Living World Flashcards
(13 cards)
Organism that breaks down and obtains energy from dead organic matter
Decomposer
A biological community of interacting organisms and their physical environment
Ecosystem
A linear relationship of biological relationships from producer to final consumer
Food chain
A community of organisms where there are several interrelated food chains
Food web
An organism that eats another organism
Consumer
An organism that uses a primary energy source to conduct photosynthesis
Producer
Living things that interact with the non-living parts in an ecosystem
Biotic
Non-living parts that interact with the living parts in an ecosystem
A-biotic
Why does the biomass decrease between each level in the food chain?
-the whole organism isn’t eaten (eg feathers)
-used in movement and respiration
-lost in excretion
What is bioaccumulation
Toxins accumulate the top
What is a natural change affecting Slapton Ley ecosystem?
Shingle bar is being eroded by sea- could be contaminated by sea water- increased salinity
High average temps last 10 years- growth of algae
What are human changes affecting Slapton Ley?
High average temps last 10 years- growth of algae
In last 15 years high numbers of tourists-scare away herons- increase perch
Fishing banned 2005- more perch, less stickleback
Arable farming-chemical runoff from fertiliser and pesticides- eutrophication
Where is Slapton Ley?
The freshwater lagoon is on the south-west coast of U.K.
