LTREB: Continuing Assessment of Ecological Recovery Following Experimental Acidification of Little Rock Lake, Wisconsin

LTREB：威斯康星州小石湖实验酸化后生态恢复的持续评估

• 批准号: 9527669
• 负责人: Timothy Kratz
• 金额: $ 9万
• 依托单位: University of Wisconsin-Madison
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-02-01 至 1999-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9527669&HistoricalAwards=false
• 关键词: LTREB; Continuing; Assessment; Ecological; Recovery

9527669 Frost Little Rock Lake was the site of a whole-ecosystem acidification experiment between 1983 and 1990. A wide range of acid responses were documented by comparing the lake's treatment and reference basins. Since 1990 when acid additions stopped, chemical and biological characteristics of the lake's recovery have been evaluated. Chemical features of the lake have largely returned to pre-acidified conditions. By spring 1995, the lake's pH was close to 6.1, the value prior to the manipulation. In contrast, some biological conditions of the lake have proven much less resilient. In particular, the taxonomic composition of the treatment basin's zooplankton community has remained substantially different from the community occurring in the reference basin. Even total zooplankton biomass, which remained nearly equal in the two basins in all but the lowest pH stage of the acidification, has fluctuated widely during recovery. This award will provide funds to continue monitoring the treatment and reference basins of Little Rock Lake. This will allow assessment of whether the zooplankton recovery is simply slower that the lake's chemistry or if the community has been driven to an alternate state which will persist for an extended period of time. The funds will also allow additional small-scale experiments to evaluate some of the mechanisms affecting zooplankton dynamics. Large-scale experiments such as this serve as an interface between applied and theoretical ecology. Continued funding of this project will provide important insights into the specific effects of acidification and into some of the fundamental processes that control ecosystem structure and function.

9527669弗罗斯特小石城湖是1983年至1990年之间的一个全生态系统酸化实验的地点。通过比较湖泊的处理和参考盆地，记录了广泛的酸反应。自1990年停止加酸以来，对湖泊恢复的化学和生物特征进行了评价。湖泊的化学特征已基本恢复到酸化前的状态。到1995年春天，湖水的pH值接近6.1，这是操作前的值。相比之下，湖泊的一些生物条件已被证明缺乏弹性。特别是，处理盆地的浮游动物群落的分类组成仍然与参考盆地中的群落有很大的不同。即使是总浮游动物生物量，保持几乎相等的两个盆地中的所有，但最低的pH值阶段的酸化，在恢复期间波动很大。该奖项将提供资金，继续监测小石城湖的处理和参考流域。这将允许评估浮游动物的恢复是否只是比湖泊的化学物质慢，或者群落是否已被驱动到一个将持续很长一段时间的交替状态。这些资金还将允许进行更多的小规模实验，以评估影响浮游动物动态的一些机制。像这样的大规模实验是应用生态学和理论生态学之间的接口。继续为这一项目提供资金将有助于深入了解酸化的具体影响以及控制生态系统结构和功能的一些基本过程。