Cycles in Ecosystems
Can you explain what is being
cycled???
Write what you know to the side of
each slide.
Figure 55.14a
Water
Cycling
Movement over
land by wind
Precipitation
over ocean
Evaporation
from ocean
Precipitation
over land
Evapotranspiration from land
Runoff and
groundwater
Percolation
through
soil
Figure 55.14b
Carbon
cycling
CO2 in
atmosphere
Photosynthesis
Photo- Cellular
synthesis respiration
Burning
of fossil
fuels and
wood
Phytoplankton
Consumers
Consumers
Decomposition
Figure 55.14ca
N2 in
atmosphere
Nitrogen
Cycling
Reactive N
gases
Industrial
fixation
Denitrification
N fertilizers
Fixation
NO3
–
Dissolved
organic N
NH4+
Runoff
NO3–
Aquatic
cycling
Decomposition
and
sedimentation
Terrestrial
cycling
Figure 55.14cb
Nitrogen
Cycling
Terrestrial
cycling
N2
Denitrification
Assimilation
Decomposition
Uptake
of amino
acids
Fixation
in root nodules
Ammonification
NH3
NO3–
Nitrification
NH4+
NO2–