Naslov
Seasonal phytoplankton dynamics in the coastal waters of the north-eastern Adriatic Sea

Autori
Godrijan, Jelena ; Marić, Daniela ; Tomažić, Igor ; Precali, Robert ; Pfannkuchen, Martin

Izvornik
Journal of sea research (1385-1101) 77 (2013); 32-44

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

Ključne riječi
coastal ecosystem; northern Adriatic Sea; phytoplankton succession; seasonal dynamics

Sažetak
This study describes the dynamics of phytoplankton in relation to environmental factors in coastal waters of the north-eastern Adriatic Sea. The distant Po River‟s influence is rarely noted on the eastern coastal part of the northern Adriatic, but it does trigger the crucial alternations in the community, e.g. mass development of diatoms in July 2009. A highly variable ecosystem, like the northern Adriatic, sustains high species diversity. Even though quite a few species were present for more than several months, we identified the seminal species of the seasonal succession. During spring Prorocentrum micans, Leptocylindrus minimus, Chaetoceros throndsenii, Ceratium furca and C. fusus were most characteristic. These species thrive in low salinity and mixed waters. Typical summer diatom species were Chaetoceros vixvisibilis, Proboscia alata, while Rhabdosphaera clavigera and Syracosphaera pulchra were identified as distinctive summer coccolithophorids. All the summer species preferred warmer waters with low nitrate and low silica content. The autumn community was characterised by species such as Calciosolenia murrayi, Chaetoceros socialis, Asterionellopsis glacialis, Lioloma pacificum. These species related to high nutrient conditions, but also to low Po River influence. In winter a prevalence of large diatoms Thalassiosira rotula, Neocalyptrella robusta and Pseudosolenia calcar-avis was recorded. The winter assemblage was characterised by species of cold water preference able to grow in well mixed conditions.

Izvorni jezik
Engleski

Znanstvena područja
Geologija

POVEZANOST RADA