Vegetation controls on soil organic carbon dynamics in an arid, hyperthermic ecosystem

White, David A.; Welty-Bernard, Amy; Rasmussen, Craig; Schwartz, Egbert

doi:10.1016/j.geoderma.2009.02.011

Cited by 30 publications

(17 citation statements)

References 77 publications

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“…Recent studies have reported that the soil organic carbon (SOC) content is significantly influenced by land-use [32][33][34], and our results at the four research plots (Table 1) concur with the published data. Chaplot et al [35] recorded significantly higher SOC contents in forest soil than in fallow and cultivated soils.…”

Section: Discussionsupporting

confidence: 91%

The Impact of Land-Use on the Hierarchical Pore Size Distribution and Water Retention Properties in Loamy Soils

Dlapa

Hriník

Hrabovský

et al. 2020

Water

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Soil hydraulic properties are very sensitive to land-use in regions susceptible to physical degradation. Intensive agricultural practices often lead to soil compaction and erosion in the investigated area. The main goal of this paper was to evaluate the impact of land-use on the pore size distribution and water retention in loamy soils. The soil water retention curve (SWRC) combined the total porosity and the water retention of the undisturbed sample at 3, 10, 31, 100, 310, and 1000 hPa suctions and the disturbed sample at 1.5 MPa. The triple-exponential model approximated the curve's course, and its derivative defined the distinct macro-, structural, and textural pore maxima, with characteristic suctions corresponding to SWRC inflection points. The soil organic carbon content had the greatest influence on the content of all three pore classes. The water retention properties followed the hierarchical pore size distribution in the four research plots and decreased in the identical orchard > forest > grassland > arable soil order. These results show that the orchard and forest areas are the most appropriate land uses with respect to porosity and water retention, while the grassland has not fully recovered after its conversion from arable soil and remains relatively poor, and the arable soil properties are the worst.

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Section: Discussionsupporting

confidence: 91%

The Impact of Land-Use on the Hierarchical Pore Size Distribution and Water Retention Properties in Loamy Soils

Dlapa

Hriník

Hrabovský

et al. 2020

Water

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“…The structure was preserved and the water flow greater, due to the higher number of macropores. Another factor possibly related to the number of fibers is the type of vegetation that contributes to the formation of soil organic matter (White II et al, 2009), which will be discussed together with the δ 13 C isotopic signals.…”

Section: Morphological and Physical Propertiesmentioning

confidence: 99%

Pedological and isotopic relations of a highland tropical peatland, Mountain Range of the Espinhaço Meridional (Brazil)

Horák

Vidal‐Torrado

Silva

et al. 2011

Rev. Bras. Ciênc. Solo

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The evolution of organic matter sources in soil is related to climate and vegetation dynamics in the past recorded in paleoenvironmental Quaternary deposits such as peatlands. For this reason, a Histosol of the mineralotrophic peatland from the Pau-de-Fruta Special Protection Area -SPA, Espinhaço Meridional, State of Minas Gerais, was described and characterized to evidence the soil constituent materials and properties as related to changes in environmental conditions, supported by the isotopic and elementary characterization of soil C and N and 14 C ages. Samples were collected in a depression at 1,350 m asl, where Histosols are possibly more developed due to the great thickness (505 cm). Nowadays, the area is colonized by vegetation physiognomies of the Cerrado Biome, mainly rocky and wet fields (Campo Rupestre and Campo Úmido), aside from fragments of Semidecidual Seasonal Forest, called Capões forests. The results this study showed that early the genesis of the analyzed soil profile showed a high initial contribution of mostly herbaceous organic matter before 8,090 ± 30 years BP ( 14 C age). In the lower-mid Holocene, between 8,090 ± 30 years AP ( 14 C age) to ± 4,100 years BP (interpolated age), the vegetation gradually became more woody, with forest expansion, possibly due to increased humidity, suggesting the existence of a more woody Cerrado in the past than at present. Drier climate conditions than the current were concluded ± 2,500 years BP (interpolated age) and that after 430 years BP ( 14 C age) the forest gave way to grassland, predominantly. After the dry season, humidity increased to the current conditions. Due to these climate

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“…The labile fraction of the SOM is the most sensible and first to be mineralized (Haynes 2000) and can be used as an early indicator in short time periods; therefore, some scientists has used this fraction as index of SOM (Haynes 2000). On the other hand, litter chemistry and quality vary with vegetation type and likely control rates of litter decomposition and accumulation of SOC (White II et al 2009). Furthermore, Vaieretti et al (2005) and Gallardo and Merino (1993) found good correlation between vegetation type and rates of litter decomposition in semiarid ecosystems.…”

Section: Introductionmentioning

confidence: 99%

Degradability of soils under oak and pine in Central Spain

2009

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The purpose of this research was to study the influence of the vegetation on the soil C pool of forests of pines (Pinus sylvestris) and oaks (Quercus pyrenaica), located in Central-Western Spain. Horizons from selected soils located in these forests were sampled, and the soil organic C (SOC) was determined. In addition, in vitro incubation experiments were carried out, under controlled conditions, to monitor the stability of SOC against the microbial activity. Soil humus fractions were isolated following a classical procedure of chemical fractionation using alkaline solutions, before and after the incubation experiment. A deeper O horizon was found under the pine forest than under oak one; however, higher SOC content was found in the oak site than that under pine one. During the in vitro mineralization process, a lower CO 2 production by the soil sample from pine forest was observed, in relation to that emitted by the oak soil. In addition, a lower humification degree was estimated for the soil humus under pines than for that under oaks. In conclusion, replacement of oaks by pines produced a decrease in SOC accumulation and a lower quality of humus in the forest soils.

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Vegetation controls on soil organic carbon dynamics in an arid, hyperthermic ecosystem

Cited by 30 publications

References 77 publications

The Impact of Land-Use on the Hierarchical Pore Size Distribution and Water Retention Properties in Loamy Soils

The Impact of Land-Use on the Hierarchical Pore Size Distribution and Water Retention Properties in Loamy Soils

Pedological and isotopic relations of a highland tropical peatland, Mountain Range of the Espinhaço Meridional (Brazil)

Degradability of soils under oak and pine in Central Spain

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