Nitrogen utilization by Hylocomium splendens in a boreal forest fertilization experiment. Forsum, A., Dahlman, L., Nasholm, T., & Nordin, A. Functional Ecology, 20(3):421–426, June, 2006. Place: Hoboken Publisher: Wiley WOS:000238185400002doi abstract bibtex 1. Nitrogen uptake in the terricolous bryophyte Hylocomium splendens (Hedw.) B.S.G. was studied in a boreal forest long-term N-treatment experiment including control plots, N-addition plots (50 kg N ha(-1) year(-1) for 8 years) and recovery plots (50 kg N ha(-1) year(-1) for 5 years and thereafter no N addition for 3 years). 2.A main objective was to explore whether the N treatments changed bryophyte uptake of different inorganic and organic N forms. In addition, we estimated the contribution of N from throughfall precipitation to the bryophyte N supply. 3. The results demonstrated that bryophyte N uptake was similar in all the long-term N-treatment plots. Hylocomium splendens took up more N-15 labelled NH4+ than NO3- or glycine when these N forms were applied in situ by the spraying of solutions with N concentrations similar to those in precipitation. 4. Analysis of the precipitation collected beneath the closed tree canopy from late May to early October revealed that it contributed 2.0 kg N ha(-1) during the period studied, distributed between NH4+ (78%), amino acid N (17%) and NO3- (5%). 5. The study highlights that, in addition to analyses of NH4+ and NO3- (normally included in standard environmental monitoring of precipitation), analysis of amino acid N must be performed to account fully for the precipitation N input to bryophytes in boreal forest ecosystems.
@article{forsum_nitrogen_2006,
title = {Nitrogen utilization by {Hylocomium} splendens in a boreal forest fertilization experiment},
volume = {20},
issn = {0269-8463},
doi = {10.1111/j.1365-2435.2006.01127.x},
abstract = {1. Nitrogen uptake in the terricolous bryophyte Hylocomium splendens (Hedw.) B.S.G. was studied in a boreal forest long-term N-treatment experiment including control plots, N-addition plots (50 kg N ha(-1) year(-1) for 8 years) and recovery plots (50 kg N ha(-1) year(-1) for 5 years and thereafter no N addition for 3 years). 2.A main objective was to explore whether the N treatments changed bryophyte uptake of different inorganic and organic N forms. In addition, we estimated the contribution of N from throughfall precipitation to the bryophyte N supply. 3. The results demonstrated that bryophyte N uptake was similar in all the long-term N-treatment plots. Hylocomium splendens took up more N-15 labelled NH4+ than NO3- or glycine when these N forms were applied in situ by the spraying of solutions with N concentrations similar to those in precipitation. 4. Analysis of the precipitation collected beneath the closed tree canopy from late May to early October revealed that it contributed 2.0 kg N ha(-1) during the period studied, distributed between NH4+ (78\%), amino acid N (17\%) and NO3- (5\%). 5. The study highlights that, in addition to analyses of NH4+ and NO3- (normally included in standard environmental monitoring of precipitation), analysis of amino acid N must be performed to account fully for the precipitation N input to bryophytes in boreal forest ecosystems.},
language = {English},
number = {3},
journal = {Functional Ecology},
author = {Forsum, A. and Dahlman, L. and Nasholm, T. and Nordin, A.},
month = jun,
year = {2006},
note = {Place: Hoboken
Publisher: Wiley
WOS:000238185400002},
keywords = {amino acids, amino-acids, ammonium, arginine, atmospheric deposition, canopy interactions, growth, nitrate, organic nitrogen, pinus-sylvestris, responses, soluble carbohydrates, sphagnum, throughfall, vegetation},
pages = {421--426},
}
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In addition, we estimated the contribution of N from throughfall precipitation to the bryophyte N supply. 3. The results demonstrated that bryophyte N uptake was similar in all the long-term N-treatment plots. Hylocomium splendens took up more N-15 labelled NH4+ than NO3- or glycine when these N forms were applied in situ by the spraying of solutions with N concentrations similar to those in precipitation. 4. Analysis of the precipitation collected beneath the closed tree canopy from late May to early October revealed that it contributed 2.0 kg N ha(-1) during the period studied, distributed between NH4+ (78%), amino acid N (17%) and NO3- (5%). 5. 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Nitrogen uptake in the terricolous bryophyte Hylocomium splendens (Hedw.) B.S.G. was studied in a boreal forest long-term N-treatment experiment including control plots, N-addition plots (50 kg N ha(-1) year(-1) for 8 years) and recovery plots (50 kg N ha(-1) year(-1) for 5 years and thereafter no N addition for 3 years). 2.A main objective was to explore whether the N treatments changed bryophyte uptake of different inorganic and organic N forms. In addition, we estimated the contribution of N from throughfall precipitation to the bryophyte N supply. 3. The results demonstrated that bryophyte N uptake was similar in all the long-term N-treatment plots. Hylocomium splendens took up more N-15 labelled NH4+ than NO3- or glycine when these N forms were applied in situ by the spraying of solutions with N concentrations similar to those in precipitation. 4. 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