RT Conference Proceedings
T1 Trace-metaldynamics in response of increase CO<sub>2</sub> and iron availability in a coastal mesocosm experiment
A1 Lorenzo, M. Rosario
A1 Maldonado, Maria T.
A1 Lázaro, Francisco J.
A1 Cullen, Jay T.
A1 Segovia-Azcorra, María
K1 Fitoplancton marino
AB A mesocosm experiment was performed in the Raunefjord (Norway) to study changes in dissolved Cu (dCu) and Fe (dFe), and in the elemental composition of particles during an <em>Emiliania huxleyi</em> dominated bloom. The CO<sub>2</sub> treatments consisted of present (LC; 390 ppmV) and predicted levels (HC; 900 ppmV) and iron conditions were created with the addition of the siderophore desferoxamine B (DFB). Our results showed the DFB addition enhanced the solubility of Fe in this fjord environment. Initially, dFe was comparable among treatments but after the addition, the HC and/or +DFB treatments presented higher levels and finally, the only ones maintaining high dFe were the +DFB treatments. Unlike dCu presented indistinguishable levels in all mesocosms over time. Particulate metals were normalised to P and Al to evaluate the relative influence of biotic and abiotic sources. The Fe:P ratios decreased with time and compared to published phytoplankton ratios suggest Fe storage. On the other hand, Fe:Al ratios were relatively closer to the crustal ratios suggesting that the abiotic source was more important for this metal. Trends for other metals will be discussed.
YR 2015
FD 2015-04-14
LK http://hdl.handle.net/10630/9653
UL http://hdl.handle.net/10630/9653
LA eng
NO Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech.
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 12 abr 2026