Changes of riparian soil-plant system phosphorus responding to hydrological alternations of Three Gorges Reservoir.

ABSTRACT: The anti-seasonal hydrological alternation in the Three Gorges Reservoir (TGR) significantly impacts the release of phosphorus (P) from the riparian soil-plant system, posing a threat to the aquatic environment. To investigate this issue, riparian soils and plants in three tributaries of the central TGR were sampled at three distinct stages: early exposure, final exposure, and soon after inundation receded. Soil properties, P forms, and plant P content were analyzed. A significant decrease in exchangeable P and organic P during exposure, and a decrease in aluminum/iron-bound P during inundation were observed. These changes were linked to the mineralization of organic matter and the reduction of iron oxides. Compared to bioavailable inorganic P, bioavailable organic P contributed more to th

SUBMITTER: Zhang X 

PROVIDER: S-EPMC11829974 | biostudies-literature | 2025 Feb

REPOSITORIES: biostudies-literature