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Copyright 2009 Pearson Education, Inc.
2013 Pearson Education, Inc.
PowerPoint Lecture prepared by
Jill FeinsteinRicland !o""unity !olle#e
Fourth Edition
BIOLOG!cience "or Li"e # $ith Physio%ogyCo%%een Be%& '
(irginia Borden )aier
ChapterChapter55
Life in the GreenhousePhotosynthesis and Global Warming
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5.1 The Greenhouse Effect
Global warming is the progressi*e increase o"
Earth+s a*erage teperature.
E""ects o" g%o-a% $aring
/ise in sea %e*e%s G%o-a% e%ting o" g%aciers
Loss o" ha-itat "or teperaturesensiti*e species
)ore se*ere stors
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5.1 The Greenhouse Effect
Greenhouse effect is the i1ture o" car-on dio1ide and
other greenhouse gases in the atosphere. !un%ight $ars the
sur"ace o" the Earth.
)ost o" the $arth radiates into space.
!oe o" the $arth is a-sor-ed -y gases in theatosphere, a&ing
the Earth $arer.
hese gases are $hat &eeps the earth a $ar p%ant, -ut in
e1cess these gases cause g%o-a% $aring.
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5.1 The Greenhouse Effect
Heatis the tota% aount o" energy in a su-stance.
Temperatureeasures the intensity o" heat 3 ho$rapid%y o%ecu%es
are o*ing.
Earth+s $ater p%ays a a4or ro%e in oderating
teperatures.
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5.1 The Greenhouse Effect
5ater has a high capacity to a-sor- and re%ease
heat, due to hydrogen -onding -et$een o%ecu%es.
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5.2 The Flow of arbon
Car-on cyc%es -et$een %i*ing organiss, the
atosphere, -odies o" $ater, and the soi%.
Fossi% "ue%s are stored car-on that contri-ute to
increase car-on dio1ide re%ease
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5.2 The Flow of arbon
)easureents o" car-on dio1ide "ro 6ntarctic ice
cores sho$s that it has -een increasing in theatosphere o*er the
past 70 years.
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5.2 The Flow of arbon
8ata "ro ice cores sho$ present %e*e%s o"
car-on dio1ide are the highest in the %ast00,000 years.
eperature and aount o" car-on dio1ide
are corre%ated
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BioF%i1 Car-on Cyc%e
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5.! an Photosynthesi "educe the "is# of GlobalWarming$
Photosynthesisis the process -y $hich p%antsand other
icroorganiss trap %ight energy "ro
the sun.
Photosynthesis ta&es Carbon dioxideandco-ines it $ith water,
using light energyto
produce glucoseand oxygen.
Photosynthesis is done -y p%ants and soe-acteria, -ut not -y
ania%s or "ungi.
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5.! an Photosynthesi "educe the "is# of GlobalWarming$
Photosynthesis occursin organe%%es ca%%edchloroplasts.
Stroma thic& "%uidinside ch%orop%asts.
Thylakoids dis&%i&ee-rane structures
that gi*e the ch%orop%ast ore sur"ace area. !ur"ace o"
thy%a&oid is co*ered $ith chlorophyll
pigent o%ecu%es
Ch%orophy%% a-sor-s %ight energy "ro the sun
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Photosynthesis is a cheica% reaction
:CO2; :
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5.! Photosynthesis ( The Light "eactions
Light reactions thylakoids!
Produces o1ygen, 6P and >68P
