Vertical Variation in Dissolved Alkaline Phosphatase Activity in a Shallow Eutrophic Lake Determined in Reverse Micelles

Song, Changchun; Cao, Xiuyun; Li, Jianqiu; Li, Qingman; Zhou, Yiyong

doi:10.1080/02705060.2005.9664784

Cited by 3 publications

(3 citation statements)

References 24 publications

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“…with the former being algae and the latter being bacterial (Song et al,2005). It was deduced that phytoplankton acted as the main contributor of dissolved APA in our research.…”

Section: Discussionmentioning

confidence: 52%

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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“…with the former being algae and the latter being bacterial (Song et al,2005). It was deduced that phytoplankton acted as the main contributor of dissolved APA in our research.…”

Section: Discussionmentioning

confidence: 52%

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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“…Nevertheless, some study found that the dissolved APA might origin from bacteria 26 . In order to elucidate the origins of dissolved APA, the dissolved alkaline phosphatase was capsulated into reverse micellar media, and it was proved that the different behaviors of dissolved phosphatase of surface and overlying water might be due to the different origins, with the former being algae and the latter being bacterial 27 . The results of Song et al .…”

Section: Discussionmentioning

confidence: 99%

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

Yuan

2017

Sci Rep

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In order to reveal the role of phytoplankton in the spatio-temporal distribution of alkaline phosphatase activity (APA), monthly investigations were conducted in the Xiaojiang River, a tributary of the Three Gorges Reservoir in China. Different APA fractions, environmental parameters, and phytoplankton communities were followed. High spatio-temporal variations of APA were observed, with the highest value in summer and the lowest in winter. The annual average APAT (total alkaline phosphatase activity) ranged from 7.78–14.03 nmol∙L−1∙min−1 with the highest in the midstream and the lowest in the estuary. The dominant phytoplankton phyla in summer and winter were Cyanophyta and Bacillariophyta, respectively. The mean cell density in the midstream and in the estuary was 5.2 × 107 cell∙L−1 and 1.4 × 107 cell∙L−1, respectively. That APA>3.0 μm was significantly higher than APA0.45-3 μm indicating 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, total phosphorus, chemical oxygen demand, water temperature (WT), pH and chlorophyll a were proved to be positively correlated with APA; soluble reactive phosphorus, conductivity, transparency 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 WT and WL.

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“…In this respect, the positive relationship between total phytoplankton biomass and nutrient element (especially phosphorus) were widely considered all over the world. It was proved that there were nonlinear relationships between these two variables (Watson et al, 1992;Song et al, 2005;Cha et al, 2013). For instance, the best available TP-Chl a model was sigmoid regression by considering five published relationships (Brown et al, 2000).…”

Section: Introductionmentioning

confidence: 99%

Sediment–water interaction in phosphorus cycling as affected by trophic states in a Chinese shallow lake (Lake Donghu)

Chen

Hou

et al. 2016

Hydrobiologia

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Lake sediment substantially accumulates nutrients, while little is known regarding the conditions under which it tends to be a sink or source of phosphorus. It is postulated that the above functions were largely dependent on trophic state. To test this hypothesis, composition, abundance, and size-spectrum of phytoplankton were studied in a Chinese shallow lake (Lake Donghu), together with concentrations and sorption behaviors of phosphorus in water column and sediment. Relationships among these variables were also examined by structural equation model. In the basins with the lowest phosphorus concentration, sediment was a phosphorus source as judged by equilibrium phosphorus concentration, directly affecting the abundance of phytoplankton with smaller size. Contrastingly, in the basins with the highest phosphorus concentration, sediment tended to uptake phosphorus, companied by the lowest ratio of nitrogen to phosphorus, diversity, and evenness of phytoplankton with the smaller size one dominating. Oscillatoria sp. was directly affected by ammonia and phosphorus. Moreover, with a balanced exchange of phosphorus between sediment and water column, phytoplankton increased markedly with the highest diversity and evenness in the basins having intermediate phosphorus concentration. Overall, trophic state modulated sediment functions to supply nutrient and was in turn greatly affected by the sediment in shallow lakes.

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Vertical Variation in Dissolved Alkaline Phosphatase Activity in a Shallow Eutrophic Lake Determined in Reverse Micelles

Cited by 3 publications

References 24 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

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

Sediment–water interaction in phosphorus cycling as affected by trophic states in a Chinese shallow lake (Lake Donghu)

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