Use of organic exudates from two polar diatoms by bacterial isolates from the Arctic Ocean

Autor: Ingrid Obernosterer, Laetitia Dadaglio, Lucas Tisserand, Fabien Joux, Laurent Intertaglia, Philippe Catala, Christos Panagiotopoulos
Přispěvatelé: Laboratoire d'Océanographie Microbienne (LOMIC), Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire océanologique de Banyuls (OOB), Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Observatoire océanologique de Banyuls (OOB), Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Institut méditerranéen d'océanologie (MIO), Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Toulon (UTLN), Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Observatoire océanologique de Banyuls (OOB), Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS)
Rok vydání: 2020
Předmět:
010504 meteorology & atmospheric sciences
General Mathematics
[SDE.MCG]Environmental Sciences/Global Changes
Oceans and Seas
General Physics and Astronomy
01 natural sciences
Global Warming
Models
Biological
03 medical and health sciences
Dissolved organic exudates
Dissolved organic carbon
Arctic Ocean
Microalgae
Ice Cover
Seawater
14. Life underwater
Organic Chemicals
Ecosystem
Phylogeny
030304 developmental biology
0105 earth and related environmental sciences
Diatoms
0303 health sciences
Primary producers
Bacteria
Arctic Regions
Global warming
General Engineering
Biodiversity
Articles
Biodegradation
The arctic
Bacterial isolation
Biodegradation
Environmental
Community composition
Bacterial diversity
13. Climate action
Environmental chemistry
Phytoplankton
Environmental science
Polar
[SDE.BE]Environmental Sciences/Biodiversity and Ecology
Zdroj: Philos Trans A Math Phys Eng Sci
Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences
Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, Royal Society, The, 2020, 378, pp.20190356. ⟨10.1098/rsta.2019.0356⟩
Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 2020, 378, pp.20190356. ⟨10.1098/rsta.2019.0356⟩
ISSN: 1471-2962
1364-503X
Popis: Global warming affects primary producers in the Arctic, with potential consequences for the bacterial community composition through the consumption of microalgae-derived dissolved organic matter (DOM). To determine the degree of specificity in the use of an exudate by bacterial taxa, we used simple microalgae–bacteria model systems. We isolated 92 bacterial strains from the sea ice bottom and the water column in spring–summer in the Baffin Bay (Arctic Ocean). The isolates were grouped into 42 species belonging to Proteobacteria, Bacteroidetes, Actinobacteria and Firmicutes. Forty strains were tested for their capacity to grow on the exudate from two Arctic diatoms . Most of the strains tested (78%) were able to grow on the exudate from the pelagic diatom Chaetoceros neogracilis , and 33% were able to use the exudate from the sea ice diatom Fragilariopsis cylindrus . 17.5% of the strains were not able to grow with any exudate, while 27.5% of the strains were able to use both types of exudates. All strains belonging to Flavobacteriia ( n = 10) were able to use the DOM provided by C. neogracilis , and this exudate sustained a growth capacity of up to 100 times higher than diluted Marine Broth medium, of two Pseudomonas sp. strains and one Sulfitobacter strain. The variable bioavailability of exudates to bacterial strains highlights the potential role of microalgae in shaping the bacterial community composition. This article is part of the theme issue ‘The changing Arctic Ocean: consequences for biological communities, biogeochemical processes and ecosystem functioning'.
Databáze: OpenAIRE
Externí odkaz: