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| Spatial and Temporal distribution and factors influencing phosphorus in surface sediments of Puzhehei river and lake wetland, China |
| Received:May 20, 2019 |
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| KeyWord:Puzhehei;wetland;sediments;phosphorus species;temporal and spatial distribution;environmental factors |
| Author Name | Affiliation | E-mail | | LIU Peng | College of Ecology and Environment, Southwest Forestry University, Kunming 650224, China | | | ZHANG Zi-xia | College of Ecology and Environment, Southwest Forestry University, Kunming 650224, China | | | ZHANG Chao | Forestry Institute, Southwest Forestry University, Kunming 650224, China | zhchgis@126.com | | WANG Yan | College of Ecology and Environment, Southwest Forestry University, Kunming 650224, China | | | YANG Bo | College of Ecology and Environment, Southwest Forestry University, Kunming 650224, China | | | ZHANG Ye-fei | College of Ecology and Environment, Southwest Forestry University, Kunming 650224, China | |
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| Abstract: |
| It is crucial to investigate the total phosphorus(TP) temporal and spatial distributions in the surface sediments and the factors affecting phosphorus species to understand the eutrophication of Puzhehei wetland. As such, the four-step continuous extraction and redundancy analysis were employed to study the TP spatial and temporal distributions and related factors. Our data showed that TP content in the surface sediments of rivers and lakes was 415~1903 and 244~2474 mg·kg-1, respectively, indicating moderate pollution levels. However, TP content in both Xiangshui River and the middle lake showed higher levels as follows:low-water period > high-water period > normalwater period. In addition, the concentrations of phosphorus species in two wetlands were:NaOH-rP > Res-P > NaOH-nrP > BD-P > HClP > NH4Cl-P. The sum of NaOH-rP and Res-P accounted for 55.4%, whereas HCl-P and NH4Cl-P accounted for less than 3% of TP suggesting a high environmental risk. Moreover, NH4Cl-P was affected by environmental factors. BD-P and NaOH-rP were negatively correlated with pH, but positively correlated with oxidation-reduction potential(OPR) and the adhesion of total organic carbon(TOC) to NaOHnrP. HCl-P was negatively affected by pH. But, Res-P was relatively stable. |
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