Physical (non living) conditions that affect organism distribution (population and habitat)
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ecosystem
Interaction of a community (of living organisms) with abiotic parts of their environment.
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artificial ecosystem example
Fish farms, and planted forests
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biodiversity
Range of different plants and organisms in an ecosystem
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decomposers
Break down dead organisms
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population
Total number of species in an ecosystem
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habitat
Place where an organism lives in the ecosystem
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community
Total number of organisms in an area
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community v population
A population is the total number of one species in an ecosystem
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interdependence
2 or more organisms relying on one another
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What are biotic factors
Caused by organisms and affecting other populations interactions he ecosystems
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grazing impacts
More plant species grow as dominant plants are eaten by animals, so the weaker plants grow as they can get more sunlight and minerals as they aren't being taken up by the dominant plants
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stable community
A community where the biotic and abiotic factors are in balance with that the population sizes remain fairly constant.
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give an example of 2 stable communities
oak forest and tropical rainforests
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different levels of organisation in an ecosystem
indiviudal organisms
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support in an ecosystem
self sufficient, apart from energy which is transferred as light energy from the sun to the plants
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population estimation device
quadrat
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quadrat required practical
place quadrat on ground at random, how is a cactus adapted to be an extremphile, how could you check the distribution of plants in a habitat, stretch a transect line (kinda like long tape) across the area
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decomposers
certain types of bacteria and fungi
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what do decomposers require
oxygen,suitable temperature,suitable pH
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how do decomposers break down dead waste
secrete enxtmes which partly digest waste
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milk practical
get some milk at room temp, cover it and regularly measure its ph over a few days
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what does the carbon cycle descirbe
how carbon is recycled
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water cycle description of
how fresh water circulates between living organisms rivers and the sea
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food relationships
food chains
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Producers,
produces the molecules (usually glucose through photosynthesis) that transport through the food chain
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Flashcard (21)