Phenotype changes of cyanobacterial and microbial distribution characteristics of surface sediments in different periods of cyanobacterial blooms in Taihu Lake

Zhang, Weizhen; Gu, Ping; Zhu, Wenjie; Wang, Ning; Jiang, Mengqi; He, Jianguo; Zhang, Zheng

doi:10.1007/s10452-020-09761-1

Cited by 9 publications

(7 citation statements)

References 69 publications

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“…Low abundances of Firmicutes in all mesocosms (< 0.1%) could be due to aerobic conditions and low cyanobacterial abundances (Fig. 4 A), as this family exhibits a significant advantage during the anaerobic decomposition of cyanobacteria blooms 60 . Other phyla occurred in low relative abundances (< 3.0%) probably due to a combination of physical, biological and chemical factors 61 .…”

Section: Discussionmentioning

confidence: 99%

The combined impact of low temperatures and shifting phosphorus availability on the competitive ability of cyanobacteria

Briddon

Szekeres

Hegedüs

et al. 2022

Sci Rep

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In freshwater systems, cyanobacteria are strong competitors under enhanced temperature and eutrophic conditions. Understanding their adaptive and evolutionary potential to multiple environmental states allows us to accurately predict their response to future conditions. To better understand if the combined impacts of temperature and nutrient limitation could suppress the cyanobacterial blooms, a single strain of Microcystis aeruginosa was inoculated into natural phytoplankton communities with different nutrient conditions: oligotrophic, eutrophic and eutrophic with the addition of bentophos. We found that the use of the bentophos treatment causes significant differences in prokaryotic and eukaryotic communities. This resulted in reduced biodiversity among the eukaryotes and a decline in cyanobacterial abundance suggesting phosphorus limitation had a strong impact on the community structure. The low temperature during the experiment lead to the disappearance of M. aeruginosa in all treatments and gave other phytoplankton groups a competitive advantage leading to the dominance of the eukaryotic families that have diverse morphologies and nutritional modes. These results show cyanobacteria have a reduced competitive advantage under certain temperature and nutrient limiting conditions and therefore, controlling phosphorus concentrations could be a possible mitigation strategy for managing harmful cyanobacterial blooms in a future warmer climate.

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Section: Discussionmentioning

confidence: 99%

The combined impact of low temperatures and shifting phosphorus availability on the competitive ability of cyanobacteria

Briddon

Szekeres

Hegedüs

et al. 2022

Sci Rep

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“…Therefore Zhushan Bay had the worst water quality and the most serious eutrophication in Taihu Lake,which was closely related to the water diversion. If the YRD continues to increase, the pollution flux into Zhushan Bay will be greatly increased, bringing a huge risk of eutrophication to the lake area or even a wider area (Wu et al 2019;Zhang et al 2020).…”

Section: Different Spatial Positionsmentioning

confidence: 99%

Study on the proportion and flow path of Yangtze River water diversion into Taihu Lake

Pang

et al. 2021

Water Supply

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The purpose of this study is to quantify the proportion and flow path of the water diversion from Yangtze River (YRD) into Taihu Lake. Based on the analysis of rainfall and data of Taihu basin in recent 30 years, a 1-D hydrodynamic model of main inflow river network area of Taihu basin was constructed, coupled the convection-diffusion model with conservative material, the characteristics of YRD and the water inflow into Taihu Lake (WITL) in three typical years were calculated. The results show that the YRD has shown a significant upward trend in the past 30 years, accounting for 26.4, 35.6 and 42% of the total WITL in three typical years of wet, normal and dry respectively. From the perspective of space, Taige River is the largest river in the western part of the lake that is affected by the river diversion (35%–72%), and Wuxi River is the smallest (1–3%). In addition, the primary flow path of YRD to Taihu Lake was through the Wuyi River and Lake Gehu from the water diversion station west of the Zao River.

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“…S1, 31 o 25'00''N, 120 o 12'57''E) and is one of the areas where HABs often broke out seriously (Xu et al 2010). Especially, this region has been suffered from cyanobacteria for a long time and water quality was deteriorated ever since the early 1980s, switched to the eutrophic state in 1990s, and became hyper-eutrophic in recent years (Zhang et al 2020). Meanwhile, the resuspension of sediment often occurred in this area caused by natural wind forces.…”

Section: Sampling Area and Experimental Designmentioning

confidence: 99%

Processes and mechanisms of phosphorus mobility among sediment, water, and cyanobacteria under hydrodynamic conditions

Ren

Ding

et al. 2021

Environ Sci Pollut Res

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Phosphorus (P) has an important role in eutrophication and it is essential to explore the processes and mechanisms of P mobility in natural waters. In this study, laboratory experiments were conducted to simulate the SW system (sediment and water) and SAW system (sediment, algae and water) under four hydrodynamic intensity conditions (static control, 50 rpm, 125 rpm and 200 rpm treatments), to investigate P mobility. Results in SW system showed that, sediment was an important source of P for overlying water, and the released total P (TP) increased with stronger hydrodynamic intensity, when P associated with metal pools (redox-sensitive P [BD-P] and meta-oxides bound P [NaOH-P]) were the most unstable and easier to migrate into the overlying water. Stronger hydrodynamic disturbances could enhance the processes including sediment resuspension, dissolution of particles, and release of P, when P mobility had a close relationship with redox conditions near sediment-water interface (SWI). Therefore, the release of TP, BD-P and NaOH-P from sediment increased and decreased in the control and 50-200 rpm treatments over time. In SAW system, the release of TP signi cantly increased from sediment comparing to SW system, and the growth of Microcystis aeruginosa could selectively enhance the release of BD-P, NaOH-P, and organic P (OP). Meanwhile, the released P from sediment was quickly accumulated by algal cells. The maximum accumulation ability of P by cells, the highest photosynthetic e ciency and the best growth of M. aeruginosa were observed in 125 rpm treatment. But with excessively strong hydrodynamic intensity (200 rpm treatment), the accumulation ability of P and alkaline phosphatase activity (APA) of M. aeruginosa was suppressed, which might hinder algal utilization of P and inhibit algal growth. Overall, our ndings demonstrated the patterns of P mobility in natural ecosystems and could contribute to the understanding of P cycling.

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Phenotype changes of cyanobacterial and microbial distribution characteristics of surface sediments in different periods of cyanobacterial blooms in Taihu Lake

Cited by 9 publications

References 69 publications

The combined impact of low temperatures and shifting phosphorus availability on the competitive ability of cyanobacteria

The combined impact of low temperatures and shifting phosphorus availability on the competitive ability of cyanobacteria

Study on the proportion and flow path of Yangtze River water diversion into Taihu Lake

Processes and mechanisms of phosphorus mobility among sediment, water, and cyanobacteria under hydrodynamic conditions

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