Effects of environmental and biotic factors on carbon isotopic fractionation during decomposition of soil organic matter

Wang, Guoan; Jia, Yufu; Li, Wei

doi:10.1038/srep11043

Cited by 64 publications

(43 citation statements)

References 53 publications

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“…, Wang et al. ), and even slight fractionation due to microbial activity and soil‐respired CO 2 could accumulate into observable increases in soil δ 13 C over decades (Högberg et al. ).…”

Section: Discussionmentioning

confidence: 99%

Urban soil carbon and nitrogen converge at a continental scale

Trammell

Pataki

Pouyat

et al. 2020

Ecological Monographs

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In urban areas, anthropogenic drivers of ecosystem structure and function are thought to predominate over larger‐scale biophysical drivers. Residential yards are influenced by individual homeowner preferences and actions, and these factors are hypothesized to converge yard structure across broad scales. We examined soil total C and total δ13C, organic C and organic δ13C, total N, and δ15N in residential yards and corresponding reference ecosystems in six cities across the United States that span major climates and ecological biomes (Baltimore, Maryland; Boston, Massachusetts; Los Angeles, California; Miami, Florida; Minneapolis‐St. Paul, Minnesota; and Phoenix, Arizona). Across the cities, we found soil C and N concentrations and soil δ15N were less variable in residential yards compared to reference sites supporting the hypothesis that soil C, N, and δ15N converge across these cities. Increases in organic soil C, soil N, and soil δ15N across urban, suburban, and rural residential yards in several cities supported the hypothesis that soils responded similarly to altered resource inputs across cities, contributing to convergence of soil C and N in yards compared to natural systems. Soil C and N dynamics in residential yards showed evidence of increasing C and N inputs to urban soils or dampened decomposition rates over time that are influenced by climate and/or housing age across the cities. In the warmest cities (Los Angeles, Miami, Phoenix), greater organic soil C and higher soil δ13C in yards compared to reference sites reflected the greater proportion of C4 plants in these yards. In the two warm arid cities (Los Angeles, Phoenix), total soil δ13C increased and organic soil δ13C decreased with increasing home age indicating greater inorganic C in the yards around newer homes. In general, soil organic C and δ13C, soil N, and soil δ15N increased with increasing home age suggesting increased soil C and N cycling rates and associated 12C and 14N losses over time control yard soil C and N dynamics. This study provides evidence that conversion of native reference ecosystems to residential areas results in convergence of soil C and N at a continental scale. The mechanisms underlying these effects are complex and vary spatially and temporally.

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Section: Discussionmentioning

confidence: 99%

Urban soil carbon and nitrogen converge at a continental scale

Trammell

Pataki

Pouyat

et al. 2020

Ecological Monographs

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“…Montane ecosystems provide good habitats to examine the interactions of above-and below-ground responses of organisms to environmental stress gradients (Bryant et al, 2008). The Tibetan plateau is the highest plateau worldwide and has unique habitats characterized by harsh climatic conditions including low temperatures, dry air, high UV, and low oxygen (He et al, 2006;Wang et al, 2015). Few investigations have focused on the adaptation of AM fungal associations under such stressful temperature conditions at high elevations in contrast to the numerous studies on relatively warm environments (Staddon et al, 2002;Hawkes et al, 2008;Kivlin et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Temperature‐mediated local adaptation alters the symbiotic function in arbuscular mycorrhiza

Yang

Cai

et al. 2017

Environmental Microbiology

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Variation in the symbiotic function of arbuscular mycorrhizal fungi (AM fungi) has been demonstrated among distinct biotic and abiotic interactions. However, there is little knowledge on how local temperature conditions influence the functional divergence of AM symbionts in alpine ecosystems. Here, we conduct a reciprocal inoculation experiment to explore the three-way interactions among plants, AM fungal inoculum and temperature at sites of contrasting elevation. Evidence of local adaptation of plant growth was found only under low temperature conditions, with no consistent local versus foreign effect found in AM fungal performance. The origin of either the plant or the inoculum relative to the temperature was important in explaining symbiotic function. Specifically, when inoculum and temperature were sympatric but allopatric to the plant, poor adaptation by the plant to the novel environment was clearly found under both temperature conditions. Further analysis found that the symbiotic function was inversely related to fungal diversity under high temperature conditions. These results suggest that local adaptation represents a powerful factor in the establishment of novel combinations of plant, inoculum and temperature, and confirms the importance of taking into account both biotic and abiotic interactions in the prediction of the response of symbionts to global environmental change.

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“…tation, numerous other factors such as temperature, air pressure, atmospheric CO 2 concentration, altitude, latitude, and longitude may also influence δ 13 C in plants (Körner et al, 1991;Hultine and Marshall, 2000;Zhu et al, 2010;Xu et al, 2015). Although variation patterns of plant δ 13 C with respect to temperature are so far unresolved (e.g., Schleser et al, 1999;McCarroll and Loader, 2004;Treydte et al, 2007;Wang et al, 2013), it is widely accepted that temperature has a slight effect on plant δ 13 C. Therefore, if the 13 C enrichment during soil organic matter decomposition is a constant value, we expect only a slight or no influence of temperature on soil δ 13 C. However, 13 C-enrichment is affected by environmental and biotic factors (Wang et al, 2015). Thus, it is difficult to determine whether or how temperature affects soil δ 13 C, and there should be specific investigations focusing Note: MAT, SMT, MAP, Alt, Lat.…”

Section: Introductionmentioning

confidence: 99%

Temperature exerts no influence on organic matter <i>δ</i><sup>13</sup>C of surface soil along the 400 mm isopleth of mean annual precipitation in China

et al. 2016

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Abstract. Soil organic carbon is the largest pool of carbon in the terrestrial ecosystem, and its isotopic composition is affected by a number of factors. However, the influence of environmental factors, especially temperature, on soil organic carbon isotope values (δ13CSOM) is poorly constrained. This impedes the application of the variability of organic carbon isotopes to reconstructions of paleoclimate, paleoecology, and global carbon cycling. Given the considerable temperature gradient along the 400 mm isohyet (isopleth of mean annual precipitation – MAP) in China, this isohyet provides ideal experimental sites for studying the influence of temperature on soil organic carbon isotopes. In this study, the effect of temperature on surface soil δ13C was assessed by a comprehensive investigation of 27 sites across a temperature gradient along the isohyet. Results demonstrate that temperature does not play a role in soil δ13C. This suggests that organic carbon isotopes in sediments cannot be used for paleotemperature reconstruction and that the effect of temperature on organic carbon isotopes can be neglected in the reconstruction of paleoclimate and paleovegetation. Multiple regressions with MAT (mean annual temperature), MAP, altitude, latitude, and longitude as independent variables and δ13CSOM as the dependent variable show that these five environmental factors together account for only 9 % of soil δ13C variance. However, one-way ANOVA analyses suggest that soil type and vegetation type are significant factors influencing soil δ13C. Multiple regressions, in which the five aforementioned environmental factors were taken as quantitative variables, and vegetation type, soil type based on the Chinese Soil Taxonomy, and World Reference Base (WRB) soil type were separately used as dummy variables, show that 36.2, 37.4, and 29.7 %, respectively, of the variability in soil δ13C are explained. Compared to the multiple regressions in which only quantitative environmental variables were introduced, the multiple regressions in which soil and vegetation were also introduced explain more of the isotopic variance, suggesting that soil type and vegetation type exert a significant influence on δ13CSOM.

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Effects of environmental and biotic factors on carbon isotopic fractionation during decomposition of soil organic matter

Cited by 64 publications

References 53 publications

Urban soil carbon and nitrogen converge at a continental scale

Urban soil carbon and nitrogen converge at a continental scale

Temperature‐mediated local adaptation alters the symbiotic function in arbuscular mycorrhiza

Temperature exerts no influence on organic matter <i>δ</i><sup>13</sup>C of surface soil along the 400 mm isopleth of mean annual precipitation in China

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Effects of environmental and biotic factors on carbon isotopic fractionation during decomposition of soil organic matter

Cited by 64 publications

References 53 publications

Urban soil carbon and nitrogen converge at a continental scale

Urban soil carbon and nitrogen converge at a continental scale

Temperature‐mediated local adaptation alters the symbiotic function in arbuscular mycorrhiza

Temperature exerts no influence on organic matter &lt;i&gt;δ&lt;/i&gt;&lt;sup&gt;13&lt;/sup&gt;C of surface soil along the 400 mm isopleth of mean annual precipitation in China

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Temperature exerts no influence on organic matter <i>δ</i><sup>13</sup>C of surface soil along the 400 mm isopleth of mean annual precipitation in China