Ecological function and interaction of different bacterial groups during alginate processing in coastal seawater community

Cha, Qian-Qian; Liu, Sha-Sha; Dang, Yan-Ru; Ren, Xue-Bing; Xu, Fei; Li, Ping-Yi; Chen, Xiu-Lan; Wang, Peng; Zhang, Xi-Ying; Zhang, Yu-Zhong; Qin, Qi-Long

doi:10.1016/j.envint.2023.108325

Cited by 4 publications

(1 citation statement)

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“…While specific members within these families can incorporate alginate (Thomas et al, 2021) or utilize its constituent oligomers (Wolter et al, 2021), little is known about the potential of Psychrosphaera and Cognatishimia for alginate degradation. However, specific members of Pseudoalteromonadaceae are known to transcribe alginate lyases in marine systems (Cha et al, 2023). Furthermore, these taxa only dominated in the South Pacific, despite being detected in the Equatorial (up to ca.…”

Section: Discussionmentioning

confidence: 99%

Distinct bacterial succession and functional response to alginate in the South, Equatorial, and North Pacific Ocean

Balmonte,

Giebel,

Arnosti

et al. 2024

Environmental Microbiology

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The availability of alginate, an abundant macroalgal polysaccharide, induces compositional and functional responses among marine microbes, but these dynamics have not been characterized across the Pacific Ocean. We investigated alginate‐induced compositional and functional shifts (e.g., heterotrophic production, glucose turnover, hydrolytic enzyme activities) of microbial communities in the South Subtropical, Equatorial, and Polar Frontal North Pacific in mesocosms. We observed that shifts in response to alginate were site‐specific. In the South Subtropical Pacific, prokaryotic cell counts, glucose turnover, and peptidase activities changed the most with alginate addition, along with the enrichment of the widest range of particle‐associated taxa (161 amplicon sequence variants; ASVs) belonging to Alteromonadaceae, Rhodobacteraceae, Phormidiaceae, and Pseudoalteromonadaceae. Some of these taxa were detected at other sites but only enriched in the South Pacific. In the Equatorial Pacific, glucose turnover and heterotrophic prokaryotic production increased most rapidly; a single Alteromonas taxon dominated (60% of the community) but remained low (<2%) elsewhere. In the North Pacific, the particle‐associated community response to alginate was gradual, with a more limited range of alginate‐enriched taxa (82 ASVs). Thus, alginate‐related ecological and biogeochemical shifts depend on a combination of factors that include the ability to utilize alginate, environmental conditions, and microbial interactions.

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Section: Discussionmentioning

confidence: 99%