Global atmospheric sulfur deposition and associated impaction on nitrogen cycling in ecosystems

Gao, Yang; Ma, Mengyao; Tao, Yang; Chen, Wei‐Liang; Yang, Tiantian

doi:10.1016/j.jclepro.2018.05.166

Cited by 35 publications

(20 citation statements)

References 77 publications

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“…The main sources of acid and acidifying pollutants are sulfur dioxide (SO 2 ), nitrogen oxides (NO x ) and ammonia (NH 3 ) emitted from fossil fuel combustion and agricultural activities (Zhao et al 2009, Yang et al 2012. Though SO 2 and NO x emissions have been reduced in Europe and North America, they are increasing in many developing countries due to coal combustion (Gao et al 2018). Soil acidification is a natural process, which has been accelerated by increases in N and S deposition associated with human activities (Grieve 2001, Kunhikrishnan et al 2016.…”

Section: Introductionmentioning

confidence: 99%

Global soil acidification impacts on belowground processes

Meng

Tian

Zeng

et al. 2019

Environ. Res. Lett.

151

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With continuous nitrogen (N) enrichment and sulfur (S) deposition, soil acidification has accelerated and become a global environmental issue. However, a full understanding of the general pattern of ecosystem belowground processes in response to soil acidification due to the impacting factors remains elusive. We conducted a meta-analysis of soil acidification impacts on belowground functions using 304 observations from 49 independent studies, mainly including soil cations, soil nutrient, respiration, root and microbial biomass. Our results show that acid addition significantly reduced soil pH by 0.24 on average, with less pH decrease in forest than non-forest ecosystems. The response ratio of soil pH was positively correlated with site precipitation and temperature, but negatively with initial soil pH. Soil base cations (Ca 2+ , Mg 2+ , Na + ) decreased while non-base cations (Al 3+ , Fe 3+ ) increased with soil acidification. Soil respiration, fine root biomass, microbial biomass carbon and nitrogen were significantly reduced by 14.7%, 19.1%, 9.6% and 12.1%, respectively, under acid addition. These indicate that soil carbon processes are sensitive to soil acidification. Overall, our meta-analysis suggests a strong negative impact of soil acidification on belowground functions, with the potential to suppress soil carbon emission. It also arouses our attention to the toxic effects of soil ions on terrestrial ecosystems.

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Section: Introductionmentioning

confidence: 99%

Global soil acidification impacts on belowground processes

Meng

Tian

Zeng

et al. 2019

Environ. Res. Lett.

151

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“…The global atmospheric N and S deposition in 2010 was estimated at approximately 123 Tg N y -1 and 84 Tg S y -1 , respectively (Galloway et al, 2008;Tan et al, 2018). Although the regional scales of atmospheric acid deposition exhibit varying trends, acid deposition is still increasing in China (Gao et al, 2018;Tan et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

“…Especially in some subtropical forests in southern China, the acid deposition level is two to three times that of the national average (Du et al, 2015). Evidence suggests that inputs of N and S have affected soil nutrient imbalance (Gao et al, 2018;Mori et al, 2019) and altered the biogeochemical cycles of terrestrial ecosystems (Güsewell and Gessner, 2009;Lal, 2004;Sardans and Peñuelas, 2015). Therefore, external N and S fertilizers may interact with high levels of atmospheric acid deposition to seriously threaten the soil nutrient balance and alter biogeochemical cycles in these subtropical forests.…”

Section: Introductionmentioning

confidence: 99%

Responses of soil C, N, and P stoichiometric ratios to N and S additions in a subtropical evergreen broad-leaved forest

et al. 2020

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“…Nitrogen (N) and sulfur (S) deposition has increased rapidly because of the burning of fossil fuels and the application of fertilizers since the Industrial Revolution [1,2] and has become an important contributor to global climate change [3][4][5]. The estimated global N and S depositions in were 123 Tg N y −1 and 84 Tg S y −1 , respectively [1].…”

Section: Introductionmentioning

confidence: 99%

The Additions of Nitrogen and Sulfur Synergistically Decrease the Release of Carbon and Nitrogen from Litter in a Subtropical Forest

Tie

Peñuelas

et al. 2020

Forests

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Atmospheric nitrogen (N) and sulfur (S) deposition in subtropical forests has increased rapidly and the current level is very high, thus seriously affecting nutrient (e.g., N and phosphorus (P)) release from litter. However, the specific effects of S addition and its interaction with N on the release of carbon (C), N, and P from litter in subtropical evergreen broadleaved forests are unclear. Therefore, a two-year field experiment was performed using a litterbag method in a subtropical evergreen broadleaved forest in western China to examine the responses of litter decomposition and nutrient release to the control (CK), added N (+N), added S (+S), and added N and S (+NS) treatments. The results showed that the remaining litter mass, lignin, cellulose, C, N, P, and litter N/P ratio were higher, whereas the litter C/N ratio and soil pH were lower in the fertilization treatments than in CK. The annual decomposition coefficients (k-values) in the +N, +S, and +NS treatments were 0.384 ± 0.002, 0.378 ± 0.002, and 0.374 ± 0.001 year−1, respectively, which were significantly lower than the k-values in CK (0.452 ± 0.005 year−1, p < 0.05). The remaining mass, lignin, cellulose, C, and litter N/P ratio were higher, whereas the soil pH was lower in the +NS treatment than in the +N and +S. The interactive effects of N addition and S addition on the remaining litter lignin, cellulose, C, N, and P; the litter C/N, C/P, and N/P ratios; and the soil pH were significant (p < 0.05). In conclusion, the addition of N and S synergistically decreased the degradation of lignin and cellulose and the release of C and N and increased the litter N/P ratio, suggesting that external N and S inputs synergistically slowed the release of C and N from litter and exacerbated litter P limitation during decomposition in this forest.

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Global atmospheric sulfur deposition and associated impaction on nitrogen cycling in ecosystems

Cited by 35 publications

References 77 publications

Global soil acidification impacts on belowground processes

Global soil acidification impacts on belowground processes

Responses of soil C, N, and P stoichiometric ratios to N and S additions in a subtropical evergreen broad-leaved forest

The Additions of Nitrogen and Sulfur Synergistically Decrease the Release of Carbon and Nitrogen from Litter in a Subtropical Forest

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