of animals/organisms in a food chain or web which an organism is feeding
An organism which eats the pervious trophic level to gain energy
An organism which feeds on another organism
Trophic level one is...
An autotroph because it will make its own food
Order of food chain (eg.owl)
1. Producer eg. Plant
2. Herbivore/consumer eg. Insect
3. Omnivore/consumer eg. Mouse
4. Carnivore/consumer eg. Owl
A food chain...
Shows the path of energy from one living thing to another
Energy is lost each trophic level through...
Life processes, respiration (in mitochondria + include equation) used to transfer energy for movement, heat ect. which is not past onto the next trophic level
Energy stored as biomass which makes new cells to grow ect.
Also not all the organism may be consumed/eaten by the consumer
Not all the organism can be digested which becomes waste (faeces)
The mass of living materials are that makes up an organism
Energy is stored in this material
Food chains and webs rarely have more than 4 to 5 trophic levels because...
If chains were longer there would not be an efficient amount of energy passed on for the organism in the higher trophic levels to survive
Energy is lost through trophic levels (see other revision card)
Efficiency = energy transferred to the next trophic level / energy available at previous trophies level
An abiotic factor is...
An environmental factor that may have an effect on yliving organisms
Also non living
A biotic factor is...
Caused by a living organism having an effect on another organism
Examples of abiotic factors are...
Levels of pollutants
Examples of biotic factors are...