Cascade Project at North Temperate Lakes LTER: Aquatic heatwave effects on chlorophyll 2008-2019

Temperature and chlorophyll data were collated from multiple datasets to identify the effects of aquatic heatwaves on phytoplankton in three north temperate lakes, Peter Lake, Paul Lake, and Tuesday Lake between 2008 and 2019. Heatwaves were identified using a water temperature model constructed from temperature data from Sparkling Lake and Woodruff Airport between 1989 and 2022. Heatwave characteristics, water color, nutrients, grazing, and lake stability data are included to relate chlorophyll response to heatwaves to other conditions associated with a set of whole-lake experiments. The food web of Peter Lake was manipulated with largemouth bass additions between 2008 and 2011. Nutrient additions were made to Peter Lake and Tuesday Lake between 2013 and 2015, and again in Peter Lake in 2019. Paul Lake was always maintained as an unmanipulated reference lake. Full descriptions of the experiments can be found in Szydlowski et al., "Aquatic heatwaves increase surface chlorophyll concentrations in experimental and reference lakes."

本研究整合多套数据集的水温与叶绿素数据，旨在探明2008至2019年间，北温带三座湖泊——彼得湖（Peter Lake）、保罗湖（Paul Lake）与星期二湖（Tuesday Lake）内水生热浪对浮游植物的影响。热浪的识别依托一套基于1989至2022年闪光湖（Sparkling Lake）与伍德拉夫机场水温数据构建的水温模型完成。本数据集同时涵盖热浪特征参数、水体色度、营养盐浓度、牧食作用强度及湖泊稳定性数据，用于将叶绿素对热浪的响应与一系列全湖操控实验关联的其他环境条件建立关联。2008至2011年，研究人员通过投放大口黑鲈对彼得湖的食物网实施了操控。2013至2015年，研究人员分别向彼得湖与星期二湖施加营养盐，并于2019年再次对彼得湖开展营养盐添加实验。保罗湖始终作为未受人为操控的参照湖泊保持自然状态。有关各实验的完整细节可参见Szydlowski等人发表的《水生热浪提升实验及参照湖泊表层叶绿素浓度》（"Aquatic heatwaves increase surface chlorophyll concentrations in experimental and reference lakes."）一文。