Metabolic Architecture of the Deep Ocean Microbiome

Silvia G. Acinas, et al.

Aug 27, 2019

Received Date: 5th August 19

Silvia G. Acinas, Pablo Sánchez, Guillem Salazar, Francisco M. Cornejo-Castillo, Marta Sebastián, Ramiro Logares, Marta Royo-Llonch, Lucas Paoli, Shinichi Sunagawa, Pascal Hingamp, Hiroyuki Ogata, Gipsi Lima-Mendez, Simon Roux, José M. González, Jesús M. Arrieta, Intikhab S. Alam, Allan Kamau, Chris Bowler, Jeroen Raes, Stéphane Pesant, Peer Bork, Susana Agustí, Takashi Gojobori, Vladimir B. Bajic, Dolors Vaqué, Matthew B. Sullivan, Carlos Pedrós-Alió, Ramon Massana, Carlos M. Duarte, Josep M. Gasol

The deep sea, the largest compartment of the ocean, drives planetary-scale biogeochemical cycling. Yet, the functional exploration of its microbial communities lags far behind that of other marine realms. Here we analyze microbial bathypelagic metagenomes from the Atlantic, Indian, and Pacific Oceans of the Malaspina Global Expedition, aiming to determine the metabolic architecture of the deep ocean microbiome. We generated the Malaspina Gene Database, 71% of which consists of novel genes, that reveals a strong dichotomy between the functional traits of free-living and particle-attached microorganisms, and highlights a patchy geographic distribution of metabolic functions, challenging the paradigm of a uniform dark ocean ecosystem. Additionally, we uncovered new references for deep ocean microbial taxa, and revealed mixotrophy as a widespread trophic strategy. These results expand our understanding of the functional microbial structure and metabolic versatility, as well as carbon cycling in the largest aquatic ecosystem on Earth.

Read in full at bioRxiv.

This is an abstract of a preprint hosted on an independent third party site. It has not been peer reviewed but is currently under consideration at Nature Communications.

Nature Communications

Nature Research, Springer Nature