Eco Systems Flashcards
What are Resources
What an organism needs to stay alive, oxygen, food, warmth…
What is an ecosystem
All the organisms and the environment in which they live
What is a Community
All the organisms that live in an ecosystem
What is Interdependent
The way organisms rely on each other for resources
What is a habitat
Where an organism lives
What is an Abudance
A measure of how common something is
What is a food web
A diagram showing the feeding relationship between organisms
What are the resources used by plants
Light, Water, CO2, O2, Warmth, mineral ions
What are the resources used by animals
Food, Oxygen, Water, Warmth, Shelter
How do you calculate population size
Number of organism x
(Total size of area where organism lives/ total area)
What is biomass
Mass of tissue
Why is energy lost when an animal eats another animal
Some energy lost to heating the animal, some in its faeces
What is a Parasitic relationship
Parasite lives on a host, parasites benefit by feeding of off a live host
What is a Trophic relationship
Predator prey, one eats the other (Feeding)
What is a Mutualistic relationship
Both benefits (Give and take)
Why is fish farming bad
too many in small spaces can cause parasite to spread easily, which means fish need to be treated carefully
What does Indigenous mean
Native
What is Eutrophication
Adding more nutrients to an ecosystem
How can Eutrophication result in low oxygen levels in the water
Excess fertilisers enters stream, causing algae to bloom on surface of stream blocking sunlight getting to the plants so they can’t photosynthesise, which means plants decompose, and bacteria use up oxygen during respiration, resulting in less oxygen
What are two adaptations of fleas
Sharp claws to grip onto hair and skin,
Eggs are glued to hair to prevent them falling of
What are two adaptations of Worms
Male and female sex organs
Flat bodies for fast diffusion
What is food security
Having enough access to safe and healthy food at all times
What are agricultural inputs
Artificial additions to agriculture, like fertilisers
What is reforestation
Trees are planted after they have been chopped down
What are field margins
Strips of land where wild plants and animals can live
What do hedgerows and field margins do
They preserve biodiversity
Bloodworms have a high level of haemoglobin in their blood.
Give a reason why this helps them survive in polluted water.
haemoglobin binds oxygen /
increases the rate of diffusion /
polluted water is low in oxygen
