3.7.4 Populations in Ecosystems | Baamboozle - Baamboozle

The differences between organisms of different species.

Interspecific variation

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When using a quadrat to estimate population size, we take many samples to ensure that our data is what?

Representative of the population

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The population size of a species that can be supported by the ecosystem

Carrying capacity

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competition between organisms of DIFFERENT species e.g. for food

Interspecific competition

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A group of similar organisms that can reproduce to produce FERTILE offspring

Species

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trap

No points!

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magnet

Take 10 points!

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shark

Other team loses 20 points!

Okay!

lifesaver

Give 20 points!

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The range and variety of genes, species and habitats within a particular ecosystem

Biodiversity

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seesaw

Swap points!

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gold

Win 50 points!

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shark

Other team loses 25 points!

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thief

Give points!

trap

No points!

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star

Double points!

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fairy

Take points!

banana

Go to last place!

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A self contained area including the biotic (living) community and abiotic (non-living) components interacting with one another

Ecosystem

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Two examples of biotic factors that affect the population size of an organism

disease, predation, competition

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Give two assumptions made when using the mark, release, recapture technique to estimate population size

No immigration / migration (Ignore ref to emigration); No reproduction (Ignore ref to death); Idea of mixing; Marking does not influence behaviour

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A method of estimating population size of motile organisms by marking a number of them, releasing them & then counting the number of marked organisms in a second sample

Mark, release & recapture

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Conditions in the environment that limit population size - these can be biotic or abiotic factors.

Limiting factors

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the category of living factors in the environment of an organism that affect population size

Biotic factors

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Competition between organisms of the SAME species e.g. for food or mates

Intraspecific competition

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