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Title of Journal: Biogeochemistry

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Abbravation: Biogeochemistry

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Springer International Publishing

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DOI

10.1007/bf01281996

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1573-515X

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A new conceptual model on the fate and controls of

Authors: Jennifer L Soong William J Parton Francisco Calderon Eleanor E Campbell M Francesca Cotrufo
Publish Date: 2015/02/25
Volume: 124, Issue: 1-3, Pages: 27-44
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Abstract

In recent years litter decomposition studies have begun to move beyond the concept of mass loss to consider the fate of fresh and pyrolized decomposing plant material in the ecosystem However these concepts have yet to be incorporated into conceptual models of litter decomposition Understanding how fresh and pyrolized plant litter chemical traits control the partitioning of mass loss to dissolved organic carbon DOC leaching and respiration to CO2 would help to inform models of littersoilatmosphere carbon C cycling To test these controls we incubated five fresh and one pyrolized leaf litters with differing chemistry and measured DOC and CO2 fluxes as well as changes in substrate and dissolved organic matter DOM chemistry over time using Fourier transformed infrared spectroscopy and wet chemistry We found that the amount of hot water extractable C was a strong predictor of initial DOC leaching while the lignocellulose index Lignin/Lignin + αCellulose was a strong inverse predictor of later stage DOCCO2 partitioning Changes in substrate and DOM chemistry indicated a progression of substrate availability for leaching from soluble plant components to partially decomposed cellulose and lignin to microbial products Based on these results we developed a new conceptual model that demonstrates how chemical traits of fresh and pyrolyzed plant litter can be used to predict the fate of aboveground organic matter decomposition and form a better linkage between aboveground decomposition and terrestrial ecosystem C cyclingThis work would not have been possible without help from D Rutherford at USGS C Rhodes and D Pierson at USFS K Guilbert D Reuss C Pinney J Botte and M Jurich at Ecocore The work was funded by the NSFDEB grant 0918482 the NSF Graduate Research Fellowship Program and the NSF Research Experience for Teacher program The analytical work was carried out at the EcoCore analytical services facility at Colorado State University http//ecocorenrelcolostateedu/

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Other Papers In This Journal:
  1. Soluble reactive phosphorus (SRP) transport and retention in tropical, rain forest streams draining a volcanic landscape in Costa Rica: in situ SRP amendment to streams and laboratory studies
  2. Controls on the rate of CO 2 emission from woody debris in clearcut and coniferous forest environments
  3. Relations of mineral-soil C and N to climate and texture: regional differences within the conterminous USA
  4. A threshold reveals decoupled relationship of sulfur with carbon and nitrogen in soils across arid and semi-arid grasslands in northern China
  5. Groundwater nutrient concentrations near an incised midwestern stream: effects of floodplain lithology and land management
  6. Using 2D NMR spectroscopy to assess effects of UV radiation on cell wall chemistry during litter decomposition
  7. Age-related changes in litter inputs explain annual trends in soil CO 2 effluxes over a full Eucalyptus rotation after afforestation of a tropical savannah
  8. Dynamics of dissolved organic 14 C in throughfall and soil solution of a Norway spruce forest
  9. Erratum to: Retention and fate of groundwater-borne nitrogen in a coastal bay (Kinvara Bay, Western Ireland) during summer
  10. Retention and removal of nitrogen and phosphorus in saturated soils of arctic hillslopes
  11. Density fractionation of forest soils: methodological questions and interpretation of incubation results and turnover time in an ecosystem context
  12. Nitrification and denitrification in a midwestern stream containing high nitrate: in situ assessment using tracers in dome-shaped incubation chambers
  13. Interactions between leaf litter quality, particle size, and microbial community during the earliest stage of decay
  14. Interactive effects of disturbance and nitrogen availability on phosphorus dynamics of southern Appalachian forests
  15. Reduction of the temperature sensitivity of soil organic matter decomposition with sustained temperature increase
  16. Erratum to: An in-depth look into a tropical lowland forest soil: nitrogen-addition effects on the contents of N 2 O, CO 2 and CH 4 and N 2 O isotopic signatures down to 2-m depth
  17. Land–Water interactions in the amazon
  18. Getting to the root of the problem: litter decomposition and peat formation in lowland Neotropical peatlands
  19. Dynamics of soil organic carbon and soil fertility affected by alfalfa productivity in a semiarid agro-ecosystem
  20. Dynamics of soil organic carbon and soil fertility affected by alfalfa productivity in a semiarid agro-ecosystem
  21. Dominance of legume trees alters nutrient relations in mixed species forest restoration plantings within seven years
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