Microcystin as a biogeochemical cycle: Pools, fluxes, and fates of the cyanotoxin in inland waters
Microcystin as a biogeochemical cycle: Pools, fluxes, and fates of the cyanotoxin in inland waters
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DOI：
10.1002/lol2.10300
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发表时间：
2022-12
影响因子：
7.8
通讯作者：
Quin K. Shingai;G. Wilkinson
中科院分区：
文献类型：
--
作者：
Quin K. Shingai;G. Wilkinson
微囊藻毒素对水生生态系统和人类健康构成严重威胁。目前迫切需要了解湖泊中微囊藻毒素的产生、运动和储存。通过综合文献，我们构建了微囊藻毒素的概念生物地球化学模型，确定了湖泊中与陆地环境相连的四个主要池和九个主要通量。该概念模型可作为开发微囊藻毒素生态系统质量平衡的框架。我们认为，水柱中微囊藻毒素的浓度是进口、沉积物转运、生产和降解、吸收、埋藏和出口之间的平衡。然而，关于微囊藻毒素的大小和运动仍然存在大量的未知因素。未来的研究应集中在沉积物通量、生物降解驱动因素和季节动态上。采用“微囊藻毒素循环”框架可以提高我们对推动毒素流行的过程的理解，并有助于确定最小化暴露风险的优先战略。
Microcystin poses a serious threat to aquatic ecosystems and human health. There is a pressing need to understand the production, movement, and storage of microcystin in lakes. We constructed a conceptual biogeochemical model for microcystin through a comprehensive literature synthesis, identifying four major pools and nine major fluxes in lakes that also connect to the terrestrial environment. This conceptual model can be used as the framework for developing ecosystem mass balances of microcystin. We propose that the concentration of microcystin in the water column is the balance between the import, sediment translocation, production and degradation, uptake, burial, and export. However, substantial unknowns remain pertaining to the magnitude and movement of microcystin. Future investigations should focus on sediment fluxes, drivers of biodegradation, and seasonal dynamics. Adopting the framework of a “microcystin cycle” improves our understanding of processes driving toxin prevalence and helps to prioritize strategies for minimizing exposure risks.