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首页> 外文期刊>Ecological indicators >Long-term changes of ecosystem services at Soiling, Germany: Recovery from acidification, but increasing nitrogen saturation?
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Long-term changes of ecosystem services at Soiling, Germany: Recovery from acidification, but increasing nitrogen saturation?

机译：德国土壤污染的生态系统服务的长期变化：从酸化中恢复，但是氮饱和度增加了吗？

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摘要

Time series of values of ingenious parameters indicating ecosystem services from European beech and Norway spruce ecosystems at Soiling, Germany, were evaluated with respect to resilient or adaptive behaviour. Studied indicators comprise the use of monitoring data with up to more than 40 years of observation on deposition of potential acidity, sulphate (SO42-) budgets, exchangeable base cation pools, Bc/Al ratio in soil solution, nitrogen (N) budgets, foliar nutrition as indicated by the foliar Bc/N ratio, and defoliation. Deposition of potential acidity decreased considerably at both ecosystems. SO42- budgets reveal retention of sulphur in the soils affecting acid/base budgets. Exchangeable base cation pools decreased at both ecosystems by about 60%. Bc/Al ratio in soil solution in the mineral soil was mostly below critical limits indicating potential toxic stress to tree roots. N retention in the soils decreased from about 40 kg ha(-1) yr(-1) in the 1970s to currently very low rates of 0-20 kg ha(-1) yr(-1) indicating increasing N saturation. Foliar Bc/N ratio decreased at the spruce ecosystem indicating possible nutrient imbalances. Defoliation at both Soiling ecosystems is on a high level compared to other forests in Germany, but reveals no distinct relation to soil acidification or N saturation. From the selected indicators, SO42- and N budgets reveal resilient behaviour, whereas indicators related to the acid/base status tend to adaptive behaviour. (C) 2015 Elsevier Ltd. All rights reserved.
机译：就弹性或适应性行为，评估了灵巧参数值的时间序列，这些参数指示了来自德国山土的欧洲山毛榉和挪威云杉生态系统的生态系统服务。研究的指标包括使用监测数据，对潜在酸度，硫酸盐（SO42-）预算，可交换的碱性阳离子池，土壤溶液中的Bc / Al比，氮（N）预算，叶面的沉积进行长达40多年的观察叶面Bc / N比值和叶面脱落表明营养。在两个生态系统中，潜在酸度的沉积均大大降低。 SO42-预算显示土壤中硫的保留会影响酸/碱预算。在两个生态系统中，可交换的碱性阳离子池减少了约60％。矿质土壤中土壤溶液中的Bc / Al比大多低于临界限值，表明对树根的潜在毒性胁迫。土壤中的氮保留量从1970年代的40 kg ha（-1）yr（-1）降低到目前非常低的0-20 kg ha（-1）yr（-1），表明氮饱和度增加。云杉生态系统的叶面Bc / N比值降低，表明可能存在养分失衡。与德国其他森林相比，两个土壤生态系统的落叶均处于较高水平，但与土壤酸化或氮饱和度没有明显关系。从所选指标中，SO42和N预算显示出弹性的行为，而与酸/碱状态相关的指标则倾向于适应性行为。 （C）2015 Elsevier Ltd.保留所有权利。

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