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Bibliographic record number: 913752


Authors: Smodlaka Tanković, Mirta; Marić Pfannkuchen, Daniela; Godrijan, Jelena; Baričević, Ana; Kužat, Nataša; Djakovac, Tamara; Pustijanac, Emina; Jahn, Regine; Pfannkuchen, Martin
Title: 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
Source: Società Botanica Italiana, Gruppo di Algologia, Riunione Scientifica Annuale, Book of abstracts / Cabrini, Marina ; Cataletto, Bruno ; Falace, Annalisa ; Honsell, Giorgio ; Petrera, Francesca ; Spoto, Maurizio (ed). - Trst : Università degli Studi di Trieste , 2017. 48-48.
Meeting: Gruppo di Algologia, Riunione Scientifica Annuale
Location and date: Trst, Italija, 10-11.11.2017
Keywords: fitoplankton, Jadransko more, dijatomeje, Skeletonema
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.
Type of meeting: Predavanje
Type of presentation in a journal: Abstract
Type of peer-review: International peer-review
Original language: ENG
Category: Znanstveni
Research fields:
Interdisciplinary natural sciences
Contrib. to CROSBI by: Nataša Kužat (, 19. Pro. 2017. u 13:14 sati

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