When Did Acid-Sensitive Adirondack Lakes (New York, USA) Begin to Acidify and Are They Still Acidifying?
When Did Acid-Sensitive Adirondack Lakes (New York, USA) Begin to Acidify and Are They Still Acidifying?
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对酸敏感的阿迪朗达克湖（美国纽约）何时开始酸化以及它们仍在酸化吗？
DOI：
10.1139/f94-154
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发表时间：
1994
影响因子：
2.4
通讯作者：
H. Birks
中科院分区：
文献类型：
--
作者：
B. Cumming;K. A. Davey;J. Smol;H. Birks
根据210Pb测年沉积物柱样中鳞片状金藻（绿藻纲，合脉藻纲）的物种组成，采用传递函数法对20个低碱度阿迪朗达克公园湖泊的pH值进行了重建。大约80%的湖泊自前工业时代以来酸化。四类湖泊响应酸性沉积被确定：（一）湖泊，显示很少或没有证据表明，自工业化前时代的酸化，（二）湖泊与工业化前的pH值在5和6之间，开始酸化约。1900年，（三）“自然”酸性湖泊，酸化甚至进一步约。1900年，和（iv）湖泊与工业化前的pH值约6，酸化约。1930-50.酸化的湖泊。1900年的湖泊一般较小，海拔较高，工业化前的pH值低于I类或IV类湖泊。这些模式与近期湖泊酸化的酸性沉积假说相一致。我们的研究结果表明，“临界”硫酸盐沉积负荷的广告…
A transfer function was used to reconstruct pH values of 20 low-alkalinity Adirondack Park lakes based on the species composition of scaled chrysophytes (Chrysophyceae, Synurophyceae) in stratigraphie intervals from 210Pb-dated sediment cores. Approximately 80% of the lakes acidified since preindustrial times. Four categories of lake response to acidic deposition were identified: (i) lakes that showed little or no evidence of acidification since preindustrial times, (ii) lakes with preindustrial pH values between 5 and 6 that began to acidify ca. 1900, (iii) "naturally" acidic lakes that acidified even further ca. 1900, and (iv) lakes with preindustrial pH values around 6 that acidified ca. 1930–50. Lakes that acidified ca. 1900 were generally smaller, higher elevation lakes with lower preindustrial pH values than lakes in category i or iv. These patterns are consistent with the acidic deposition hypothesis of recent lake acidification. Our results indicated that "critical" sulfate deposition loads for Ad...