Understanding the response of species to disturbance and the ability to recover is crucial for preventing their potential collapse and ecosystem phase shifts. Explosive submarine activity, occurring in shallow volcanic vents, can be considered as a natural pulse disturbance, due to its suddenness and high intensity, potentially affecting nearby species and ecosystems. Here, we present the response of Posidonia oceanica, a long-lived seagrass, to an exceptional submarine volcanic explosion, which occurred in the Aeolian Archipelago (Italy, Mediterranean Sea) in 2002, and evaluate its resilience in terms of time required to recover after such a pulse event. The study was carried out in 2011 in the sea area off Panarea Island, in the vicinity of Bottaro Island by adopting a back-dating methodological approach, which allowed a retrospective analysis of the growth performance and stable carbon isotopes (δ¹³C) in sheaths and rhizomes of P. oceanica, during a 10-year period (2001–2010). After the 2002 explosion, a trajectory shift towards decreasing values for both the growth performance and δ¹³C of rhizomes was observed. The decreasing trend reversed in 2004 when recovery took place progressively for all the analysed variables. Full recovery of P. oceanica occurred 8 years after the explosive event with complete restoration of all the variables (rhizome growth performance and δ¹³C) by 2010. Given the ecological importance of this seagrass in marine coastal ecosystems and its documented large-scale decline, the understanding of its potential recovery in response to environmental changes is imperative.

了解物种对扰动的反应和恢复能力对于防止其潜在的崩溃和生态系统相移至关重要。由于其突然性和高强度，在浅火山喷口中发生的爆炸性海底活动可视为自然脉冲扰动，可能影响附近的物种和生态系统。在这里，我们介绍海洋波塞冬（Posidonia oceanica）的反应，这是一种长寿命的海草，直到2002年在伊奥里亚群岛（意大利，地中海）发生的一次特殊的海底火山爆发，并根据发生这种脉冲事件后恢复所需的时间来评估其弹性。该研究是在2011年海域关闭帕纳里亚岛采用背约会的方法途径，其允许的生长性能和稳定的碳同位素的回顾性分析（δ进行，Bottaro的岛附近¹³在护套C）在10年期间（2001-2010年）和大洋洲根茎。2002年的爆炸，迈向生长性能和δ既减少值的轨迹后移¹³观察到根茎C。当所有分析变量逐步恢复时，下降趋势在2004年发生了逆转。完全恢复P.大洋洲的发生与所有变量的完全恢复的爆炸事件8年后（根茎生长性能和δ ¹³ C）在2010年鉴于这种海草在海洋沿岸生态系统及其记载的大规模下降的生态重要性因此，必须了解其响应环境变化的潜在恢复能力。