Hb2015 farrell-and-jo-sapflow-np
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Transcript of Hb2015 farrell-and-jo-sapflow-np
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Sap Flow 2015:
Does N or P also affect water use in the MELNHE
plots? Brigid Farrell Isaac Jo
Jessie Smith Nick Hodom
Shoestring/MELNHE ProjectSUNY-ESF
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Background• Both N and P may co-limit primary
production (Rastetter et al., 2013)• Simultaneous additions of N and P
yielded synergistic improvements in primary production (Elser et al., 2007)• Growth responses of separate additions
of N and P are indistinguishable (Elser et al., 2007)• Ca additions increase forest
evapotranspiration (Green et al., 2013)
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Objectives
• Analyze effects of nutrient additions (N, P, N&P, and Ca) by comparing sap flow between treatment plots• Test N&P colimitation within
the context of resource optimization theory
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Methods
• Ca, N, P, N&P, and control plots in 2 different aged stands over 10 day period• Granier method to estimate sap
flow • Baseliner software used to
transform data
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Preliminary Results
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Preliminary Results
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Citations• Elser, J. J., Bracken, M. E., Cleland, E. E., Gruner, D. S., Harpole,
W. S., Hillebrand, H., Smith, J. E. (2007). Global analysis of nitrogen and phosphorus limitation of primary producers in freshwater, marine and terrestrial ecosystems. Ecology Letters, 10, 1135-1142.• Green, M. B., Bailey, A. S, Bailey, S. W., Battles, J. J., Campbell, J.
L., Driscoll, C. T., . . . Schaberg, P. G. (2013). Decreased water flowing from a forest amended with calcium silicate. Proceedings of the National Academy of Sciences, 110(15), 5999-6003.• Rastetter, E.B., Yanai, R. D., Thomas, R. Q., Vadeboncoeur, M. A.,
Fahey, T. J., Fisk, M. C.. Hamburg, S. P. (2013). Recovery from disturbance requires resynchronization of ecosystem nutrient cycles. Ecological Applications, 23(3), 621-642.
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Acknowledgments
• Sophie Harrison• Mariann Johnston• Michele Pruyn• Matt Vadeboncoeur• Ruth Yanai• Jerome Barner• Shoestring Crew