RT journal article
T1 Potential Polyunsaturated Aldehydes in the Strait of Gibraltar under Two Tidal Regimes
A1 Morillo García, Soledad
A1 Valcárcel Pérez, Nerea
A1 Cózar Cabañas, Andrés
A1 Ortega, María J.
A1 Macías, Diego
A1 Ramírez Romero, Eduardo
A1 M. García, Carlos
A1 Echevarría Navas, Fidel María
A1 Bartual Magro, Ana
A2 Biología
A2 Química Orgánica
K1 polyunsaturated aldehydes
K1 diatoms
K1 physiological stress
K1 strait of gibraltar
K1 heptadienal
K1 octadienal
K1 decadienal
AB Diatoms, a major component of the large-sized phytoplankton, are able to produce and release polyunsaturated aldehydes after cell disruption (potential PUAs or pPUA). These organisms are dominant in the large phytoplankton fraction (>10 μm) in the Strait of Gibraltar, the only connection between the Mediterranean Sea and the Atlantic Ocean. In this area, the hydrodynamics exerts a strong control on the composition and physiological state of the phytoplankton. This environment offers a great opportunity to analyze and compare the little known distribution of larger sized PUA producers in nature and, moreover, to study how environmental variables could affect the ranges and potential distribution of these compounds. Our results showed that, at both tidal regimes studied (Spring and Neap tides), diatoms in the Strait of Gibraltar are able to produce three aldehydes: Heptadienal, Octadienal and Decadienal, with a significant dominance of Decadienal production. The PUA released by mechanical cell disruption of large-sized collected cells (pPUA) ranged from 0.01 to 12.3 pmol from cells in 1 L, and from 0.1 to 9.8 fmol cell−1. Tidal regime affected the abundance, distribution and the level of physiological stress of diatoms in the Strait. During Spring tides, diatoms were more abundant, usually grouped nearer the coastal basin and showed less physiological stress than during Neap tides. Our results suggest a significant general increase in the pPUA productivity with increasing physiological stress for the cell also significantly associated to low nitrate availability.
PB MDPI
YR 2014
FD 2014-03
LK http://hdl.handle.net/10498/20340
UL http://hdl.handle.net/10498/20340
LA eng
DS Repositorio Institucional de la Universidad de Cádiz
RD 12-nov-2026