Effects of acidic deposition and soil acidification on sugar maple trees in the Adirondack Mountains, New York.
Effects of acidic deposition and soil acidification on sugar maple trees in the Adirondack Mountains, New York.
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DOI：
10.1021/es401864w
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发表时间：
2013-11
影响因子：
11.4
通讯作者：
Timothy J. Sullivan;G. Lawrence;Scott W. Bailey;T. McDonnell;Colin M. Beier;K. Weathers;G. McPherson;Daniel A. Bishop
中科院分区：
文献类型：
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作者：
Timothy J. Sullivan;G. Lawrence;Scott W. Bailey;T. McDonnell;Colin M. Beier;K. Weathers;G. McPherson;Daniel A. Bishop
我们记录了酸性大气沉降和土壤酸化对冠层健康的影响，断面积增量，并在美国东北部的纽约州的阿迪朗达克地区的糖枫树（SM）的树木再生，在那里SM是丰富的，但没有得到很好的研究和广泛的土壤钙（Ca）的耗尽已被记录。糖枫是阿迪朗达克山生态区冠层的优势树种，对钙的需求量很高。在这一地区的树木生长在土壤中的酸碱化学（低交换性钙和%碱饱和度[BS]），收到相对较高的大气硫和氮沉降水平差表现出几乎没有SM幼苗再生和较低的树冠活力相比，研究地块相对较高的交换性钙和BS和较低水平的酸性沉降。在20世纪的平均断面积增量与Oa、A和上部B土层的酸碱化学相关（p < 0.1）。缺乏阿迪朗达克SM再生，减少冠层条件，并可能减少断面积的增长，在最近几十年来与低浓度的营养盐基阳离子在这一地区已经经历了土壤钙耗尽酸性沉积。
We documented the effects of acidic atmospheric deposition and soil acidification on the canopy health, basal area increment, and regeneration of sugar maple (SM) trees across the Adirondack region of New York State, in the northeastern United States, where SM are plentiful but not well studied and where widespread depletion of soil calcium (Ca) has been documented. Sugar maple is a dominant canopy species in the Adirondack Mountain ecoregion, and it has a high demand for Ca. Trees in this region growing on soils with poor acid-base chemistry (low exchangeable Ca and % base saturation [BS]) that receive relatively high levels of atmospheric sulfur and nitrogen deposition exhibited a near absence of SM seedling regeneration and lower crown vigor compared with study plots with relatively high exchangeable Ca and BS and lower levels of acidic deposition. Basal area increment averaged over the 20th century was correlated (p < 0.1) with acid-base chemistry of the Oa, A, and upper B soil horizons. A lack of Adirondack SM regeneration, reduced canopy condition, and possibly decreased basal area growth over recent decades are associated with low concentrations of nutrient base cations in this region that has undergone soil Ca depletion from acidic deposition.