Three-source partitioning of soil respiration by 13C natural abundance and its variation with soil depth in a plantation

Song, Wenchen; Tong, Xiaochong; Zhang, Jinsong; Meng, Ping

doi:10.1007/s11676-015-0206-x

Cited by 12 publications

(8 citation statements)

References 39 publications

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“…Hastened microbial metabolic processes due to warming are projected to result in net global reductions in SOC storage [179]. Moreover, in some forest ecosystems, warming-induced increases in primary production and rhizodeposition could result in priming effects, further decreasing SOC stocks for decades, particularly in deeper soil layers [33,[110][111][112]132,[138][139][140]180]. On the other hand, given the pivotal role that microorganisms play in SOC cycling-that is, increasing the solubility and potential for protection of organic C compounds [2,18,19]-warming and increased belowground C inputs could potentially lead toward greater opportunities for SOC protection and long-term storage [164].…”

Section: Forest Soilsmentioning

confidence: 99%

The Case for Digging Deeper: Soil Organic Carbon Storage, Dynamics, and Controls in Our Changing World

2019

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Most of our terrestrial carbon (C) storage occurs in soils as organic C derived from living organisms. Therefore, the fate of soil organic C (SOC) in response to changes in climate, land use, and management is of great concern. Here we provide a unified conceptual model for SOC cycling by gathering the available information on SOC sources, dissolved organic C (DOC) dynamics, and soil biogeochemical processes. The evidence suggests that belowground C inputs (from roots and microorganisms) are the dominant source of both SOC and DOC in most ecosystems. Considering our emerging understanding of SOC protection mechanisms and long-term storage, we highlight the present need to sample (often ignored) deeper soil layers. Contrary to long-held biases, deep SOC—which contains most of the global amount and is often hundreds to thousands of years old—is susceptible to decomposition on decadal timescales when the environmental conditions under which it accumulated change. Finally, we discuss the vulnerability of SOC in different soil types and ecosystems globally, as well as identify the need for methodological standardization of SOC quality and quantity analyses. Further study of SOC protection mechanisms and the deep soil biogeochemical environment will provide valuable information about controls on SOC cycling, which in turn may help prioritize C sequestration initiatives and provide key insights into climate-carbon feedbacks.

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Section: Forest Soilsmentioning

confidence: 99%

The Case for Digging Deeper: Soil Organic Carbon Storage, Dynamics, and Controls in Our Changing World

2019

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“…Roots and soil should be sampled at the same place where soil gas was sampled to make their δ 13 C values representative. For details see Song et al [12]. The δ 13 C values of CO 2 , soil, and root samples were analyzed using a DELTA V Advantage isotope ratio mass spectrometer (Flash EA1112 HT Elemental Analyzer, Thermo Fisher Scientific Inc., USA).…”

Section: Sampling and Analysismentioning

confidence: 99%

“…High soil moisture means there is an abundance of decomposed SOM (Fig. 4a), and soil microbes reduce the degree of activity in the rhizosphere [12,[46][47]. The reduced microbial activity in the rhizosphere can promote the reduction of plant carbon sequestration [48].…”

Section: Effect Of Soil Moisture On Soil Respirationmentioning

confidence: 99%

“…Isotope methods are advantageous for in situ measurement, allowing for accurate tracing and cause almost no disturbance. Among the isotope methods available, the natural δ 13 C abundance method of microbial biomass is suitable for partitioning rhizosphere respiration in the field [9,[11][12]. Errors are possible using isotopic partitioning techniques, but these can be reduced by using Bayesian isotopic mixing models (SIAR) [13].…”

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confidence: 99%

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How a Root-Microbial System Regulates the Response of Soil Respiration to Temperature and Moisture in a Plantation

Song

Tong

Zhang

et al. 2018

Pol. J. Environ. Stud.

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“…Forests are the largest C sinks worldwide, accounting for about two-thirds of the total C accumulation in terrestrial ecosystems [10]. Tree roots have the potential to shift underground microbial compositions [11][12][13], and, according to the ecological stoichiometry theory, this change can affect organic matter decomposition and biogeochemical cycling [6,14,15]. Tree species and microbial diversity also affect soil C accumulation in forests [11,16,17].…”

Section: Introductionmentioning

confidence: 99%

Microbial Taxa and Soil Organic Carbon Accumulation Driven by Tree Roots

Song

Liu

2018

Forests

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Rhizosphere microbes in forests are key elements for carbon accumulation in terrestrial ecosystems. To date, little is known on the rhizomicrobial community changes occurring during soil carbon accumulation. Using high-throughput DNA sequencing, we identified the phyla composing the rhizomicrobial communities of Pinus tabuliformis Carr. and Quercus variabilis Blume forests in North China and their abundance. These results were correlated with the soil organic carbon (SOC) accumulation driven by tree roots. Rhizomicrobial community composition and abundance and SOC accumulation varied with tree species, but root presence benefited SOC accumulation significantly. Different phyla played different roles in root-driven carbon accumulation during the succession of a recovery forest ecosystem, but Proteobacteria and Basidiomycota were keystones for root-driven carbon accumulation.

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Three-source partitioning of soil respiration by 13C natural abundance and its variation with soil depth in a plantation

Cited by 12 publications

References 39 publications

The Case for Digging Deeper: Soil Organic Carbon Storage, Dynamics, and Controls in Our Changing World

The Case for Digging Deeper: Soil Organic Carbon Storage, Dynamics, and Controls in Our Changing World

How a Root-Microbial System Regulates the Response of Soil Respiration to Temperature and Moisture in a Plantation

Microbial Taxa and Soil Organic Carbon Accumulation Driven by Tree Roots

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