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Biomass responses of widely and less‐widely naturalized alien plants to artificial light at night
Journal of Ecology ( IF 5.5 ) Pub Date : 2021-01-28 , DOI: 10.1111/1365-2745.13607
Benedikt Speißer 1 , Yanjie Liu 2 , Mark van Kleunen 1, 3
Affiliation  

  1. Artificial light at night has rapidly increased during the last century, and could potentially affect many ecological processes, from individuals via communities to entire ecosystems. Recent research has shown that artificial light at night may not only affect the behaviour of animals but also growth of plants and vegetation composition. However, it is not known yet whether artificial light at night may also affect other global change components such as plant invasions.
  2. Here, we tested how naturalized alien plants respond to artificial light at night, and particularly whether widely naturalized species differ from less‐widely naturalized species in their response to artificial light at night. We grew nine taxonomically related pairs of widely naturalized and less‐widely naturalized species alone and in competition, with native plants with and without artificial light at night.
  3. We found that in the competition treatment, artificial light at night significantly increased the total biomass production per pot, but not the biomass ratio between the naturalized alien plants and the native competitors. Interestingly, although the less‐widely naturalized species produced overall significantly less biomass than the widely naturalized species, there was a trend that the less‐widely naturalized species increased their biomass more strongly in response to artificial light at night than the widely naturalized species did (p = 0.07).
  4. Synthesis. Our study shows that although widely naturalized plants produce more biomass than less‐widely naturalized plants across different environmental conditions, they took less advantage of artificial light at night. This suggests that artificial light at night might lead to increased spread of currently less‐widely naturalized species, at least when artificial light at night continues to increase.


中文翻译:

在夜间广泛和较不自然归化的外来植物对人造光的生物量响应

  1. 在上个世纪中,夜间人造光迅速增加,并可能影响许多生态过程,从个人到社区再到整个生态系统。最近的研究表明,夜晚的人造光不仅可能影响动物的行为,而且还会影响植物的生长和植被组成。但是,目前尚不清楚晚上的人造光是否还会影响其他全球性变化因素,例如植物入侵。
  2. 在这里,我们测试了归化的外来植物如何在夜间对人造光做出反应,特别是广泛归化的物种在夜间对人造光的响应方面是否不同于未归一化的物种。我们单独和竞争地培育了九种与分类学相关的广泛归化和归化程度不高的物种,它们在夜间有或没有人造光的情况下都可以种植本地植物。
  3. 我们发现,在竞争处理中,夜间人工照明显着提高了每个花盆的总生物量产量,但没有增加自然化的外来植物与本地竞争者之间的生物量比率。有趣的是,尽管归化程度较低的物种总体上产生的生物量明显少于归化范围广泛的物种,但有一种趋势是,归化程度较弱的物种在夜间对人造光的响应比起归化程度较大的物种更加强烈地增加了其生物量(p  = 0.07)。
  4. 综合。我们的研究表明,尽管在不同的环境条件下,广泛归化的植物比不广泛归化的植物产生更多的生物量,但它们在夜间利用人造光的优势较少。这表明,至少当夜间的人工照明持续增加时,夜间的人工照明可能会导致当前归化程度较低的物种的传播增加。
更新日期:2021-04-08
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