Litter inputs and phosphatase activity affect the temporal variability of organic phosphorus in a tropical forest soil in the Central Amazon

17603 6 95819 2 294889 document 95819 Schaap2021_Article_LitterInputsAndPhosphataseActi.pdf application/pdf 956e6ff34a212064dba2cd56af59293d MD5 626234 2021-10-27 07:11:55 https://pure.iiasa.ac.at/id/eprint/17603/1/Schaap2021_Article_LitterInputsAndPhosphataseActi.pdf 17603 1 1 application/pdf text en public cc_by_4

Schaap2021_Article_LitterInputsAndPhosphataseActi.pdf

published 95821 1 294909 document 95821 indexcodes.txt text/x-c ac5c0a1e250eae450a2e82e2b25a9dc2 MD5 21893 2021-10-27 07:22:03 https://pure.iiasa.ac.at/id/eprint/17603/2/indexcodes.txt 17603 2 2 text/x-c other Generate index codes conversion from text to indexcodes en public

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http://eprints.org/relation/isVersionOf https://pure.iiasa.ac.at/id/document/95819 http://eprints.org/relation/isVolatileVersionOf https://pure.iiasa.ac.at/id/document/95819 http://eprints.org/relation/issmallThumbnailVersionOf https://pure.iiasa.ac.at/id/document/95819 archive 353 disk0/00/01/76/03 2021-10-27 07:14:46 2021-10-27 07:14:46 2021-10-27 07:14:46 article show Schaap K.J. Fuchslueger L. Hoosbeek M.R. Hofhansl F. 2222 0000-0003-0073-0946 Martins N.P. Valverde-Barrantes O.J. Hartley I.P. Lugli L.F. Quesada C.A. Litter inputs and phosphatase activity affect the temporal variability of organic phosphorus in a tropical forest soil in the Central Amazon pub BNR AFE BEC Purpose The tropical phosphorus cycle and its relation to soil 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 abiotic and biotic 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 intra-annual variation of tropical soil phosphorus pools using a modified Hedley sequential fractionation scheme. In addition, we measured litterfall, the mobilization of P from litter and soil extracellular phosphatase enzyme activity and tested their relation to fluctuations in P- fractions. Results Our results showed clear patterns of seasonal variability of soil P fractions during the year. We found that modeled P released during litter decomposition was 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 P by litter decomposition and potential soil extracellular phosphatase activity are the two main factors related to seasonal soil P fluctuations, and therefore the P economy in P impoverished soils. Organic soil P followed 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. 2021-10-18 published Springer 10.1007/s11104-021-05146-x 3022 public Plant and Soil TRUE 1573-5036 no info:eu-repo/semantics/article