Heavy metals in subalpine and alpine soils of New Hampshire
Heavy metals in subalpine and alpine soils of New Hampshire
复制标题
新罕布什尔州亚高山和高山土壤中的重金属
作者：
W. Reiners;R. Marks;P. Vitousek
北方新英格兰受到远距离空气传播污染物的沉积。该区域的山区生态系统特别容易受到影响，因为地形降水和多风、多云的条件导致沉积率较高。本文研究了不同海拔梯度土壤有机层中Pb和Zn的含量和总量。偏远地区的铅浓度很高，与许多交通繁忙的路边相当。锌浓度下降的范围很广的水平，假定代表自然条件。铅的垂直分布表明，水平仍在上升;海拔分布表明，沉积率最高的亚高山森林，那里有一个结合的大风和充足的拦截植物表面。高海拔生态系统可以作为检测某些污染物的放大系统，并作为了解沉积模式和污染物的生态效应的方便系统，发挥有价值的作用。
Northern New England is subject to deposition of remotely derived air-borne pollutants. Mountain ecosystems of the region are particularly exposed because orographic precipitation and windy, cloudy conditions contribute to higher deposition rates. This study describes the concentrations and total quantities of Pb and Zn in organic horizons of soils distributed over an elevational gradient. Pb concentrations are high for a remote area, and comparable with many heavilytravelled roadsides. Zn concentrations fell within a broad range of levels presumed to represent natural conditions. The vertical distribution of Pb suggests that levels are still rising; the elevational distribution suggests that deposition rates are highest in subalpine forests where there is a combination of high winds and ample interceptive plant surfaces. High elevation ecosystems may serve a valuable role as amplifying systems for the detection of certain pollutants, and as convenient systems for understanding the pattern of deposition and the ecological effects of pollutants.