海港城市绚烂耀目的灯光可以改变港口局域海洋生态结构，引诱喜光的船体附生甲壳类物种；而那些厌光的物种，则避光而远遁。

科学家们估计现今全球有四分之一的海岸带或为港口，或为码头，或为油井，或为渔场，不同程度存在着人工光源照射引起的光污染问题。很多海洋非脊椎动物在幼虫阶段，通过光定位找到最适合未来成体时适宜生存的居所。

科学家们将木筏放置在位于英国威尔士西北与安格尔西岛之间麦奈海峡，让其暴露在不同的光照条件下，开展了这项研究。他们发现包括Plumularia setacea等一些厌光的物种很少能在光照强的木筏上找到。而另外一些船舶运输业人士极讨厌的船体附生甲壳类物种，却因喜光而被吸引来。这类粘附在船体上的软体动物能加大行船阻力，需要定期清理才能保证船体速度。

该文章发表在Royal Society journal Biology Letter上。

Night-time lighting alters the composition of marine epifaunal communities

Abstract

Marine benthic communities face multiple anthropogenic pressures that compromise the future of some of the most biodiverse and functionally important ecosystems in the world. Yet one of the pressures these ecosystems face, night-time lighting, remains unstudied. Light is an important cue in guiding the settlement of invertebrate larvae, and altering natural regimes of nocturnal illumination could modify patterns of recruitment among sessile epifauna. We present the first evidence of night-time lighting changing the composition of temperate epifaunal marine invertebrate communities. Illuminating settlement surfaces with white light-emitting diode lighting at night, to levels experienced by these communities locally, both inhibited and encouraged the colonization of 39% of the taxa analysed, including three sessile and two mobile species. Our results indicate that ecological light pollution from coastal development, shipping and offshore infrastructure could be changing the composition of marine epifaunal communities.

群晓科苑

http://blog.sina.com.cn/s/blog_7038ff370102vga6.html