The effects of salinization on aerobic and anaerobic decomposition and mineralization in peat meadows: The roles of peat type and land use

Brouns, Karlijn; Verhoeven, Jos T. A.; Hefting, Mariet M.

doi:10.1016/j.jenvman.2014.04.009

Cited by 30 publications

(11 citation statements)

References 60 publications

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“…Several experiments have shown that soil salinity is a key regulating factor of N mineralization in coastal ecosystems (Fang et al ., ; Noe et al ., ; Brouns et al ., ). Noe et al .…”

Section: Introductionmentioning

confidence: 99%

“…Several experiments have shown that soil salinity is a key regulating factor of N mineralization in coastal ecosystems (Fang et al, 2005;Noe et al, 2013;Brouns et al, 2014). Noe et al (2013) found that N mineralization in a tidal freshwater forested wetland was stimulated by increasing salinity from 0.1 to 3.5 parts per thousand (ppt), which was likely because of plant stress, accelerated senescence and related additional plant biomass input to the soil.…”

Section: Introductionmentioning

confidence: 99%

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A meta‐analysis of soil salinization effects on nitrogen pools, cycles and fluxes in coastal ecosystems

Zhou

Butterbach‐Bahl

Vereecken

et al. 2016

Global Change Biology

167

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Salinity intrusion caused by land subsidence resulting from increasing groundwater abstraction, decreasing river sediment loads and increasing sea level because of climate change has caused widespread soil salinization in coastal ecosystems. Soil salinization may greatly alter nitrogen (N) cycling in coastal ecosystems. However, a comprehensive understanding of the effects of soil salinization on ecosystem N pools, cycling processes and fluxes is not available for coastal ecosystems. Therefore, we compiled data from 551 observations from 21 peer-reviewed papers and conducted a meta-analysis of experimental soil salinization effects on 19 variables related to N pools, cycling processes and fluxes in coastal ecosystems. Our results showed that the effects of soil salinization varied across different ecosystem types and salinity levels. Soil salinization increased plant N content (18%), soil NH (12%) and soil total N (210%), although it decreased soil NO (2%) and soil microbial biomass N (74%). Increasing soil salinity stimulated soil N O fluxes as well as hydrological NH and NO fluxes more than threefold, although it decreased the hydrological dissolved organic nitrogen (DON) flux (59%). Soil salinization also increased the net N mineralization by 70%, although salinization effects were not observed on the net nitrification, denitrification and dissimilatory nitrate reduction to ammonium in this meta-analysis. Overall, this meta-analysis improves our understanding of the responses of ecosystem N cycling to soil salinization, identifies knowledge gaps and highlights the urgent need for studies on the effects of soil salinization on coastal agro-ecosystem and microbial N immobilization. Additional increases in knowledge are critical for designing sustainable adaptation measures to the predicted intrusion of salinity intrusion so that the productivity of coastal agro-ecosystems can be maintained or improved and the N losses and pollution of the natural environment can be minimized.

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“…Several experiments have shown that soil salinity is a key regulating factor of N mineralization in coastal ecosystems (Fang et al ., ; Noe et al ., ; Brouns et al ., ). Noe et al .…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A meta‐analysis of soil salinization effects on nitrogen pools, cycles and fluxes in coastal ecosystems

Zhou

Butterbach‐Bahl

Vereecken

et al. 2016

Global Change Biology

167

View full text Add to dashboard Cite

show abstract

“…On the other hand, contradictory results have been obtained for the effects of salinity/alkalinity on soil respiration. Marton et al [42] and Chambers et al [13] found that soil respiration increased with seawater intrusion, which perhaps may be due to the contribution of sulfate reduction to the microbial respiration and carbon mineralization [43]. Moreover, Wong et al [44] found that carbon mineralization increased with increasing salinity.…”

Section: Discussionmentioning

confidence: 98%

Soil Respiration from Different Halophytic Plants in Coastal Saline-Alkali Soils

Li¹,

Liu²

2020

Pol. J. Environ. Stud.

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Soil salinity is a crucial constraint in the potential utilization of land resources in the coastal regions of northern China [1]. Most of the lands within these areas are covered with salinized soil and are accompanied by shallow underground water [2]. Excess salinity and alkalinity plagued seed germination and plant growth, and led to environmental degradation [3]. In order to improve these conditions, local governments have launched costal ecological restoration projects, including planting halophytes, to recover degraded vegetation and reduce soil salinization. Halophytic plants can grow well and produce high biomass in saline environments

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“…However, peat samples undergoing the SULF0, SULF100, SULF700, and SULF2700 treatment exhibited no pronounced SO 4 2− reduction, hence Ardón et al (2016) conclusion cannot be considered as the cause for the observed differences in DOC/DIC/TDN between the treatments. Instead, minor differences observed in DOC release from the different SO 4 2− treatments may be attributed to anion exchange of DOM anions by SO 4 2− (Brouns et al, 2014). An increased dispersion of organic matter caused by a replacement of calcium (Ca 2+ ) by Na + (e.g., Edelstein et al, 2010) is considered unlikely as increased Ca 2+ concentrations were observed in effluent immediately after the start of the SO 4 2− treatments (see segment about cation-related processes below).…”

Section: Effect Of Sulfate Concentrationmentioning

confidence: 95%

Sulfate Mobility in Fen Peat and Its Impact on the Release of Solutes

Gosch

Townsend

Kreuzburg

et al. 2019

Front. Environ. Sci.

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Sea-level rise coupled with land subsidence from wetland drainage exposes increasingly large areas of coastal peatlands to seawater intrusion. Seawater contains high concentrations of sulfate (SO 4 2−), which can alter the decomposition of organic matter thereby releasing organic and inorganic solutes from peat. In this study, a flow-through reactor system was used in order to examine the transport of SO 4 2− through peat as well as its effect on solute release. Moderately-decomposed fen peat samples received input solutions with SO 4 2− concentrations of 0, 100, 700, and 2,700 mg L −1 ; sample effluent was analyzed for a variety of geochemical parameters including dissolved organic carbon (DOC), dissolved inorganic carbon (DIC) and total dissolved nitrogen (TDN) as well as the concentrations of major cations and anions. The input solution remained anoxic throughout the experiment; however, no signs of a pronounced SO 4 2− reduction were detected in the effluent. SO 4 2− transport in the fen peat resembled non-reactive bromide (Br −) transport, indicating that in the absence of SO 4 2− reduction the anion may be considered a conservative tracer. However, slightly elevated concentrations of DOC and TDN, associated with raised SO 4 2− levels, suggest the minor desorption of organic acids through anion exchange. An increased solute release due to stimulated decomposition processes, including SO 4 2− reduction, was observed for samples with acetate as an additional marine carbon source included in their input solution. The solute release of peats with different degrees of decomposition differed greatly under SO 4 2−-enriched conditions where strongly-decomposed fen peat samples released the highest concentrations of DOC, DIC and TDN.

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The effects of salinization on aerobic and anaerobic decomposition and mineralization in peat meadows: The roles of peat type and land use

Cited by 30 publications

References 60 publications

A meta‐analysis of soil salinization effects on nitrogen pools, cycles and fluxes in coastal ecosystems

A meta‐analysis of soil salinization effects on nitrogen pools, cycles and fluxes in coastal ecosystems

Soil Respiration from Different Halophytic Plants in Coastal Saline-Alkali Soils

Sulfate Mobility in Fen Peat and Its Impact on the Release of Solutes

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