期刊
FEMS MICROBIOLOGY ECOLOGY
卷 97, 期 3, 页码 -出版社
OXFORD UNIV PRESS
DOI: 10.1093/femsec/fiab020
关键词
Ulva sp; airborne microbes; bacterial abundance; bacterial production; Fv/Fm; daily growth rate
类别
资金
- Israel Science Foundation [1211/17]
- NSF-OCE [0850467]
- Mermex TRANCOMED grant of the French ENVIMED program
The study shows that viable airborne microbes can restore the natural microbial epibionts communities of Ulva ohnoi, thereby maintaining the seaweed's growth and health. This suggests that microbes delivered through atmospheric aerosols can impact epiphyte biodiversity in marine flora, particularly in areas with high annual atmospheric dust deposition like the Mediterranean Sea.
The marine macroalgae Ulva sp. is considered an ecosystem engineer in rocky shores of temperate waters worldwide. Ulva sp. harbors a rich diversity of associated microbial epibionts, which are known to affect the algae's typical morphological development and 'health'. We examined the interaction between airborne microbes derived from atmospheric aerosols and Ulva ohnoi growth and physiological state. Specifically, we measured U. ohnoi growth rates and photosynthetic efficiency (Fv/Fm), alongside its microbial epibionts abundance, activity and diversity following dust (containing nutrients and airborne microorganisms) or UV-treated dust (only nutrients) amendments to filtered seawater. Parallel incubations with epibionts-free U. ohnoi (treated with antibiotics that removed the algae epibionts) were also tested to specifically examine if dust-borne microbes can replenish the epibiont community of U. ohnoi. We show that viable airborne microbes can restore U. ohnoi natural microbial epibionts communities, thereby keeping the seaweed alive and 'healthy'. These results suggest that microbes delivered through atmospheric aerosols can affect epiphyte biodiversity in marine flora, especially in areas subjected to high annual atmospheric dust deposition such as the Mediterranean Sea.
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