Organic nitrogen uptake is a significant contributor to nitrogen economy of subtropical epiphytic bryophytes
文献类型：SCI/SSCI论文
| 作者 | Song L.; Lu, H. Z.; Xu, X. L.; Li, S.; Shi, X. M.; Chen, X.; Wu, Y.; Huang, J. B.; Chen, Q.; Liu, S. |
| 发表日期 | 2016 |
| 关键词 | montane cloud forest earliest land plants amino-acid nitrogen boreal forests atmospheric ammonium sphagnum mosses n deposition costa-rica fixation growth |
| 英文摘要 | Without any root contact with the soil, epiphytic bryophytes must experience and explore poor, patchy, and heterogeneous habitats; while, the nitrogen (N) uptake and use strategies of these organisms remain uncharacterized, which obscures their roles in the N cycle. To investigate the N sources, N preferences, and responses to enhanced N deposition in epiphytic bryophytes, we carried out an in situ manipulation experiment via the N-15 labelling technique in an Asian cloud forest. Epiphytic bryophytes obtained more N from air deposition than from the bark, but the contribution of N from the bark was non-negligible. Glycine accounted for 28.4% to 44.5% of the total N in bryophyte tissue, which implies that organic N might serve as an important N source. Increased N deposition increased the total N uptake, but did not alter the N preference of the epiphytic bryophytes. This study provides sound evidence that epiphytic bryophytes could take up N from the bark and wet deposition in both organic and inorganic N forms. It is thus important to consider organic N and bark N sources, which were usually neglected, when estimating the role of epiphytic bryophytes in N cycling and the impacts of N deposition on epiphytic bryophytes in cloud forests. |
| 出处 | Scientific Reports |
| 卷 | 6 |
| 收录类别 | SCI |
| 语种 | 英语 |
| ISSN号 | 2045-2322 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/43302]  |
| 专题 | 地理科学与资源研究所_历年回溯文献 |
| 推荐引用方式 GB/T 7714 | Song L.,Lu, H. Z.,Xu, X. L.,et al. Organic nitrogen uptake is a significant contributor to nitrogen economy of subtropical epiphytic bryophytes. 2016. |
入库方式： OAI收割
来源：地理科学与资源研究所
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