title: Processes and their explanatory factors governing distribution of organic phosphorous pools in lake sediments.
abstract: The amount of organic phosphorus (OP) and its distribution among different pools in lake sediments depends on biotic and abiotic processes driving the OP fractionation. Key environmental factors governing these transformations processes between OP fractionations in sediments were studied on the basis of geochemical characteristics of OP pools in relation to environmental factors in the sediments. The results illustrate that the factors influencing the accumulation or depletion of different OP pools were intrinsically dependent on the composition of the deposited organic matter (OM). During the mineralization of the OM the microorganisms excrete the enzyme alkaline phosphatase, accelerating the OP hydrolysis, and thereby setting the grounds for the bacterially-mediated oxidation of OM. There are two main degradation products of the labile OP pool (LOP) and the moderately labile OP pool (MLOP): Either the OP is transformed to a dissolved organic or inorganic P form, and thereby released to water column, or OP is transformed to a non-labile OP pool and stored in the sediments. A comparative study showed that oxy-hydroxides of iron (Fe) and aluminum (Al) only played an important role in influencing OP fractionation in Lake Wuliangsuhai, while the complexation reactions of OP with calcium ions and sorption to its minerals are key factors governing the OP fractionation in the two alkaline lakes. It is worth noting that a significant correlation between the Fe-P pool and the pools of LOP and MLOP indicates that the degradation of the rather labile OP pools are highly dependent on the iron redox reaction.
authors.affiliation: College of Environment and Resources, Inner Mongolia University, Huhhot 010021, China; Institute of Environmental Geology, Inner Mongolia University, Huhhot 010021, China; Department of Chemistry, University of Oslo, N-0315, Norway. Electronic address: lcw2008@imu.edu.cn.
authors.forename: Changwei
authors.initials: C
authors.lastname: Lü
authors.affiliation: College of Environment and Resources, Inner Mongolia University, Huhhot 010021, China; Institute of Environmental Geology, Inner Mongolia University, Huhhot 010021, China. Electronic address: ndjhe@imu.edu.cn.
authors.forename: Jiang
authors.initials: J
authors.lastname: He
authors.affiliation: College of Environment and Resources, Inner Mongolia University, Huhhot 010021, China.
authors.forename: Le
authors.initials: L
authors.lastname: Zuo
authors.affiliation: Department of Chemistry, University of Oslo, N-0315, Norway.
authors.forename: Rolf D
authors.initials: RD
authors.lastname: Vogt
authors.affiliation: Department of Chemistry, University of Oslo, N-0315, Norway.
authors.forename: Liang
authors.initials: L
authors.lastname: Zhu
authors.affiliation: Department of Chemistry, University of Oslo, N-0315, Norway; Tianjin Academy of Environmental Sciences, Tianjin, 300191, China.
authors.forename: Bin
authors.initials: B
authors.lastname: Zhou
authors.affiliation: Department of Chemistry, University of Oslo, N-0315, Norway.
authors.forename: Christian W
authors.initials: CW
authors.lastname: Mohr
authors.affiliation: College of Environment and Resources, Inner Mongolia University, Huhhot 010021, China.
authors.forename: Rui
authors.initials: R
authors.lastname: Guan
authors.affiliation: College of Environment and Resources, Inner Mongolia University, Huhhot 010021, China.
authors.forename: Weiying
authors.initials: W
authors.lastname: Wang
authors.affiliation: College of Environment and Resources, Inner Mongolia University, Huhhot 010021, China.
authors.forename: Daohao
authors.initials: D
authors.lastname: Yan
mesh_terms: D000535:Aluminum / Q000032:analysis; D001673:Biodegradation, Environmental; D002118:Calcium / Q000032:analysis; D002681:China; D004784:Environmental Monitoring / Q000379:methods*; D019015:Geologic Sediments / Q000737:chemistry*; D006812:Humic Substances / Q000032:analysis; D006878:Hydroxides / Q000032:analysis; D007501:Iron / Q000032:analysis; D060106:Lakes / Q000737:chemistry*; D009943:Organophosphorus Compounds / Q000032:analysis*; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D006812:Humic Substances; D006878:Hydroxides; D009943:Organophosphorus Compounds; D014874:Water Pollutants, Chemical; D000535:Aluminum; D007501:Iron; D002118:Calcium
keywords: Driving processes and factors; Fraction distribution; Lakes; Organic phosphorus; Sediments