caa a22 4500 605516693 CHVBK 20210128100715.0 cr unu---uuuuu 210128e20150501xx s 000 0 eng 10.1007/s10533-015-0079-2 doi (NATIONALLICENCE)springer-10.1007/s10533-015-0079-2 A new conceptual model on the fate and controls of fresh and pyrolized plant litter decomposition [Elektronische Daten] [Jennifer Soong, William Parton, Francisco Calderon, Eleanor Campbell, M. Cotrufo] 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 litter-soil-atmosphere 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+α-Cellulose)] was a stronginversepredictor of later stage DOC:CO2 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 cycling. Springer International Publishing Switzerland, 2015 Leaf litter nationallicence Pyrogenic organic matter nationallicence Decomposition nationallicence Dissolved organic matter nationallicence Dissolved organic carbon nationallicence Leaching nationallicence Respiration nationallicence FTIR nationallicence Soong Jennifer Natural Resource Ecology Laboratory, Colorado State University, Fort Collins, USA aut Parton William Natural Resource Ecology Laboratory, Colorado State University, Fort Collins, USA aut Calderon Francisco Central Great Plains Research Station, USDA-ARS, Akron, USA aut Campbell Eleanor Natural Resource Ecology Laboratory, Colorado State University, Fort Collins, USA aut Cotrufo M. Natural Resource Ecology Laboratory, Colorado State University, Fort Collins, USA aut Biogeochemistry Springer International Publishing 124/1-3(2015-05-01), 27-44 0168-2563 124:1-3<27 2015 124 10533 https://doi.org/10.1007/s10533-015-0079-2 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10533-015-0079-2 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Soong Jennifer Natural Resource Ecology Laboratory, Colorado State University, Fort Collins, USA aut NATIONALLICENCE 700 1- Parton William Natural Resource Ecology Laboratory, Colorado State University, Fort Collins, USA aut NATIONALLICENCE 700 1- Calderon Francisco Central Great Plains Research Station, USDA-ARS, Akron, USA aut NATIONALLICENCE 700 1- Campbell Eleanor Natural Resource Ecology Laboratory, Colorado State University, Fort Collins, USA aut NATIONALLICENCE 700 1- Cotrufo M. Natural Resource Ecology Laboratory, Colorado State University, Fort Collins, USA aut NATIONALLICENCE 773 0- Biogeochemistry Springer International Publishing 124/1-3(2015-05-01), 27-44 0168-2563 124:1-3<27 2015 124 10533