Naslov
Seasonal aspects of bacterial diversity along trophic gradient in the eastern Adriatic Sea

Autori
Trumbić Željka, Stojan Iva, Lepen Pleić Ivana, Vrdoljak Tomaš Ana, Fredotović Željana, Šantić Danijela

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

Skup
18th International Symposium on Microbial Ecology (ISME18)

Mjesto i datum
Lausanne, Švicarska, 14.08.2022. - 19.08.2022

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
CARD FISH, Adriatic Sea

Sažetak
Bacterioplankton represent major constituents of marine food webs and participate in biogeochemical cycles of all major elements essential for life. They are metabolically and taxonomically diverse community strongly shaped by environmental factors (temperature, salinity, nutrients, predation). The biodiversity and seasonality of different bacterial groups was assessed along a trophic gradient in the eastern Adriatic Sea during one year of monthly sampling performed within ADRISAAF project. Sampling included three stations: a near shore coastal location in the Kaštela bay near Split, Croatia ; a semi-open canal and an oligotrophic location near the island of Vis. The structure of bacterial communities was assessed by catalyzed reporter deposition-fluorescence in situ hybridization (CARD-FISH). Preliminary results suggest a seasonal and spatial trend in bacterial diversity and community structure. One of major community constituents was the clade SAR11 with increased abundance during spring in euphotic zone of eutrophic waters, and deeper layers during winter in oligotrophic waters. Bacterial communities were characterized by Bacteroidetes and Gammaproteobacteria in deeper layers of oligotrophic waters and Alphaproteobacteria in surface layers of eutrophic waters. The Roseobacter group, physiologically and genetically versatile clade within Rhodobacteraceae (Alphaproteobacteria), increased their abundance in spring and autumn in surface to 30 m deep waters of coastal areas. The results are discussed and compared to environmental variables. These data represent the first comprehensive analysis of major bacterial groups in the Eastern Middle Adriatic Sea aiding in the understanding of the food web dynamics in the investigated ecosystem.

Izvorni jezik
Engleski

Znanstvena područja
Biologija, Interdisciplinarne prirodne znanosti

POVEZANOST RADA