UMR INRA/UHP Forest Ecology and Ecophysiology, Phytoecology team, Atmospheric Pollution Laboratory, INRA Nancy, Route de l'Arboretum, F-54280 Champenoux, France.
Environ Pollut. 2010 May;158(5):1652-60. doi: 10.1016/j.envpol.2009.12.005. Epub 2010 Jan 4.
Effects of traffic-related nitrogenous emissions on purple moor grass (Molinia caerulea (L.) Moench) transplants, used here as a new biomonitoring species, were assessed along 500 m long transects orthogonal to roads located in two open areas in the Maurienne valley (French Alps). Leaves were sampled during summer 2004 and 2005 for total N-content and (15)N-abundance determination while nitrogen oxides (NO and NO(2)) concentrations were determined using passive diffusion samplers. A significant and negative correlation was observed between plant total N-content, and (15)N-abundance and the logarithm of the distance to the road axis. The strongest decreases in plant N parameters were observed between 15 and 100 m from road axis. They were equivalent to background levels at a distance of about 800 m from the roads. In addition, motor vehicle pollution significantly affected vegetation at road edge, as was established from the relationship between leaf (15)N-abundance, total N-content and road traffic densities.
交通相关氮排放物对沿道路（位于法国阿尔卑斯山毛雷讷谷的两片开阔地）垂直方向 500 米长的样带中紫羊茅（Molinia caerulea (L.) Moench）的影响，本研究中，紫羊茅被用作一种新的生物监测物种，这一影响被评估。2004 年和 2005 年夏季，通过对叶片进行采样，测定总氮含量和（15）N 丰度，同时利用被动扩散采样器测定氮氧化物（NO 和 NO2）浓度。研究发现，植物总氮含量、（15）N 丰度和距道路轴心的对数值之间存在显著的负相关关系。从道路轴心到 15-100 米之间，植物氮素参数的降幅最大，在距道路约 800 米处，这些参数与背景水平相当。此外，机动车污染对道路边缘的植被有显著影响，这可以从叶片（15）N 丰度、总氮含量与道路交通密度之间的关系中看出。
