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Energy; respiration and photosynthesis

Discussion of the distribution and abundance of living organisms and how these properties are affected by interactions between the organisms and their environment

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Energy; respiration and photosynthesis

Postby JoElgar » Thu Jan 10, 2013 5:09 pm

Hi guys,

I have a question concerning this statement about energy losses in food chains:

"Any energy transferred in respiration is lost to the environment or used in movement etc. and so is no longer available to subsequent organisms in the food chain and therefore is considered a loss"

Surely some of the energy generated from respiration contributes to the growth of an organism, for example increasing the biomass of a plant, which would therefore remain in the food chain to be consumed by other organisms.
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Postby AlexJohns » Tue Jan 15, 2013 4:05 am

Hello Members,

Living cells respire. Aerobic respiration is the chemical reaction used to release energy from glucose. It is called aerobic because oxygen from the air is also needed. Plant cells respire, just as animal cells do. If they stop respiring, they will die. Remember that respiration is not the same as breathing, so take care - plants do not breathe.


Thanks and Regards,
Alex Johns
Last edited by JackBean on Tue Jan 15, 2013 7:19 pm, edited 1 time in total.
Reason: link removed
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Postby JackBean » Tue Jan 15, 2013 7:20 pm

Are you sure you have read the question? That doesn't seem as answer to me :roll:
http://www.biolib.cz/en/main/

Cis or trans? That's what matters.
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Postby animartco » Sat Jun 08, 2013 12:45 pm

Again this seems a badly worded question with movement added as an afterthought. There is quite a lot of energy expended in moving breathing growing etc, which, being energy, cannot return to the food chain. It is therefore rightly counted a loss. Which means that for the system to continue, that energy must be replaced. I am sure you can guess how this is done.
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Postby jeffz » Thu Jul 18, 2013 2:30 am

Honestly I do not understand what actually your question is. I do not think that energy get end as it is constantly being used in producing food and to make a working food chain. It is better to say that energy get replaced but not lost. Hope you understand.
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Postby animartco » Sat Sep 07, 2013 3:47 pm

Putting it simply every movement we make expends energy which Leaves our system. i.e. is lost. We replace it by eating. The same thing is happening in an entire ecosystem. WE know how the ecosystem replaces that energy, but there is the question of what happens to the expended energy that is lost. It is in the form of electricity so perhaps it doesn't actually leave the Earth, but is collected in the magnetosphere? yes where does it go. Anybody?
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Re: Energy; respiration and photosynthesis

Postby pathfinder » Wed Sep 11, 2013 2:07 am

well........ to begin with the famous law of energy: (very well known fact), energy is neither created or destroyed, it only transforms ......so certainly this energy we're talking about has transformed to another form.........just throwing a thought on the table......i think this energy is in the wind, which is why in some make of wind mills, have a purpose to produce electricity .the wind mill is actually an organ to transform energy in the wind to electric energy. this is also the same for the energy in water, the reason, is why we have hydro dams........so , in an ecosystem. the energy that is lost.....transforms to a neutral state, where it awaits transformation by certain phenomena, eg: the hydro dam, windmills, etc..this transformation to a neutral state could be its collection in the MEGNETOSPHERE (as mentioned by animartco).........

this is just an opinion, so, i hope i do not mislead anyone.....
so, what do you think about this points????
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Postby pathfinder » Wed Sep 11, 2013 2:14 am

i allso have a question.........

does the sun produce energy, or does it transform energy from one state to light energy ???
if it transforms energy, then, at what state was the previous energy in, before it was transformed into light energy ???

where does heat in the sun get its energy from?
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