Climate and geology overwrite land use effects on soil organic nitrogen cycling on a continental scale

17811 10 100107 2 306854 document 100107 bg-19-5419-2022.pdf application/pdf 98f3c4a798609b2295305e7eb29a1b88 MD5 2581641 2022-12-05 13:26:00 https://pure.iiasa.ac.at/id/eprint/17811/1/bg-19-5419-2022.pdf 17811 1 1 application/pdf text en public cc_by_4

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published 100108 1 306857 document 100108 indexcodes.txt text/x-c d2fe0859bf6fe07730ba7e639d33adf3 MD5 18675 2022-12-05 13:36:30 https://pure.iiasa.ac.at/id/eprint/17811/2/indexcodes.txt 17811 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/100107 http://eprints.org/relation/isVolatileVersionOf https://pure.iiasa.ac.at/id/document/100107 http://eprints.org/relation/issmallThumbnailVersionOf https://pure.iiasa.ac.at/id/document/100107 archive 353 disk0/00/01/78/11 2022-02-22 13:33:47 2022-12-05 13:26:40 2022-02-22 13:33:47 article show Noll L. Zhang S. Zheng Q. Hu Y. Hofhansl F. 2222 0000-0003-0073-0946 Wanek W. Climate and geology overwrite land use effects on soil organic nitrogen cycling on a continental scale pub BNR AFE BEC Soil fertility and plant productivity are globally constrained by N availability. Proteins are the largest N reservoir in soils and the cleavage of proteins into small peptides and amino acids has been shown to be the rate limiting step in the terrestrial N cycle. However, we are still lacking a profound understanding of the environmental controls of this process. Here we show that integrated effects of climate and soil geochemistry drive protein cleavage across large scales. We measured gross protein depolymerization rates in mineral and organic soils sampled across a 4000-km-long European transect covering a wide range of climates, geologies and land uses. Based on structural equation models we identified that soil organic N cycling was strongly controlled by substrate availability e.g. by soil protein content. Soil geochemistry was a secondary predictor by controlling protein stabilization mechanisms and protein availability. Precipitation was identified as the main climatic control on protein depolymerization by affecting soil weathering and soil organic matter accumulation. In contrast, land use was a poor predictor of protein depolymerization. Our results highlight the need to consider geology and precipitation effects on soil geochemistry when estimating and predicting soil N cycling at large scales. 2022-12-05 published European Geosciences Union (EGU) ; Copernicus 10.5194/bg-2022-41 3022 public Biogeosciences 19 23 5419-5433 FALSE 1726-4189 Climate and geology overwrite land use effects on soil organic nitrogen cycling on a continental scale no info:eu-repo/semantics/article