Date post: | 15-Apr-2017 |
Category: |
Environment |
Upload: | melnhe |
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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
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)
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
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
Preliminary Results
Preliminary Results
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.
Acknowledgments
• Sophie Harrison• Mariann Johnston• Michele Pruyn• Matt Vadeboncoeur• Ruth Yanai• Jerome Barner• Shoestring Crew