RT Conference Proceedings
T1 How can seasonality modulate thermal sensitivity in early stages of fucoids?: The colder, the better
A1 Sánchez de Pedro Crespo, Raquel
A1 Fernández, Andrea N.
A1 García-Sánchez, María Jesús
A1 Flores-Moya, Antonio
A1 Bañares-España, Elena
K1 Mares y océanos - Temperatura
K1 Algas marinas
K1 Calentamiento global
AB In the face of ocean global change, determining critical thermal thresholds for marine organisms is akey aspect to predict the survival and persistence of populations, particularly those from rear-edgeareas. Seasonal variability implies acclimation of adult individuals, which might result in shifting thermalsensitivities of their recruits. In this work, we aimed to investigate the influence of natural seasonal parentalacclimation on the warming response of single- and few-celled stages of Fucus guiryi, a monoeciousfucoid from the east Atlantic coast and Strait of Gibraltar, whose populations are iteroparous. To addressthis, we obtained embryos from fertile thalli collected in early summer, late summer, and winter. In thethree replicate experiments under laboratory-controlled conditions, we followed growth, development,survival, and photosynthetic responses of embryos exposed to control (15ºC) and warming conditions(25ºC) for 3 weeks, and initial elemental composition was characterized. Our findings revealed thatbreeding from winter parents possessed broader thermal sensitivity and thrived better under warmingconditions than those from summer specimens, where only 50% survived and experience 75% reductionsin photosynthetic rates. Nevertheless, there was a significant gain in thermal resilience from early to latesummer regarding survival at 25º C. This research highlighted that warmer winters would not potentiallyharm new recruits, while extreme temperature events in early summer might compromise the survivalof the most sensitive early summer recruits, considering the RCP8.5 predictions for 2050. The influenceof parental and provisioning effects and how this might be applied to ecological restoration is discussed.
PB 12th International Phycological Congress (IPC21)
YR 2020
FD 2020-03-22
LK https://hdl.handle.net/10630/21356
UL https://hdl.handle.net/10630/21356
LA eng
NO 12th International Phycological Congress. Abstracts book. SYM13: Ocean Global Change: acclimation and adaptation to multiple environmental drivers. p.268
NO Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech.
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 21 ene 2026