Microeukaryote metabolism across the western North Atlantic Ocean revealed through autonomous underwater profiling

Natalie R. Cohen (), Arianna I. Krinos, Riss M. Kell, Rebecca J. Chmiel, Dawn M. Moran, Matthew R. McIlvin, Paloma Z. Lopez, Alexander J. Barth, Joshua P. Stone, Brianna A. Alanis, Eric W. Chan, John A. Breier, Michael V. Jakuba, Rod Johnson, Harriet Alexander and Mak A. Saito ()
Additional contact information
Natalie R. Cohen: University of Georgia Skidaway Institute of Oceanography
Arianna I. Krinos: Woods Hole
Riss M. Kell: Woods Hole
Rebecca J. Chmiel: Woods Hole
Dawn M. Moran: Woods Hole
Matthew R. McIlvin: Woods Hole
Paloma Z. Lopez: Woods Hole
Alexander J. Barth: University of South Carolina
Joshua P. Stone: University of South Carolina
Brianna A. Alanis: University of Texas Rio Grande Valley
Eric W. Chan: University of Texas Rio Grande Valley
John A. Breier: University of Texas Rio Grande Valley
Michael V. Jakuba: Woods Hole
Rod Johnson: Bermuda Institute of Ocean Sciences
Harriet Alexander: Woods Hole
Mak A. Saito: Woods Hole

Nature Communications, 2024, vol. 15, issue 1, 1-19

Abstract: Abstract Microeukaryotes are key contributors to marine carbon cycling. Their physiology, ecology, and interactions with the chemical environment are poorly understood in offshore ecosystems, and especially in the deep ocean. Using the Autonomous Underwater Vehicle Clio, microbial communities along a 1050 km transect in the western North Atlantic Ocean were surveyed at 10–200 m vertical depth increments to capture metabolic signatures spanning oligotrophic, continental margin, and productive coastal ecosystems. Microeukaryotes were examined using a paired metatranscriptomic and metaproteomic approach. Here we show a diverse surface assemblage consisting of stramenopiles, dinoflagellates and ciliates represented in both the transcript and protein fractions, with foraminifera, radiolaria, picozoa, and discoba proteins enriched at >200 m, and fungal proteins emerging in waters >3000 m. In the broad microeukaryote community, nitrogen stress biomarkers were found at coastal sites, with phosphorus stress biomarkers offshore. This multi-omics dataset broadens our understanding of how microeukaryotic taxa and their functional processes are structured along environmental gradients of temperature, light, and nutrients.

Date: 2024
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DOI: 10.1038/s41467-024-51583-4

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