European Commission, Joint Research Centre (JRC), Ispra, Italy.
Plymouth Marine Laboratory, Plymouth, United Kingdom.
PLoS One. 2021 Mar 3;16(3):e0242637. doi: 10.1371/journal.pone.0242637. eCollection 2021.
In this study, the effects of sea ice and wind speed on the timing and composition of phytoplankton spring bloom in the central and southern Baltic Sea are investigated by a hydrodynamic-biogeochemical model and observational data. The modelling experiment compared the results of a reference run in the presence of sea ice with those of a run in the absence of sea ice, which confirmed that ecological conditions differed significantly for both the scenarios. It has been found that diatoms dominate the phytoplankton biomass in the absence of sea ice, whereas dinoflagellates dominate the biomass in the presence of thin sea ice. The study concludes that under moderate ice conditions (representing the last few decades), dinoflagellates dominate the spring bloom phytoplankton biomass in the Baltic Sea, whereas diatoms will be dominant in the future as a result of climate change i.e. in the absence of sea ice.
本研究通过水动力-生物地球化学模型和观测数据，调查了海冰和风速对波罗的海中部和南部浮游植物春季水华时间和组成的影响。模拟实验将存在海冰的参考运行结果与不存在海冰的运行结果进行了比较，证实了这两种情况下的生态条件有显著差异。结果发现，在不存在海冰的情况下，硅藻是浮游植物生物量的主要组成部分，而在薄海冰存在的情况下，甲藻是生物量的主要组成部分。研究得出结论，在中等冰况下（代表过去几十年），甲藻将在波罗的海中主导春季水华浮游植物生物量，而由于气候变化，即没有海冰，硅藻将在未来成为主导。
