AS Marine Science - key terms in marine ecology

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Ecosystem
Living organisms and the physical and chemical factors with which they interact
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Habitat
A place where an organism lives
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Population
Organisms of the same species living in the same area
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Community
All the different species living in a habitat at the same time
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Species
group of similar organisms that can interbreed and produce fertile offspring
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Biodiversity
The number of different species in an ecosystem
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Ecological niche
The role of an organism within an ecosystem, taking into account its relationship with other organisms
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Symbiosis
A mutually beneficial relationship between two organisms; e.g. coral and zooxanthellae
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Parasitism
A relationship between two organisms which benefits the parasite at the expense of the host; e.g. tuna and nematodes
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Primary producer (autotroph)
An organism that produces its own food / energy; includes photosynthetic plants/algae and chemosynthetic bacteria
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Consumer
An organism that obtains its energy requirements by feeding on other organisms
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Predator
An animal that catches, kills and eats another animal
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Prey
An animal that is eaten by predators
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Trophic level
‘Feeding levels’ in a food chain/web; position of an organism in the food chain/web
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Succession
The change in community structure over time; e.g. Tevnia and Riftia
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Other cards in this set

Card 2

Front

A place where an organism lives

Back

Habitat

Card 3

Front

Organisms of the same species living in the same area

Back

Preview of the back of card 3

Card 4

Front

All the different species living in a habitat at the same time

Back

Preview of the back of card 4

Card 5

Front

group of similar organisms that can interbreed and produce fertile offspring

Back

Preview of the back of card 5
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