Naslov
The Ecology of One Cosmopolitan, One Newly Introduced and One Occasionally Advected Species from the Genus Skeletonema in a Highly Structured Ecosystem, the Northern Adriatic

Autori
Smodlaka Tanković, Mirta ; Marić Pfannkuchen, Daniela ; Godrijan, Jelena ; Baričević, Ana ; Kužat, Nataša ; Djakovac, Tamara ; Pustijanac, Emina ; Jahn, Regine ; Pfannkuchen, Martin

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

Izvornik
Società Botanica Italiana, Gruppo di Algologia, Riunione Scientifica Annuale : Book of abstracts / Cabrini, Marina ; Cataletto, Bruno ; Falace, Annalisa ; Honsell, Giorgio ; Petrera, Francesca ; Spoto, Maurizio - Trst : Università degli Studi di Trieste, 2017, 48-48

Skup
Gruppo di Algologia, Riunione Scientifica Annuale

Mjesto i datum
Trst, Italija, 10.11.2017. - 11.11.2017

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
fitoplankton ; Jadransko more ; dijatomeje ; Skeletonema
(phytoplankton ; Adriatic sea ; diatoms ; Skeletonema)

Sažetak
The diatom genus Skeletonema is globally distributed and often an important constituent of the phytoplankton community. In the marine phytoplankton of the northern Adriatic Sea, we found three species of the genus Skeletonema: Skeletonema menzelii, Skeletonema marinoi and Skeletonema grevillei. Making use of the steep ecological gradients that characterize the northern Adriatic, along which we could observe those species, we report here on the ecological circumstances under which those species thrive and how their respective populations are globally connected. This is the first detailed ecological study for the species S. grevillei. This study is also the first report for S. grevillei for the Adriatic Sea and Mediterranean together with additional electron microscopic details on fresh in situ samples for this species. S. marinoi appears to clearly prefer strong freshwater influence and high nutrient concentrations delivered by low salinity waters. It can outcompete other diatom species and dominate microphytoplankton blooms. S. grevillei on the other hand appears to thrive in high nutrient concentrations triggered by water column mixing. It also appears to prefer higher salinity waters and coastal embayments. Genetic analysis of S. grevillei demonstrated a peculiar dissimilarity with isolates from coastal waters off Yemen, India, Oman and China. However, a closely related sequence was isolated from coastal waters off Japan. These results indicate that S. grevillei is an introduced species, possibly transported by ballast waters. S. menzelii is a sporadic visitor in the northern Adriatic, advected from rather oligotrophic middle Adriatic waters and never dominates the phytoplankton community in the northern Adriatic.

Izvorni jezik
Engleski

Znanstvena područja
Interdisciplinarne prirodne znanosti

POVEZANOST RADA