Enhanced atmospheric nitrogen deposition at a rural site in northwest China from 2011 to 2018

Fu, Yongcai; Xu, Wen; Wen, Zhang; Han, Mengjuan; Sun, Jianhao; Tang, Aohan; Liu, Xuejun

doi:10.1016/j.atmosres.2020.105071

Cited by 17 publications

(9 citation statements)

References 64 publications

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“…The decomposition process of plant species (including invasive plants) can be influenced by the deposition of atmospheric nitrogen (hereafter abbreviated as D-AN). In particular, D-AN contains numerous nitrogen components, and the ratio of different nitrogen components in D-AN is expected to change due to the increased intensity and frequency of anthropological activities, as well as the progressive changes in the energy policy and energy mix in China in recent years [19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Do the Leaves of Multiple Invasive Plants Decompose More Easily than a Native Plant’s under Nitrogen Deposition with Different Forms?

Li,

Zhong

et al. 2024

Nitrogen

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This study aimed to clarify the differences in the decomposition rates, soil carbon and nitrogen contents, soil enzyme activities, and the structure of the soil bacterial community between the four Asteraceae invasive plants (AIPs), Bidens pilosa L., Conyza canadensis (L.) Cronq., Solidago canadensis L., and Symphyotrichum subulatum (Michx.) G.L. Nesom, and the native plant Pterocypsela laciniata (Houtt.) Shih under the artificially modeled nitrogen with four forms (including nitrate, ammonium, urea, and the mixed nitrogen forms with an equal mixture of three individual nitrogen forms). The mixed nitrogen forms significantly increased the decomposition rate of the four AIPs and P. laciniata. The positive effects of the mixed nitrogen forms on the decomposition rate of the four AIPs and P. laciniata were obviously greater than those of individual nitrogen forms. Nitrogen with four forms visibly up- or down-regulated the dominant role of predominant soil bacterial biomarkers, and significantly increased the species number, richness, and phylogenetic diversity of the soil bacterial community, as well as the number of most of the functional gene pathways of the soil bacterial communities involved in the decomposition process. The decomposition rate of the four AIPs was similar to that of P. laciniata. The leaves of C. canadensis decomposed more easily than those of S. subulatum. The decomposition process of the four AIPs caused remarkable changes in the relative abundance of several taxa of the soil bacterial community and soil bacterial beta diversity, and caused apparent up- or down-regulation in the dominant role of predominant soil bacterial biomarkers and the number of several functional gene pathways of the soil bacterial communities involved in the decomposition process.

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Section: Introductionmentioning

confidence: 99%

Do the Leaves of Multiple Invasive Plants Decompose More Easily than a Native Plant’s under Nitrogen Deposition with Different Forms?

Li,

Zhong

et al. 2024

Nitrogen

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“…For example, Li (2020) determined that the aerosol optical depth and absorbing aerosol index exhibited a continuous upward trend from 2000 to 2017. Fu et al (2020) found that annual total Nr deposition increased at a rate of 10%, and the ground‐level O 3 and NH 3 concentrations also increased by 13% and 107% during 2011–2018 in this region, respectively. Thus, the increased aerosol loading was also the main driving factor for dimming in Northwest China, which has also been proven by Fang et al (2021).…”

Section: Discussionmentioning

confidence: 96%

Interaction between wind speed and net radiation controls reference evapotranspiration variance in the inland river basin of Northwest China

Ning

Feng

et al. 2022

Hydrological Processes

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Exploring the variance in reference evapotranspiration (ET 0 ) and its dominant influencing factors is important for climate change, hydrological cycles and water management. Temperature (T), wind speed (U 2 ), net radiation (R n ) and actual vapour pressure (e a ) are the major climatic input variables in Penman-Monteith equation. Previous studies have successfully applied the total differential method to determine the relative contributions of changes in these variables to variation in ET 0 on different timescales. However, the interaction of climatic variables has not been incorporated into this method. Taking the inland river basin of Northwest China as the study area, we extended the total differential method to decompose the ET 0 variance into temporal variance and covariance of T, U 2 , R n and e a on intra-annual and annual scales during 1960-2017. The results indicated that the variance in ET 0 on the intra-annual scale was larger than that on the annual scale. Among the four single climatic variables, U 2 variance made larger contributions to intra-annual and annual ET 0 variance with relative contributions of 6.8% and 1.1%, respectively. However, the interaction of climatic variables played a dominant role in the variation in ET 0 . Specifically, on intra-annual scale, coupled U 2 and R n primarily controlled the ET 0 variance (76.1%), followed by coupled R n and e a (9.6%); but their positive effects were weakened by the negative effects of coupled T and e a (À2.3%). On annual scale, coupled U 2 and R n still governed the variance in ET 0 (97.3%), but the effects were also weakened by other groups of interaction effects. Furthermore, ET 0 was highly related to NDVI on an intra-annual scale (R 2 = 0.68, p = 0.00), indicating the strong effect of seasonal vegetation dynamics on ET 0 variance. This study provides new insights to quantitatively assess the interaction effects of environmental factors on key hydrometeorological variables.

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“…All four forms of N were added at 5 g N m −2 yr −1 , with sterile distilled water as the control (0 g N L −1 ). The levels of the four N forms were similar to the actual concentration of N forms naturally deposited in the study area (viz., southern Jiangsu, China) [24,[37][38][39].…”

Section: Experimental Designmentioning

confidence: 99%

Litter Mass Loss of the Invasive Rhus typhina L. and Native Koelreuteria paniculata Laxm. Trees Alters Soil N-Fixing Bacterial Community Composition under Different N Forms

Li,

Cheng

et al. 2024

Atmosphere

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Soil N-fixing bacterial (NFB) community may facilitate the successful establishment and invasion of exotic non-nitrogen (N) fixing plants. Invasive plants can negatively affect the NFB community by releasing N during litter decomposition, especially where N input from atmospheric N deposition is high. This study aimed to quantitatively compare the effects of the invasive Rhus typhina L. and native Koelreuteria paniculata Laxm. trees on the litter mass loss, soil physicochemical properties, soil enzyme activities, and the NFB. Following N supplementation at 5 g N m−2 yr−1 in four forms (including ammonium, nitrate, urea, and mixed N with an equal mixture of the three individual N forms), a litterbag-experiment was conducted indoors to simulate the litter decomposition of the two trees. After four months of decomposition, the litter cumulative mass losses of R. typhina under the control, ammonium chloride, potassium nitrate, urea, and mixed N were 57.93%, 57.38%, 58.69%, 63.66%, and 57.57%, respectively. The litter cumulative mass losses of K. paniculata under the control, ammonium chloride, potassium nitrate, urea, and mixed N were 54.98%, 57.99%, 48.14%, 49.02%, and 56.83%, respectively. The litter cumulative mass losses of equally mixed litter from both trees under the control, ammonium chloride, potassium nitrate, urea, and mixed N were 42.95%, 42.29%, 50.42%, 46.18%, and 43.71%, respectively. There were antagonistic responses to the co-decomposition of the two trees. The litter mass loss of the two trees was mainly associated with the taxonomic richness of NFB. The form of N was not significantly associated with the litter mass loss in either species, the mixing effect intensity of the litter co-decomposition of the two species, and NFB alpha diversity. Litter mass loss of R. typhina was significantly higher than that of K. paniculata under urea. The litter mass loss of the two trees under the control and N in four forms mainly affected the relative abundance of numerous NFB taxa, rather than NFB alpha diversity.

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Enhanced atmospheric nitrogen deposition at a rural site in northwest China from 2011 to 2018

Cited by 17 publications

References 64 publications

Do the Leaves of Multiple Invasive Plants Decompose More Easily than a Native Plant’s under Nitrogen Deposition with Different Forms?

Do the Leaves of Multiple Invasive Plants Decompose More Easily than a Native Plant’s under Nitrogen Deposition with Different Forms?

Interaction between wind speed and net radiation controls reference evapotranspiration variance in the inland river basin of Northwest China

Litter Mass Loss of the Invasive Rhus typhina L. and Native Koelreuteria paniculata Laxm. Trees Alters Soil N-Fixing Bacterial Community Composition under Different N Forms

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