Rates and pathways of carbon turnover at the abyssal seafloor: a long-term, in situ experimental study.

深海海底碳周转率和途径：一项长期原位实验研究。

• 批准号: NE/E006426/1
• 负责人: Ursula Witte
• 金额: $ 50.84万
• 依托单位: University of Aberdeen
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2007
• 资助国家: 英国
• 起止时间: 2007 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=NE%2FE006426%2F1
• 关键词: Rates; pathways; carbon; turnover; abyssal

Organisms at the deep-sea floor rely on particles sinking from the sea surface for food, which is correspondingly scarce and unpredictable - sometimes half of the annual food supply arrives within a few days. However, despite the enormous extent of this ecosystem (more than 50% of the Earth's surface is sea floor below 3,000 m of water), we know very little about how deep-sea organisms adapt and react to such a pulse. We therefore propose to investigate the fate of a food pulse at the abyssal sea floor in a series of short- and long-term manipulative experiments. With a remotely operated vehicle (ROV), we will sample natural particulate food at the deep-sea floor, label it with a tracer, add it to experimental chambers and plots, and follow its pathway through the community on time scales from days to months. We will focus our study on bacteria because they are more abundant than any other group of organisms in the deep-sea, and on larger organisms living in the sediment because these, through their foraging activities, transport the food into the sediment where also deep-living bacteria can access it. The work will be carried out in collaboration with Prof K Smith at Monterey Bay Aquarium Research Institute (MBARI) during 5 process cruises on MBARI research vessel Western Flyer with the deep-sea ROV Tiburon on board.

深海海底的生物依靠从海面沉降的颗粒来获取食物，而这种食物相对稀缺且不可预测——有时一年的食物供应量的一半会在几天内到达。然而，尽管这个生态系统规模巨大（地球表面 50% 以上是水深 3,000 米以下的海底），但我们对深海生物如何适应这种脉冲并做出反应却知之甚少。因此，我们建议通过一系列短期和长期操纵实验来研究深海海底食物脉冲的命运。通过遥控潜水器 (ROV)，我们将在深海海底对天然颗粒食物进行采样，用示踪剂对其进行标记，将其添加到实验室和试验区，并在几天到几个月的时间尺度上跟踪其在社区中的路径。我们将把研究重点放在细菌上，因为它们比深海中任何其他生物群都丰富；我们将重点研究生活在沉积物中的大型生物，因为它们通过觅食活动将食物输送到沉积物中，深海细菌也可以在那里获取食物。这项工作将与蒙特利湾水族馆研究所 (MBARI) 的 K Smith 教授合作，在 MBARI 研究船 Western Flyer 上进行 5 次过程巡航，船上装有深海 ROV Tiburon。

项目成果

Response of the benthic foraminiferal community to a simulated short-term phytodetritus pulse in the abyssal North Pacific

• DOI: 10.3354/meps09298
• 发表时间: 2011-01-01
• 期刊: MARINE ECOLOGY PROGRESS SERIES
• 影响因子: 2.5
• 作者: Enge, Annekatrin J.;Nomaki, Hidetaka;Heinz, Petra
• 通讯作者: Heinz, Petra

Feeding preferences of abyssal macrofauna inferred from in situ pulse chase experiments.

从原位脉冲追逐实验推断出深海大型动物的摄食偏好。

• DOI: 10.1371/journal.pone.0080510
• 发表时间: 2013
• 期刊: PloS one
• 影响因子: 3.7
• 作者: Jeffreys RM