Effects of Light Pollution on the Early Life Stages of the Most Abundant Northern Red Sea Coral
Effects of Light Pollution on the Early Life Stages of the Most Abundant Northern Red Sea Coral
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DOI：
10.3390/microorganisms8020193
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发表时间：
2020-01
期刊：
影响因子：
4.5
通讯作者：
R. Tamir;G. Eyal;I. Cohen;Y. Loya
中科院分区：
文献类型：
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作者：
R. Tamir;G. Eyal;I. Cohen;Y. Loya
人口沿着沿海地区的增长使海洋环境暴露于越来越多的人为光源。尽管这种现代现象的潜在影响，很少有研究探讨其对珊瑚的影响。在这里，我们提出了一个长期的研究珊瑚的早期生命阶段在夜间光污染条件下。从柱珊瑚（Stylophora pistillata）群体中采集珊瑚幼虫，在两种常见的城市照明方式（荧光灯或LED）下进行实验。人工照明的珊瑚定居成功，生存，生长速度，光合效率和钙化率的影响进行了为期一年的研究。与两种光处理相比，对照组的沉降成功率高出约30%，而在光处理下，珊瑚显示出更高的存活率、生长率和钙化率。此外，在光污染的珊瑚中发现光合系统受损的迹象，这反映在它们的光合效率参数中：最大光能利用系数（α）、最大潜在光合速率（Pmax）和最大光合量子效率（Fv/Fm）较低。我们的研究结果为人工照明方法对珊瑚礁自然环境的潜在不利影响提供了证据。我们的结论是，使用LED照明的方法有很高的干扰潜力的早期生命阶段的珊瑚。
The growth in human population along coastal areas is exposing marine environments to increasing anthropogenic light sources. Despite the potential effects of this modern phenomenon, very few studies have examined its implications for corals. Here, we present a long-term study of coral early life stages under light pollution conditions at night. Coral larvae were collected from Stylophora pistillata colonies, and then settled and grown under experimental conditions of two different common city lighting methods (fluorescent or LED). Effects of the artificial lighting on the coral settlement success, survivorship, growth rate, photosynthetic efficiency, and calcification rate were examined over a period of one year. The control exhibited ~30% higher settlement success compared to the two light treatments, while under the light treatments corals showed higher survivorship, growth, and calcification rates. In addition, an indication of damage to the photosynthetic system was found in the light-polluted corals, which was reflected in their photosynthesis efficiency parameters: i.e., lower maximum light utilization coefficient (α), lower maximum potential photosynthetic rate (Pmax), and lower photosynthetic maximal quantum yield (Fv/Fm). Our findings provide evidence of the potential adverse effects of artificial lighting methods on the natural environment of coral reefs. We conclude that the use of the LED lighting method has high interference potential for the early life stages of corals.