MYTUTOR SUBJECT ANSWERS

1633 views

Why do energy and biomass decrease at successive stages of the foodchain?

Energy is transferred throughout the food chain as animals at lower trophic levels are consumed by those at higher trophic levels. In every living organism, energy is taken in as food. But when one organism eats another, only around 10% of this energy is transferred to the higher organism. So…where does this surplus energy go?

There are three main ways in which energy is output in every organism. These are:

RESPIRATION to generate energy for movement and organ functioning

EXCRETION as faeces, urine or gas

TISSUE (biomass) generation

When organisms are consumed in the foodchain, only energy stored as TISSUE is transferred. Therefore, at each stage of the food chain, less energy and biomass is transferred between organisms than at the previous trophic level.   

Katie H. A Level Geography tutor, GCSE Maths tutor, GCSE Biology tuto...

1 year ago

Answered by Katie, a GCSE Biology tutor with MyTutor

Still stuck? Get one-to-one help from a personally interviewed subject specialist

184 SUBJECT SPECIALISTS

£18 /hr

Rachael T.

Degree: Biosciences (Bachelors) - Durham University

Subjects offered: Biology, Physics+ 2 more

Biology
Physics
Maths
Art

“About me: Hello, I’m a Biosciences student at Durham University. I love science and maths , though I also have a passion for drawing! I have spent the last year volunteering as a tutor (for GCSE maths) and have thoroughly enjoyed it! I...”

£18 /hr

Gabriella O.

Degree: Law (Bachelors) - Durham University

Subjects offered: Biology, Maths+ 3 more

Biology
Maths
Chemistry
.LNAT.
-Personal Statements-

“I am Gabriella and I am a 3rd year law student at Durham University. I love learning and would like to share this passion with you. I believe it important for everyone to achieve their best. Although I am studying law I took maths and ...”

£22 /hr

Jon S.

Degree: Economics & Bioscience (Bachelors) - Exeter University

Subjects offered: Biology, Maths+ 1 more

Biology
Maths
Economics

“I'm a first year student at Exeter University studying  Bioscience & Economics. I've enjoyed teaching for over a year now and I'm hoping my tutorials engage you with your subject, or at the very least help you get the grade you are lo...”

About the author

Katie H.

Currently unavailable: until 04/11/2015

Degree: Geography (Bachelors) - Oxford, St Catherine's College University

Subjects offered: Biology, Maths+ 2 more

Biology
Maths
Geography
-Personal Statements-

“Recent Oxford graduate with specialism in Geography and university applications. ”

MyTutor guarantee

You may also like...

Posts by Katie

What are 'Milankovitch cycles'?

Why do energy and biomass decrease at successive stages of the foodchain?

Other GCSE Biology questions

What is the difference between aerobic and anaerobic respiration?

Explain how blood is pumped around the body

What is a pathogen?

What happens to the blood when it enters the heart?

View GCSE Biology tutors

Cookies:

We use cookies to improve our service. By continuing to use this website, we'll assume that you're OK with this. Dismiss

mtw:mercury1:status:ok