校园树附生苔藓氮含量与氮同位素特征及其环境指示
Characteristics and Environmental Implication of Nitrogen Content and Stable Isotope in Epiphytic Bryophytes in the Campus
摘要: 为探讨校园苔藓植物氮素特征，对福建农林大学不同功能区(主干道、教学区、生活区和景观区)树附生苔藓植物氮含量和氮同位素值(δ15N)进行了研究。结果表明：树附生苔藓氮含量变化范围为1.43%~3.99%，均值为2.71 ± 0.03%，整体偏高。主干道苔藓氮含量显著低于教学区、生活区和景观区(P < 0.05)。苔藓δ15N值变化范围为−12.26‰~1.78‰，均值为−6.54 ± 0.16‰。生活区苔藓δ15N值比教学区、景观区和主干道明显偏负，而教学区、景观区与主干道差异不显著(P > 0.05)。苔藓氮同位素偏负特征指示了校园大气中的氮来源以生活污水和人畜排泄物(NHx-N)为主，同时未来应考虑交通源氮(NOx-N)排放的影响。本研究为开展苔藓植物监测大气环境提供了基础资料。
Abstract: In order to explore the nitrogen characteristic of moss on campus, the content and isotope value of nitrogen in epiphytic bryophytes were studied from different function areas (main road, teaching, living quarter, and landscape area) in Fujian Agriculture and Forestry University campus. Results showed that the nitrogen content in mosses ranged from 1.43% to 3.99% with the mean value of 2.71 ± 0.03%, reflecting a high nitrogen status. The nitrogen contents of mosses in main road area were significantly higher than those in the areas of teaching, landscape, and living quarters (P < 0.05). Mosses δ15N values varied from −12.26‰ to 1.78‰ with the mean value of −6.54 ± 0.16‰. More negative δ15N values in mosses were observed in living quarters compared to the areas of teaching, landscape, and main road. However, there was no significant difference between teaching, landscape, and main road (P > 0.05). The negative signature of nitrogen isotope in epiphytic mosses suggests that the nitrogen in the atmosphere of campus mainly originates from NHx-N emission of excretory wastes and sewage, and more attention should be paid to the effect of traffic source nitrogen (NOx-N) emission. This research provides baseline information for using moss to monitor atmospheric environment.
文章引用：杨柳生, 熊在秋, 朱子谦, 李晶, 习丹. 校园树附生苔藓氮含量与氮同位素特征及其环境指示[J]. 世界生态学, 2021, 10(4): 487-494. https://doi.org/10.12677/IJE.2021.104055

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