Lecture 11 Feb 27.pdf - Lecture 11 Feb 27 March 5 2019...

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Quiz takeupSupply curve changes with ambient CO2 and conductanceShort term effectLight level reduced, less photosynthesis, higher CiStomata close bc of higher CiLonger termPhotorespiration Better or worse than todayRubisco needed to be in answerHigher temp, rubisco higher affinity and O2 more solubleNo way to tell - okay to sayHigher CO2 probably better answer2 things cancel outMultiple choiceLowerMoreLower - shade leaves more chlorophyll binding proteins, bPEP carboxylase - C4 plants - 4 carbon first productCanopy absorptionPlant community scaleTop = more completeAbsorption = incident light minus transmitted (e-kLAI) minus reflected (ρC)Canopy not black - greenOur model easier to remove reflectanceTransmitted - no leaf in wayAbsorbed = interceptedLecture 11 Feb 27March 5, 201912:04 PMPBIO 3110 Page 1
K = 1Sun overhead,, leaf area horizontal and randomly distributedUniform leaf angle, but any directionLeaf area not horizontalAngle up - less light interceptedShadow cast twice as bigNeed 2x as much leaf area with 60 degree

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