Artificial light pollution and climate change are two important threats to the coastal ecosystems worldwide. However, the potential interaction of artificial light and extreme warming on coastal species is unknown. To address this issue, we exposed a tropical copepod Pseudodiaptomus incisus to one of twelve combinations of four photoperiods (0L:24D, 12L:12D, 18L:6D and 24L:0D – light: dark cycle) and three temperatures (26, 30 and 34 °C). We quantified five key productivity parameters, including development time, body size of all 12 development stages, clutch size, hatching success and nauplii production. P. incisus had a larger body size and clutch size and higher nauplii production at the photoperiod of 12L:12D and 18L:6D than in continuous lighting condition (24L:0D). Copepods developed faster but showed smaller body size, clutch size, hatching success and nauplii production at 34 °C than at 30 and 26 °C. Importantly, continuous lighting resulted in stronger reductions in body size, clutch size, hatching success and nauplii production at 34 °C. Our results suggest that continuous lighting may increase the vulnerability of coastal zooplankton to climate change with ecological consequences.

人工光污染和气候变化是全球沿海生态系统的两个重要威胁。但是，人造光和极端变暖对沿海物种的潜在相互作用尚不清楚。为了解决这个问题，我们将热带co足类假牙实线切牙暴露于四个光周期（0L：24D，12L：12D，18L：6D和24L：0D –光照：黑暗周期）的十二种组合之一和三种温度（26、30和34°C）。我们量化了五个关键的生产力参数，包括开发时间，所有12个开发阶段的机体尺寸，离合器尺寸，孵化成功率和幼体产量。切菜与连续照明条件（24L：0D）相比，在12L：12D和18L：6D的光周期下，它具有更大的车身尺寸和离合器尺寸，以及更高的无节幼体产量。pe足类在34°C时比30和26°C时发育更快，但体型较小，离合大小，孵化成功率和幼体产量较小。重要的是，连续照明导致在34°C时身体尺寸，离合器尺寸，孵化成功率和无节幼体产量的减小。我们的结果表明，持续照明可能会增加沿海浮游生物对气候变化的脆弱性，并带来生态后果。