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Vivanco-Bercovich, Manuel; Sandoval-Gil, Jose Miguel; Bonet-Meliá, Paula; Cabello-Pasini, Alejandro; Muñiz-Salazar, Raquel; Montoya, Leonardo Ruiz; Schubert, Nadine; Marín-Guirao, Lázaro; Procaccini, Gabriele; Ferreira-Arrieta, Alejandra
Marine pollution bulletin, February 2024, 2024-Feb, 2024-02-00, 20240201, Letnik: 199Journal Article
The surfgrass Phyllospadix scouleri grows in highly productive meadows along the Pacific coast of North America. This region has experienced increasingly severe marine heatwaves (MHWs) in recent years. Our study evaluated the impact of consecutive MHWs, simulated in mesocosms, on essential ecophysiological features of P. scouleri. Overall, our findings show that the plants' overall physiological status has been progressively declining. Interestingly, the indicators of physiological stress in photosynthesis only showed up once the initial heat exposure stopped (i.e., during the recovery period). The warming caused increased oxidative damage and a decrease in nitrate uptake rates. However, the levels of non-structural carbohydrates and relative growth rates were not affected. Our findings emphasize the significance of incorporating recovery periods in this type of study as they expose delayed stress responses. Furthermore, experiencing consecutive intense MHWs can harm surfgrasses over time, compromising the health of their meadows and the services they offer to the ecosystem. •Surfgrasses are potentially threatened by more frequent marine heatwaves.•Responses to simulated consecutive heatwaves examined in Phyllospadix scouleri.•Elevated oxidative damage and reduced nitrate uptake evidenced thermal stress.•Decline in photosynthetic performance was more pronounced during recovery periods.•Repeated marine heatwaves cause progressive physiological weakening in P. scouleri.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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in: SICRIS
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