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Investigating the ecology and biogeochemistry of the twilight zone, one of the least studied ecosystems on Earth

研究暮光区的生态学和生物地球化学，这是地球上研究最少的生态系统之一

基本信息

批准号：
2570153
负责人：
金额：
--
依托单位：
University of Southampton
依托单位国家：
英国
项目类别：
Studentship
财政年份：
2021
资助国家：
英国
起止时间：
2021 至无数据
项目状态：
未结题

来源：
https://gtr.ukri.org/projects?ref=studentship-2570153
关键词：
Investigating ecology biogeochemistry twilight zone

项目摘要

The mesopelagic zone of the ocean (~50-1000 m beneath the surface), often referred to as the 'twilight zone', remains one of the most poorly understood ecosystems on Earth. It hosts a diverse community of animals; some of these are presumed to feed on sinking particles of detritus, whereas others are thought to migrate into surface waters to feed on phytoplankton. These trophic interactions influence the storage of carbon in the ocean's interior, and hence contribute to global climate regulation. However, the current paucity of information on the ecology and physiology of mesopelagic zooplankton hinders our ability to represent their activities in global biogeochemical models, including those used by the IPCC to assess future climate. This project will investigate how the distribution and activities of mesopelagic zooplankton influence the fate of sinking organic matter. Changes in the trophic ecology and physiology of zooplankton with increasing depth will be examined using a combination of laboratory analyses and size-spectrum theory. Increased understanding of who is eating what in the mesopelagic food web will be used to examine the potential routes through which energy and organic matter cycle within this important ecosystem. This will help improve the representation of zooplankton in biogeochemical models.

海洋的中层带（海平面以下50-1000米），通常被称为“黄昏地带”，仍然是地球上最不了解的生态系统之一。这里有各种各样的动物群落；据推测，其中一些以下沉的碎屑颗粒为食，而另一些则被认为迁移到地表水中以浮游植物为食。这些营养相互作用影响着海洋内部的碳储存，因此有助于全球气候调节。然而，目前关于中上层浮游动物的生态学和生理学信息的缺乏阻碍了我们在全球生物地球化学模型中表示它们活动的能力，包括IPCC用来评估未来气候的那些模型。该项目将研究中远洋浮游动物的分布和活动如何影响下沉有机物的命运。随着深度的增加，浮游动物的营养生态学和生理学的变化将使用实验室分析和尺寸谱理论相结合的方法进行研究。增加对中上层食物网中谁吃什么的了解将用于检查能量和有机物质在这个重要生态系统中循环的潜在途径。这将有助于提高生物地球化学模型中浮游动物的代表性。