Rindi Luca, He Jianyu, Miculan Mara, Dell'Acqua Matteo, Pè Mario Enrico, Benedetti-Cecchi Lisandro
Department of Biology, University of Pisa, Pisa, Italy.
Marine Science and Technology College, Zhejiang Ocean University, Zhoushan City, Zhejiang, China.
Nat Commun. 2025 Mar 11;16(1):2442. doi: 10.1038/s41467-025-57258-y.
The increasing frequency and intensity of extreme climate events are driving significant biodiversity shifts across ecosystems. Yet, the extent to which these climate legacies will shape the response of ecosystems to future perturbations remains poorly understood. Here, we tracked taxon and trait dynamics of rocky intertidal biofilm communities under contrasting regimes of warming (fixed vs. fluctuating) and assessed how they influenced stability dimensions in response to temperature extremes. Fixed warming enhanced the resistance of biofilm by promoting the functional redundancy of stress-tolerance traits. In contrast, fluctuating warming boosted recovery rate through the selection of fast-growing taxa at the expense of functional redundancy. This selection intensified a trade-off between stress tolerance and growth further limiting the ability of biofilm to cope with temperature extremes. Anticipating the challenges posed by future extreme events, our findings offer a forward-looking perspective on the stability of microbial communities in the face of ongoing climatic change.
极端气候事件的频率和强度不断增加，正推动着整个生态系统中生物多样性的显著变化。然而，这些气候遗留因素将在多大程度上塑造生态系统对未来扰动的响应，仍知之甚少。在这里，我们追踪了在不同变暖模式（固定变暖与波动变暖）下岩石潮间带生物膜群落的分类群和性状动态，并评估了它们如何影响应对极端温度时的稳定性维度。固定变暖通过促进耐胁迫性状的功能冗余增强了生物膜的抗性。相比之下，波动变暖通过选择快速生长的分类群提高了恢复率，但牺牲了功能冗余。这种选择加剧了耐胁迫性与生长之间的权衡，进一步限制了生物膜应对极端温度的能力。鉴于未来极端事件带来的挑战，我们的研究结果为面对持续气候变化时微生物群落的稳定性提供了前瞻性视角。
