Pronounced Diel Cycling of Dissolved Carbohydrates and Amino Acids in the Surface Ocean and across Diverse Regimes DOI Creative Commons
Theresa Barthelmeß, Antonia Cristi, Stacy Deppeler

и другие.

Environmental Science & Technology, Год журнала: 2024, Номер 59(1), С. 419 - 429

Опубликована: Дек. 20, 2024

The metabolism of phytoplankton cells is synchronized with the diel light cycle. Likewise, associated heterotrophic bacteria adjust their expression transporter- and catabolism-related genes to target dissolved organic matter released by cell. Dissolved combined carbohydrates (DCCHO) amino acids (DAA) are major products bacterial substrates. Here, we show that variations DCCHO DAA concentrations accounted for a significant turnover total carbon (TOC) pool (up 5.0%, at rate 0.37 μM C h–1) nitrogen (TON) 5.5%, 0.04 N across diverse oceanic regimes (sub-Antarctic subtropical waters Southwestern Pacific Ocean). Glucose contributed most observed turnover, while polar dominated turnover. concentration composition correlated viral abundance, suggesting lysis may have caused highest night. Our finding cycling supports notion universally ecosystem dynamics. Such periodicity enhance nutrient thus primary production constrains parts yet uncharacterized labile flux fueling microbial pump.

Язык: Английский

Evidence of nitrate-based nighttime atmospheric nucleation driven by marine microorganisms in the South Pacific DOI Creative Commons

Guillaume Chamba,

Matti Rissanen, Theresa Barthelmeß

и другие.

Proceedings of the National Academy of Sciences, Год журнала: 2023, Номер 120(48)

Опубликована: Ноя. 22, 2023

Our understanding of ocean–cloud interactions and their effect on climate lacks insight into a key pathway: do biogenic marine emissions form new particles in the open ocean atmosphere? Using measurements collected ship-borne air–sea interface tanks deployed Southwestern Pacific Ocean, we identified particle formation (NPF) during nighttime that was related to plankton community composition. We show nitrate ions are only species for which abundance could support NPF rates our semicontrolled experiments. Nitrate also prevailed natural pristine atmosphere were elevated under higher sub-10 nm concentrations. hypothesize these nucleation events fueled by complex, short-term biogeochemical cycling involving microbial loop. These findings suggest perspective with previously unidentified role origin aerosol nucleation.

Язык: Английский

Процитировано

2
Pronounced Diel Cycling of Dissolved Carbohydrates and Amino Acids in the Surface Ocean and across Diverse Regimes DOI Creative Commons
Theresa Barthelmeß, Antonia Cristi, Stacy Deppeler

и другие.

Environmental Science & Technology, Год журнала: 2024, Номер 59(1), С. 419 - 429

Опубликована: Дек. 20, 2024

The metabolism of phytoplankton cells is synchronized with the diel light cycle. Likewise, associated heterotrophic bacteria adjust their expression transporter- and catabolism-related genes to target dissolved organic matter released by cell. Dissolved combined carbohydrates (DCCHO) amino acids (DAA) are major products bacterial substrates. Here, we show that variations DCCHO DAA concentrations accounted for a significant turnover total carbon (TOC) pool (up 5.0%, at rate 0.37 μM C h–1) nitrogen (TON) 5.5%, 0.04 N across diverse oceanic regimes (sub-Antarctic subtropical waters Southwestern Pacific Ocean). Glucose contributed most observed turnover, while polar dominated turnover. concentration composition correlated viral abundance, suggesting lysis may have caused highest night. Our finding cycling supports notion universally ecosystem dynamics. Such periodicity enhance nutrient thus primary production constrains parts yet uncharacterized labile flux fueling microbial pump.

Язык: Английский

Процитировано

0