Size distributions of bacteria in lakes : data analysis and the adaptive dynamics

本文对琵琶湖6个细菌类群的概率密度函数（PDF）进行了估算。从PDF中获得汇总统计数据，并分析与环境变量的关系。从数据中，我没有发现6个分类群的细胞体积有显著差异。另一方面，随着温度的升高，细胞体积明显减小。在水生生态系统中，细菌的细胞大小是控制细菌功能的重要性状。这些结果有助于促进我们对细菌群落和对全球气候变化的响应的理解。

In this study, I estimated the probability density function(PDF) of six taxonomic groups of bacteria in Lake Biwa. Summary statistics were obtained from the PDF, and the relationships with environmental variables were analyzed. From the data, I could not detect significant differences among cell volumes of the six taxonomic groups. On the other hand, cell volumes decreased significantly with increasing temperature. Cell size of bacteria is an important trait that controls function of bacteria in aquatic ecosystems. These results contribute to promote our understanding of bacterial community and the responses to global climate change.