Collaborative Research: BoCP-Implementation: The influence of different nutrient delivery modes on functional biodiversity of marine plankton in a changing ocean

合作研究：BoCP-实施：不同养分输送模式对变化海洋中海洋浮游生物功能生物多样性的影响

• 批准号: 2326029
• 负责人: Diego Figueroa
• 金额: $ 37.14万
• 依托单位: The University of Texas Rio Grande Valley
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2023
• 资助国家: 美国
• 起止时间: 2023-10-01 至 2027-09-30
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2326029&HistoricalAwards=false
• 关键词: Collaborative; Research; BoCP; Implementation; influence

All living organisms must acquire nutrients from their environment to survive and grow. Phytoplankton and their zooplankton grazers in the ocean, which constitute the base levels of the planet’s largest food webs and play an essential role in global carbon cycling, are no exception. However, the rules governing how different physical mechanisms of nutrient delivery to marine ecosystems structure plankton biodiversity and interaction networks along with their trophic dependencies are poorly understood. This project examines how these specific physical mechanisms influence the functional biodiversity of plankton communities through increasing nutrient inputs into the mixed layer, leading to strong, yet perhaps predictable biological variability in a changing ocean environment. This research reveals details on how environmental disturbances of varying spatial and temporal scales affect ecosystem function and elucidates the dynamics between taxonomic biodiversity and functional diversity with respect to ecosystem stability. Insights gained from this program about controls on productivity and biodiversity are applicable to many island and upwelling systems globally. Engagement of local partners to collect additional observations and dissemination of research findings to the Galápagos community enable a two-way dialog about system function and the issues faced by the indigenous community due to climate change. The project also provides training for graduate students and undergraduates from underrepresented groups and a K-12 teacher.This project combines field and laboratory studies with a modeling effort to evaluate if different physical modes of nutrient delivery, in close proximity to each other, exert sufficient controls on nutrient availability that influences plankton functional diversity and associated dynamics. The study site is the Galápagos archipelago in the eastern equatorial Pacific Ocean where intensive shipboard sampling is augmented by 12-month deployments of a vertical profiler mooring to observe i) an isolated island wake and ii) interaction of the archipelago with the Equatorial Undercurrent (EUC) and upwelling on the western side of the archipelago. Internal tides, believed to have a significant influence on the system, are also being observed. Varying functional traits of plankton such as nutrient acquisition strategies and storage are being measured to investigate whether they are selected upon by these inputs. The cruise and longer-term observational efforts generate a spatial survey and time series of physical, chemical and biological properties. Laboratory culture studies using phytoplankton isolates obtained from the region are used to quantify phytoplankton functional traits in relation to nutrient acquisition and storage. The results inform parameterization of a plankton NPZ model forced by time series of nutrient delivery representative of the three physical modes at play, used to test if bottom-up control can explain observed distributions and temporal variability. This research advances ecological theory on biodiversity dynamics and functional biodiversity by testing the hypothesis that functional redundancy drives ecosystem stability, achieved through resistance to change or resiliency.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.

所有生物体都必须从其环境中获取营养才能生存和生长。浮游植物及其在海洋中的浮游动物放牧者构成了地球最大的食物网的基本水平，在全球碳循环中起着至关重要的作用，这也不例外。然而，规定的规则如何将营养物质在海洋生态系统中的不同物理机制结构结构浮游生物多样性和相互作用网络及其营养依赖性，这些项目检查如何影响浮游生物群落的功能性生物多样性，从而通过增加混合层的养分投入到强大而可预测的生物学上，从而变化，从而变化，从而变化了可变性。这项研究揭示了有关各种空间和临时量表的环境困扰如何影响生态系统功能，并阐明了分类生物多样性与功能多样性之间的动态，相对于生态系统稳定性。从该计划中获得的有关生产力和生物多样性的控制的见解适用于许多岛屿和上升流的系统。当地合作伙伴参与收集其他观察结果并将研究发现传播给加拉帕戈斯社区，这使得有关系统功能的双向对话以及由于气候变化而导致的土著社区所面临的问题。该项目还为研究生和代表性不足的小组和K-12老师的本科生提供培训。本项目将现场和实验室研究与建模努力相结合，以评估不同的养分交付方式是否彼此近距离近端，对植物的营养可用性有足够的控制，从而影响了浮游生气的功能多样性和相关的动力。该研究站点是东部等效太平洋的加拉帕戈斯群岛，在该临时船上进行了12个月的部署，将垂直剖面套装的12个月部署增强，以观察i）孤立的岛屿唤醒和ii）群岛的相互作用。还观察到内部潮汐对系统具有重大影响。正在测量浮游生物的各种功能性状，例如养分获取策略和存储，以调查是否选择它们。通过这些输入。巡航和长期观察工作产生了物理，化学和生物学特性的空间调查以及时间序列。使用从该地区获得的浮游植物分离株的实验室培养研究用于量化浮游植物功能性状与养分获取和储存有关。该结果为浮游生物NPZ模型的参数化提供了参数化，该模型由时间序列的营养输送代表发挥作用的三种物理模式，用于测试自下而上的控制是否可以解释观察到的分布和临时变异性。这项研究通过测试以下假设，即功能冗余驱动生态系统稳定性，通过抵制变化或弹性来实现生态系统稳定性，从而提高了关于生物多样性动力学和功能生物多样性的生态理论。该奖项反映了NSF的法定任务，并通过评估该基金会的知识功能和广泛的影响来审查NSF的法定任务，并被认为是珍贵的支持。