Morphological and taxonomic diversity of mesozooplankton is an important driver of carbon export fluxes in the ocean
Morphological and taxonomic diversity of mesozooplankton is an important driver of carbon export fluxes in the ocean
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DOI：
10.1111/1755-0998.13907
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发表时间：
2023-11
影响因子：
7.7
通讯作者：
Margaux Perhirin;Hannah Gossner;Jessica Godfrey;Rod Johnson;L. Blanco-Bercial;S. Ayata
中科院分区：
文献类型：
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作者：
Margaux Perhirin;Hannah Gossner;Jessica Godfrey;Rod Johnson;L. Blanco-Bercial;S. Ayata
中型浮游动物是一个非常多样化的小动物群体，大小从0.2到20毫米不等，不能逆着洋流游泳。它通过其在营养网络和生物碳泵中的作用，成为海洋生态系统的一个关键组成部分。传统上通过显微镜进行研究，但最近的方法已经发展到在个体尺度上快速获取大量数据（形态学，分子），使得使用基于特征的方法研究中型浮游动物成为可能。在这里，将定量成像与百慕大大西洋时间序列研究（BATS）站点的马尾藻海中获得的元条形码时间序列数据相结合，我们表明生物体的透明度可能是一个重要的特征，也需要考虑浮游动物对碳输出的影响，这与通常的假设相反，即大小是指导大多数浮游动物相关过程的主要特征。三个不同的社区被定义为分类组成的基础上，并成功地在整个研究期间，与社区之间的透明度不断变化的水平。从揭示六组分类群的元条形码数据建立共现网络。这些变化与生态系统功能和/或群落形态的变化有关。昼夜垂直迁移在BATS的重要性得到了证实，存在一组已知的类群是强大的移民。最后，我们评估了元编码是否可以提供一个定量的方法，生物量和/或丰度的某些类群。更多地了解中型浮游动物的多样性及其对生态系统功能的影响，将有助于在生物地球化学模型中更好地代表它们。
Mesozooplankton is a very diverse group of small animals ranging in size from 0.2 to 20 mm not able to swim against ocean currents. It is a key component of pelagic ecosystems through its roles in the trophic networks and the biological carbon pump. Traditionally studied through microscopes, recent methods have been however developed to rapidly acquire large amounts of data (morphological, molecular) at the individual scale, making it possible to study mesozooplankton using a trait‐based approach. Here, combining quantitative imaging with metabarcoding time‐series data obtained in the Sargasso Sea at the Bermuda Atlantic Time‐series Study (BATS) site, we showed that organisms' transparency might be an important trait to also consider regarding mesozooplankton impact on carbon export, contrary to the common assumption that just size is the master trait directing most mesozooplankton‐linked processes. Three distinct communities were defined based on taxonomic composition, and succeeded one another throughout the study period, with changing levels of transparency among the community. A co‐occurrences' network was built from metabarcoding data revealing six groups of taxa. These were related to changes in the functioning of the ecosystem and/or in the community's morphology. The importance of Diel Vertical Migration at BATS was confirmed by the existence of a group made of taxa known to be strong migrators. Finally, we assessed if metabarcoding can provide a quantitative approach to biomass and/or abundance of certain taxa. Knowing more about mesozooplankton diversity and its impact on ecosystem functioning would allow to better represent them in biogeochemical models.