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594 results on '"Bai, Yongfei"'

1. Intermediate soil acidification induces highest nitrous oxide emissions.

Author

Qiu, Yunpeng, Zhang, Yi, Zhang, Kangcheng, Xu, Xinyu, Zhao, Yunfeng, Bai, Tongshuo, Zhao, Yexin, Wang, Hao, Sheng, Xiongjie, Bloszies, Sean, Gillespie, Christopher, He, Tangqing, Wang, Yang, Chen, Huaihai, Guo, Lijin, Song, He, Ye, Chenglong, Wang, Yi, Woodley, Alex, Guo, Jingheng, Cheng, Lei, Bai, Yongfei, Zhu, Yongguan, Hallin, Sara, Hu, Shuijin, and Firestone, Mary

Subjects
Soil, Agriculture, Nitrous Oxide, Fertilizers, Nitrogen, Hydrogen-Ion Concentration, Soil Microbiology, Denitrification
Abstract

Global potent greenhouse gas nitrous oxide (N2O) emissions from soil are accelerating, with increases in the proportion of reactive nitrogen emitted as N2O, i.e., N2O emission factor (EF). Yet, the primary controls and underlying mechanisms of EFs remain unresolved. Based on two independent but complementary global syntheses, and three field studies determining effects of acidity on N2O EFs and soil denitrifying microorganisms, we show that soil pH predominantly controls N2O EFs and emissions by affecting the denitrifier community composition. Analysis of 5438 paired data points of N2O emission fluxes revealed a hump-shaped relationship between soil pH and EFs, with the highest EFs occurring in moderately acidic soils that favored N2O-producing over N2O-consuming microorganisms, and induced high N2O emissions. Our results illustrate that soil pH has a unimodal relationship with soil denitrifiers and EFs, and the net N2O emission depends on both the N2O/(N2O + N2) ratio and overall denitrification rate. These findings can inform strategies to predict and mitigate soil N2O emissions under future nitrogen input scenarios.

Published
2024

21. Livestock grazing regulates ecosystem multifunctionality in semi‐arid grassland

Author

Ren, Haiyan, Eviner, Valerie T, Gui, Weiyang, Wilson, Gail WT, Cobb, Adam B, Yang, Gaowen, Zhang, Yingjun, Hu, Shuijin, and Bai, Yongfei

Subjects
functional diversity, grazing pressure, semi-arid grassland, soil microbes, species richness, threshold, Environmental Sciences, Biological Sciences, Ecology
Abstract

Livestock grazing has been shown to alter the structure and functions of grassland ecosystems. It is well acknowledged that grazing pressure is one of the strongest drivers of ecosystem-level effects of grazing, but few studies have assessed how grazing pressure impacts grassland biodiversity and ecosystem multifunctionality (EMF). Here, we assessed how different metrics of biodiversity (i.e., plants and soil microbes) and EMF responded to seven different grazing treatments based on an 11-year field experiment in semi-arid Inner Mongolian steppe. We found that soil organic carbon, plant-available nitrogen and plant functional diversity all decreased even at low grazing pressure, while above-ground primary production and bacterial abundance decreased only at high levels of grazing pressure. Structural equation models revealed that EMF was driven by direct effects of grazing, rather than the effects of grazing on plant or microbial community composition. Grazing effects on plant functional diversity and soil microbial abundance did have moderate effects on EMF, while plant richness did not. Synthesis. Our results showed ecosystem functions differ in their sensitivity to grazing pressure, requiring a low grazing threshold to achieve multiple goals in the Eurasian steppe. A plain language summary is available for this article.

Published
2018

27. Long-term effects of grazing and topography on extra-radical hyphae of arbuscular mycorrhizal fungi in semi-arid grasslands

Author

Ren, Haiyan, Gui, Weiyang, Bai, Yongfei, Stein, Claudia, Rodrigues, Jorge LM, Wilson, Gail WT, Cobb, Adam B, Zhang, Yingjun, and Yang, Gaowen

Subjects
Microbiology, Biological Sciences, Ecology, Life Below Water, Animal Husbandry, Animals, China, Geography, Grassland, Hyphae, Mycorrhizae, Population Density, Sheep, Grazing pressure, Hyphal length density, Edaphic properties, Structural equation modeling, Plant Biology, Plant Biology & Botany, Plant biology
Abstract

Grazing and topography have drastic effects on plant communities and soil properties. These effects are thought to influence arbuscular mycorrhizal (AM) fungi. However, the simultaneous impacts of grazing pressure (sheep ha-1) and topography on plant and soil factors and their relationship to the production of extra-radical AM hyphae are not well understood. Our 10-year study assessed relationships between grazing, plant species richness, aboveground plant productivity, soil nutrients, edaphic properties, and AM hyphal length density (HLD) in different topographic areas (flat or sloped). We found HLD linearly declined with increasing grazing pressure (1.5-9.0 sheep ha-1) in sloped areas, but HLD was greatest at moderate grazing pressure (4.5 sheep ha-1) in flat areas. Structural equation modeling indicates grazing reduces HLD by altering soil nutrient dynamics in sloped areas, but non-linearly influences HLD through plant community and edaphic changes in flat areas. Our findings highlight how topography influences key plant and soil factors, thus regulating the effects of grazing pressure on extra-radical hyphal production of AM fungi in grasslands. Understanding how grazing and topography influence AM fungi in semi-arid grasslands is vital, as globally, severe human population pressure and increasing demand for food aggravate the grazing intensity in grasslands.

Published
2018

33. Limited evidence for spatial resource partitioning across temperate grassland biodiversity experiments

Author

Barry, Kathryn E., van Ruijven, Jasper, Mommer, Liesje, Bai, Yongfei, Beierkuhnlein, Carl, Buchmann, Nina, de Kroon, Hans, Ebeling, Anne, Eisenhauer, Nico, Guimarães-Steinicke, Claudia, Hildebrandt, Anke, Isbell, Forest, Milcu, Alexandru, Neßhöver, Carsten, Reich, Peter B., Roscher, Christiane, Sauheitl, Leopold, Scherer-Lorenzen, Michael, Schmid, Bernhard, Tilman, David, von Felten, Stefanie, and Weigelt, Alexandra

Published
2020

44. Plant litter loss exacerbates drought influences on grasslands.

Author

Chen, Wanjie, Jiang, Lin, Jia, Ruoyu, Tang, Bo, Jiang, Hongzhi, Wang, Yang, Lu, Xiaoming, Su, Jishuai, and Bai, Yongfei

Subjects
PLANT litter, GRASSLANDS, DROUGHTS, SOIL temperature, ENVIRONMENTAL soil science, CHEMICAL composition of plants, SOIL moisture, PLATEAUS
Abstract

Summary: Plant litter is known to affect soil, community, and ecosystem properties. However, we know little about the capacity of litter to modulate grassland responses to climate change.Using a 7‐yr litter removal experiment in a semiarid grassland, here we examined how litter removal interacts with a 2‐yr drought to affect soil environments, plant community composition, and ecosystem function.Litter loss exacerbates the negative impacts of drought on grasslands. Litter removal increased soil temperature but reduced soil moisture and nitrogen mineralization, which substantially increased the negative impacts of drought on primary productivity and the abundance of perennial rhizomatous graminoids. Moreover, complete litter removal shifted plant community composition from grass‐dominated to forb‐dominated and reduced species and functional group asynchrony, resulting in lower ecosystem temporal stability.Our results suggest that ecological processes that lead to reduction in litter, such as burning, grazing, and haying, may render ecosystems more vulnerable and impair the capacity of grasslands to withstand drought events. [ABSTRACT FROM AUTHOR]

Published
2024
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48. Plant diversity enhances productivity and soil carbon storage

Author

Chen, Shiping, Wang, Wantong, Xu, Wenting, Wang, Yang, Wan, Hongwei, Chen, Dima, Tang, Zhiyao, Tang, Xuli, Zhou, Guoyi, Xie, Zongqiang, Zhou, Daowei, Shangguan, Zhouping, Huang, Jianhui, He, Jin-Sheng, Wang, Yanfen, Sheng, Jiandong, Tang, Lisong, Li, Xinrong, Dong, Ming, Wu, Yan, Wang, Qiufeng, Wang, Zhiheng, Wu, Jianguo, Chapin, F. Stuart, and Bai, Yongfei

Published
2018

49. Effects of national ecological restoration projects on carbon sequestration in China from 2001 to 2010

Author

Lu, Fei, Hu, Huifeng, Sun, Wenjuan, Zhu, Jiaojun, Liu, Guobin, Zhou, Wangming, Zhang, Quanfa, Shi, Peili, Liu, Xiuping, Wu, Xing, Zhang, Lu, Wei, Xiaohua, Dai, Limin, Zhang, Kerong, Sun, Yirong, Xue, Sha, Zhang, Wanjun, Xiong, Dingpeng, Deng, Lei, Liu, Bojie, Zhou, Li, Zhang, Chao, Zheng, Xiao, Cao, Jiansheng, Huang, Yao, He, Nianpeng, Zhou, Guoyi, Bai, Yongfei, Xie, Zongqiang, Tang, Zhiyao, Wu, Bingfang, Fang, Jingyun, Liu, Guohua, and Yu, Guirui

Published
2018

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