Recent evidence of biological recovery from acidification in the Adirondacks (New York, USA): a multiproxy paleolimmlogical investigation of Big Moose Lake
Recent evidence of biological recovery from acidification in the Adirondacks (New York, USA): a multiproxy paleolimmlogical investigation of Big Moose Lake
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DOI：
10.1139/f11-003
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发表时间：
2011-04-01
影响因子：
2.4
通讯作者：
Cumming, Brian F.
中科院分区：
文献类型：
--
作者：
Arseneau, Kristina M. A.;Driscoll, Charles T.;Cumming, Brian F.
这项调查提供了酸影响下阿迪朗达克（美国纽约）湖泊酸化后生物恢复的证据。自1982年以来，每月收集的水化学测量表明，大驼鹿湖正在经历酸沉积的化学恢复。为了评估可能的生物恢复，在沉积物岩心中分析了绿藻、硅藻和枝海的组合变化。本文解决了三个问题：(i) 1995年美国酸雨计划实施后，物种组成是否发生了重大变化？（ii） 1995年后物种组成的变化是否与酸化后的化学恢复一致，或者更确切地说，与其他变化的化学/气候因素一致？（iii）物种组合是否恢复到酸化前的状态？1995年后，低最适ph的硅藻和绿藻类群相对丰度下降，高最适ph类群相对丰度增加，表明生物从酸化中恢复。相比之下，枝总目对1995年后ph值的增加没有反应。没有一个物种组恢复到干扰前和干扰后的状态。某些分类群（如棘轮）的增加可能与阿迪朗达克地区最近的气候变暖有关。
This investigation provides evidence of biological recovery from acidification in an acid-impacted Adirondack (New York, USA) lake. Water chemistry measurements collected monthly since 1982 show that Big Moose Lake is undergoing chemical recovery from acid deposition. To assess possible biological recovery, changes in chrysophyte, diatom, and cladoceran assemblages are analyzed in a sediment core. Three questions are addressed: (i) is there a significant shift in species composition after the 1995 implementation of the US Acid Rain Program? (ii) Are post-1995 changes in species composition consistent with chemical recovery from acidification or, rather, other changing chemical/climatic factors? (iii) Are the species assemblages returning to their pre-acidification state? Post-1995 declines in the relative abundance of diatom and chrysophyte taxa with low pH-optima and increases in taxa with higher pH-optima indicate biological recovery from acidification. In contrast, the cladocera remain unresponsive to post-1995 increases in pH. No species group has returned to its pre-disturbance state and post-ca. 1995 increases in certain taxa (e.g., Synura echinulata) may be related to recent climate warming in the Adirondacks.