Variations of alkaline phosphatase activity and P fractions in sediments of a shallow Chinese eutrophic lake (Lake Taihu)

Zhang, Tingxi; Wang, Xiaorong; Jin, Xin

doi:10.1016/j.envpol.2007.01.007

Cited by 88 publications

(33 citation statements)

References 25 publications

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“…In Plimited wetlands, P added to the system is likely to be cycled rapidly, leading to limited or slow changes in nutrient contents (Newman et al 2001). Zhang et al (2007) found a positive relationship between PHA and TP in a P-limited wetland but C limitation resulted in constrained P mineralization (Penton and Newman 2007). Therefore, in P-limited wetlands, PHA would be positively correlated with P content and in C-limited wetlands this relationship would be less significant.…”

Section: Discussionmentioning

confidence: 95%

Phosphatase Activity Along Soil C and P Gradients in a Reed-Dominated Wetland of North China

et al. 2010

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Previous studies in oligotrophic wetlands showed that phosphatase activity (PHA) was positively related to soil total phosphorus (TP) content, and that PHA can serve as a predictor of wetland degradation. However, phosphatase dynamics are poorly known for eutrophic wetlands, where anthropogenic nutrient inputs elevate soil P content. We reported variations in PHA along a nutrient content gradient in soils of the eutrophic Baiyangdian wetland in North China. Soil PHA mainly responded to the soil organic carbon (C) content, and microbial biomass carbon. A positive correlation existed between PHA and C but not between PHA and TP in the wetland soils. The Baiyangdian wetland has high soil P content, averaging 598 mg kg −1. The high TP content caused the lower mass ratios between sediment C and TP (C:TP) that are lower than those reported in many wetlands. Results suggest that there may be a TP threshold above which PHA has no relationship with TP. A laboratory incubation study showed that PHA increased with added C, suggesting that the soil C content was a limiting factor for P mineralization in the Baiyangdian wetland. PHA, together with its limiting factors, could reflect the state of eutrophication of the wetland.

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Section: Discussionmentioning

confidence: 95%

Phosphatase Activity Along Soil C and P Gradients in a Reed-Dominated Wetland of North China

et al. 2010

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“…But in the case of the control, consumption of DO in the sediment and water by ammonia oxidation increased over the course of the experiment. Because, heterotrophic bacteria involved stronger ammonifying and denitrifying processes which resulted in more ammonia concentration in the sediment, which further moved into the water and kept the high ammonia concentration (Zhang et al 2007) and DO may have been consumed by this oxidation of ammonia (Asaoka et al 2009). …”

Section: Resultsmentioning

confidence: 99%

Nutrient dynamics study of overlying water affected by peroxide-treated sediment

Haque

Kwon

2017

j ecology environ

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Background: Loading of excess nutrient via bioremediation of polluted sediment to overlying water could trigger anoxia and eutrophication in coastal area. The aim of this research was to understand the changes of overlying water features such as dissolved oxygen (DO); pH; oxidation reduction potential (ORP); chlorophyll-a (Chl-a); and nitrogen nutrients ammonia (N-NH 4 + ), nitrate (N-NO 3 − ), and nitrite (N-NO 2 − ) when the sediment was not treated (control) and treated by calcium peroxide for 5 weeks. Methods: The water samples were analyzed for measuring physical and chemical properties along with the sediment analyzed by polymerase chain reaction (PCR) including denaturing gradient gel electrophoresis (DGGE) for identifying the phylogenetic affiliation of microbial communities. Results: Results showed that due to the addition of calcium peroxide in sediment, the overlying water exposed the rise of dissolve oxygen, pH, and ORP than control. Among the nitrogen nutrients, ammonia inhibition was higher in calcium peroxide treatment than control but in case of nitrate inhibition, it was reversed than control. Chlorophyll-a was declined in treatment column water by 30% where it was 20% in control column water. Actibacter and Salegentibacter group were detectable in the calcium-peroxide-treated sediment; in contrary, no detectable community ware found in control sediment. Both phylogenetic groups are closely related to marine microflora. Conclusions: This study emphasizes the importance of calcium peroxide as an oxygen release material. Interaction with peroxide proved to be enhancing the formation of microbial community that are beneficial for biodegradation and spontaneity of nutrient attenuation into overlying water.

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“…Furthermore, with greater phytoplankton biomass (or organic substances) accumulated in eutrophic lake sediments, activities of phosphatase (e.g. alkaline phosphatase) are usually greater in sediments [33,34]. Therefore, in Dianchi Lake sediments, the higher 0.00 1.00 2.00 3.00 4.00 A1 A2 A3 A4 A5 A6 A7 A8 B1 B2 B3 B4 B5 B6 B7 B8 C1 C2 C3 C4 C5 C6 C7 C8 D1 D2 D3 D4 D5 D6 D7 D8 E1 E2 E3 E4 E5 E6 E7 E8…”

Section: P Release and Epc 0 Determinationmentioning

confidence: 99%

Vertical distribution and release characteristics of phosphorus forms in the sediments from the river inflow area of Dianchi Lake, China

Yang

Xiao

Li³

et al. 2018

Chemical Speciation & Bioavailability

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Columnar sediment samples were collected from five representative river inflow areas of Dianchi Lake, China. The vertical distribution of each form of P were tested. , respectively. The concentration of Ex-P, Fe/Al-P, Ca-P and Org-P all decreased with increasing depth. The release of Ex-P was significantly related to TP whereas the Fe/Al-P was not significantly related to TP in the samples from areas polluted by domestic sewage. However, the release of Ex-P and Fe/Al-P were both significantly related to TP in the samples from areas polluted by phosphate mining and phosphate fertilizer application. The results of equilibrium P concentration (EPC0) analysis showed that P in the sediments of areas A, D and E were the source of P in Dianchi Lake, and the P in the sediments of areas B and C were in relative equilibrium with the overlying water.

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Variations of alkaline phosphatase activity and P fractions in sediments of a shallow Chinese eutrophic lake (Lake Taihu)

Cited by 88 publications

References 25 publications

Phosphatase Activity Along Soil C and P Gradients in a Reed-Dominated Wetland of North China

Phosphatase Activity Along Soil C and P Gradients in a Reed-Dominated Wetland of North China

Nutrient dynamics study of overlying water affected by peroxide-treated sediment

Vertical distribution and release characteristics of phosphorus forms in the sediments from the river inflow area of Dianchi Lake, China

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