RT Journal Article
T1 Physiological responses of the alien macroalga Rugulopteryx okamurae (Phaeophyceae, Heterokontophyta) to changes in nutrients and temperature
A1 Bonomi-Barufi, José
A1 López-Figueroa, Félix
A1 Vega, Julia
A1 Huesa, Ruben
A1 Harb, Talisa
A1 Avilés-Benítez, Antonio
A1 Mercado, Jesus Mariano
A1 Korbee-Peinado, Nathalie
K1 Ecofisiología
K1 Biomoléculas
K1 Fotosíntesis
K1 Algas marinas
K1 Temperatura - Efectos fisiológicos
AB The Asian brown macroalga R. okamurae has invaded the ultraoligotrophicareas of Mediterranean coasts since 2015, with drastic impacts on environmental conditions and socioeconomic activities in coastal areas in Europe.Therefore, it is intriguing how this species is able to grow and expand at theobserved rates. In this context, the physiological responses of R. okamuraeto changing nutrient concentrations and temperature were analyzed. Two experiments were conducted, evaluating six combinations of nitrate and phosphate concentrations and their potential interaction with temperature. Nutrientuptake efficiency (NUE) and rates (NUR), photosynthetic responses, growthrates, and biomass composition were evaluated. Photosynthesis parameters,soluble proteins, and NO−3-NUR increased with increasing N:P ratio; however,PO3−4 -NUR was very similar in all treatments. The species showed high capacity for nitrate assimilation, which was rapidly modulated by its externalconcentration and temperature (more than 90% of NO3-NUE after 5days intreatments with 5, 10, 16, 25, and 40N:1P). Consequently, N-nutrients wereremoved from the water by R. okamurae and likely stored inside the cells.This process will allow the alga to maintain high growth rates if thalli aremoved to oligotrophic areas, favoring its spreading to many marine environments. Additionally, fucoxanthin was the predominant carotenoid in this species, although its content was lower than in other brown macroalgae species(mean value of 0.51±0.05mg·g−1 DW). However, since a huge amount ofR. okamurae is observed recurrently on beaches, the use of this biomassmight be proposed to compensate partially for its impacts.
PB Wiley
YR 2024
FD 2024-12-06
LK https://hdl.handle.net/10630/40374
UL https://hdl.handle.net/10630/40374
LA eng
NO Bonomi-Barufi, J., Figueroa, F. L., Vega, J., Huesa, R., Harb, T. B., Avilés, A., Mercado, J. M., & Korbee, N. (2024). Physiological responses of the alien macroalga Rugulopteryx okamurae (Phaeophyceae, Heterokontophyta) to changes in nutrients and temperature. Journal of Phycology, 00, 1–17. https://doi.org/10.1111/jpy.13528
NO https://openpolicyfinder.jisc.ac.uk/id/publication/6911
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 20 ene 2026