Statistics for Ecosystems Definition Quiz

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Definition	Word	% Correct
An organism that breaks down dead organisms releasing nutrients back into the ecosystem	Decomposer	66%
An organism that converts light energy to chemical energy	Producer	63%
Mass of living material	Biomass	59%
An organism that obtains its energy by feeding on other organisms	Consumer	59%
The living components of an ecosystem	Biotic Factors	47%
Non-living conditions in a habitat	Abiotic factors	44%
All the interacting living organisms and the non living conditions in the area	Ecosystem	38%
The final stage in succession, where the community is said to be in a stable state	Climax Community	25%
Conversion of nitrogen gas to ammonium compounds	Nitrogen Fixation	22%
A stage in the food chain	Trophic Level	22%
The first organisms to colonise an area	Pioneer Species	19%
An organic component of soil formed by the decomposition of leaves and other plant material by soil microorganisms	Humus	13%
Conversion of nitrates to nitrogen gas	Denitrification	9%
The progressive replacement of one dominant type of species or community by another in an ecosystem, until a stable climax community is reached	Succession	9%
An organism which speeds up decay by breaking down detritus into smaller pieces	Detritivores	6%
A stage in succession where the artificial or natural factors prevent the natural climax community from forming	Plagioclimax	3%
A seral stage is a stage of succession	Seral Stage	3%
A measure of biodiversity between 0 and 1 that takes into account both species richness and evenness	Simpson's Index of Biodiversity	0%