Welcome to the Quiz!
This quiz contains 10 questions from a mix of 1 subtopics.
What does gross primary production (GPP) represent?
the chemical energy available to the next trophic level after respiratory losses
the total amount of solar energy that plants convert into organic matter
the rate of primary production in a given area and time
the efficiency of energy transfer between trophic levels
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What does the term 'secondary productivity' refer to?
the chemical energy available to the next trophic level after respiratory losses
the efficiency of energy transfer between trophic levels
the total amount of solar energy that plants convert into organic matter
the rate at which consumers convert ingested food into biomass
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What does the formula NPP=GPP−R represent?
net primary production
respiratory losses
gross primary production
ecological efficiency
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What does the formula N=I−(F+R) represent?
energy stored in ingested food
net production of consumers
energy lost in faeces and urine
energy lost through respiration
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What is the difference between a food chain and a food web?
a food chain is a sequence of a producer and consumers, while a food web is a complex network of interconnected food chains
a food chain represents the movement of biomass and energy through various organisms, while a food web does not
there is no difference between a food chain and a food web
a food chain includes producers, while a food web does not
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Which of the following are true about ecological efficiency?
(Select all that apply)
ecological efficiency is always 100%
ecological efficiency is not affected by energy losses between trophic levels
to determine the efficiency of energy transfer between trophic levels, compare the net production or productivity values
ecological efficiency is the efficiency at which biomass or energy is transferred from one trophic level to the next as a percentage
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What happens to biomass and energy content as you move up trophic levels in a food chain?
biomass and energy content decrease
biomass and energy content remain the same
biomass and energy content increase
there is no relationship between trophic levels and biomass or energy content
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Which of the following are true about saprobionts (decomposers)?
(Select all that apply)
saprobionts decompose complex materials in dead organisms into simpler substances
saprobionts produce their own food through photosynthesis
saprobionts are primary consumers
saprobionts release nutrients back into the ecosystem
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What term describes the organisms that produce their own food, such as plants and algae that perform photosynthesis, converting light energy into chemical energy?
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State 3 factors that contribute to energy losses between trophic levels in a food chain.
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