Phototaxis and polarotaxis hand in hand: night dispersal flight of aquatic insects distracted synergistically by light intensity and reflection polarization
Phototaxis and polarotaxis hand in hand: night dispersal flight of aquatic insects distracted synergistically by light intensity and reflection polarization
复制标题
DOI：
10.1007/s00114-014-1166-2
复制
发表时间：
2014-05-01
影响因子：
--
通讯作者：
Csabai, Zoltan
中科院分区：
文献类型：
--
作者：
Boda, Pal;Horvath, Gabor;Csabai, Zoltan
基于早期的野外观察，我们假设光强和水平偏振反射光可能强烈影响夜间活动水生昆虫的飞行行为。我们假设趋光性和趋光性合在一起对这些昆虫的扩散飞行的影响比它们单独产生的影响更有害。我们用铺设在地面上的水平测试面进行了多项选择的现场实验，以验证这一假设。我们同时为空中水生昆虫提供了以下视觉刺激：(1)单独诱导趋光性的灯光哑光黑色帆布，(2)单独诱导偏光性的亮黑色塑料片，(3)同时诱导趋光性和偏光性的灯光亮黑色塑料片，以及(4)作为视觉上不吸引人的不亮黑色哑光帆布。未亮的哑光黑色帆布只捕获了微不足道的13只水虫。在亮灯的哑光黑色帆布（7,922只）和未亮灯的闪亮黑色塑料布（8,510只）上捕获的水甲虫和臭虫总数（16,432只）远低于亮灯的闪亮黑色塑料布捕获的总数量（29,682只）。这为所研究的水生昆虫的趋光性（由非偏振光直射引起）和偏光性（由强偏振和水平偏振的塑料反射光引起）的协同相互作用提供了实验证据。因此，水平偏振的人造灯表面可以作为一个有效的生态陷阱，因为这种光学线索的协同作用，特别是在城市环境中。
Based on an earlier observation in the field, we hypothesized that light intensity and horizontally polarized reflected light may strongly influence the flight behaviour of night-active aquatic insects. We assumed that phototaxis and polarotaxis together have a more harmful effect on the dispersal flight of these insects than they would have separately. We tested this hypothesis in a multiple-choice field experiment using horizontal test surfaces laid on the ground. We offered simultaneously the following visual stimuli for aerial aquatic insects: (1) lamplit matte black canvas inducing phototaxis alone, (2) unlit shiny black plastic sheet eliciting polarotaxis alone, (3) lamplit shiny black plastic sheet inducing simultaneously phototaxis and polarotaxis, and (4) unlit matte black canvas as a visually unattractive control. The unlit matte black canvas trapped only a negligible number (13) of water insects. The sum (16,432) of the total numbers of water beetles and bugs captured on the lamplit matte black canvas (7,922) and the unlit shiny black plastic sheet (8,510) was much smaller than the total catch (29,682) caught on the lamplit shiny black plastic sheet. This provides experimental evidence for the synergistic interaction of phototaxis (elicited by the unpolarized direct lamplight) and polarotaxis (induced by the strongly and horizontally polarized plastic-reflected light) in the investigated aquatic insects. Thus, horizontally polarizing artificial lamplit surfaces can function as an effective ecological trap due to this synergism of optical cues, especially in the urban environment.