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 Frost Little Rock Lake是1983年至1990年之间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年添加酸后，已经评估了湖泊回收的化学和生物学特征。湖的化学特征在很大程度上恢复了预鉴定的条件。到1995年春季，该湖的pH值接近6.1，这是在操纵之前的价值。相比之下，湖泊的某些生物学条件已被证明要少得多。特别是，治疗流域浮游动物社区的分类学组成与参考盆地中发生的社区的分类量大不相同。即使在酸化的最低pH阶段，在两个盆地中，在两个盆地中几乎保持平等的总浮游生物量也在恢复过程中也广泛波动。该奖项将为继续监视小石城的治疗和参考盆地提供资金。这将允许评估浮游动物的恢复是否只是较慢，即湖的化学反应，或者社区是否被驱逐到替代状态，这将持续很长时间。这些资金还将允许其他小规模实验评估影响浮游动力学的一些机制。大规模的实验（例如它）是应用和理论生态学之间的接口。该项目的持续资金将为酸化的特定影响以及控制生态系统结构和功能的一些基本过程提供重要的见解。