2020
DOI: 10.1007/s10533-020-00668-5
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The role of the understory in litter DOC and nutrient leaching in boreal forests

Abstract: Dissolved organic carbon (DOC) derived from plant litter plays an important role in the ecosystem carbon balance and soil biogeochemistry. However, in boreal coniferous forests no integrated understanding exists of how understory vegetation contributes to litter leaching of DOC, nitrogen (N) and phosphorus (P) with different bioavailability at the forest stand level. We characterized water extractable leachates from fresh and decayed litter of dominant canopy and understory sources in a boreal coniferous fores… Show more

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Cited by 30 publications
(26 citation statements)
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“…O) layer as it grades into the A layer leads to increased leaching. This is in accordance with studies showing that leaching from pine litter, the main component of the O horizon in this study, increases as decomposition advances 52 , 53 . The Δ 14 C SOC signal of the O horizon indicates an average origin of roughly 20 years ago.…”
Section: Introductionsupporting
confidence: 93%
“…O) layer as it grades into the A layer leads to increased leaching. This is in accordance with studies showing that leaching from pine litter, the main component of the O horizon in this study, increases as decomposition advances 52 , 53 . The Δ 14 C SOC signal of the O horizon indicates an average origin of roughly 20 years ago.…”
Section: Introductionsupporting
confidence: 93%
“…Following collection, pure water extractions were carried out using a 48-h shaking (140 RPM) protocol at room temperature (Hensgens et al 2020). After filtration (0.7 lm; Whatman GF/F) and dilution to 5.9 mg C l -1 , samples were taken for FT-ICR MS analyses, acidified to pH * 2 using ultrapure HCl and immediately frozen (-24°C).…”
Section: Dom Extraction and Samplingmentioning
confidence: 99%
“…The characterization of litter-leached DOM has often not been detailed enough to provide a molecular understanding of the leaching dynamics and involved processes (Brock et al 2020). For example, while it is well-documented that there are large variations in microbial bioavailability of DOM (BDOM) between DOM leached from different litter sources (Cleveland et al 2004;Silveira 2011;Hensgens et al 2020) and at different litter decay stages (Don and Kalbitz 2005;Hensgens et al 2020), it is unknown if corresponding differences exist on a molecular composition level. This leaves the fundamental question of how BDOM relates to litter molecular DOM composition unanswered.…”
Section: Introductionmentioning
confidence: 99%
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