Soil carbon dynamics during drying vs. rewetting: Importance of antecedent moisture conditions

Patel, Kaizad; Myers‐Pigg, Allison; Bond‐Lamberty, Ben; Fansler, Sarah; Norris, Cooper; A., McKever, Sophia; Zheng, Jianqiu; Rod, Kenton A.; Bailey, Vanessa

doi:10.1016/j.soilbio.2021.108165

Cited by 34 publications

(19 citation statements)

References 43 publications

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“…Such extreme moisture conditions drive key soil processes in ways we cannot currently predict 3,4 . For example, antecedent moisture conditions have been shown to exert an overwhelming effect on the moisture response of soil carbon dioxide (CO 2 ) fluxes [5][6][7] , including the increased CO 2 fluxes that occur during rewetting [8][9][10] . The mechanisms behind this amplified respiration response, often described as the "Birch effect", remain ill-defined, as this is a complex phenomenon arising from various physicochemical and biochemical destabilization processes that collectively increase microbial oxidation of soil organic carbon (SOC) 9,[11][12][13] .…”

mentioning

confidence: 99%

Soil texture and environmental conditions influence the biogeochemical responses of soils to drought and flooding

Patel

Fansler

Campbell

et al. 2021

Commun Earth Environ

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Climate change is intensifying the global water cycle, with increased frequency of drought and flood. Water is an important driver of soil carbon dynamics, and it is crucial to understand how moisture disturbances will affect carbon availability and fluxes in soils. Here we investigate the role of water in substrate-microbe connectivity and soil carbon cycling under extreme moisture conditions. We collected soils from Alaska, Florida, and Washington USA, and incubated them under Drought and Flood conditions. Drought had a stronger effect on soil respiration, pore-water carbon, and microbial community composition than flooding. Soil response was not consistent across sites, and was influenced by site-level pedological and environmental factors. Soil texture and porosity can influence microbial access to substrates through the pore network, driving the chemical response. Further, the microbial communities are adapted to the historic stress conditions at their sites and therefore show site-specific responses to drought and flood.

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confidence: 99%

Soil texture and environmental conditions influence the biogeochemical responses of soils to drought and flooding

Patel

Fansler

Campbell

et al. 2021

Commun Earth Environ

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“…The initial stage of incubation exhibited transient immobilization in some treatments, which can be attributed to the soil manipulations such as the drying and rewetting of soil prior to the commencement of the experiment [38,[52][53][54][55]. Particularly observed for a longer duration of 60 days in CAN, such transitory immobilization of N in soil has been observed in general in studies conducted in a similar experimental set-up [38,56,57].…”

Section: Soil N Dynamics Assessmentmentioning

confidence: 66%

Digestate-Derived Ammonium Fertilizers and Their Blends as Substitutes to Synthetic Nitrogen Fertilizers

et al. 2022

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Nutrient recovery from biomass streams generates novel recycling-derived fertilizers (RDFs). The effect of RDFs depends on their nutrient content and variability, which can aid or hinder their use by end-users. Detailed characterization of RDFs can help in evaluating product properties, whereas blending RDFs can optimize their nutrient ratios and reduce nutrient variability. This study assesses ammonium nitrate (AN) from stripping-scrubbing, ammonium water (AW) and concentrate (CaE) from evaporation, and two tailor-made blends (AN + CaE and AW + CaE), for their potential as nitrogen (N) fertilizers in the pot cultivation of lettuce. Parallelly, a soil incubation experiment was conducted to investigate the N release dynamics of the tested RDFs. The RDFs were compared against the commercial calcium ammonium nitrate (CAN) and an unfertilized control. AN and AW fertilization resulted in a similar crop yield and N uptake to the CAN treatment. CaE and blends exhibited poor yield and N uptake, possibly due to the sodium toxicity detected. AN and AW displayed N fertilizer replacement values above 100%, whereas CaE and blends exhibited poor results in the current experiments. The soil incubation experiment showed a positive soil priming effect in AN and AW treatment, as their N release was over 100%. Further research under uncontrolled field conditions utilizing AN and AW for diverse crop types can validate their N replacement potential.

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“…Additionally, these results were mirrored in stream water, albeit not surprising, given previous work connecting surface water chemistry to surrounding soil type in stream catchments (LoRusso et al., 2020; Zimmer et al., 2013). Repeated wetting and drying cycles in these soils has also been shown to drive OM mobilization and mineralization (Patel et al., 2021), through shifts toward aluminum dominated interactions (Possinger et al., 2020), as well as through the connection of connect labile carbon to microbial communities within soil pore systems leading to further processing (Bailey et al., 2017; Kravchenko et al., 2021). These observations suggest that first order stream catchments play a significant role as carbon sources to downstream water quality (Raymond et al., 2016).…”

Section: Discussionmentioning

confidence: 99%

“…Intense hydrologic events can facilitate the transport of fresh, lignin‐like DOM deeper into soils or to streams via bypass soil flow paths (Fröberg et al., 2007; Raymond et al., 2016). At the landscape scale, soils in forested headwater catchments that experience frequent and fluctuating water tables have been found to be zones of carbon accumulation, especially within lower mineral soils where illuvial organic carbon is high but overall dissolved organic carbon (DOC) is low (Bailey et al., 2014; Patel et al., 2021; Possinger et al., 2020). Additional work has shown that during the wetting events, anoxic conditions promote increases in soil CO 2 , N 2 O, and CH 4 (Werner & Gessler, 2011).…”

Section: Introductionmentioning

confidence: 99%

Dissolved Organic Matter Dynamics in Reference and Calcium Silicate‐Treated Watersheds at Hubbard Brook Experimental Forest, NH, USA

et al. 2021

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Dissolved organic matter (DOM) plays a critical role in the transfer of energy and nutrients within and between terrestrial and aquatic ecosystems (Jaffé et al., 2008). Soils have the capacity to store considerably more carbon than quantities found in either the atmosphere or plant biomass (Schmidt et al., 2011). A fraction of soil carbon is mobilized as DOM to drainage waters, making it one of the largest sources of organic carbon to freshwater and marine ecosystems (Battin et al., 2008).

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Soil carbon dynamics during drying vs. rewetting: Importance of antecedent moisture conditions

Cited by 34 publications

References 43 publications

Soil texture and environmental conditions influence the biogeochemical responses of soils to drought and flooding

Soil texture and environmental conditions influence the biogeochemical responses of soils to drought and flooding

Digestate-Derived Ammonium Fertilizers and Their Blends as Substitutes to Synthetic Nitrogen Fertilizers

Dissolved Organic Matter Dynamics in Reference and Calcium Silicate‐Treated Watersheds at Hubbard Brook Experimental Forest, NH, USA

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