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Bibliographic record number: 930773

Journal

Authors: Novak, Tihana; Godrijan, Jelena; Marić Pfannkuchen, Daniela; Djakovac, Tamara; Mlakar, Marina; Baricevic, Ana; Smodlaka Tanković, Mirta; Gašparović, Blaženka
Title: Enhanced dissolved lipid production as a response to the sea surface warming
Source: Journal of marine systems (0924-7963) 180 (2018); 289-298
Paper type: article
Keywords: Dissolved lipids ; DOC ; Diatom Chaetoceros pseudocurvisetus ; Northern Adriatic Sea ; Global warming
Abstract:
The temperature increase in oceans reflects on marine ecosystem functioning and surely has consequences on the marine carbon cycle and carbon sequestration. In this study, we examined dissolved lipid, lipid classes and dissolved organic carbon (DOC) production in the northern Adriatic Sea, isolated diatom Chaetoceros pseudocurvisetus batch cultures grown in a wide temperature range (10-30 °C) and in contrasting nutrient regimes, phosphorus (P)-depleted and P-replete conditions. Additionally, lipids and DOC were analysed in the northern Adriatic (NA) in two stations characterized with different P availability, occupied from February to August 2010 that covered a temperature range from 9.3 to 31.1 °C. To gain insight into factors governing lipid and lipid classes’ production in the NA, apart from temperature (T), chlorophyll a, phytoplankton community abundance and structure, nutrient concentrations were measured together with hydrographic parameters. We found enhanced accumulation of dissolved lipids, particulary glycolipids, with increasing T, especially during the highest in situ temperature. The effect of T on enhanced dissolved lipid release is much more pronounced under P-deplete conditions indicating that oligotrophic regions might be more vulnerable to T rise. Temperature between 25 and 30C is a threshold T range for C. pseudocurvisetus, at which a significant part of lipid production is directed towards the dissolved phase. Unlike monocultures, there are multiple factors influencing produced lipid composition, distribution and cycling in the NA that may counteract the T influence. The possible role of enhanced dissolved lipid concentration for carbon sequestration at elevated T is discussed. On the one hand, lipids are buoyant and do not sink, which enhances their retention at the surface layer. In addition, they are surface active, and therefore prone to adsorb on sinking particles, contributing to the C sequestration.
Project / theme: HRZZ-UIP-2014-09-6563, HRZZ-IP-2013-11-8607
Original language: ENG
Citation databases: Current Contents Connect (CCC)
Scopus
SCI-EXP, SSCI i/ili A&HCI
Science Citation Index Expanded (SCI-EXP) (sastavni dio Web of Science Core Collectiona)
Category: Znanstveni
Research fields:
Interdisciplinary natural sciences
Full paper text: 930773.Novak_J_Mar_Sys_2018.pdf (tekst priložen 15. Ožu. 2018. u 16:15 sati)
URL: https://www.sciencedirect.com/science/article/pii/S0924796317302567
Broj citata:
Altmetric:
DOI: 10.1016/j.jmarsys.2018.01.006
URL cjelovitog rada: https://www.sciencedirect.com/science/article/pii/S0924796317302567
Google Scholar: Enhanced dissolved lipid production as a response to the sea surface warming
Contrib. to CROSBI by: Blaženka Gašparović (Blazenka.Gasparovic@irb.hr), 15. Ožu. 2018. u 16:15 sati



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