Naslov
Spatio-temporal reproducibility of the microbial food web structure associated with the change in temperature: Long-term observations in the Adriatic Sea

Autori
Šolić, Mladen ; Grbec, Branka ; Matić, Frano ; Šantić, Danijela ; Šestanović, Stefanija ; Ninčević Gladan, Živana ; Bojanić, Natalia ; Ordulj, Marin ; Jozić, Slaven ; Vrdoljak, Ana

Izvornik
Progress in oceanography (0079-6611) 161 (2018); 87-101

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Microbial food web ; Temperature ; Global warming ; Reproducibility in time ; Long term data ; Self-Organizing Map Analysis ; Adriatic Sea

Sažetak
Global and atmospheric climate change is altering the thermal conditions in the Adriatic Sea and, consequently, the marine ecosystem. Along the eastern Adriatic coast sea surface temperature (SST) increased by an average of 1.03 °C during the period from 1979 to 2015, while in the recent period, starting from 2008, a strong upward almost linear trend of 0.013 °C/month was noted. Being mainly oligotrophic, the middle Adriatic Sea is characterized by the important role played by the microbial food web in the production and transfer of biomass and energy towards higher trophic levels. It is very important to understand the effect of warming on microbial communities, since small temperature increases in surface seawater can greatly modify the microbial role in the global carbon cycle. In this study, the Self-Organizing Map (SOM) procedure was used to analyse the time series of a number of microbial parameters at two stations with different trophic status in the central Adriatic Sea. The results show that responses of the microbial food web (MFW) structure to temperature changes are reproducible in time. Furthermore, qualitatively similar changes in the structure of the MFW occurred regardless of the trophic status. The rise in temperature was associated with: (1) the increasing importance of microbial heterotrophic activities (increase bacterial growth and bacterial predator abundance, particularly heterotrophic nanoflagellates) and (2) the increasing importance of autotrophic picoplankton (APP) in the MFW.

Izvorni jezik
Engleski

Znanstvena područja
Geofizika, Interdisciplinarne prirodne znanosti

POVEZANOST RADA