Ecosystems Flashcards
(40 cards)
What do organisms compete for? 
 Food
 Water
Habitat
 Mates
What are abiotic factors? 
Nonliving factors 
Examples of abiotic factors 
Light and temperature 
What biotic factors? 
Living factors 
Examples of living factors 
Predators and prey 
What can you use to estimate the size of a population in a certain area? 
Quadrats 
How would you use a quadrat? 
Sampling 10% of an area 
Recording data
Calculating a mean 
Multiplied by whole area 
What are food chains? 
Shows the direction of biomass transferred between organisms 
What are producers? 
Organism that uses sunlight to create energy 
Examples of producers 
Plants and algae 
What are primary consumers? 
Organisms that eat the producers 
What’s a secondary consumers? 
Organisms that eat primary consumers 
What are tertiary consumers
Organisms that eat secondary consumers 
What’s a Apex predators? 
Animals at the top of the food chain that have no natural predator 
Our organisms organised 
Trophies levels
What is potable water?
Water that is safe to drink 
How to obtain potable water 
Take it from freshwater sauce, then filter it to remove large insoluble particles then sterilise it using UV
How is Nitrogen converted into nitrates
By nitrogen fixing bacteria 
How is protein converted into ammonia 
Through other bacteria and fungi during decomposition 
How is ammonia converted into nitrates? 
Nitrifying bacteria 
How are nitrates used by plants and why 
Enter plants through roots and used for growth
How are nitrates turned back to nitrate gas? 
By denitrifying bacteria 
What happens when too much nitrate is used to help crops grow? 
Water from rain causes nitrogen to run into Ponds and Lakes
causing on the surface to blame we stopped light from reaching underwater plants 
These plants, then die
The bacteria feeding of the dead plants use up oxygen in the water
Animals in the water have no oxygen 
What is biodiversity? 
The species of organisms by existing ecosystem 
