Marine picophytoplankton is the most abundant photosynthetic group on Earth; however, it is still underrepresented in dynamic ecosystem models. Major constraints for understanding its role in the ecosystem at a global scale are sparse data and lack of a baseline description of its distribution. Here, we present three datasets to assess the global abundance of the principal groups of picophytoplankton, Prochlorococcus, Synechococcus, and picoeukaryotic phytoplankton: (1) a compilation of 109,045 field observations with ancillary environmental data, (2) a global monthly climatology of 1° grids from 0 to 200 m, and (3) four climate scenarios projections, from the Coupled Model Intercomparison Project 5, spanning years 1901 to 2100. Together this set of observational and modeled data can improve our understanding of the role of picophytoplankton in the global ecosystem.

中文翻译：

---

全球海洋中的原绿球藻、聚球藻和微核浮游植物丰度

海洋微型浮游植物是地球上最丰富的光合作用群体；然而，它在动态生态系统模型中的代表性仍然不足。在全球范围内理解其在生态系统中的作用的主要限制是数据稀少和缺乏对其分布的基线描述。在这里，我们提供了三个数据集来评估微型浮游植物、原绿球藻、聚球藻等主要群体的全球丰度和微核浮游植物：(1) 109,045 次现场观测和辅助环境数据的汇编，(2) 0 到 200 m 的 1° 网格的全球每月气候学，以及 (3) 四种气候情景预测，来自耦合模型比对项目 5，跨越 1901 年到 2100 年。这组观测和建模数据可以提高我们对微型浮游植物在全球生态系统中的作用的理解。