The Interplay of Phototrophic and Heterotrophic Microbes Under Oil Exposure: A Microcosm Study.
co-occurrence
eukaryotes
heterotrophs
interactions
oil
photosynthesis
phototrophs
prokaryotes
Journal
Frontiers in microbiology
ISSN: 1664-302X
Titre abrégé: Front Microbiol
Pays: Switzerland
ID NLM: 101548977
Informations de publication
Date de publication:
2021
2021
Historique:
received:
02
03
2021
accepted:
28
06
2021
entrez:
19
8
2021
pubmed:
20
8
2021
medline:
20
8
2021
Statut:
epublish
Résumé
Microbial interactions influence nearly one-half of the global biogeochemical flux of major elements of the marine ecosystem. Despite their ecological importance, microbial interactions remain poorly understood and even less is known regarding the effects of anthropogenic perturbations on these microbial interactions. The Deepwater Horizon oil spill exposed the Gulf of Mexico to ∼4.9 million barrels of crude oil over 87 days. We determined the effects of oil exposure on microbial interactions using short- and long-term microcosm experiments with and without Macondo surrogate oil. Microbial activity determined using radiotracers revealed that oil exposure negatively affected substrate uptake by prokaryotes within 8 h and by eukaryotes over 72 h. Eukaryotic uptake of heterotrophic exopolymeric substances (EPS) was more severely affected than prokaryotic uptake of phototrophic EPS. In addition, our long-term exposure study showed severe effects on photosynthetic activity. Lastly, changes in microbial relative abundances and fewer co-occurrences among microbial species were mostly driven by photosynthetic activity, treatment (control vs. oil), and prokaryotic heterotrophic metabolism. Overall, oil exposure affected microbial co-occurrence and/or interactions possibly by direct reduction in abundance of one of the interacting community members and/or indirect by reduction in metabolism (substrate uptake or photosynthesis) of interacting members.
Identifiants
pubmed: 34408728
doi: 10.3389/fmicb.2021.675328
pmc: PMC8366316
doi:
Types de publication
Journal Article
Langues
eng
Pagination
675328Informations de copyright
Copyright © 2021 Kamalanathan, Schwehr, Labonté, Taylor, Bergen, Patterson, Claflin, Santschi and Quigg.
Déclaration de conflit d'intérêts
The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.
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