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- W4240743513 abstract "Abstract Purpose . The tropical phosphorus-cycle and its impacts on phosphorus (P) availability are a major uncertainty in projections of forest productivity. In highly weathered soils with low P concentrations, plant and microbial communities depend on biological and physical processes to acquire P. We explored the seasonality and relative importance of drivers controlling the fluctuation of common P pools via processes such as litter production and decomposition, and soil phosphatase activity. Methods . We analyzed variation of standard tropical soil phosphorus pools over one year. In addition, we measured litterfall, its decomposition rates and soil extracellular phosphatase enzyme activity and tested their relation to the fluctuations in P-fractions. Results. Our results show clear patterns of seasonal variability of soil P fractions during the year. We found that modeled P released during litter decomposition is positively related to change in organic P fractions, while net change in organic P fractions was negatively related to phosphatase activities in the top 5 cm. Conclusion . We conclude that input of organic P forms by litter decomposition and organically produced phosphatases are the two main factors controlling seasonal soil P fluctuation, and therefore the P economy in P impoverished soils. Organic soil P follows a clear seasonal pattern, indicating tight cycling of the nutrient, while reinforcing the importance of studying soil P as an integrated dynamic system in a tropical forest context." @default.
- W4240743513 created "2022-05-12" @default.
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- W4240743513 date "2021-06-08" @default.
- W4240743513 modified "2023-09-26" @default.
- W4240743513 title "Litter inputs and phosphatase activity control the temporal variability of organic phosphorus in a tropical forest soil in the Central Amazon" @default.
- W4240743513 doi "https://doi.org/10.21203/rs.3.rs-548371/v1" @default.
- W4240743513 hasPublicationYear "2021" @default.
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