Recurrent marine heatwaves compromise the reproduction success and long-term viability of shallow populations of the Mediterranean gorgonian Eunicella singularis

IF 3 3区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES Marine environmental research Pub Date : 2024-10-30 DOI:10.1016/j.marenvres.2024.106822

Julia Sarda , Andrea Gori , Ruth Doñate-Ordóñez , Núria Viladrich , Federica Costantini , Joaquim Garrabou , Cristina Linares

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Abstract

Mediterranean gorgonians are being threatened by the impact of recurrent extreme climatic events, such as marine heatwaves (MHWs). The white gorgonian Eunicella singularis was suggested to be the most resistant gorgonian species in the NW Mediterranean, mainly due to the presence of symbiotic algae. However, a substantial shift in the conservation condition of the species has been observed in the recent years. The aim of this study is to evaluate the lethal and sublethal effects of recent MHWs on the populations of E. singularis. Our results show that recurrent MHWs have impacted both the demography and reproduction of the species between 2002 and 2020, driving mortalities up to 36%, an increase in the percentages of non-reproducing adult colonies (11–58%), and a significant decrease in the recruitment rates. Although E. singularis is a highly dynamic species in comparison with other temperate gorgonians, the present study suggests that the persistence of this species may be severely compromised under recurrent MHWs, at least at shallowest depths.

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反复出现的海洋热浪损害了地中海芡实 Eunicella singularis 浅海种群的繁殖成功率和长期生存能力。

地中海藻类正受到经常性极端气候事件（如海洋热浪）的威胁。白海棠 Eunicella singularis 被认为是地中海西北部最具抵抗力的海棠物种，这主要是由于共生藻的存在。然而，近年来观察到该物种的保护状况发生了很大变化。本研究的目的是评估最近的 MHW 对奇异藻种群的致死和亚致死影响。我们的研究结果表明，2002年至2020年期间，反复发生的MHW对该物种的人口和繁殖都产生了影响，导致死亡率高达36%，无法繁殖的成虫群落比例增加（11-58%），招募率显著下降。虽然与其他温带海龙相比，奇异海龙（E. singularis）是一个极具活力的物种，但本研究表明，在经常性的 MHWs 下，该物种的持久性可能会受到严重影响，至少在最浅的深度是如此。

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来源期刊

Marine environmental research 环境科学-毒理学

CiteScore

5.90

自引率

3.00%

发文量

217

审稿时长

46 days

期刊介绍： Marine Environmental Research publishes original research papers on chemical, physical, and biological interactions in the oceans and coastal waters. The journal serves as a forum for new information on biology, chemistry, and toxicology and syntheses that advance understanding of marine environmental processes. Submission of multidisciplinary studies is encouraged. Studies that utilize experimental approaches to clarify the roles of anthropogenic and natural causes of changes in marine ecosystems are especially welcome, as are those studies that represent new developments of a theoretical or conceptual aspect of marine science. All papers published in this journal are reviewed by qualified peers prior to acceptance and publication. Examples of topics considered to be appropriate for the journal include, but are not limited to, the following: – The extent, persistence, and consequences of change and the recovery from such change in natural marine systems – The biochemical, physiological, and ecological consequences of contaminants to marine organisms and ecosystems – The biogeochemistry of naturally occurring and anthropogenic substances – Models that describe and predict the above processes – Monitoring studies, to the extent that their results provide new information on functional processes – Methodological papers describing improved quantitative techniques for the marine sciences.