Effects of cyanobacterial growth and decline on the phoD-harboring bacterial community structure in sediments of Lake Chaohu

被引：0
|
作者：
Sun T. [1 ]
Huang T. [1 ]
Liu Y. [1 ]
Sun Q. [1 ]
机构：
[1] Anhui Province Key Laboratory of Wetland Ecosystem Protection and Restoration, School of Resources and Environment Engineering, Anhui University, Hefei
来源：
Hupo Kexue/Journal of Lake Sciences | 2022年 / 34卷 / 06期
关键词：
alkaline phosphatase; cyanobacterial blooms; Lake Chaohu; mineralization of organic phosphorus; phoD; physicochemical factors; sediment;
D O I：
10.18307/2022.0606
中图分类号：
学科分类号：
摘要：
The alkaline phosphatase encoded by phoD gene drives the mineralization of organic phosphorus in sediments and thus the release of bioavailable phosphorus, and promotes the growth and blooms of cyanobacteria in eutrophic lakes. The dynamic variations of phoD-harboring bacterial community during the annual cyanobacterial growth and decline in eutrophic lakes, however, remain unclear. In this study, we analyzed the alkaline phosphatase activity (APA), phoD-harboring bacterial community diversity and structure and their associations with the physicochemical factors in a typical eutrophic lake (Lake Chaohu) in China during the entire cyanobacterial growth and decline. The results showed that the APA in sediments increased significantly during the initial growth and outbreaks of cyanobacteria. Pseudonocardia and Friedmanniella are the predominant phoD-harboring genera in sediments during the entire cyanobacterial growth and decline. In contrast to the abundance of Pseudonocardia and Friedmanniella in the incubation and decline stages of cyanobacteria, Pseudonocardia decreased significantly while Friedmanniella increased significantly in the early growth and outbreak stages. The abundance of phoD gene bacteria varies spatiotemporally, especially for its high spatial heterogeneity. The Ace and Shannon diversity index of phoD-harboring bacterial community during the early and outbreak stages of cyanobacteria were much higher than those in the incubation and decline stages. The changes of phoD-harboring bacterial community were mainly driven by APA, dissolved oxygen, chlorophyll-a, water temperature, total phosphorus and inorganic phosphorus. The rapid decline of dissolved inorganic phosphorus in overlying waters due to the increasing cyanobacterial photosynthesis in the early growth of cyanobacteria induces the APA, promotes the growth of Friedmanniella and alleviates the phosphorus restriction. © 2022 Science Press. All rights reserved.
引用
收藏
页码：1854 / 1865
页数：11
相关论文
共 59 条
  • [1] Paerl HW, Xu H, McCarthy MJ, Et al., Controlling harmful cyanobacterial blooms in a hyper-eutrophic lake (Lake Taihu, China):The need for a dual nutrient (N & P) management strategy, Water Research, 45, 5, pp. 1973-1983, (2011)
  • [2] Han LF, Gao B, Hao H, Et al., Lead contamination in sediments in the past 20-years:A challenge for China, Science of the Total Environment, 640, 641, pp. 746-756, (2018)
  • [3] Yuan HZ, Wang HX, Zhou YW, Et al., Water-level fluctuations regulate the availability and diffusion kinetics process of phosphorus at lake water-sediment interface, Water Research, 200, (2021)
  • [4] Paytan A, Roberts K, Watson S, Et al., Internal loading of phosphate in Lake Erie Central Basin, Science of the Total Environment, 579, pp. 1356-1365, (2017)
  • [5] Yao L., Research progress of phosphorus geochemical cycle in shallow lakes, Guangdong Chemical Industry, 47, 9, pp. 112-113, (2020)
  • [6] Bostrom B, Andersen JM, Fleischer S, Et al., Exchange of phosphorus across the sediment-water interface, Hydrobiologia, 170, 1, pp. 229-244, (1988)
  • [7] Yang CH, Yang P, Geng J, Et al., Sediment internal nutrient loading in the most polluted area of a shallow eutrophic lake (Lake Chaohu, China) and its contribution to lake eutrophication, Environmental Pollution, 262, (2020)
  • [8] Chen MS, Ding SM, Chen X, Et al., Mechanisms driving phosphorus release during algal blooms based on hourly changes in iron and phosphorus concentrations in sediments, Water Research, 133, pp. 153-164, (2018)
  • [9] Yuan HZ, Tai ZQ, Li Q, Et al., Characterization and source identification of organic phosphorus in sediments of a hypereutrophic lake, Environmental Pollution, 257, (2020)
  • [10] Suzumura M, Hashihama F, Yamada N, Et al., Dissolved phosphorus pools and alkaline phosphatase activity in the euphotic zone of the Western north Pacific Ocean, Frontiers in Microbiology, 3, (2012)
123456