Introduction

细菌残体是细菌死亡后释放的细胞物质，含有丰富的营养成分，如氨基糖、脂质、蛋白质、多糖和核酸等。由于其低C/N比和高含量的有机氮、磷，细菌残体被视为细菌的高质量营养底物。在贫营养的自然环境中，细菌残体循环可能为细菌提供额外的资源生态位，但其对细菌多样性维持的潜在影响尚未被系统研究。根据生态位理论，物种共存的数量受限于限制性资源的数量。细菌残体循环可能通过资源分配机制促进多样性维持，但其前提条件包括：（1）不同细菌物种产生化学组成独特的残体；（2）细菌在利用不同残体时表现出差 …

I first encountered TMLE—sometimes spelled out as targeted maximum likelihood estimation or targeted minimum-loss estimate—about twelve or so years ago when Mark var der Laan, one of the original developers who literally wrote the book, gave a talk …

Palaeoverse, a grassroots organization that develops R packages for paleontology, has been awarded a Large Grant from the Software Sustainability Institute, via the Research Software Maintenance Fund, for the project ‘Converting Users to Contrib…