Symbiotic UCYN-A strains co-occurred with El Nino, relaxed upwelling, and varied eukaryotes over 10 years off Southern California.

ABSTRACT: Biological nitrogen fixation, the conversion of N₂ gas into a bioavailable form, is vital to sustaining marine primary production. Studies have shifted beyond traditionally studied tropical diazotrophs. Candidatus Atelocyanobacterium thalassa (or UCYN-A) has emerged as a focal point due to its streamlined metabolism, intimate partnership with a haptophyte host, and broad distribution. Here, we explore the environmental parameters that govern UCYN-A's presence at the San Pedro Ocean Time-series (SPOT), its host specificity, and statistically significant interactions with non-host eukaryotes from 2008-2018. 16S and 18S rRNA gene sequences were amplified by "universal primers" from monthly samples and resolved into Amplicon Sequence Variants, allowing us to observe multiple UCYN-A

SUBMITTER: Fletcher-Hoppe C 

PROVIDER: S-EPMC10290647 | biostudies-literature | 2023 Jun

REPOSITORIES: biostudies-literature