Data from: A compendium of geochemical information from the Saanich Inlet water column

Marine oxygen minimum zones (OMZs) are widespread and naturally occurring water column features that constitute ~7% of global ocean volume, but contribute disproportionately to biogeochemical cycling of carbon, nitrogen and climate active trace gases such as nitrous oxide and methane. Climate change compounded by other human activities is causing OMZ expansion. While microbial communities are the primary engines driving biogeochemical cycles in OMZs, our current understanding of microbial community metabolism is hindered by a lack of time-series observations charting responses to changing water column oxygen-deficiency. Saanich Inlet, a seasonally anoxic fjord on the coast of Vancouver Island British Columbia is a model ecosystem for monitoring microbial community structure, function and dynamics in relation to changing levels of water column oxygen-deficiency extensible to coastal and open ocean OMZs. Here, we present nine years of monthly time series observations in Saanich Inlet encompassing water column chemistry and environmental sequence information. This compendium provides a unique ecological and biogeochemical framework for comparative community analysis and modelling efforts in OMZs throughout the global ocean.海洋氧最低区（OMZs）是广泛分布的天然水柱特征，约占全球海洋总体积的7%，却在碳、氮及氧化亚氮、甲烷等气候活性痕量气体的生物地球化学循环中贡献远超其体积占比。气候变化叠加其他人类活动正导致OMZs扩张。尽管微生物群落是驱动OMZs内生物地球化学循环的核心驱动力，但目前我们对微生物群落代谢过程的认知，因缺乏可记录水柱缺氧程度变化响应的时间序列观测数据而受到限制。萨尼奇湾（Saanich Inlet）是位于加拿大不列颠哥伦比亚省温哥华岛沿岸的季节性缺氧峡湾，是监测微生物群落结构、功能及动态与水柱缺氧程度变化相关性的模式生态系统，其研究结果可推广至沿岸及开阔大洋的OMZs。本数据集涵盖了萨尼奇湾长达9年的月度时间序列观测数据，包含水柱化学组分与环境序列信息。本汇编为全球范围内OMZs的群落比较分析及建模研究提供了独特的生态与生物地球化学研究框架。