Effects of Sediment Chemical Properties on Phosphorus Release Rates in the Sediment-Water Interface of the Steppe Wetlands

Jing He, Derong Su, Shihai Lv, Zhaoyan Diao, Jingjie Xie and Yan Luo
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Jing He: Grassland Resources and Ecology Research Center, Beijing Forestry University, Beijing 100083, China
Derong Su: Grassland Resources and Ecology Research Center, Beijing Forestry University, Beijing 100083, China
Shihai Lv: State Environmental Protection Key Laboratory of Regional Eco-Process and Function Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
Zhaoyan Diao: State Environmental Protection Key Laboratory of Regional Eco-Process and Function Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
Jingjie Xie: Grassland Resources and Ecology Research Center, Beijing Forestry University, Beijing 100083, China
Yan Luo: Grassland Resources and Ecology Research Center, Beijing Forestry University, Beijing 100083, China

IJERPH, 2017, vol. 14, issue 11, 1-15

Abstract: Rising temperature causes a process of phosphorus release, which can be characterized well using phosphorus release rates (V P ). The objective of the present study was to investigate the major factors affecting sediment phosphorus release rates through a wetland habitat simulation experiment. The results showed that the V P of different wetland sediments were different and changed with the order of W–R (river wetland) > W–L (lake wetland) > W–M (grassy marsh wetland) > W–A (reservoir wetland). The main driving factors which influenced sediment phosphorus flux velocity in the sediment–water interface were sediment B-SO 4 2? , B-MBN and A-MBP content. Path analysis and determination coefficient analysis indicated the standard multiple regression equation for sediment phosphorus release rates in the sediment–water interface, and each main factor was Y = ?0.105 + 0.096X 1 + 0.275X 2 ? 0.010X 3 ( r = 0.416, p < 0.01, n = 144), where Y is sediment phosphorus release rates; X 1 is sediment B-SO 4 2? content; X 2 is sediment B-MBN; and X 3 is sediment A-MBP content. Sediment B-SO 4 2? , B-MBN and A-MBP content and the interaction between them were the main factors affecting sediment phosphorus release rates in the sediment–water interface. Therefore, these results suggest that soil chemical properties and microbial activities likely play an important role in phosphorus release rates in the sediment–water interface. We hope to provide effective scientific management and control methods for relevant environmental protection departments.

Keywords: steppe wetland; sediment chemical properties; phosphorus release rates; sediment–water interface; microbial biomass (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2017
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