Carbon losses from prolonged arable cropping of Plinthosols in Southwest Burkina Faso

Hounkpatin, Ozias; Welp, Gerhard; Rosendahl, Ingrid; Amelung, Wulf

doi:10.1016/j.still.2017.08.014

Cited by 15 publications

(2 citation statements)

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“…They increased with Al d , Fe d , Al o , Fe o , Al p , and Fe p , with the proportions of variance explained ( r 2 ) ranging from 0.2 to 0.7 (Figure ). To examine whether the correlations of SOC and Al/Fe‐(hydr) oxides observed in Tibetan alpine grasslands are general, we collected literature data of SOC and Al/Fe‐(hydr) oxides in temperate and tropical ecosystems (Hounkpatin et al, ; Huang et al, ; Porras et al, ; Souza et al, ; Wagai & Mayer, ; Ye et al, ; Q. Zhao et al, ; J. Zhao et al, ) and found that the positive associations observed in Tibetan alpine grasslands also held true at global scale (Figures a–f). The results of partial correlation analyses further confirmed the effects of mineral variables on SOC content.…”

Section: Resultsmentioning

confidence: 99%

“…To explore potential differences in the degree of mineral protection among different climate zones, we synthesized the data from alpine grasslands (this study), temperate ecosystems (Wilson et al, ; Q. Zhao et al, ), and tropical‐subtropical ecosystems (Basile‐Doelsch et al, ; Hounkpatin et al, ; Wagai & Mayer, , Figure ). In total, we collected 49 independent sites (including 13 sites in temperate ecosystems and 36 sites in tropical‐subtropical ecosystems), with an average topsoil depth of 14 cm.…”

Section: Resultsmentioning

confidence: 99%

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Al/Fe Mineral Controls on Soil Organic Carbon Stock Across Tibetan Alpine Grasslands

Fang,

Qin,

Chen

et al. 2019

JGR Biogeosciences

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Adequate understanding of the controlling factors of soil carbon (C) stock is crucial for improving the predictability of Earth System Models in exploring terrestrial C-climate feedback. Current studies, however, mainly focus on climatic and edaphic variables and rarely explore the effects of mineral protection in regulating soil organic carbon (SOC) stock over broad geographic scale. Particularly, the relative importance of mineral protection compared with other factors is unclear. Based on large-scale soil inventory, here we filled this knowledge gap by exploring the effects of Al/Fe-(hydr) oxides on SOC and three C fractions across Tibetan alpine grasslands via linear regression, partial correlation, and variance partitioning analyses, and also by comparing the degree of mineral protection in alpine grasslands with other ecosystems. Our results showed that SOC and C fractions across Tibetan alpine grasslands were regulated by Al/Fe-(hydr) oxides, with the incorporation of mineral variables increasing the explained variations by 10.1% for SOC content, 13.4% for coarse particulate organic matter, 12.6% for microaggregate associated C, and 21.9% for silt and clay associated C. Moreover, the contribution of mineral effects exceeded that of climatic and edaphic factors, particularly in the silt and clay associated C fraction. In addition, about 15.8 ± 12.0% of SOC pools were associated with Fe, which was equal to or higher than those in temperate and tropical-subtropical ecosystems. Taken together, these results demonstrate the significant role of Al/Fe minerals in the stabilization of SOC across Tibetan alpine grasslands, highlighting the importance of incorporating C-mineral interactions into ESMs for better understanding the terrestrial C-climate feedback.

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