Sari Juutinen, Tim Moore, Allison de Young, Anna M. Laine, Margaret Kalacska Mandy Chong, Jill L. Bubier
Proceedings of the 14th International Peat Congress
change, n-deposition, peatland, photosynthesis, vegetation
Theme X. Peatland carbon budgets and greenhouse gas (GHG) fluxes
We studied the responses of height increment and photosynthesis of Sphagnum capillifolium and Polytrichum strictum to 5 years of elevated N deposition at a bog. Initially, N addition increased the growth rate of both species, but growth of S. capillifolium in the high N treatment ultimately decreased to less than the control. P. strictum had still slightly higher growth and noticeably increased biomass in the N treatments than in the control in the 5th treatment year. Photosynthesis per ground area responded positively to biomass increase by P. strictum.