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首页> 外文期刊>Journal of Environmental Management >Initial effects of light armored vehicle use on grassland vegetation at Fort Lewis, Washington
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Initial effects of light armored vehicle use on grassland vegetation at Fort Lewis, Washington

机译：轻装甲车辆使用对华盛顿路易斯堡的草地植被的初步影响

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摘要

Sustainable use of military training lands requires understanding and prediction of the effects of military vehicles on vegetation. We examined the initial impacts of an 8-wheeled, light armored vehicle (LAV) on grassland vegetation at Fort Lewis, Washington. The LAV drove replicate spiral paths at two starting velocities, 10.3 and 5.1 ms(-1). The disturbed width (width of ground impacted by the tires) increased as turning radius decreased, but was unaffected by vehicle velocity. An inverse-exponential model predicted disturbed width (r(2) = 0.68) at all turning radii for both velocities combined. In low-velocity spirals, and for straight tracking (turning radius > 40 in) and moderate turns (radius 20-40 m) in high-velocity spirals, all vegetation damage was imprint (plants flattened by wheels). During sharp (radius < 20 m), high-velocity turns, most or all of the disturbed width was scraped free of surface vegetation and soil, which was piled to the outside of each tire track. Total plant cover (all species) was not affected by track curvature in low-velocity spirals, but decreased in the order straight tracking > moderate turns > sharp turns in high-velocity spirals. In low-velocity spirals, post-tracking cover of several plant growth forms (non-native species, perennial species, sod-forming grasses) was similar to pre-tracking cover, but in high-velocity spirals, post-tracking cover of these growth forms decreased in the order straight >= moderate = sharp. Cover of native species and forbs decreased more in high- than in low-velocity spirals, but was unaffected by curvature. Pre- and post-tracking cover of annual species, bunchgrasses, and shrubs was <= 3%. The most severe vegetation damage caused by operation of wheeled LAVs on grasslands is associated with sharp, high-velocity turns. (c) 2006 Elsevier Ltd. All rights reserved.
机译：军事训练用地的可持续利用需要了解和预测军用车辆对植被的影响。我们研究了8轮轻型装甲车（LAV）对华盛顿路易斯堡（Fort Lewis）草地植被的最初影响。 LAV以两个起始速度10.3和5.1 ms（-1）驱动复制螺旋路径。扰动宽度（受轮胎影响的地面宽度）随着转弯半径的减小而增加，但不受车速的影响。一个反指数模型预测了两个速度在所有转弯半径处的扰动宽度（r（2）= 0.68）。在低速螺旋中，对于高速螺旋中的直线跟踪（转弯半径> 40 in）和中等转弯（半径20-40 m），所有植被破坏都被留下了烙印（植物被轮子弄平）。在急转弯（半径<20 m），高速转弯时，大部分或全部受干扰的宽度被刮去，没有表层植被和土壤，它们被堆放在每个轮胎轨道的外侧。在低速螺旋中，总的植物覆盖率（所有物种）不受轨迹曲率的影响，但在高速螺旋中，其顺序依次为：直线跟踪>中度转弯>急转弯。在低速螺旋中，几种植物生长形式（非本地物种，多年生物种，草皮形成的草）的追踪后覆盖与追踪前的覆盖相似，但在高速螺旋中，这些植物的追踪覆盖生长形式按> =中度=急剧的顺序下降。高速旋涡比低速旋涡覆盖的原生物种和前肢覆盖更多，但不受曲率的影响。年度物种，束草和灌木的追踪前和追踪后覆盖率<= 3％。轮式LAV在草原上作业所造成的最严重的植被破坏与急转弯，高速转弯有关。 （c）2006 Elsevier Ltd.保留所有权利。

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