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module 5: biology
energy transfer
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Cards (6)
biomass
:
total
mass
of a
living
material in a given
area
at a given
time
measuring dry mass:
dry sample
in an oven (
heated
)
weighed at regular
intervals
until mass is
constant
shows that all the water has evaporated
GPP
:
gross primary production
total
amount of chemical energy in the plant biomass
NPP:
net primary production
chemical energy
in plant
biomass
taking into account the
loss
from
respiration
equation for NPP
NPP = GPP - R
equation for NPP for consumers :
N =
I
-
F
+
R
I:
ingested food
F:
faeces
+
urine
R:
respiration