Collaborative Research: MRA: On thin ice- implications of shorter winters for the future of freshwater phytoplankton phenology and function

合作研究：MRA：薄冰——较短冬季对淡水浮游植物物候和功能未来的影响

• 批准号: 2306895
• 负责人: Isabella Oleksy
• 金额: $ 47.68万
• 依托单位: University of Colorado at Boulder
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2023
• 资助国家: 美国
• 起止时间: 2023-10-01 至 2028-09-30
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2306895&HistoricalAwards=false
• 关键词: Collaborative; Research; MRA; thin; ice

Lakes around the world face rapidly warming temperatures coupled with shorter winters. These have an impact on surface ice formation and coverage in winter and can impact growth of lake algae and their interactions with other aquatic organisms. Increased algal blooms threaten water quality, drinking water supply, and recreation, as well as energy flow through food webs. In this project, researchers will mimic climate-induced changing lake futures by studying U.S. lakes from north to south, and ranging from ice covered to ice free in winter months. Their research will examine algal growth and interactions on a year-round scale using field observations, experiments and high-frequency environmental sensors, and will employ predictive modeling to assess how changes in climate will affect lake ecosystem structure and function. Broader Impacts will be achieved through the vehicles of community science, training of undergraduate and graduate researchers, and public engagement. Workforce development initiatives will provide training for water treatment plant operators at drinking water reservoirs and high school students. By engaging youth and community scientists, these partners/participants will be trained to actively serve as stewards of water quality in their respective communities, empowering them to be knowledgeable and engaged in research related to climate impacts on lake ecosystems. To study the transition from ice covered to ice free winters, the overall objective of this project is to assess how changing ice cover impacts algae. There is an explicit need to understand how changing winter conditions influence algae, including seasonal succession, competitive outcomes, and the strength of the ecological response to prior ecosystem conditions (ecological memory). Studies on non-summer algal assemblages are rare. Connecting under-ice and ice-free periods is essential for understanding the impact of changing winter ice patterns on lake ecosystem dynamics. This objective will be accomplished via three specific aims: 1. Elucidate how varying winter conditions across a wide range of lakes affect algal communities (including blooms and cyanotoxins) during the winter relative to summer. 2. Determine how the ecological memory of preceding conditions affects current algal community structure and function. 3. Differentiate how ice cover, underwater light, and algae will respond as climate change scenarios shift from ice covered lakes towards a future with no surface ice formation.The working hypothesis is that the gradual loss of winter ice and snow cover will dramatically shape lake physical characteristics, which sets the template for algal species interactions and competitive outcomes. As a lake’s thermal regime shifts, there will be major changes to algal community interactions and competition, which will alter succession and bloom patterns. This work addresses foundational ecological questions related to community diversity and assembly, placed in the context of rapidly changing winter conditions. Research lakes include those within the National Ecological Observatory Network (NEON). This project will contribute to the education and training of the future scientific and technical workforce needed to pursue basic research on regional to continental scale biology, and will engage a diverse community of learners, educators and managers in regional to continental scale research and the use of NEON.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

世界各地的湖泊面临迅速变暖的温度以及较短的冬季。这些对冬季的表面冰形成和覆盖范围有影响，并可能影响藻类湖的生长及其与其他水生生物的相互作用。增加藻类血液威胁着水质，饮用水供应和娱乐活动，以及通过食物网的能量流动。在这个项目中，研究人员将通过研究美国北部到南的湖泊，并在冬季从冰上到无冰，从而模仿攀登诱发的湖泊期货。他们的研究将使用现场观测，实验和高频环境传感器检查全年量表的藻类生长和相互作用，并将采用预测性建模来评估气候变化将如何影响湖泊生态系统的结构和功能。通过社区科学，本科和研究生研究人员的培训以及公众参与的工具将实现更广泛的影响。劳动力开发计划将为饮用水水库和高中生的水处理厂运营商提供培训。通过吸引青年和社区科学家，这些合作伙伴/参与者将接受培训，以积极地充当各自社区的水质管家，使他们成为知识渊博的知识，并从事与气候对湖泊生态系统的影响有关的研究。为了研究从覆盖冰到没有冰冬季的过渡，该项目的总体目标是评估冰覆盖的变化如何影响藻类。明确需要了解变化的冬季状况如何影响藻类，包括季节性成功，竞争结果以及对先前生态系统条件（生态记忆）的生态反应的强度。关于非夏季藻类组合的研究很少。连接冰底冰和无冰时期对于理解改变冬季冰模式对湖泊生态系统动态的影响至关重要。该目标将通过三个特定目标来实现：1。阐明在冬季相对于夏季，各种湖泊的冬季状况如何影响藻类社区（包括血液和氰毒素）。 2.确定前面条件的生态记忆如何影响当前的藻类社区结构和功能。 3。区分冰覆盖，水下光和藻类将如何反应，因为气候变化的情况从冰覆盖的湖泊转变为没有表面冰层的未来。工作假设是，冬季冰和雪覆盖的等级损失将大大降低湖泊物理特征，从而为藻类物种相互作用和有竞争力的结果设定了模板。随着湖泊的热力制度的变化，藻类社区互动和竞争将会发生重大变化，这将改变成功和开花模式。这项工作解决了与社区多样性和集会有关的基本生态问题，并置于冬季迅速变化的背景下。研究湖泊包括国家生态天文台（NEON）中的湖泊。该项目将有助于对未来的科学和技术劳动力的教育和培训，以追求有关区域至持续规模生物学的基础研究，并将吸引一个多样性的学习者，教育工作者和管理人员的多样性社区，以连续规模研究和NEON使用NEON。该奖项反映了NSF的法定任务，并通过评估了基金会的范围来诚实地支持基金会的支持。