Microcosm experiment on Ocean Alkalinity Enhancement 2023

To understand the environmental impacts of added alkaline minerals on plankton communities, we enclosed natural coastal plankton communities using 53L microcosms and exposed these communities to ground factory slag (2g/53L) and olivine (100g/53L). The microcosms of seawater were kept at 13.5 °C with circulations. The biochemical changes and responses in microcosms were monitored and measured for 21 days. The measured parameters are pH, total alkalinity, temperature, macro-nutrients concentrations, total chlorophyll-a, flow cytometry data, POC/PON, BSi, Rapid Light Curves, zooplankton abundance, the dissolved trace metal concentrations, and the particulate trace metal concentrations.

本研究旨在探究添加碱性矿物对沿海浮游生物群落的环境影响，采用53升微宇宙（microcosms）封装天然沿海浮游生物群落，并将其分别暴露于磨碎的工厂矿渣（2g/53L）与橄榄石（100g/53L）环境中。该海水微宇宙体系维持于13.5℃并保持水体循环。本研究对微宇宙内的生化变化与响应展开了为期21天的监测与测定，所测定的参数包括：pH值、总碱度、温度、宏量营养素浓度、总叶绿素a、流式细胞术（flow cytometry）数据、颗粒有机碳/颗粒有机氮（POC/PON）、生物源二氧化硅（BSi）、快速光曲线、浮游动物丰度、溶解态痕量金属浓度以及颗粒态痕量金属浓度。