Effects of turbulence on alkaline phosphatase activity of phytoplankton and bacterioplankton in Lake Taihu

Zhou, Jian; Qin, Boqiang; Casenave, Céline; Han, Xiaoxia

doi:10.1007/s10750-015-2413-z

Cited by 11 publications

(5 citation statements)

References 42 publications

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“…For the sake of flood control and hydropower, the water level in the TGR is subjected to the specific management of the TGD and is meant to seasonally fluctuate between 145 and 175 m a.s.l. It has been demonstrated that the turbulence promoted the phytoplanktonic APA and accelerated the biogeochemical cycle of P in Lake Taihu (Zhou et al, 2016). This was consistent with our results that the high APA was present during the significant water level fluctuated period from spring to autumn.…”

Section: Discussionsupporting

confidence: 93%

Phytoplankton communities determine the spatio-temporal heterogeneity of alkaline phosphatase activity: evidence from a tributary of the Three Gorges Reservoir

Yuan

2016

Preprint

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In order to know the role of phytoplankton communities in the distribution pattern of alkaline phosphatase activity (APA), monthly investigation was conducted in the Xiaojiang River, a tributary of the Three Gorges Reservoir (TGR). Different APA fractions (APAT, APA<&thinsp;0.45&thinsp;μm, APA0.45&ndash;3&thinsp;μm and APA>&thinsp;3.0&thinsp;μm), environmental parameters, and phytoplankton communities were screened synchronously. Significant spatio-temporal differences of APA with the highest value in summer and the lowest in winter (P&thinsp;<&thinsp;0.05) were observed. The annual average APAT ranged from 7.78&ndash;14.03&thinsp;nmol&thinsp;L&minus;1&thinsp;min&minus;1 with the highest in the midstream and the lowest in the estuary. The dominant phytoplankton species in summer and winter were Cyanophyta and Bacillariophyta, respectively. The mean cell density in the midstream and in the estuary were 5.2&thinsp;&times;&thinsp;107&thinsp;cell&thinsp;L&minus;1 and 1.4&thinsp;&times;&thinsp;107&thinsp;cell&thinsp;L&minus;1, respectively. That APA>&thinsp;3.0&thinsp;μm were significantly higher than APA0.45&ndash;3&thinsp;μm indicated phytoplankton was the main contributor to alkaline phosphatase. Correlation analysis indicated the dominant species and cell density could determine the distribution pattern of APA. Turbidity (Turb), total phosphorus (TP), chemical oxygen demand (COD), water temperature (WT), pH and chlorophyll a (Chl a) were proved to be positively correlated with APA; soluble reactive phosphorus (SRP), conductivity (Cond), transparency (SD) and water level (WL) were negatively correlated with APA. It was concluded that spatio-temporal heterogeneity of APA determined by phytoplankton communities was related to water temperature and hydrodynamics.

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Section: Discussionsupporting

confidence: 93%

Phytoplankton communities determine the spatio-temporal heterogeneity of alkaline phosphatase activity: evidence from a tributary of the Three Gorges Reservoir

Yuan

2016

Preprint

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“…The experiment was carried out in 12 acid-cleaned transparent glass mesocosms with 60 × 30 × 70 cm dimensions (Fig. S1 , detailed in our previous studies 32 , 33 ) from July 7 th to July 16 th 2014. Surface lake water (0.2 m, ~96 L) was pumped directly into each mesocosm from the nearshore (10 m away) of Meiliang Bay, Lake Taihu.…”

Section: Methodsmentioning

confidence: 99%

“…The different levels of turbulence intensities used in this study were based on actual conditions previously observed in Lake Taihu in summer 2013. Turbulence intensity was determined using an acoustic Doppler velocimeter (10 MHz ADVField, Sontek/YSI, San Diego, California, USA), following the methods fully detailed in our previous studies 32 , 33 (Supplementary materials and methods). In Taihu, the corresponding energy dissipation rates ( ɛ ) significantly varied from 6.01 × 10 −8 to 2.39 × 10 −4 m 2 s −3 (Table 1 ), which corresponded to the range of values (from 1.07 × 10 −7 to 6.67 × 10 −3 m 2 s −3 ) previously measured in the large, shallow Lake Balaton in Hungary 20 .…”

Section: Methodsmentioning

confidence: 99%

The sensitivity and stability of bacterioplankton community structure to wind-wave turbulence in a large, shallow, eutrophic lake

Zhou

Qin

Han

et al. 2017

Sci Rep

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Lakes are strongly influenced by wind-driven wave turbulence. The direct physical effects of turbulence on bacterioplankton community structure however, have not yet been addressed and remains poorly understood. To examine the stability of bacterioplankton communities under turbulent conditions, we simulated conditions in the field to evaluate the responses of the bacterioplankton community to physical forcing in Lake Taihu, using high-throughput sequencing and flow cytometry. A total of 4,520,231 high quality sequence reads and 74,842 OTUs were obtained in all samples with α-proteobacteria, γ-proteobacteria and Actinobacteria being the most dominant taxa. The diversity and structure of bacterioplankton communities varied during the experiment, but were highly similar based on the same time of sampling, suggesting that bacterioplankton communities are insensitive to wind wave turbulence in the lake. This stability could be associated with the traits associated with bacteria. In particular, turbulence favored the growth of bacterioplankton, which enhanced biogeochemical cycling of nutrients in the lake. This study provides a better understanding of bacterioplankton communities in lake ecosystems exposed to natural mixing/disturbances.

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“…AP activity is commonly used as an indicator for algal P-deficiency in natural aquatic ecosystems [ 43 , 44 , 45 ]. However, this study shows that AP activity also detects P-deficiency in laboratory algal species grown in real wastewater.…”

Section: Resultsmentioning

confidence: 99%

Increasing Phosphorus Uptake Efficiency by Phosphorus-Starved Microalgae for Municipal Wastewater Post-Treatment

et al. 2021

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Four microalgal species, Chlorella vulgaris, Botryococcus braunii, Ankistrodesmus falcatus, and Tetradesmus obliquus were studied for enhanced phosphorus removal from municipal wastewater after their exposure to phosphorus starvation. Microalgae were exposed to phosphorus starvation conditions for three and five days and then used in a batch experiment to purify an effluent from a small WWTP. After 3-day P-starvation, C. vulgaris biomass growth rate increased by 50% and its PO4 removal rate reached >99% within 7 days. B. braunii maintained good biomass growth rate and nutrient removal regardless of the P-starvation. All species showed 2–5 times higher alkaline phosphatase activity increase for P-starved biomass than at the reference conditions, responding to the decline of PO4 concentration in wastewater and biomass poly-P content. The overall efficiency of biomass P-starvation on enhanced phosphorus uptake was found to be dependent on the species, N/P molar ratio in the wastewater, as well as the biomass P content.

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Effects of turbulence on alkaline phosphatase activity of phytoplankton and bacterioplankton in Lake Taihu

Cited by 11 publications

References 42 publications

Phytoplankton communities determine the spatio-temporal heterogeneity of alkaline phosphatase activity: evidence from a tributary of the Three Gorges Reservoir

Phytoplankton communities determine the spatio-temporal heterogeneity of alkaline phosphatase activity: evidence from a tributary of the Three Gorges Reservoir

The sensitivity and stability of bacterioplankton community structure to wind-wave turbulence in a large, shallow, eutrophic lake

Increasing Phosphorus Uptake Efficiency by Phosphorus-Starved Microalgae for Municipal Wastewater Post-Treatment

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