Naslov
Dynamics of sediment microbial communities during a seagrass meadow decline

Autori
Markovski, Marsej ; Korlević, Marino ; Herndl, J., Gerhard ; Najdek, Mirjana

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Abstracts of the 6th Central European Forum for Microbiology , Acta Microbiologica et Immunologica Hungarica, 68, Supplement-1 / Szabo, Dora - Budimpešta : Akadémiai Kiadó, 2021, 94-94

Skup
6th Central European Forum for Microbiology

Mjesto i datum
Kecskemét, Mađarska, 13.10.2021. - 15.10.2021

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Seagrass meadow sediments ; 16S rRNA ; Cymodocea nodosa

Sažetak
Seagrass meadow sediments harbor diverse and abundant microbial communities and are considered to be hot spots for microbial activity. During the last few decades, a severe decline of different seagrass species has been reported. Although the taxonomy of microorganisms in seagrass meadow sediments has been described, little is known about their response to a meadow decline. Illumina MiSeq sequencing of the V4 region of the 16S rRNA gene was performed on sediment samples originating from a declining Cymodocea nodosa meadow in order to assess the effect of a meadow decline on microbial sediment communities. Sampling was carried out in surface sediments at monthly intervals. For comparison, sediment communities from an adjacent non-vegetated area were also characterized. Richness estimators and diversity indices displayed a decreasing trend with sediment depth, while community analysis at the level of OTUs showed differentiation primarily by sediment depth and secondly by the presence or absence of seagrass vegetation. Even though the Cymodocea nodosa meadow reached a point where almost no leaves were present no clear temporal community variation was observed. Taxonomic analysis revealed a clear dominance of bacterial over archaeal reads with most archaeal sequences classified as Nanoarchaeota, Thermoplasmatota, Crenarchaeota and Asgardarchaeota. The bacterial community was mainly composed of Desulfobacterota, Proteobacteria, Bacteroidota and Chloroflexi. Taken together, our results indicate that changing environmental conditions caused by the decline of the Cymodocea nodosa meadow did not have a strong effect on the sediment microbial community composition.

Izvorni jezik
Engleski

Znanstvena područja
Biologija, Interdisciplinarne prirodne znanosti

POVEZANOST RADA