Ecological Pyramids - Ms. Tara Davis

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Ecological Pyramids

How does energy Row through an ecosystem?

Every organism in an ecosystem is either eating or being eaten. When cows eat grass, they obtain some of the energy that the grass transferred from the sunlight it absorbed. If cows could carry out photosynthesis, would they have access to more energy than they get as herbivores? Which organisms in an ecosystem require the most energy to sustain life?

Model 1 - Pyramid of Energy

Values in rhe pyramid are

.

per square merer per year.

30

t-e(fior1 CcYISVvYI.Rr.S

20

_...,____ Secovido.nJ canfvtt?Y1Pr.S

/) 0

\)riVVl6'ir0 [(IVlfVVVl-tVf .J-

25,500 kcal

Oak tree leaves (producer)

pn:,dvcevS

- ----------------------~

r

I

Sunlight hitting Earth's surface ~ 3,190,000 kcal

___________________________

J :

-

1. A unit used to measure energy is the kcal.

a. What is the source of all energy in the pyramid in Model 1?

ln-e ......evS.ve.s'I~

th

i V1

eI,rree

(;\

,svi 'f

t fh.e

&701/1-r:}h ..&1..err:11

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