Energy Transfer in Ecosystem

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by MrReGlog
Last updated 9 years ago


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Energy Transfer in Ecosystem


Sun ---> Producer ---> Herbivore ---> Carnivore/Omnivore (photosynthesis) (food) (food)

-All living organisms need energy .-Animals obtain energy by eating other plants or animals hence they are called consumers .-Whereas green plants obtain light energy from the Sun to make their own food by photosynthesis hence them being a producer.-A food chain shows how energy is transferred through a living system.-any organism that decreases, will affect the whole food chain.

-there will be a decrease in energy after passing down link after link

movement & breathing (energy released)

energy is lost:-through respiration-as heat-carry out activities-in urine and faeces

waste (energy dissipated)

pyramid of biomass!

what have i learnt?

pyramid of number!

-a food chain its a link that passes down energy link by link whereas a food web is more than one food chain itself.-a primary consumer can only be a herbivore but a secondary consumer can either be a carnivore or omnivore.-there wouldnt be any energy left to be transferred down more thn 4links.

It is possible to estimate the mass of all the organisms living in a given area or ecosystem. This estimation is known as the biomass. If the mass of the producers and each type of consumer is recorded, a pyramid can be constructed showing that the biomass of the producers is generally far greater than that of the consumers

We can represent the numbers of producers and consumers co-existing in an ecosystem by constructing a pyramid of numbers. By counting the numbers of organisms in an ecosystem, it is generally found that there is a progressive drop in numbers from producers, to primary and secondary consumers. This decrease in numbers occurs because of the energy losses when one organism feeds on another.

Energy flows through ecosystems from producers to the various levels of consumers. Each time an organism eats another, not all the energy is transferred. Only about 10% of the energy of a producer is transferred to the consumer that eats it. Therefore, there is a progressive loss of energy at each level of a food chain. We can represent the amount of energy at each level as a part of a pyramid.

pyramid of energy!



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