Impact of a Historical Fire Event on Pyrogenic Carbon Stocks and Dissolved Pyrogenic Carbon in Spodosols in Northern Michigan

Santos, Fernanda; Wagner, Sasha; Rothstein, David E.; Jaffé, Rudolf; Miesel, Jessica R.

doi:10.3389/feart.2017.00080

Cited by 21 publications

(14 citation statements)

References 58 publications

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“…In the Altamaha River, ultisols dominate the soil profiles in the upper watershed, while spodosols become abundant in the lower watershed (US Department of Agriculture, ). While direct measurements of DBC in groundwater of this region are unavailable, Santos et al () reported significant leaching of DBC from deep soil horizons consisting primarily of iron‐rich spodosols, which supports a potential mechanism for groundwater transport of DBC in the Altamaha River.…”

Section: Discussionmentioning

confidence: 92%

Hydrological Controls on the Seasonal Variability of Dissolved and Particulate Black Carbon in the Altamaha River, GA

et al. 2018

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Rivers play an important role in the transport of organic carbon from terrestrial to marine environments. A significant portion of this material is black carbon (BC), a residue of incomplete biomass and fossil fuel combustion. BC is mobilized in fluvial systems as both particulate BC (PBC) and dissolved BC (DBC), and the export of BC to coastal environments may have significant implications for carbon cycling in marine environments. However, while little is known regarding the potential connectivity between riverine export of PBC and DBC or the potential importance of such a relationship in constraining future BC budgets, current knowledge suggests that fluvial export of PBC and DBC are decoupled in small fire-impacted watersheds. This study aims to further address this subject on a larger watershed scale. For this study, 13 monthly samples were collected (September 2015 to September 2016) near the mouth of the Altamaha River, Georgia. PBC and DBC were characterized using the benzenze polycarboxylic acid method. Seasonal hydrology and regional shifts in storm events play an important role for both PBC and DBC export during high flow months. The DBC concentrations were comparable among wet and dry seasons, whereas evidence of seasonal salt water intrusions suggests an additional estuarine contribution of PBC at the sampling location. The DBC and PBC fluxes were generally coupled, although this pattern was disrupted during initial storm pulses. While this is the first report of potential coupling between DBC and PBC export, environmental drivers controlling this behavior between DBC and PBC remain to be constrained.

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Section: Discussionmentioning

confidence: 92%

Hydrological Controls on the Seasonal Variability of Dissolved and Particulate Black Carbon in the Altamaha River, GA

et al. 2018

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“…Charcoal left on site likely disintegrates into smaller particles over time further affording incorporation into the mineral soil as a result of physical and biological pedoturbation (DeLuca and Aplet, 2008). This fine particulate C may also leach into deeper soil horizons over time (Santos et al, 2017). The reintroduction of fire using these restoration treatments in the region represents the first potential addition of PyC to these ecosystems over a 100years period.…”

Section: Resultsmentioning

confidence: 99%

“…Insights from that ecosystem led the authors to suggest that fire and PyC generation lead to a long-term decline in soil C. However, this argument does not account for differences in the longevity of stable organic matter and PyC, which may be over 10 times greater for PyC compared to soil organic matter (DeLuca and Aplet, 2008). Further evidence for longevity of PyC in soils and an indication of the limited impact of a single burn event on soil PyC stocks is captured in the recent study by Santos et al (2017) which investigated PyC stocks in litter layers (significantly different from a 100-years postburn site to an unburned site) and dissolved PyC leaching from soil horizons (not significantly different from burned to unburned). At our FFS sites, the lack of differences in mineral soil PyC content across treatments is likely a product of historical fires, including a fire in the 1930's that covered portions of Block 1 and 3 (Gundale et al, 2005), whereas recent fire activity resulted in measurable changes in the O horizon PyC content.…”

Section: Discussionmentioning

confidence: 99%

Pyrogenic Carbon Generation From Fire and Forest Restoration Treatments

DeLuca

Gundale

Brimmer

et al. 2020

Front. For. Glob. Change

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“…Besides, the development of an OC‐rich soil layer is poor (Table ). In addition, the leaching of DBC from the soil has been suggested to depend on the fire history of the basin and thus on the age and composition of the buried charcoal (Santos et al, ). Hence, the influence of hydrology on the magnitude of variations in terrigenous DOM constituents depends on their sources, storage, and distribution within the basin as well as the rainfall regime.…”

Section: Discussionmentioning

confidence: 99%

Different Responses of Dissolved Black Carbon and Dissolved Lignin to Seasonal Hydrological Changes and an Extreme Rain Event

Bao

Niggemann

Huang³

et al. 2019

JGR Biogeosciences

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Hydrology, especially extreme hydrological events, has been recognized as an important driver of the land‐to‐ocean export of terrigenous dissolved organic matter (tDOM). Nevertheless, how various types of tDOM that differ in source and reactivity respond to changes in hydrology is not known. Seasonal and event exports of dissolved organic carbon (DOC), dissolved black carbon (DBC), and dissolved lignin were studied in a small subtropical river. We found that seasonal variations in DBC concentration were significantly related to hydrology, while DOC and dissolved lignin were not. In contrast, DOC, DBC, and dissolved lignin changed similarly during an extreme rain event. The variation magnitudes of DOC, DBC, and dissolved lignin concentrations were in the lower end compared to other rivers, which may be related to the limited coverage of wetlands and riparian vegetation and poor development of organic‐rich soil. Dilution effects were observed when the runoff exceeded 0.4 mm/hr, and the fluxes of both DBC and dissolved lignin decreased during the runoff peak, which was caused by surface flow and potentially by removal processes during peak discharge. Our results suggest that the influence of hydrology varies with tDOM source and reactivity and that high enough runoff (e.g., 0.7 mm/hr in the Jiulong River) may not enhance the export rate of tDOM. However, our study was carried out in a small watershed with limited wetlands and riparian vegetation, and more studies are needed to verify whether this trend is consistent among global rivers.

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Impact of a Historical Fire Event on Pyrogenic Carbon Stocks and Dissolved Pyrogenic Carbon in Spodosols in Northern Michigan

Cited by 21 publications

References 58 publications

Hydrological Controls on the Seasonal Variability of Dissolved and Particulate Black Carbon in the Altamaha River, GA

Hydrological Controls on the Seasonal Variability of Dissolved and Particulate Black Carbon in the Altamaha River, GA

Pyrogenic Carbon Generation From Fire and Forest Restoration Treatments

Different Responses of Dissolved Black Carbon and Dissolved Lignin to Seasonal Hydrological Changes and an Extreme Rain Event

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