Spatial Variation in the Storages and Age-Related Dynamics of Forest Carbon Sequestration in Different Climate Zones—Evidence from Black Locust Plantations on the Loess Plateau of China

Li, Taijun; Ren, Bowen; Wang, Dahui; Liu, Guobin

doi:10.1371/journal.pone.0121862

Cited by 20 publications

(15 citation statements)

References 44 publications

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“…Mean annual rainfall gradually decreased from the southeast to northwest (Yamanaka et al ), and reference evaporation increased from south to north in our research region (Li et al ). Mean annual rainfall and mean annual air temperature were 606 mm and 10.8°C in the BL‐Wet site (Li et al ), 577 mm and 9.0°C in the Oak‐Wet site (Li and Shao ), 514 mm and 10.2°C in the BL‐Med and Oak‐Med site (Otsuki et al ), and 449 mm and 8.8°C in the BL‐Dry site (Qiu et al ).…”

Section: Methodsmentioning

confidence: 99%

Soil nitrogen cycling is determined by the competition between mycorrhiza and ammonia‐oxidizing prokaryotes

Tatsumi

Taniguchi

et al. 2020

Ecology

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Mycorrhizal fungi have considerable effects on soil carbon (C) storage, as they control the decomposition of soil organic matter (SOM), by modifying the amount of soil nitrogen (N) available for free‐living microbes. Through their access to organic N, ectomycorrhizal (ECM) fungi compete with free‐living soil microbes; this competition is thought to slow down SOM decomposition. However, arbuscular mycorrhizal (AM) fungi cannot decompose SOM, and therefore must wait for N to first be processed by free‐living microbes. It is unclear what form of N the ECM fungi and free‐living microbes compete for, or which microbial groups compete for N with ECM fungi. To investigate this, we focused on the N transformation steps (i.e., the degradation of high‐molecular‐weight organic matter, mineralization, and nitrification) and the microbes driving each step. Simple comparisons between AM forests and ECM forests are not sufficient to assert that mycorrhizal types would determine the N transformation steps in soil, because soil physiochemistry, which strongly affects N transformation steps, differs between the forests. We used an aridity gradient with large differences in soil moisture, pH, and SOM quantity and quality, to distinguish the mycorrhizal and physicochemical effects on N transformation. Soil samples (0–10 cm depth) were collected from AM‐symbiotic black locust forests under three aridity levels, and from ECM‐symbiotic oak forests under two aridity levels. Soil physicochemical properties, extractable N dynamics and abundance, composition, and function of soil microbial communities were measured. In ECM forests, the ammonia‐oxidizing prokaryotic abundance was low, whereas that of ECM fungi was high, resulting in lower nitrate N content than in AM forests. Since ECM forests did not have lower saprotrophic fungal abundance and prokaryotic decompositional activity than the AM forests, the hypothesis that ECM fungi could reduce SOM decay and ammonification by free‐living microbes, might not hold in ECM forests. However, the limitation of ECM fungi on nitrate N production would result in a feedback that will accelerate plant dependence on these fungi, thereby raising soil C storage through an increase in the ECM biomass and plant C investment in soils.

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Section: Methodsmentioning

confidence: 99%

Soil nitrogen cycling is determined by the competition between mycorrhiza and ammonia‐oxidizing prokaryotes

Tatsumi

Taniguchi

et al. 2020

Ecology

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“…Approximately 48.0-57.8% of SOC was found in the top 40 cm soil in all stands (Figure 2), despite the topsoil being vulnerable to human disturbance and natural erosion [16]. Thus, focus on the vertical variability of SOC stock, and protection of the topsoil from loss is essential for C sequestration [14]. The average SOC stock of 136.0 Mg ha −1 in 100 cm depth ( Figure 2) was similar to the mean value of 146.2 Mg ha −1 obtained from different-aged rubber plantations [18,23], but higher than that (89.5-96.9 Mg ha −1 ) in Thailand [19] and Hainan Island [29].…”

Section: Soil C Stockmentioning

confidence: 99%

Carbon Stocks across a Fifty Year Chronosequence of Rubber Plantations in Tropical China

Liu

Pang

Jepsen

et al. 2017

Forests

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Abstract:Transition from forest to rubber (Hevea brasiliensis Muell. Arg.) plantation has occurred in tropical China for decades. Rubber has been planted on 1 million ha to provide raw materials to the rubber industry. The role of various-aged rubber plantations in carbon (C) sequestration remains unclear. The biomass C accumulation including latex C and C distribution in soil of five different-aged stands (7,13,19,25 and 47 years old) were examined. The total biomass C stock (TBC) and total net primary productivity (NPP total ), whether with or without latex C, had a close quadratic relationship with stand age. Regardless of stand age, around 68% of the C was stored in aboveground biomass, and NPP latex contributed to approximately 18% of C sequestration. Soil organic carbon stock in the 100-cm depth remained relatively stable, but it lost about 16.8 Mg ha −1 with stand age. The total ecosystem C stock (TEC) across stands averaged 159.6, 174.4, 229.6, 238.1 and 291.9 Mg ha −1 , respectively, of which more than 45% was stored in the soil. However, biomass would become the major C sink rather than soil over a maximal rubber life expectancy. Regression analysis showed that TEC for rubber plantation at 22 years is comparable to a baseline of 230.4 Mg ha −1 for tropical forest in China, and would reach the maximum value at around 54 years. Therefore, rubber plantation can be considered as alternative land use without affecting net forest ecosystem C storage. In addition to the potential C gains, a full set of ecosystem and economic properties have to be quantified in order to assess the trade-offs associated with forest-to-rubber transition.

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“…C sequestration in forest ecosystems is affected by stand age, topography, climate, soil type, tree species, and management regime [13,14]. It has been known that the C stored in tree biomass increases with stand age, but the trend may be different for the mineral soil C storage [11,15,16].…”

Section: Introductionmentioning

confidence: 99%

Carbon Stocks across a Fifty Year Chronosequence of Rubber Plantations in Tropical China

Liu¹,

Pang²,

Jepsen³

et al. 2017

Preprint

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Transition from forest to rubber (Hevea brasiliensis Muell. Arg.) plantation has occurred in tropical China for decades. Rubber has been planted on 1 million ha to provide raw materials to the rubber industry. The role of various-aged rubber plantations in carbon (C) sequestration remains unclear. The biomass C accumulation including latex C and C distribution in soil of five different-aged stands (7, 13, 19, 25 and 47 years old) were examined. The total biomass C stock (TBC) and total net primary productivity (NPP total), whether with or without latex C, had a close quadratic relationship with stand age. Regardless of stand age, around 68% of the C was stored in aboveground biomass, and NPP latex contributed to approximately 18% of C sequestration. Soil organic carbon stock in the 100-cm depth remained relatively stable, but it lost about 16.8 Mg ha −1 with stand age. The total ecosystem C stock (TEC) across stands averaged 159.6, 174.4, 229.6, 238.1 and 291.9 Mg ha −1 , respectively, of which more than 45% was stored in the soil. However, biomass would become the major C sink rather than soil over a maximal rubber life expectancy. Regression analysis showed that TEC for rubber plantation at 22 years is comparable to a baseline of 230.4 Mg ha −1 for tropical forest in China, and would reach the maximum value at around 54 years. Therefore, rubber plantation can be considered as alternative land use without affecting net forest ecosystem C storage. In addition to the potential C gains, a full set of ecosystem and economic properties have to be quantified in order to assess the trade-offs associated with forest-to-rubber transition.

show abstract

Spatial Variation in the Storages and Age-Related Dynamics of Forest Carbon Sequestration in Different Climate Zones—Evidence from Black Locust Plantations on the Loess Plateau of China

Cited by 20 publications

References 44 publications

Soil nitrogen cycling is determined by the competition between mycorrhiza and ammonia‐oxidizing prokaryotes

Soil nitrogen cycling is determined by the competition between mycorrhiza and ammonia‐oxidizing prokaryotes

Carbon Stocks across a Fifty Year Chronosequence of Rubber Plantations in Tropical China

Carbon Stocks across a Fifty Year Chronosequence of Rubber Plantations in Tropical China

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