Stable carbon and nitrogen isotopes of the moss Haplocladium microphyllum in an urban and a background area (SW China): The role of environmental conditions and atmospheric nitrogen deposition

Warming and nitrogen addition effects on bryophytes are species‐ and plant community‐specific on the eastern slope of the Tibetan Plateau

“…The background atmospheric N deposition in the region was 0.85 g·m −2 ·yr −1 in 2007 (Liu et al. ), while the mean N deposition was 2.8 and 1.7 g·N·m −2 ·yr −1 in the temperate forest in southwest China and in the coniferous forest in Hengduan mountain, respectively, in year 2000. The maximum N deposition in these two regions is predicted to be 3.6–5.9 and 2.7–4.6 g·m −2 ·yr −1 , respectively, in 2030 (Bobbink et al.…”

Stable nitrogen isotopes (d15N) in thalli of arid vagrant lichen Xanthoparmelia camtschadalis across an altitudinal gradient of the Khangai Plateau of Mongolia

“…Nevertheless, the majority of The data on the altitudinal distribution of d 15 N val ues in OM of bryophytic organisms depending on the habitat altitude confirm that the nitrogen stable iso tope ratio in their tissues simultaneously increases with altitude. The same trend was observed in the southwestern part of China where d 15 N values in both young and old tissues of Haplocladium microphyllum moss increase with an increase in the sampling point altitude (the samples were collected at 990 and 3276 m above sea level) [53]. It should be noted, however, that the lowest sampling point was located on the territory of a city with a large population, that is, the region was enriched in nitrogen containing compounds.…”

δ15N–NH4+ variations of rainwater: Application of the Rayleigh model

“…The average concentration of NH 3 was a little higher than those reported in many cities (Meng et al, 2011 and references within), because the ammonia emission is higher in Guiyang, and/or the error may come from both the calculation itself of software and cloud base height calculated by temperature and relative humidity. According to initial NH 3 concentrations and cloud base height, the atmospheric NH 3 deposition was estimated to be 38.1 kg/ha/year in Guiyang, close to the results of 30.2 kg/ha/year (maximum value of 44.7 kg/ha/year) reported by Liu et al (2008). The contribution of wet deposition to the total ammonium deposition was 49% in Guiyang (Xiao and Liu, 2011), and the ammonium concentration in rainwater was 112.9 μeq/L and the amount of rainfall was 1174 mm (Xiao et al, 2012(Xiao et al, , 2013, resulting in an atmospheric NH 3 deposition of 36.7 kg/ha/year.…”