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Warming impacts on early life stages increase the vulnerability and delay the population recovery of a long‐lived habitatforming macroalga

AuthorsCapdevila, Pol; Hereu, Bernat; Salguero‐Gómez, Roberto; Rovira, Graciel·la; Medrano, Alba; Cebrian, Emma CSIC ORCID ; Garrabou, Joaquim CSIC ORCID ; Kersting, D. K.; Linares, Cristina CSIC ORCID
Stress interactions
Climate change
Human impacts
Population ecology
Issue DateMay-2019
CitationJournal of Ecology 107(3): 1129-1140 (2019)
Abstract1. Understanding the combined effects of global and local stressors is crucial for conservation and management, yet challenging due to the different scales at which these stressors operate. Here, we examine the effects of one of the most pervasive threats to marine biodiversity, ocean warming, on the early life stages of the habitat‐forming macroalga Cystoseira zosteroides, its long‐term consequences for population resilience, and its combined effect with physical stressors. 2. First, we performed a controlled laboratory experiment exploring the impacts of warming on early life stages. Settlement and survival of germlings were measured at 16°C (control), 20°C, and 24°C, and both processes were affected by increased temperatures. Then, we integrated this information into stochastic, density‐dependent integral projection models. 3. Recovery time after a major disturbance significantly increased in warmer scenarios. The stochastic population growth rate (λs) was not strongly affected by warming alone, as high adult survival compensated for thermal‐induced recruitment failure. Nevertheless, warming coupled with recurrent physical disturbances had a strong impact on λs and population viability. 4. Synthesis. The impact of warming effects on early stages may significantly decrease the natural ability of habitat‐forming algae to rebound after major disturbances. These findings highlight that, in a global warming context, populations of deep‐water macroalgae will become more vulnerable to further disturbances, and stress the need to incorporate abiotic interactions into demographic models.
DescriptionEste artículo contiene 12 páginas, 5 figuras.
Publisher version (URL)https://doi.org/10.1111/1365-2745.13090
Appears in Collections:(CEAB) Artículos
(ICM) Artículos
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