In situ photosynthetic performance of Porites lutea inhabiting contrasting habitats of the Northern Straits of Malacca (NSoM), Malaysia

IF 0.9 4区生物学 Q3 MARINE & FRESHWATER BIOLOGY

Marine and Freshwater Behaviour and Physiology Pub Date : 2021-07-04 DOI:10.1080/10236244.2021.1956863

Nur Ain Amani Abdul Mubin, M. G. G. Jonik, Nadthikphorn Kamphol, Zakia Sultana Juhi, Mahadi Mohammad, Sazlina Salleh

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引用次数: 2

Abstract

ABSTRACT Coral reefs in the Northern Straits of Malacca (NSoM), Malaysia, are frequently exposed to high concentrations of total suspended solids (TSS), thus reducing the light availability for photosynthesis. This study describes the photosynthetic performances of Porites lutea inhabiting contrasting habitats of Pulau Kendi, Pulau Songsong, and Pulau Payar in the NSoM. The light attenuation (Kd (PAR)) was significantly different between all sites, whereby highly turbid water of Pulau Kendi has the highest Kd (PAR) (m−1) = 0.8 ± 0.0 and TSS (mg/L) = 95.7 ± 2.5 in comparison to the protected reef in Pulau Payar, Kd (PAR) (m−1) = 0.5 ± 0.0 and TSS (mg/L) = 36.7 ± 0.4. Here, Pulse-Amplitude-Modulated fluorometry (PAM) and Rapid Light Curves (RLCs) indicate that P. lutea exhibits a different trend of photosynthetic performances to cope with in situ light availability. Turbid waters of Pulau Kendi were observed to provide some protection from light-induced photoinhibition whereby the maximum photosynthetic yield (F v /F m = 0.8 ± 0.0) was significantly higher than those in Pulau Payar and Pulau Songsong. This observation suggested that they could survive near darkness with low light availability for photosynthesis, but a significant reduction in photosynthetic capacity (rETRmax = 77.5 ± 7.4) was also observed. In contrast, greater photosynthetic capacities were observed in P. lutea inhabiting the high-light environment of Pulau Payar. This study emphasized that P. lutea can photoacclimate by maximizing light availability for photosynthesis to ensure survival in turbid nearshore environments.

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居住在马来西亚马六甲海峡北部(NSoM)不同栖息地的黄斑鱼的原位光合性能

马来西亚马六甲海峡北部(NSoM)的珊瑚礁经常暴露在高浓度的总悬浮固体(TSS)中，从而降低了光合作用的光利用率。本研究描述了生活在NSoM的Kendi岛、Songsong岛和Payar岛的不同生境的Porites lutea的光合作用表现。各地点的光衰减(Kd (PAR))差异显著，其中深地岛高浑浊水域的Kd (PAR) (m−1)为0.8±0.0,TSS (mg/L)为95.7±2.5，与帕亚岛受保护的珊瑚礁相比，Kd (PAR) (m−1)为0.5±0.0,TSS (mg/L)为36.7±0.4。在这里，脉冲振幅调制荧光法(PAM)和快速光曲线(rlc)表明，黄叶杨的光合性能表现出不同的趋势，以应对原位光利用率。肯地岛混浊水体对光抑制有一定的保护作用，最大光合产量(F v /F m = 0.8±0.0)显著高于巴雅岛和松松岛。这表明它们可以在光照不足的黑暗环境下存活，但光合能力显著降低(rETRmax = 77.5±7.4)。相比之下，生活在帕亚尔岛强光环境中的叶黄花的光合能力更强。本研究强调，叶黄藻可以通过最大化光合作用的光利用率来适应光环境，以确保在浑浊的近岸环境中生存。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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).