Articles | Volume 20, issue 11
https://doi.org/10.5194/bg-20-2189-2023
https://doi.org/10.5194/bg-20-2189-2023
Research article
 | 
15 Jun 2023
Research article |  | 15 Jun 2023

Seasonal controls override forest harvesting effects on the composition of dissolved organic matter mobilized from boreal forest soil organic horizons

Keri L. Bowering, Kate A. Edwards, and Susan E. Ziegler

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Cited articles

Averill, C. and Waring, B.: Nitrogen limitation of decomposition and decay: How can it occur?, Glob. Change Biol., 24, 1417–1427, https://doi.org/10.1111/gcb.13980, 2018. 
Batterson, M. J. and Catto, N. R.: Topographically-controlled deglacial history of the Humber River basin, western Newfoundland, Geogr. Phys. Quatern., 55, 213–228, https://doi.org/10.7202/006851ar, 2001. 
Berggren, M. and Giorgio, P. A.: Distinct patterns of microbial metabolism associated to riverine dissolved organic carbon of different source and quality, J. Geophys. Res.-Biogeo., 120, 989–999, https://doi.org/10.1002/2015jg002963, 2015. 
Bowering, K. L., Edwards, K. A., Prestegaard, K., Zhu, X., and Ziegler, S. E.: Dissolved organic carbon mobilized from organic horizons of mature and harvested black spruce plots in a mesic boreal region, Biogeosciences, 17, 581–595, https://doi.org/10.5194/bg-17-581-2020, 2020. 
Bowering, K. L., Edwards, K. A., and Ziegler, S. E.: Seasonal controls override forest harvesting effects on the composition of dissolved organic matter mobilized from boreal forest soil organic horizons (1.0), Zenodo [data set], https://doi.org/10.5281/zenodo.8019215, 2023. 
Short summary
Dissolved organic matter (DOM) mobilized from surface soils is a source of carbon (C) for deeper mineral horizons but also a mechanism of C loss. Composition of DOM mobilized in boreal forests varied more by season than as a result of forest harvesting. Results suggest reduced snowmelt and increased fall precipitation enhance DOM properties promoting mineral soil C stores. These findings, coupled with hydrology, can inform on soil C fate and boreal forest C balance in response to climate change.
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