Artificial light at night (ALAN) alters the physiology and biochemistry of symbiotic reef building corals
Artificial light at night (ALAN) alters the physiology and biochemistry of symbiotic reef building corals
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DOI：
10.1016/j.envpol.2020.114987
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发表时间：
2020-11-01
影响因子：
8.9
通讯作者：
Ferrier-Pages, Christine
中科院分区：
文献类型：
--
作者：
Levy, Oren;Marangoni, Laura Fernandes de Barros;Ferrier-Pages, Christine
夜间人造光（ALAN）是人为光源改变自然光水平的结果，已被公认为是改变海洋生态系统功能的重要因素。使用LED光模拟ALAN，我们研究了对来自红海的两种石珊瑚物种的生理（共生体和叶绿素含量，光合作用，呼吸作用，色素分布，骨骼生长和氧化应激反应）的影响。ALAN诱导的共生体光合作用的光抑制，以及过度生产的活性氧（ROS）和增加的氧化损伤的脂质在两种珊瑚物种。ALAN对共生协会和珊瑚生理学的有害影响的程度与珊瑚所经历的氧化应激条件的严重程度一致。珊瑚物种Sylophora pistillata，经历了更严重的氧化应激条件比其他物种测试，Turbinaria reniformis，也表现出更明显的漂白（共生体和叶绿素含量的损失），增强光抑制和光合速率下降。本研究的结果进一步加深了我们对ALAN对石珊瑚有害影响的生化机制的了解，最终揭示了ALAN对珊瑚礁生态的新威胁。此外，考虑到全球变暖和光污染将在未来几十年内增加，未来的研究应采取阐明ALAN和全球气候变化压力源的潜在协同效应。(C)2020爱思唯尔有限公司保留所有权利。
Artificial Light at Night (ALAN), which is the alteration of natural light levels as the result of anthropogenic light sources, has been acknowledged as an important factor that alters the functioning of marine ecosystems. Using LEDs light to mimic ALAN, we studied the effect on the physiology (symbiont and chlorophyll contents, photosynthesis, respiration, pigment profile, skeletal growth, and oxidative stress responses) of two scleractinian coral species originating from the Red Sea. ALAN induced the photo inhibition of symbiont photosynthesis, as well as an overproduction of reactive oxygen species (ROS) and an increase in oxidative damage to lipids in both coral species. The extent of the deleterious effects of ALAN on the symbiotic association and coral physiology was aligned with the severity of the oxidative stress condition experienced by the corals. The coral species Sylophora pistillata, which experienced a more severe oxidative stress condition than the other species tested, Turbinaria reniformis, also showed a more pronounced bleaching (loss of symbionts and chlorophyll content), enhanced photoinhibition and decreased photosynthetic rates. Findings of the present study further our knowledge on the biochemical mechanisms underpinning the deleterious impacts of ALAN on scleractinian corals, ultimately shedding light on the emerging threat of ALAN on coral reef ecology. Further, considering that global warming and light pollution will increase in the next few decades, future studies should be taken to elucidate the potential synergetic effects of ALAN and global climate change stressors. (C) 2020 Elsevier Ltd. All rights reserved.