As an indispensable part of the marine ecosystem, phytoplankton are important prey for zooplankton and various marine animals with important commercial value. The influence of seawater warming and eutrophication on phytoplankton communities is well known, but few studies have explained the effects of the interaction between temperature and nutrients on marine phytoplankton. Through meta-analysis and meta-regression, the phytoplankton responses to the effects of nutrient addition and seawater warming were evaluated in this study. Nitrogen (N) addition led to an increase in phytoplankton biomass, while phosphorus (P) had no significant effect on phytoplankton biomass. However, this result may be biased by the uneven distribution of the research area. N limitation is widespread in the areas where these collected studies were conducted, including many parts of North and South Atlantic and West Pacific Oceans. The key limiting nutrient in other areas lacking corresponding experiments, however, remain unclear. The effect of seawater warming was not significant, which indicates the uncertainty about the effect of temperature on phytoplankton. The results of ANOVA show that nutrient addition and seawater warming had similar effects in various marine habitats (coastal regions, estuaries and open seas), while salinity could have caused the difference in the N effects among the three habitats. Furthermore, our results showed that the impact of temperature depends on nutrient conditions, especially N status, which has rarely been considered before. This result demonstrated the importance of evaluating nutrient limitation patterns when studying climate warming. The impact of rising temperatures may need to be reevaluated because N limitation is common.

作为海洋生态系统不可缺少的一部分，浮游植物是浮游动物和各种具有重要商业价值的海洋动物的重要猎物。海水变暖和富营养化对浮游植物群落的影响是众所周知的，但是很少有研究解释温度和养分之间的相互作用对海洋浮游植物的影响。通过荟萃分析和荟萃回归，本研究评估了浮游植物对营养物添加和海水变暖的响应。氮（N）的添加导致浮游植物生物量的增加，而磷（P）对浮游生物的生物量没有显着影响。但是，该结果可能会因研究区域分布不均而产生偏差。在进行这些收集的研究的地区，N限制普遍存在，包括北大西洋和南大西洋以及西太平洋的许多地区。然而，其他地区缺乏相应的实验来限制营养的关键仍然不清楚。海水变暖的影响并不显着，这表明温度对浮游植物的影响尚不确定。方差分析的结果表明，营养添加和海水变暖在各种海洋生境（沿海地区，河口和公海）中具有相似的作用，而盐分可能导致这三种生境之间的氮效应不同。此外，我们的结果表明温度的影响取决于养分状况，尤其是氮的状况，这在以前很少被考虑。该结果证明了在研究气候变暖时评估养分限制模式的重要性。