Department of Biology Education, Seoul National University, Seoul, 08826, Republic of Korea.
Center for Education Research, Seoul National University, Seoul, 08826, Republic of Korea.
Sci Rep. 2020 Oct 15;10(1):17494. doi: 10.1038/s41598-020-74566-z.
Vernal herbs are exposed to the risk of climate change under spring frost and canopy closure. Although vernal herbs contribute to the biodiversity of the understorey layer in temperate forests, few studies assessed the effect of climate change on the phenology of the herbs. To examine phenological shifts in flowering seasons of vernal herb species caused by climate change, a greenhouse experiment was conducted using four species (Adonis amurensis, Hepatica nobilis var. japonica, Viola phalacrocarpa, and Pulsatilla cernua) under two temperature conditions (ambient or elevated temperature) and two precipitation conditions (convective or reduced precipitation). Experimental warming advanced overall aspects of the flowering timing including the first and last day of flowering. The growth of flowering stalk was also promoted by elevated temperature. Effects of decreased precipitation varied among species, which advanced the last day of the flowering of the later flowering species. Consequently, a decrease in overall flowering period length was observed. These results indicate that overall, climate change results in a shortening of the flowering season of vernal herb species, specifically at a higher temperature and under conditions of less precipitation.
春花受春霜和郁闭树冠的影响，面临气候变化的风险。尽管春花为温带森林的林下层生物多样性做出贡献，但很少有研究评估气候变化对草本植物物候的影响。为了研究气候变化引起的春花物种花期物候变化，在温室实验中，使用四种物种（东北延胡索、日本延胡索、紫堇、白头翁）在两种温度条件（环境或升高温度）和两种降水条件（对流或减少降水）下进行实验。实验增温提前了整体开花时间，包括开花的第一天和最后一天。高温也促进了开花茎的生长。降水减少的影响因物种而异，这会提前晚开花物种的最后一天开花。因此，观察到整体开花期长度缩短。这些结果表明，总的来说，气候变化导致春花物种的花期缩短，特别是在较高温度和降水较少的情况下。
