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Northern Hardwood Ecosystem Limitation
- 2. OUTLINE MELNHE background Objectives Methods Ongoing projects New projects Research background Objectives Methods Expected results
- 3. MULTIPLE ELEMENT LIMITATION N limitation P limitation Resource optimization theory (Bloom et al. 1985, Chapin et al. 1987) Co-limitation by N and P (Elser et al. 2007) Bormann et al. (1977) Science
- 5. OBJECTIVES Test for co-limitation of nitrogen and phosphorus in aboveground production in young and old northern hardwood stands Evaluate the mechanisms for maintaining co- limitation of N and P Predict long term forest response to anticipated future conditions using a revised and improved MEL model
- 6. MELNHE STANDS Site cut Elev (m) Slope (%) Plots Parent Material C1 1990 570 5-20 5 plots (each 0.25 ha) Mt. Osceola Granite C2 1988 340 15-30 4 plots (each 0.2025 ha) Conway Granite C3 1980 590 8-20 4 plots (each 0.25 ha) Conway Granite C4 1978 410 20-25 4 plots (each 0.25 ha) Conway Granite C5 1976 550 20-30 4 plots (each 0.25 ha) Mt. Osceola Granite C6 1975 460 13-20 5 plots (each 0.25 ha) Conway / Mt. Osceola Granite C7 ~1890 440 5-10 4 plots (each 0.25 ha) Mt. Osceola Granite C8 1883 330 5-35 5 plots (each 0.25 ha) Mt. Osceola Granite C9 ~1890 440 10-35 4 plots (each 0.25 ha) Conway Granite JBM 1985 730 25-35 4 plots (each 0.09 ha) Ammonoosuc Volcanics (andesitic) JBO ~1900 730 30-40 4 plots (each 0.25 ha) Ammonoosuc Volcanics (andesitic) HBM 1971 500 10-25 4 plots (each 0.09 ha) Rangeley Formation Schist HBO ~1910 500 25-35 4 plots (each 0.25 ha) Rangeley Formation Schist HBCa ~1910 500 25-35 2 plots (each 0.25 ha) Rangeley Formation Schist
- 8. DOMINANT SPECIES ACROSS STANDS • Acer saccharum • Fagus grandifolia • Betula alleghaniensis • Fraxinus americana • Prunus pensylvanica • Betula papyrifera • Acer rubrum
- 9. PLOT LAYOUT
- 10. FERTILIZATION TREATMENTS Five nutrient treatments • Nitrogen • NH4NO3 at 30 kg N/ha/yr, half the rate of N mineralization • Phosphorus • NaH2PO4 at 10 kg P/ha/yr, account for readily available P adsorption capacity • Calcium • CaSiO3 at 1150 kg Ca/ha/yr, mimic pre- industrial soil Ca levels • Nitrogen + Phosphorus • Control
- 11. ONGOING EFFORTS…… FIRST FIVE YEARS…… AND BEYOND!
- 12. NEW PROJECTS THIS SEASON Mycorrhizal associations Sap flow rates (N, P, NP, Ca, control) Tea bag decomposition method Carbon stock in fine and coarse woody debris Soil respiration response to Ca
Editor's Notes
- Pace, volume alright No names, maybe my own name on the title page? Add plot numbers to pictures
- Save some space on outline page Don’t read to it verbatum
- Add high rates of nitrogen deposition in stands
- Just write rastetter Don’t say trying to improve model
- Original objectives These were the original objectives
- Mention stand ages and parent materials across sites
- Add stand ages, names, species composition
- Talk about the hubbard brook
- Say wollastonite addition same rate as WS1
- Aboveground growth and productivity Foliar nutrient use efficiency Total soil respiration, microbial respiration Soil nutrient pools Fine root production and biomass Mineral weathering Beech bark disease Decomposition studies Monitoring sap flow (Ca, control) Mention the papers from this year, Craigs and Adams
- Do this is same order as agenda Add in new truffle species and life in bartlett