Naslov
Insights into the life strategy of the common marine diatom Chaetoceros peruvianus Brightwell

Autori
Smodlaka Tanković, Mirta ; Baričević, Ana ; Ivančić, Ingrid ; Kužat, Nataša ; Medić, Nikola ; Pustijanac, Emina ; Novak, Tihana ; Gašparović, Blaženka ; Marić Pfannkuchen, Daniela ; Pfannkuchen, Martin

Izvornik
PLoS One (1932-6203) 1 (2018); E0203634, 21

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

Ključne riječi
phytoplankton ; Adriatic Sea ; diatoms ; Chaetoceros peruvianus ; APA ; P limitation

Sažetak
Chaetoceros peruvianus is a marine diatom species with circumglobal distribution. While frequently observed, it appears never to dominate the marine phytoplankton community hence it can be characterized as a rather opportunistic, generalistic species. Here we present ecological interpretations from a long-term data set on marine microphytoplankton in the northern Adriatic Sea, where the abundancies and relative contributions of C. peruvianus were observed along a set of steep ecological gradients. Limited supply of dissolved inorganic phosphate was identified as the driving ecological factor for this ecosystem. In parallel C. peruvianus was cultivated in monoclonal cultures and its morphological and physiological reaction to replete and phosphorus depleted medium was analysed. C. peruvianus reacted to phosphorus depletion by an increase in cell height and length as well as thickness and length of setae. This morphological reaction included an increase in cellular volume and calculated carbon content. Additionally, it represents the transition between two described morphological varieties, C. peruvianus and C. peruvianus var. robusta. C. peruvianus showed a significant induction of extracellular alkaline phosphatase activity if grown in phosphate depleted medium. Microscopical analysis demonstrated this activity to be located exclusively on the setae of the cells.

Izvorni jezik
Engleski

Znanstvena područja
Biologija, Interdisciplinarne prirodne znanosti

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