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The potential role of sediment organic phosphorus in algal growth in a low nutrient lake.
Environ Pollut. 2019 Dec; 255(Pt 2):113235.EP

Abstract

The role of sediment-bound organic phosphorus (Po) as an additional nutrient source is a component of internal P budgets in lake system that is usually neglected. Here we examined the relative importance of sediment Po to internal P load and the role of bioavailable Po in algal growth in Lake Erhai, China. Lake Erhai sediment extractable Po accounted for 11-43% (27% average) of extractable total P, and bioavailable Po accounted for 21-66% (40%) of Po. The massive storage of bioavailable Po represents an important form of available P, essential to internal loads. The bioavailable Po includes mainnly labile monoester P and diester P was identified in the sequential extractions by H2O, NaHCO3, NaOH, and HCl. 40% of H2O-Po, 39% of NaHCO3-Po, 43% of NaOH-Po, and 56% of HCl-Po can be hydrolyzed to labile monoester and diester P, suggesting that the bioavailability of Po fractions was in decreasing order as follows: HCl-Po > NaOH-Po > H2O-Po > NaHCO3-Po. It is implied that traditional sequential fractionation of Po might overestimate the availability of labile Po in sediments. Furthermore, analysis of the environmental processes of bioavailable Po showed that the stabler structure of dissloved organic matter (DOM) alleviated the degradation and release of diester P, abundant alkaline phosphatase due to higher algal biomass promoted the degradation of diester P. The stability of DOM structure and the degradation of diester P might responsible for the spatial differences of labile monoester P. The biogeochemical cycle of bioavailable Po replenishs available P pools in overlying water and further facilitate algal growth during the algal blooms. Therefore, to control the algal blooms in Lake Erhai, an effective action is urgently required to reduce the accumulation of Po in sediments and interrupt the supply cycle of bioavailable Po to algal growth.

Authors+Show Affiliations

Engineering Research Center of Ministry of Education on Groundwater Pollution Control and Remediation, College of Water Sciences, Beijing Normal University, Beijing, 100875, China. Electronic address: nizhaokui@gmail.com.Engineering Research Center of Ministry of Education on Groundwater Pollution Control and Remediation, College of Water Sciences, Beijing Normal University, Beijing, 100875, China; China Three Gorges University, College of Hydraulic&Environmental Engineering, Yichang, 443002, China; Yunnan Key Laboratory of Pollution Process and Management of Plateau Lake- Watershed, Kunming, Yunnan Province, 650034, China. Electronic address: Wangsr@bnu.edu.cn.Engineering Research Center of Ministry of Education on Groundwater Pollution Control and Remediation, College of Water Sciences, Beijing Normal University, Beijing, 100875, China.Centre for Ecology & Hydrology, Maclean Building, Benson Lane, Crowmarsh Gifford, Wallingford, Oxfordshire, OX10 8BB, UK; Lancaster Environment Centre, University of Lancaster, Library Avenue, Lancaster University, LA1 4YQ, UK.Centre for Ecology & Hydrology, Maclean Building, Benson Lane, Crowmarsh Gifford, Wallingford, Oxfordshire, OX10 8BB, UK.Centre for Ecology & Hydrology, Lancaster Environment Centre, Library Avenue, Lancaster, LA1 4AP, UK.Centre for Ecology & Hydrology, Bush Estate, Penicuik, Midlothian, EH26 0QB, UK.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

31561036

Citation

Ni, Zhaokui, et al. "The Potential Role of Sediment Organic Phosphorus in Algal Growth in a Low Nutrient Lake." Environmental Pollution (Barking, Essex : 1987), vol. 255, no. Pt 2, 2019, p. 113235.
Ni Z, Wang S, Cai J, et al. The potential role of sediment organic phosphorus in algal growth in a low nutrient lake. Environ Pollut. 2019;255(Pt 2):113235.
Ni, Z., Wang, S., Cai, J., Li, H., Jenkins, A., Maberly, S. C., & May, L. (2019). The potential role of sediment organic phosphorus in algal growth in a low nutrient lake. Environmental Pollution (Barking, Essex : 1987), 255(Pt 2), 113235. https://doi.org/10.1016/j.envpol.2019.113235
Ni Z, et al. The Potential Role of Sediment Organic Phosphorus in Algal Growth in a Low Nutrient Lake. Environ Pollut. 2019;255(Pt 2):113235. PubMed PMID: 31561036.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - The potential role of sediment organic phosphorus in algal growth in a low nutrient lake. AU - Ni,Zhaokui, AU - Wang,Shengrui, AU - Cai,Jingjing, AU - Li,Hong, AU - Jenkins,Alan, AU - Maberly,Stephen C, AU - May,Linda, Y1 - 2019/09/11/ PY - 2019/07/21/received PY - 2019/09/10/revised PY - 2019/09/10/accepted PY - 2019/9/29/pubmed PY - 2020/1/16/medline PY - 2019/9/28/entrez KW - Algal growth KW - Bioavailability KW - Organic phosphorus KW - Sediment SP - 113235 EP - 113235 JF - Environmental pollution (Barking, Essex : 1987) JO - Environ Pollut VL - 255 IS - Pt 2 N2 - The role of sediment-bound organic phosphorus (Po) as an additional nutrient source is a component of internal P budgets in lake system that is usually neglected. Here we examined the relative importance of sediment Po to internal P load and the role of bioavailable Po in algal growth in Lake Erhai, China. Lake Erhai sediment extractable Po accounted for 11-43% (27% average) of extractable total P, and bioavailable Po accounted for 21-66% (40%) of Po. The massive storage of bioavailable Po represents an important form of available P, essential to internal loads. The bioavailable Po includes mainnly labile monoester P and diester P was identified in the sequential extractions by H2O, NaHCO3, NaOH, and HCl. 40% of H2O-Po, 39% of NaHCO3-Po, 43% of NaOH-Po, and 56% of HCl-Po can be hydrolyzed to labile monoester and diester P, suggesting that the bioavailability of Po fractions was in decreasing order as follows: HCl-Po > NaOH-Po > H2O-Po > NaHCO3-Po. It is implied that traditional sequential fractionation of Po might overestimate the availability of labile Po in sediments. Furthermore, analysis of the environmental processes of bioavailable Po showed that the stabler structure of dissloved organic matter (DOM) alleviated the degradation and release of diester P, abundant alkaline phosphatase due to higher algal biomass promoted the degradation of diester P. The stability of DOM structure and the degradation of diester P might responsible for the spatial differences of labile monoester P. The biogeochemical cycle of bioavailable Po replenishs available P pools in overlying water and further facilitate algal growth during the algal blooms. Therefore, to control the algal blooms in Lake Erhai, an effective action is urgently required to reduce the accumulation of Po in sediments and interrupt the supply cycle of bioavailable Po to algal growth. SN - 1873-6424 UR - https://www.unboundmedicine.com/medline/citation/31561036/The_potential_role_of_sediment_organic_phosphorus_in_algal_growth_in_a_low_nutrient_lake_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0269-7491(19)34002-3 DB - PRIME DP - Unbound Medicine ER -