Environmental triggers of a Microcystis (Cyanophyceae) bloom in an artificial lagoon of Hangzhou Bay, China. (October 2018)

• Record Type: Journal Article
• Authors: Tang, Chunyu; Sun, Bin; Yu, Kefeng; Shi, Jinting; Liu, Mengmeng; Jiang, Ting; Huo, Yuanzi; He, Peimin
• Is Part Of: Marine pollution bulletin. Volume 135(2018)
• Page Start: 776
• Page End: 782
• Publication Date: 2018-10
• Subjects: Estuary -- Lagoon -- Microcystis -- Cyanobacterial blooms -- Harmful algae blooms -- Eutrophication; Marine pollution -- Periodicals; Marine Biology -- Periodicals; Water Pollution -- Periodicals; Mer -- Pollution -- Périodiques; Publications périodiques; Pollution des mers; Lutte antipollution; Electronic journals; 363.7394
• DOI: 10.1016/j.marpolbul.2018.08.005
• Languages: English
• ISSNs: 0025-326X

Abstract

Abstract: The relationship between Microcystis abundance and environmental variables was studied during a Microcystis bloom in the summer months of 2016 in an artificial lagoon of Hangzhou Bay, China. It was determined that Microcystis abundance increased from 0.16 × 10 4 cell/L to 5.8 × 10 7 cell/L within 17 days from 28 July to 14 August, contributing to 96.84–99.56% of the total phytoplankton abundance. Then, Microcystis gradually disappeared 57 days afterwards. The results showed that the growth of Microcystis, including the stage of recovery, outbreak, subsidence and disappearance, was significantly correlated with water temperature, salinity, soluble reactive phosphorus (PO4 -P), dissolved inorganic nutrients (DIN), silicate (SiO4 -Si), the ratio of DIN/SiO4 -Si and zooplankton abundance, and the key environmental triggers which promoted the outbreak of Microcystis were water temperature, PO4 -P concentration and zooplankton abundance in this artificial lagoon. Highlights: A Microcystis bloom occurred in an artificial lagoon with salinity 8–9. Maximum abundance of Microcystis was up to 5.8×10 7 cell/L. Water temperature, PO4 -P and zooplankton were important factors promoting the Microcystis bloom in this lagoon.