Light pollution from illuminated bridges as a potential barrier for migrating fish–Linking measurements with a proposal for a conceptual model

IF 3 2区 环境科学与生态学 Q2 ECOLOGY
Catherine Pérez Vega , Andreas Jechow , James A. Campbell , Karolina M. Zielinska-Dabkowska , Franz Hölker
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引用次数: 0

Abstract

Illuminated bridges have become important assets to navigable aquatic systems. However, if artificial light at night (ALAN) from illuminated bridges reaches aquatic habitats, such as rivers, it can threaten the river's natural heterogeneity and alter the behavioural responses of migratory fish. Here, via a pilot study, we quantified levels of ALAN at illuminated bridges that cross a river and, propose a conceptual model to estimate its potential implications on two migrating fish species with contrasting life histories. Night-time light measurements on the river Spree in Berlin were performed continuously along a transect and in detail at seven illuminated bridges. Photometric data of the pilot study showed rapidly increased and decreased light levels at several illuminated bridges from which we derived several model illumination scenarios. These illumination scenarios and their potential effect on migrating Atlantic salmon smolts (Salmo salar) and European silver eel (Anguilla anguilla) are presented as a conceptual model, considering illuminated bridges as behavioural barriers to fish migration. ALAN's adverse effects on freshwater habitats must be better researched, understood, managed, and properly communicated to develop future sustainable lighting practices and policies that preserve riverscapes and their biodiversity.

来自照明桥梁的光污染作为洄游鱼类的潜在障碍——连接测量与概念模型的建议
照明桥梁已成为通航水生系统的重要资产。然而,如果夜间来自照明桥梁的人造光到达水生栖息地,如河流,它可能会威胁河流的自然异质性,并改变洄游鱼类的行为反应。在这里,通过一项试点研究,我们量化了横跨河流的照明桥梁上的ALAN水平,并提出了一个概念模型,以估计其对两种具有不同生活史的迁徙鱼类的潜在影响。对柏林施普雷河的夜间灯光进行了连续的测量,并在七座照明的桥梁上进行了详细的测量。试点研究的光度数据显示,在几个被照明的桥梁上,光照水平迅速增加和减少,我们从中得出了几个模型照明场景。这些照明场景及其对洄游大西洋鲑鱼幼鱼(Salmo salar)和欧洲银鳗(Anguilla Anguilla)的潜在影响作为一个概念模型提出,考虑到照明桥梁是鱼类洄游的行为障碍。ALAN对淡水栖息地的不利影响必须更好地研究、理解、管理和适当地沟通,以制定未来可持续的照明实践和政策,保护河流景观及其生物多样性。
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来源期刊
Basic and Applied Ecology
Basic and Applied Ecology 环境科学-生态学
CiteScore
6.90
自引率
5.30%
发文量
103
审稿时长
10.6 weeks
期刊介绍: Basic and Applied Ecology provides a forum in which significant advances and ideas can be rapidly communicated to a wide audience. Basic and Applied Ecology publishes original contributions, perspectives and reviews from all areas of basic and applied ecology. Ecologists from all countries are invited to publish ecological research of international interest in its pages. There is no bias with regard to taxon or geographical area.
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