B7.2 Organisation of an ecosystem Flashcards
What is a producer?
A photosynthetic organisms that produces biomass.
What do all food chains begin with?
Producers
Give two examples of a producer.
Green plants and algae.
What does a producer make? How?
Glucose, through an exothermic chemical reaction known as photosynthesis.
Name 2 methods used by ecologists to determine the distribution and abundance of species in an ecosystem.
Random and systematic sampling.
Name 3 types of consumers and what they eat.
“1. Primary consumers eat producers.
- Secondary consumers eat primary consumers
- Tertiary consumers eat secondary consumers”
What is a predator?
A consumer that kills and eats other animals.
What are prey?
An animal that is killed and eaten by predator.
Why are all materials in the living world recycled?
To provide the building blocks for future organisms.
What uses carbon dioxide in the atmosphere?
Plants during photosynthesis.
State three processes which return carbon from organisms to atmospheric carbon dioxide.
“1. Respiration – releases carbon dioxide.
- Release (carbon containing) waste – microorganisms decompose this and respire – releases carbon dioxide.
- Death – microorganisms decompose the body and respire – release carbon dioxide.”
Where does the fresh water for animals and plants on land come from?
Continuous evaporation of water from oceans and precipitation over land.
State 3 factors which may affect the rate of decay of biological material.
“1. Temperature
- Water
- Oxygen availability”
What is compost used for by gardeners and farmers?
Used as a natural fertiliser for growing plants and crops.
What is a biogas generator and how does it work?
A generator used to anaerobically decay biological material which produces methane gas as a fuel.
