Recovery of a symbiotic octocoral Sinularia heterospiculata after heat stress exposure

IF 0.9 4区生物学 Q3 MARINE & FRESHWATER BIOLOGY

Marine and Freshwater Behaviour and Physiology Pub Date : 2022-09-06 DOI:10.1080/10236244.2022.2120816

T. V. Sikorskaya, E. Ermolenko, A. Boroda

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Abstract

ABSTRACT Extending our knowledge about the bleaching and recovery processes in octocorals can offer valuable insights to predict future reef responses to continuing climate change. The octocoral Sinularia heterospiculata was exposed to a heat stress (32°C) for 2 days and then recovered within 205 days. The coral’s response was assessed by measuring total lipids, chlorophylls , carotenoids, and relative endosymbiont density. During the bleaching period, the coral lost half of its dinoflagellate symbionts; during the recovery period, it could completely restore their population. Photosynthetic activity of dinoflagellate symbionts was reduced after 1 week of recovery. However, the level of lipids was stable. The contents of chlorophyll b after the 2-day bleaching period increased relative to their proportion in the endosymbionts, which may be associated with the chlorophyll repackaging and absorption of more light. The content of carotenoids increases, which is probably associated with the complementary function of carotenoids as antioxidants.

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热应激暴露后共生八珊瑚异棘环虫的恢复

扩展我们对八月珊瑚白化和恢复过程的了解，可以为预测未来珊瑚礁对持续气候变化的反应提供有价值的见解。在32℃的高温胁迫下，八珊瑚虫(Sinularia heterospiculata)生长2 d, 205 d内恢复。珊瑚的反应通过测量总脂质、叶绿素、类胡萝卜素和相对内共生密度来评估。在白化期间，珊瑚失去了一半的鞭毛藻共生体;在恢复期，可以完全恢复种群数量。恢复1周后，鞭毛藻共生体的光合活性下降。然而，脂质水平是稳定的。经过2 d漂白后，叶绿素b含量相对于其在共生菌中的比例有所增加，这可能与叶绿素重新包装和吸收更多的光有关。类胡萝卜素的含量增加，这可能与类胡萝卜素作为抗氧化剂的补充功能有关。

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来源期刊

Marine and Freshwater Behaviour and Physiology 生物-海洋与淡水生物学

CiteScore

2.10

自引率

0.00%

发文量

审稿时长

>12 weeks

期刊介绍： Marine and Freshwater Behaviour and Physiology is devoted to the publication of papers covering field and laboratory research into all aspects of the behaviour and physiology of all marine and freshwater animals within the contexts of ecology, evolution and conservation. As the living resources of the world’s oceans, rivers and lakes are attracting increasing attention as food sources for humans and for their role in global ecology, the journal will also publish the results of research in the areas of fisheries biology and technology where the behaviour and physiology described have clear links to the contexts mentioned above. The journal will accept for publication Research Articles, Reviews, Rapid Communications and Technical Notes (see Instructions for authors for details). In addition, Editorials, Opinions and Book Reviews (invited and suggested) will also occasionally be published. Suggestions to the Editor-In-Chief for Special Issues are encouraged and will be considered on an ad hoc basis. With the goal of supporting early career researchers, the journal particularly invites submissions from graduate students and post-doctoral researchers. In addition to recognising the time constraints and logistical limitations their research often faces, and their particular need for a prompt review process, accepted articles by such researchers will be given prominence within the journal (see Instructions for authors for details).

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