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Plant Carbon Allocation Spring 2015

Plant Carbon Allocation Spring 2015. What Determines C Allocation?. Genetics Age of tree Time of Year (e.g., growing season) Environmental Factors Light, water, nutrients. Potential Carbon Allocation (in order of importance). Respiration Structure Storage Defense Reproduction.

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Plant Carbon Allocation Spring 2015

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  1. Plant Carbon AllocationSpring 2015

  2. What Determines C Allocation? • Genetics • Age of tree • Time of Year (e.g., growing season) • Environmental Factors • Light, water, nutrients

  3. Potential Carbon Allocation(in order of importance) • Respiration • Structure • Storage • Defense • Reproduction

  4. C Allocation: Lodgepole pine 1: High priority 4: Low priority After Waring & Pitman, 1985

  5. Seasonal Carbon Allocation

  6. Mean annual precipitation (mm) 3000 2000 1000 0 Picea sitchensis 500 400 300 Mean monthly Precipitation (mm) 200 A 100 D E C 0 F 0 50 100 150 200 250 300 350 B Day of year Juniperus occidentalis Pinus Ponderosa Tsuga heterophylla/ Pseudotsuga menziesii Western US Oregon Transect

  7. Oregon Transect[47% of GPP becomes NPP!]

  8. Coastal Western-hemlock 15 Douglas-fir 10 NPP (Mg ha-1 y-1) Ponderosa Pine 5 Sagebrush 0 +20 0 -20 -40 -60 -80 -100 -120 Water Balance (cm) Effect of Water on NPP

  9. Carbon budget thru time

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