Methane uptake responses to nitrogen deposition in three tropical forests in southern China

Zhang, Wei; Mo, Jiangming; Zhou, Guoyi; Gundersen, Per; Fang, Yunting; Lu, Xiankai; Zhang, Tao; Dong, Shaoming

doi:10.1029/2007jd009195

Cited by 72 publications

(107 citation statements)

References 78 publications

(126 reference statements)

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“…The subtropical plantation forest soils exhibited a sink of atmospheric CH 4 with a mean annual CH4 uptake of 42.3 ± 0.15 g C m −2 h −1 , which is very close to those observed from the subtropical forests of southern China (41.1 g C m −2 h −1 , Zhang et al, 2008b) and the tropical rain forest in Australia (46.67 g C m −2 h −1 , Rowlings et al, 2012). In general, N addition can strongly inhibit CH 4 oxidation in forest soils through the following mechanisms: the competitive inhibition of CH 4 (Bodelier, 2011).…”

Section: Effects Of Simulated N Deposition On Soil Ch 4 Uptakesupporting

confidence: 55%

“…The subtropical plantation forests are vulnerable to increased N deposition due to single community structure and barren soil fertility. Previous studies show that simulated NH 4 NO 3 inputs to the subtropical forests significantly inhibit litter decomposition and soil CO 2 emission (Fang et al, 2007;Mo et al, 2008), decrease CH 4 uptake (Zhang et al, 2008b(Zhang et al, , 2012b, and increase gaseous N emission (N 2 O, NO, and N 2 ) (Zhang et al, 2008a(Zhang et al, , 2009 (Sheng et al, 2014). The contrasting effects of N cumulation on root autotropical respiration and microbial heterotropical respiration dominate the reponses of soil CO 2 flux to N addtion .…”

Section: Introductionmentioning

confidence: 99%

“…Terrestrial ecosystems are vital regulators of atmospheric GHG concentrations with a considerable amount of them produced and consumed through soil processes (Canadell et al, 2007). The exchanges of CO 2 , CH 4 and N 2 O from global land anthropogenic atmospheric N deposition into the biosphere has increased by more than three-fold since 1860s (Galloway et al, 2008), thereby promotes vegetation production (Magnani et al, 2007), decreases soil CO 2 emission and CH 4 uptake (Zhang et al, 2008b), and increases soil N 2 O emission (Lu et al, 2011), although some contrary effects and lacks of response have also been reported (Ambus and Robertson, 2006;Fang et al, 2012;Xu et al, 2014). Considering the effects of N deposition on soil CH 4 uptake and N 2 O emission, the carbon (C) sequestration potential elicited by N deposition would be offset by more than 50% (Liu and Greaver, 2009).…”

Section: Introductionmentioning

confidence: 99%

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The contrasting effects of deposited NH4+ and NO3− on soil CO2, CH4 and N2O fluxes in a subtropical plantation, southern China

Cheng

Fang

et al. 2015

Ecological Engineering

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a b s t r a c tBackground and aims: Deposited NH 4 + and NO 3 − differently affect soil carbon (C) and nitrogen (N) cycles due to their contrasting actions in terrestrial ecosystems. However, little information on the effects of exogenous NH 4 + and NO 3 − inputs on the exchange of greenhouse gases (GHGs) from the subtropical plantation soils as well as their contribution to global warming is available to date. Methods: Based on a field experiment, two-form (NH 4 Cl and NaNO 3 ) and two-level (40 and 120 kg N ha −1 yr −1 ) of N addition, in a slash pine plantation of southern China, we investigated soil CO 2 , CH 4 and N 2 O fluxes and related auxiliary variables (soil temperature and moisture) twice a week using static chamber-gas chromatography. The total global warming potential (GWP) of soil GHG fluxes and N 2 O emission factor (EF) were calculated. Results: Low level of NaNO 3 addition significantly increased cumulative annual soil CO 2 emission by 33.7%. N addition significantly promoted annual soil N 2 O emission by 2.4-6.9 folds; moreover, ammonium-N addition had a greater promotion to soil N 2 O emission than nitrate-N addition. However, short-term N addition did not change soil CH 4 uptake. Also, soil CO 2 and N 2 O fluxes were positively correlated with soil temperature and moisture, while soil CH 4 uptake was only driven by soil moisture. Overall, elevated N addition increased the total GWP, and changed the temperature sensitivity (Q 10 ) of soil CO 2 and N 2 O fluxes. Conclusions: These results suggest that chronic atmospheric N deposition changes soil-atmospheric GHG fluxes in the subtropical plantation of southern China depending on the levels and forms of N input, and would exacerbate global warming.

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Section: Effects Of Simulated N Deposition On Soil Ch 4 Uptakesupporting

confidence: 55%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The contrasting effects of deposited NH4+ and NO3− on soil CO2, CH4 and N2O fluxes in a subtropical plantation, southern China

Cheng

Fang

et al. 2015

Ecological Engineering

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“…However, CH 4 uptake at our site was significantly inhibited by N addition, and the decrease in soil CH 4 uptake was higher than that reported for forest soils in South China [22][23] despite similar N addition levels. This result indicates that different responses of soil CH 4 uptake to N addition may be due to climate conditions, vegetation, soil type etc.…”

Section: Effect Of N Deposition On Soil Ch 4 Uptakecontrasting

confidence: 40%

Effects of Nitrogen Deposition on CH4 Uptake and CO2 Emission from a temperate forests in Northeastern China

Yan¹,

Xing²,

Wang³

et al. 2016

Proceedings of the 2015 4th International Conference on Sustainable Energy and Environmental Engineering

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Little is known about how N deposition affects greenhouse gas balances in different temporal patterns (daytime and nighttime),and few studies have been conducted to quantify the effects of N deposition on soil CH 4 uptake and CO 2 emission in a typical temperate forests. To investigate the effects of N deposition on soil CH 4 uptake and CO 2 emission, simulated N deposition experiment was initiated in temperate forests in Northeastern China in May 2011. In this study, NH 4 NO 3 fertilizer was applied throughout the growing season at four N treatment levels (three replicates): control (CK), no added N; low-N (T L ), 5 g N m -2. yr -1 ; medium-N (T M ), 10 g N m -2. yr -1 ; and high-N (T H ), 15 g N m -2. yr -1 . Diurnal soil CH 4 uptake and CO 2 emission rates were observed in August 2014 using Greenhouse Gas Analyzers. Our results showed that N deposition tended to restrict CH 4 uptake and significantly increased soil CO 2 emission (except in the T H treatment). In addition, the CO 2 and CH 4 fluxes in daytime and nighttime were significantly different. These results indicate that N deposition controls the CH 4 uptake and suggest that alterations of the N cycle due to N deposition may convert sequestered C in forest soils into a C source. However, this paper is also to promote a better understanding of the impact of N deposition on soil C fluxes under the different temporal patterns.

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“…The key limitation of the N effect approach adopted in the R99 and C07 models is the generalization of N inhibitory effects across different agricultural areas, crops and types of land management, which results in a homogeneous and excessive attenuation of CH 4 oxidation rates. In contrast, the MeMo r N parameterization employs a more conservative r N factor and a realistic regional distribution, which is based upon observational data that are consistent with recent studies reporting that high rates of N deposition (10 kg N ha −1 yr −1 ) can reduce soil uptake of atmospheric CH 4 by ∼ 8.6 % (Fang et al, 2014;Zhang et al, 2008). Direct application of fertilizers at more extreme rates (> 300 kg N ha −1 yr −1 ) can entirely eliminate uptake of atmospheric CH 4 by agricultural soil (Veldkamp et al, 2001).…”

Section: Regional Ch 4 Uptake By Soilsmentioning

confidence: 67%

Soil Methanotrophy Model (MeMo v1.0): a process-based model to quantify global uptake of atmospheric methane by soil

et al. 2018

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Abstract. Soil bacteria known as methanotrophs are the sole biological sink for atmospheric methane (CH 4 ), a potent greenhouse gas that is responsible for ∼ 20 % of the humandriven increase in radiative forcing since pre-industrial times. Soil methanotrophy is controlled by a plethora of factors, including temperature, soil texture, moisture and nitrogen content, resulting in spatially and temporally heterogeneous rates of soil methanotrophy. As a consequence, the exact magnitude of the global soil sink, as well as its temporal and spatial variability, remains poorly constrained. We developed a process-based model (Methanotrophy Model; MeMo v1.0) to simulate and quantify the uptake of atmospheric CH 4 by soils at the global scale. MeMo builds on previous models by Ridgwell et al. (1999) and Curry (2007) by introducing several advances, including (1) a general analytical solution of the one-dimensional diffusion-reaction equation in porous media, (2) a refined representation of nitrogen inhibition on soil methanotrophy, (3) updated factors governing the influence of soil moisture and temperature on CH 4 oxidation rates and (4) the ability to evaluate the impact of autochthonous soil CH 4 sources on uptake of atmospheric CH 4 . We show that the improved structural and parametric representation of key drivers of soil methanotrophy in MeMo results in a better fit to observational data. A global simulation of soil methanotrophy for the period 1990-2009 using MeMo yielded an average annual sink of 33.5 ± 0.6 Tg CH 4 yr −1 . Warm and semi-arid regions (tropical deciduous forest and open shrubland) had the highest CH 4 uptake rates of 602 and 518 mg CH 4 m −2 yr −1 , respectively. In these regions, favourable annual soil moisture content (∼ 20 % saturation) and low seasonal temperature variations (variations < ∼ 6 • C) provided optimal conditions for soil methanotrophy and soil-atmosphere gas exchange. In contrast to previous model analyses, but in agreement with recent observational data, MeMo predicted low fluxes in wet tropical regions because of refinements in formulation of the influence of excess soil moisture on methanotrophy. Tundra and mixed forest had the lowest simulated CH 4 uptake rates of 176 and 182 mg CH 4 m −2 yr −1 , respectively, due to their marked seasonality driven by temperature. Global soil uptake of atmospheric CH 4 was decreased by 4 % by the effect of nitrogen inputs to the system; however, the direct addition of fertilizers attenuated the flux by 72 % in regions with high agricultural intensity (i.e. China, India and Europe) and by 4-10 % in agriculture areas receiving low rates of N input (e.g. South America). Globally, nitrogen inputs reduced soil uptake of atmospheric CH 4 by 1.38 Tg yr −1 , which is 2-5 times smaller than reported previously. In addition to improved characterization of the contemporary soil sink for atmospheric CH 4 , MeMo provides an opportunity to quantify more accurately the relative importance of soil methanotrophy in the global CH 4 cycle in the past and its capaci...

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Methane uptake responses to nitrogen deposition in three tropical forests in southern China

Cited by 72 publications

References 78 publications

The contrasting effects of deposited NH4+ and NO3− on soil CO2, CH4 and N2O fluxes in a subtropical plantation, southern China

The contrasting effects of deposited NH4+ and NO3− on soil CO2, CH4 and N2O fluxes in a subtropical plantation, southern China

Effects of Nitrogen Deposition on CH4 Uptake and CO2 Emission from a temperate forests in Northeastern China

Soil Methanotrophy Model (MeMo v1.0): a process-based model to quantify global uptake of atmospheric methane by soil

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