Collaborative Research: Impacts of Elevated pCO2 on a Dominant Aragonitic Pteropod (Thecosomata) and its Specialist Predator (Gymnosomata) in the Ross Sea

合作研究：pCO2 升高对罗斯海主要文石翼足类动物 (Thecosomata) 及其专业捕食者 (Gymnosomata) 的影响

• 批准号: 0538479
• 负责人: Brad Seibel
• 金额: $ 16.73万
• 依托单位: University of Rhode Island
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2006
• 资助国家: 美国
• 起止时间: 2006-09-01 至 2010-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0538479&HistoricalAwards=false
• 关键词: Collaborative; Research; Impacts; Elevated; pCO2

Rising atmospheric carbon dioxide concentrations have resulted in greater oceanic uptake of anthropogenic carbon dioxide. Elevated partial pressure of carbon dioxide can impact marine organisms both via decreased carbonate saturation that affects calcification rates and via disturbance to acid-base (metabolic) physiology. Pteropod molluscs (Thecosomata) form shells made of aragonite, a type of calcium carbonate that is highly soluble, suggesting that these organisms may be particularly sensitive to increasing carbon dioxide and reduced carbonate ion concentration. Thecosome pteropods, which dominate the calcium carbonate export south of the Antarctic Polar Front, will be the first major group of marine calcifying organisms to experience carbonate undersaturation within parts of their present-day geographical ranges as a result of anthropogenic carbon dioxide. An unusual, co-evolved relationship between thecosomes and their specialized gymnosome predators provides a unique backdrop against which to assess the physiological and ecological importance of elevated partial pressure of carbon dioxide. Pteropods are functionally important components of the Antarctic ecosystem with potential to influence phytoplankton stocks, carbon export, and dimethyl sulfide levels that, in turn, influence global climate through ocean-atmosphere feedback loops. The research will quantify the impact of elevated carbon dioxide on a dominant aragonitic pteropod, Limacina helicina, and its specialist predator, the gymnosome Clione antarctica, in the Ross Sea through laboratory experimentation. Results will be disseminated broadly to enhance scientific understanding in this field. The project involves collaboration between researchers at a predominantly undergraduate institution with a significant enrollment of students that are typically underrepresented in the research environment (California State University San Marcos - CSUSM) and at a Ph.D.-granting institution (University of Rhode Island - URI). The program will promote education and learning through the joint education of undergraduate students and graduate students at CSUSM and URI as part of a research team, as well as through the teaching activities of the principal investigators. Dr. Keating, CSUSM professor of science education, will participate in the McMurdo fieldwork and lead the outreach opportunities for the project.

大气二氧化碳浓度的上升导致人为二氧化碳的海洋吸收更大。二氧化碳的部分压力升高会通过降低碳酸盐饱和度影响海洋生物，从而影响钙化速率和对酸碱（代谢）生理学的干扰。翼龙软体动物（thecosomata）形成了由库酸盐制成的壳，这是一种高度溶于的碳酸钙，这表明这些生物可能对增加二氧化碳和降低碳酸盐离子浓度特别敏感。 thecosom翼足主导着南极极性阵线以南的碳酸钙出口，将是首个海洋钙化生物体的主要组，由于人为碳二氧化物而导致其当今地理位置范围内的部分碳酸盐不饱和。塞体及其专门的体操体捕食者之间不寻常的共同发展的关系提供了一种独特的背景，以评估二氧化碳部分压力升高的生理和生态重要性。翼足是南极生态系统功能上重要的组成部分，其潜力可能影响浮游植物库存，碳输出和二甲基硫化物水平，而二甲基硫化物水平又通过大气反馈回路影响全球气候。 该研究将通过实验室实验量化二氧化碳升高对主要的翼龙Helicina对主要的载足动物，Limacina Helicina及其专业捕食者Clione Antarctica的影响，通过实验室实验。结果将被广泛传播，以增强该领域的科学理解。该项目涉及主要是本科机构的研究人员之间的合作，而研究环境（加利福尼亚州立大学圣马科斯-CSUSM）和博士学位授予机构（罗德岛大学 - URI岛 - URI）的大量学生（通常在研究环境中代表不足的学生）。该计划将通过研究团队的一部分以及首席研究人员的教学活动，通过本科生和CSUSM和URI的研究生的共同教育来促进教育和学习。 CSUSM科学教育教授Keating博士将参加McMurdo实地考察，并为该项目提供推广机会。