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Plant Carbon Allocation Spring 2015

Explore the determinants of carbon allocation in Lodgepole pine, including genetics, tree age, seasonal variations, and environmental influences like light, water, and nutrients. Discover the hierarchy of carbon allocation and its implications.

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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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