Undaria pinnatifida exudates trigger shifts in seawater chemistry and microbial communities from Atlantic Patagonian coasts
| العنوان: | Undaria pinnatifida exudates trigger shifts in seawater chemistry and microbial communities from Atlantic Patagonian coasts |
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| المؤلفون: | Gregorio Bigatti, María del Carmen Diéguez, Monica Noemi Gil, Mariana Lozada, Juan Pablo Livore, Patricia Elizabeth Garcia, Hebe M. Dionisi, Erica Giarratano |
| المصدر: | Biological Invasions. 23:1781-1801 |
| بيانات النشر: | Springer Science and Business Media LLC, 2021. |
| سنة النشر: | 2021 |
| مصطلحات موضوعية: | 0106 biological sciences, Epsilonproteobacteria, Ecology, Chemistry, 010604 marine biology & hydrobiology, Flavobacteriales, Biology, biology.organism_classification, 010603 evolutionary biology, 01 natural sciences, Vibrio, Algae, Microbial population biology, Arcobacter, Gammaproteobacteria, Botany, Seawater, Ecology, Evolution, Behavior and Systematics |
| الوصف: | The invasive kelp Undaria pinnatifida has spread from northeastern Asia to temperate coastal environments worldwide, with profound effects on colonized ecosystems. In this work, we analyzed the effect of exudates from U. pinnatifida on the chemical and microbial properties of seawater from a semi-enclosed gulf from Atlantic Patagonia. Exudates of U. pinnatifida, consisting mainly of carbohydrates, were released at a rate of 1.6 ± 0.8 mg C g−1 algae day−1, affecting the quality and optical properties of seawater in experimental incubations. Parallel factor analysis based on excitation-emission matrices collected from exudates revealed the presence of two humic-like and one non-humic fluorescent components. Exudate release stimulated microbial growth and polysaccharide degrading activity in seawater. After a 7-day incubation of fresh seawater with the exudates, changes in microbial community structure were analyzed by large-scale 16S rRNA gene amplicon sequencing. Copiotrophic and fermentative genera such as Spirochaeta (Spirochaetes) and Propionigenium (Fusobacteria) increased in the incubations with algal exudates. Genomic potential prediction revealed that the selected bacterial community could have higher ribosome content - an indicator of the potential for reaching higher metabolic rates - and genes for the degradation of complex organic compounds such as polysaccharides and other carbohydrates present in the exudates. Nutrient addition triggered the emergence of other microbial populations with different ecophysiological niches: unclassified Flavobacteriales, unclassified bacteria related to the recently described Phylum Kiritimatiellaeota, as well as potential pathogens such as Vibrio (Gammaproteobacteria) and Arcobacter (Epsilonproteobacteria), suggesting potential synergistic effects between invasive macroalgae and human activities. |
| تدمد: | 1573-1464 1387-3547 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5cbb16e9904d070af1a5fb63bd7d4f03 https://doi.org/10.1007/s10530-021-02471-1 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....5cbb16e9904d070af1a5fb63bd7d4f03 |
| قاعدة البيانات: | OpenAIRE |
Find this article in full text from Springer Verlag. | تدمد: | 15731464 13873547 |
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