14C measurement of forest soils in Dinghushan Biosphere Reserve

Shen, Chengde; Li, Dongsheng; Peng, Shaolin; Sun, Yifei; Jiang, Mantao; Yi, Weixi; Xing, Changping; Gao, Qingkun; Li, Zhian; Zhou, Guoyi

doi:10.1007/bf02896286

Cited by 38 publications

(26 citation statements)

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“…The 0-0.2 m horizon was greyish brown, with abundant plant roots; 0.2-0.3 m was brownish yellow transitional layer, with sand content increasing with depth; 0.3-0.7 m was brownish yellow, intermingled with light grey sandy specks in size of 0.02-0.03 m. Based on the loose topsoil with abundant plant debris and fine grass roots, it is believed that there has not been any recent erosion of topsoil on the steep slopes. The detailed descriptions for shrub-meadow profile (GC) and forest profile (SL) are reported in Chen et al (2002a), and Wukesong profile (WKS), Qingyunsi profile (QYS) and Kengkou profile (KK) are reported in Shen et al (1999Shen et al ( , 2000. The soil sampling design and the number of samples collected from each profile are provided in Table 2.…”

Section: Soil Profiles and Samplingmentioning

confidence: 99%

“…Different plant species are known to produce organic matter compounds that vary in abundance and nature as a function of species (Grayston et al, 1996). SOM D 14 C values are generally greater than 0 in the upper soil layers of one soil profile, due to the entrance of 'bomb 14 C' into these layers through decomposition and mineralization of plant debris and fine roots (Shen et al, 1999). Since the prohibition of atmospheric nuclear weapon testing, the 14 C concentration in the atmosphere began to decrease (Burchuladze et al, 1989;Wang and Amundson, 1996).…”

Section: C Values Of Plant Debris and Topsoil Sommentioning

confidence: 99%

“…Jilong Mountain in the northwest part, with an elevation of 1000 m a.s.l., is the highest peak of the DHSBR. Additional site characteristics of the DHSBR are reported in Shen et al (1999). The basic site characteristics of the studied profiles are summarized in Table 1.…”

Section: Soil Profiles and Samplingmentioning

confidence: 99%

“…All soils within the sampling intervals were collected to obtain bulk samples. The selection of sampling intervals ( Table 2) was based on soil characteristics and the need to recover the penetrating depth of 'bomb 14 C' (Shen et al, 1999) and to determine the variation of SOM d 13 C with depth.…”

Section: Soil Profiles and Samplingmentioning

confidence: 99%

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Spatial and temporal distribution of carbon isotopes in soil organic matter at the Dinghushan Biosphere Reserve, South China

et al. 2005

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The spatial and temporal distribution of carbon isotopes ( 13 C, 14 C) in soil organic matter (SOM) were studied based on SOM content, SOM D 14 C and SOM d 13 C of thinly layered soil samples for six soil profiles with different elevations at the Dinghushan Biosphere Reserve (DHSBR), South China. The results indicate that variations of SOM d 13 C with depth of the soil profiles at different elevations are controlled by soil development, and correlate well with SOM composition in terms of SOM compartments with different turnover rates, and SOM turnover processes at the DHSBR. The effect of carbon isotope fractionation was obvious during transformation of organic matter (OM) from plant debris to SOM in topsoil and SOM turnover processes after the topsoil was buried, which resulted in great increments of OM d 13 C, respectively. Increments of SOM d 13 C of topsoil from d 13 C of plant debris were controlled by SOM turnover rates. Both topsoil SOM d 13 C and plant debris d 13 C increase with elevation, indicating regular changes in vegetation species and composition with elevation, which is consistent with the vertical distribution of vegetation at the DHSBR. The six soil profiles at different elevations had similar characteristics in variations of SOM d 13 C with depth, alterations of SOM contents with depth and that SOM 14 C apparent ages increasing with depth, respectively. These are presumably attributed to the regular distribution of different SOM compartments with depth because of their regular turnover during soil development. Depth with the maximal SOM d 13 C value is different in mechanism and magnitude with penetrating depth of 14 C produced by nuclear explosion into atmosphere from 1952 to 1962, and both indicate controls of topography and vegetation on the distribution of SOM carbon isotopes with depth. Elevation exerts indirect controls on the spatial and temporal distribution of SOM carbon isotopes of the studied mountainous soil profiles at the DHSBR. This study shows that mountainous soil profiles at different elevations and with distinctive aboveground vegetation are presumably ideal sites for studies on soil carbon dynamics in different climatic-vegetation zones.

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Section: Soil Profiles and Samplingmentioning

confidence: 99%

Section: C Values Of Plant Debris and Topsoil Sommentioning

confidence: 99%

Section: Soil Profiles and Samplingmentioning

confidence: 99%

Section: Soil Profiles and Samplingmentioning

confidence: 99%

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Spatial and temporal distribution of carbon isotopes in soil organic matter at the Dinghushan Biosphere Reserve, South China

et al. 2005

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“…Many researches concerned with this forest were carried out and got fruitful results [14−18]. Shen et al [14] and Chen et al [15] have investigated the 14 C apparent age and the decomposition characters of SOC in detail. Recent results demonstrated that the forest ecosystem was a possible sink for atmospheric CO 2 because of continuous accumulation of SOC [16].…”

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confidence: 99%

Carbon isotopic composition, turnover and origins of soil CO2 in a monsoon evergreen broadleaf forest in the Dinghushan Biosphere Reservoir, South China

et al. 2010

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Carbon isotopic compositions of soil CO 2 in rainy season (July) from two natural soil profiles (DHLS & DHS) in the monsoon evergreen broadleaf forest in the Dinghushan Biosphere Reservoir (DBR), South China, are presented. Turnover and origins of soil CO 2 are preliminarily discussed in this paper. Results show that the content of soil CO 2 varies between 6120 and 18718 ppmv, and increases with increasing depth until 75 cm, and then it declines. In DHLS, soil CO 2 δ 13 C ranges from −24.71‰ to −24.03‰, showing a significant inverse correlation (R 2 ＝0.91) with the soil CO 2 content in the same layer. According to a model related to soil CO 2 δ 13 C, the soil CO 2 is mainly derived from the root respiration (>80%) in DHLS. While in DHS, where soil CO 2 δ 13 C ranges from −25.19‰ to −22.82‰, soil CO 2 is primarily originated from the decomposition of organic matter (51%-94%), excluding the surface layer (20 cm, 90%). Radiocarbon data suggest that the carbon in soil CO 2 is modern carbon in both DHLS and DHS. Differences in 14 C ages between the "oldest" and "youngest" soil CO 2 in DHLS and DHS are 8 months and 14 months, respectively, indicating that soil CO 2 in DHLS has a faster turnover rate than that in DHS. The Δ 14 C values of soil CO 2 , which range between 100.0‰ and 107.2‰ and between 102.5‰ and 112.1‰ in DHLS and DHS, respectively, are obviously higher than those of current atmospheric CO 2 and SOC in the same layer, suggesting that soil CO 2 is likely an important reservoir for Bomb-14 C in the atmosphere.Dinghushan Biosphere Reservoir, soil CO 2 , turnover, Bomb-14 CO 2 , 13 C & 14 C Citation:Ding P, Shen C D, Wang N, et al. Carbon isotopic composition, turnover and origins of soil CO 2 in a monsoon evergreen broadleaf forest in the

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Soil Carbon Dynamics in a Subtropical Mountainous Region, South China: Results Based on Carbon Isotopic Tracing

Chen

Shen

Sun

et al.

Soil Mineral Microbe-Organic Interactions

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14C measurement of forest soils in Dinghushan Biosphere Reserve

Cited by 38 publications

References 4 publications

Spatial and temporal distribution of carbon isotopes in soil organic matter at the Dinghushan Biosphere Reserve, South China

Spatial and temporal distribution of carbon isotopes in soil organic matter at the Dinghushan Biosphere Reserve, South China

Carbon isotopic composition, turnover and origins of soil CO2 in a monsoon evergreen broadleaf forest in the Dinghushan Biosphere Reservoir, South China

Soil Carbon Dynamics in a Subtropical Mountainous Region, South China: Results Based on Carbon Isotopic Tracing

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