Soil organic matter dynamics along a rice chronosequence in north-eastern Argentina: Evidence from natural 13C abundance and particle size fractionation

Desjardins, Thierry; Folgarait, Patricia J.; Pando‐Bahuon, Anne; Girardin, Cyril; Lavelle, Patrick

doi:10.1016/j.soilbio.2006.04.029

Cited by 29 publications

(17 citation statements)

References 27 publications

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“…The inclusion of SOC in soil aggregates and the mineralisation of SOC in broken aggregates are accompanied by changes in the chemical structure of SOC. These processes have been studied with the aid of δ 13 C analysis (Buzek et al, 2009;Desjardins et al, 1994Desjardins et al, , 2004Desjardins et al, , 2006Wookey et al, 2002).…”

Section: Introductionmentioning

confidence: 99%

Carbon dynamics of soil organic matter in bulk soil and aggregate fraction during secondary succession in a Mediterranean environment

et al. 2013

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Section: Introductionmentioning

confidence: 99%

Carbon dynamics of soil organic matter in bulk soil and aggregate fraction during secondary succession in a Mediterranean environment

et al. 2013

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“…In coastal wetlands, the upper part of intertidal areas seems to contain more fine soil fractions than the lower part due to the ability of vegetation to weaken hydrodynamic forces and trap fine sediments (Wang et al, ). The positive effect of fine soil fractions on stabilizing soil carbon may be via the mineral protection of soil organic matter (Desjardins et al, ).…”

Section: Discussionmentioning

confidence: 99%

Interacting Effects of Plant Invasion, Climate, and Soils on Soil Organic Carbon Storage in Coastal Wetlands

Yang

2019

JGR Biogeosciences

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Coastal wetland soils store large amounts of organic carbon, which is becoming vulnerable to environmental changes such as exotic species invasion and climate change. Soil organic carbon (SOC) is also related to soil biogeochemical factors. To understand the mechanisms of these changes in regulating SOC, it is necessary to characterize the direct and indirect effects of exotic species invasion, climate, and soil variables on SOC. We used a structural equation model to identify the key driving mechanisms of SOC storage to a depth of 1 m at 15 sites on the East China coast, where Spartina alterniflora Loisel. (S. alterniflora) invasion has significantly influenced SOC storage. The model revealed several patterns that are expected to explain the enhanced SOC storage. Spartina alterniflora invasion had a direct effect on SOC storage mainly due to its impacts on biomass production. Temperature had an important influence on SOC storage and the subsurface SOC content. SOC storage was also related to the interacting effects of S. alterniflora invasion and soil biogeochemical properties such as soil salinity, fine soil fraction, and bulk density. The relative contribution of SOC in the topsoil to SOC storage at a depth of 1 m decreased over time, while the contribution increased for the SOC below the surface. These results highlight the interactions among S. alterniflora invasion, climate, and soil properties in regulating SOC dynamics. Our results imply that the relative importance of vertical patterns to SOC storage associated with S. alterniflora invasion and temperature fluctuations will change over time.Plain Language Summary The world's largest invasion of S. alterniflora is occurring in the coastal wetlands of China. Coastal wetland soils, which are vulnerable to exotic species invasions, contain large amounts of organic carbon. The controlling mechanisms of soil organic carbon (SOC) associated with S. alterniflora invasion and climate change may be complex due to the interrelationships that exist among ecological factors. In our study, we investigated the effects of plant invasion, climate, and soils on SOC storage and its vertical distribution. We found that SOC storage was enhanced over time. Spartina alterniflora invasion had a direct effect on SOC storage mainly due to its impacts on biomass production. Temperature had an important influence on SOC storage and the subsurface SOC content. The interacting effects of S. alterniflora invasion and soil biogeochemical properties such as soil salinity, fine soil fractions, pH, and bulk density were also identified as having crucial impacts on SOC storage. Our results suggest an interesting possibility that the relative contribution of vertical patterns to the SOC pool is likely to change over the invasion period. Citation: Yang, R.-M. (2019). Interacting effects of plant invasion, climate, and soils on soil organic carbon storage in coastal wetlands.

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“…The estimation of soil C storage was complemented with the calculation of organic matter turnover rates, because according to Solomon et al (2002) and Desjardins et al (2006), the change in land use alters the speed at which the organic molecules oxidized, therefore affecting its accumulation and mineralization. Oelbermann and Voroney (2007) assert that those turnover rates are key to understanding the dynamics of terrestrial carbon and may even allow the C flow between soil and atmosphere to be calculated at a given moment.…”

Section: Discussionmentioning

confidence: 99%

Soil organic carbon storage and dynamics after C3-C4 and C4-C3 vegetation changes in sub-Andean landscapes of Colombia

Carvajal

Feijoo

Quintero

et al. 2013

Chilean J. Agric. Res.

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he soil C capture capacity and organic matter turnover rate vary according to photosynthetic pathways; therefore the evaluation of C at sites suffering changes from Cj to C4 vegetation and vice versa, is important to identify impacts of land use change on C cycle. This study aims to evaluate C storage under different land uses, and soil C dynamics using the "C technique to identify the origin of soil C. In the Municipality of Alcalá, Department of Valle del Cauca, Colombia, the natural abundance of ô"C was estimated, and data on land use history were gathered to calculate the organic matter turnover rate. The contribution of each type of vegetation to total percentage organic C and to storage at 0.30 m was estimated at sites suffering changes from C, to C4 vegetation and vice versa. Average ô''C ranged between -25.79 and -20.72%o at the three depths evaluated. Over a period of 13 yr, mature fallow lands replaced more than 70% of the C fixed by pastures over a period of 60 yr, whereas paddocks, over a period of 17 yr, only managed to replace 37.9% of the C fixed by associated coffee plantations during a period of 50-100 years. We conclude that the use of ' -' ' C avoided that C storage would have been attributed to current land uses when they are actually fixed by previous vegetation; and that C deposit from C.i vegetation is recalcitrant, while that corresponding to C4 vegetation has a relatively fast turnover rate.

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Soil organic matter dynamics along a rice chronosequence in north-eastern Argentina: Evidence from natural 13C abundance and particle size fractionation

Cited by 29 publications

References 27 publications

Carbon dynamics of soil organic matter in bulk soil and aggregate fraction during secondary succession in a Mediterranean environment

Carbon dynamics of soil organic matter in bulk soil and aggregate fraction during secondary succession in a Mediterranean environment

Interacting Effects of Plant Invasion, Climate, and Soils on Soil Organic Carbon Storage in Coastal Wetlands

Soil organic carbon storage and dynamics after C3-C4 and C4-C3 vegetation changes in sub-Andean landscapes of Colombia

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