Microbial dietary preference and interactions affect the export of lipids to the deep ocean

IF 44.7 1区综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES Science Pub Date : 2024-09-13 DOI:10.1126/science.aab2661

Lars Behrendt, Uria Alcolombri, Jonathan E. Hunter, Steven Smriga, Tracy Mincer, Daniel P. Lowenstein, Yutaka Yawata, François J. Peaudecerf, Vicente I. Fernandez, Helen F. Fredricks, Henrik Almblad, Joe J. Harrison, Roman Stocker, Benjamin A. S. Van Mooy

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Abstract

Lipids comprise a significant fraction of sinking organic matter in the ocean and play a crucial role in the carbon cycle. Despite this, our understanding of the processes that control lipid degradation is limited. We combined nanolipidomics and imaging to study the bacterial degradation of diverse algal lipid droplets and found that bacteria isolated from marine particles exhibited distinct dietary preferences, ranging from selective to promiscuous degraders. Dietary preference was associated with a distinct set of lipid degradation genes rather than with taxonomic origin. Using synthetic communities composed of isolates with distinct dietary preferences, we showed that lipid degradation is modulated by microbial interactions. A particle export model incorporating these dynamics indicates that metabolic specialization and community dynamics may influence lipid transport efficiency in the ocean’s mesopelagic zone.

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微生物的饮食偏好和相互作用影响向深海输出脂质

脂质占海洋中沉降有机物的很大一部分，在碳循环中起着至关重要的作用。尽管如此，我们对控制脂质降解过程的了解仍然有限。我们结合纳米脂质组学和成像技术研究了细菌降解各种藻类脂滴的过程，发现从海洋颗粒中分离出来的细菌表现出不同的饮食偏好，从选择性降解到杂乱降解不等。饮食偏好与一组不同的脂质降解基因有关，而不是与分类起源有关。利用由具有不同饮食偏好的分离物组成的合成群落，我们发现脂质降解受微生物相互作用的调节。一个包含这些动态变化的微粒输出模型表明，代谢特化和群落动态可能会影响海洋中上层区的脂质运输效率。

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Science 综合性期刊-综合性期刊

CiteScore

61.10

自引率

0.90%

发文量

审稿时长

2.1 months

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