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  1. Article ; Online: Differential responses of soil extracellular enzyme activity and stoichiometry to precipitation changes in a poplar plantation.

    Sun, Yuan / Chen, Xinli

    Environmental research

    2023  Volume 241, Page(s) 117565

    Abstract: Changes in precipitation patterns can significantly affect belowground processes. Although soil extracellular enzymes play a vital role in several biogeochemical processes, our knowledge of how precipitation changes affect soil extracellular enzyme ... ...

    Abstract Changes in precipitation patterns can significantly affect belowground processes. Although soil extracellular enzymes play a vital role in several biogeochemical processes, our knowledge of how precipitation changes affect soil extracellular enzyme activity (EEA) and stoichiometry remains insufficient. In this study, we investigated the activities of C-acquiring enzyme (β-1,4-glucosidase), N-acquiring enzymes (β-N-acetylglucosaminidase and leucine aminopeptidase), and P-acquiring enzyme (acid phosphatase) under different precipitation scenarios [ambient precipitation (CK), 30% decrease in precipitation (moderate DPT), 50% decrease in precipitation (extreme DPT), 30% increase in precipitation (moderate IPT), and 50% increase in precipitation (extreme IPT)] in a poplar plantation. We found soil EEA exhibited more pronounced increases to moderate IPT compared to moderate DPT (positive asymmetry), the opposite trend (negative asymmetry) was observed under extreme precipitation; whereas soil EEA C:N:P stoichiometry exhibited negative asymmetry at moderate precipitation changes, and exhibited positive asymmetry at extreme precipitation changes. Under moderate precipitation changes, the asymmetry of soil EEA was mainly regulated by asymmetries of respective microbial biomass and litter mass; the asymmetry of soil EEA stoichiometry was mainly regulated by asymmetries of respective soil stoichiometric ratios and litter mass. Furthermore, under extreme precipitation changes, the asymmetries of soil EEA and stoichiometry were best explained by the asymmetry of soil moisture. Our results provide the first evidence of double asymmetric responses of soil EEA and stoichiometry to precipitation changes and highlight the need to consider this asymmetry when modeling the dynamics of biogeochemical cycling in forest ecosystems.
    MeSH term(s) Soil ; Ecosystem ; Soil Microbiology ; Biomass ; Forests ; Nitrogen ; Carbon
    Chemical Substances Soil ; Nitrogen (N762921K75) ; Carbon (7440-44-0)
    Language English
    Publishing date 2023-11-14
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 205699-9
    ISSN 1096-0953 ; 0013-9351
    ISSN (online) 1096-0953
    ISSN 0013-9351
    DOI 10.1016/j.envres.2023.117565
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Phosphorus fertilization enhances terrestrial carbon cycling in phosphorus-deficient ecosystems.

    Sun, Yuan / Chen, Xinli

    Journal of environmental management

    2023  Volume 351, Page(s) 119941

    Abstract: Anthropogenic phosphorus (P) input into terrestrial soils have been greatly increased, with potential effects on both above- and belowground carbon (C) cycling processes. However, uncertainty about how plant-soil-microbe systems respond to P ... ...

    Abstract Anthropogenic phosphorus (P) input into terrestrial soils have been greatly increased, with potential effects on both above- and belowground carbon (C) cycling processes. However, uncertainty about how plant-soil-microbe systems respond to P fertilization makes it difficult to predict the effects of anthropogenic P input on the terrestrial C cycling. In this study, we conducted a global meta-analysis, examining 1183 observations from 142 publications. The findings revealed that P fertilization consistently promoted C cycling variables in plant-soil-microbe systems, resulting in improvements ranging from 7.6% to 49.8% across various ecosystem types. Notably, these positive effects of P fertilization were more pronounced with higher application rates and longer experimental durations. As the background P contents increased, the functions of P fertilization in C cycling variables shifted from positive to negative. Structural equation modeling demonstrated that changes in plant inputs predominantly drove the positive impacts of P fertilization rate and experimental duration, as well as the negative impacts of background P contents on soil respiration and microbial biomass C responses to P fertilization. Our study demonstrated the coherent responses of terrestrial C cycling processes to P fertilization and highlighted the significance of P fertilization boosting C cycling processes in P-deficient ecosystems. We suggested that minimizing the application of P fertilization in P-rich environments would enhance C sequestration and reduce P-induced environmental pollution.
    MeSH term(s) Ecosystem ; Phosphorus/chemistry ; Carbon/chemistry ; Nitrogen/analysis ; Soil/chemistry ; Plants ; Soil Microbiology ; Fertilization
    Chemical Substances Phosphorus (27YLU75U4W) ; Carbon (7440-44-0) ; Nitrogen (N762921K75) ; Soil
    Language English
    Publishing date 2023-12-30
    Publishing country England
    Document type Meta-Analysis ; Journal Article
    ZDB-ID 184882-3
    ISSN 1095-8630 ; 0301-4797
    ISSN (online) 1095-8630
    ISSN 0301-4797
    DOI 10.1016/j.jenvman.2023.119941
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Functional diversity enhances dryland forest productivity under long-term climate change.

    Hisano, Masumi / Ghazoul, Jaboury / Chen, Xinli / Chen, Han Y H

    Science advances

    2024  Volume 10, Issue 17, Page(s) eadn4152

    Abstract: Short-term experimental studies provided evidence that plant diversity increases ecosystem resilience and resistance to drought events, suggesting diversity to serve as a nature-based solution to address climate change. However, it remains unclear ... ...

    Abstract Short-term experimental studies provided evidence that plant diversity increases ecosystem resilience and resistance to drought events, suggesting diversity to serve as a nature-based solution to address climate change. However, it remains unclear whether the effects of diversity are momentary or still hold over the long term in natural forests to ensure that the sustainability of carbon sinks. By analyzing 57 years of inventory data from dryland forests in Canada, we show that productivity of dryland forests decreased at an average rate of 1.3% per decade, in concert with the temporally increasing temperature and decreasing water availability. Increasing functional trait diversity from its minimum (monocultures) to maximum value increased productivity by 13%. Our results demonstrate the potential role of tree functional trait diversity in alleviating climate change impacts on dryland forests. While recognizing that nature-based climate mitigation (e.g., planting trees) can only be partial solutions, their long-term (decadal) efficacy can be improved by enhancing functional trait diversity across the forest community.
    MeSH term(s) Climate Change ; Forests ; Biodiversity ; Trees ; Canada ; Ecosystem ; Temperature
    Language English
    Publishing date 2024-04-24
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2810933-8
    ISSN 2375-2548 ; 2375-2548
    ISSN (online) 2375-2548
    ISSN 2375-2548
    DOI 10.1126/sciadv.adn4152
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Mapping N deposition impacts on soil microbial biomass across global terrestrial ecosystems

    Chen, Chen / Chen, Xinli / Chen, Han Y.H.

    Geoderma. 2023 May, v. 433 p.116429-

    2023  

    Abstract: Soil microorganisms are key for biodiversity and ecosystem processes. Recent meta-analyses based on nitrogen (N) addition experiments reported an overall negative impact of elevated N on soil microbial biomass on a global scale. However, individual ... ...

    Abstract Soil microorganisms are key for biodiversity and ecosystem processes. Recent meta-analyses based on nitrogen (N) addition experiments reported an overall negative impact of elevated N on soil microbial biomass on a global scale. However, individual studies have reported divergent effects of N addition, ranging from strongly negative to even positive. Moreover, N deposition varies temporally and spatially worldwide. It remains uncertain how the effects of N deposition on soil microbial biomass vary across global terrestrial ecosystems over time. Through the synthesis of 374 N addition experiments across six continents, we revealed that low quantities of N increased the soil microbial biomass, but high N amounts strongly reduced it. Moreover, the N addition effects were strongly contingent on the ecosystem type, being highly negative in grasslands (−19.3 ± 6.2%, mean and 95% confidence intervals), negative in forests (−8.6 ± 4.2%), and positive in croplands (15.1 ± 12.3%). Further, the soil microbial biomass was most negatively affected by N addition in acidic soils. By combining our meta-analysis results from N addition experiments and global N deposition data, we revealed that the global soil microbial biomass increased by 10.0% in response to cumulative N deposition from 2000–2020. However, regions encompassing the Eastern U.S., Southern Brazil, Europe, and Eastern Asia, with high N deposition rates and large forested areas of acidic soils, were hotspots for microbial biomass loss. Our findings challenge the long-held notion that N deposition has universal negative impacts on soil microbial biomass. Instead, we show that the N deposition impacts on soil microbial biomass are dependent on the amounts of elevated N, ecosystem type, and soil pH, for which N-deposition-induced soil acidification acts as an internal mechanism.
    Keywords biodiversity ; ecosystems ; meta-analysis ; microbial biomass ; nitrogen ; soil acidification ; soil pH ; Brazil ; East Asia ; Eastern United States ; Europe ; Global map ; N deposition ; Soil microbial biomass
    Language English
    Dates of publication 2023-05
    Publishing place Elsevier B.V.
    Document type Article ; Online
    Note Use and reproduction
    ZDB-ID 281080-3
    ISSN 1872-6259 ; 0016-7061
    ISSN (online) 1872-6259
    ISSN 0016-7061
    DOI 10.1016/j.geoderma.2023.116429
    Database NAL-Catalogue (AGRICOLA)

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  5. Article ; Online: Plant mixture balances terrestrial ecosystem C:N:P stoichiometry.

    Chen, Xinli / Chen, Han Y H

    Nature communications

    2021  Volume 12, Issue 1, Page(s) 4562

    Abstract: Plant and soil C:N:P ratios are of critical importance to productivity, food-web dynamics, and nutrient cycling in terrestrial ecosystems worldwide. Plant diversity continues to decline globally; however, its influence on terrestrial C:N:P ratios remains ...

    Abstract Plant and soil C:N:P ratios are of critical importance to productivity, food-web dynamics, and nutrient cycling in terrestrial ecosystems worldwide. Plant diversity continues to decline globally; however, its influence on terrestrial C:N:P ratios remains uncertain. By conducting a global meta-analysis of 2049 paired observations in plant species mixtures and monocultures from 169 sites, we show that, on average across all observations, the C:N:P ratios of plants, soils, soil microbial biomass and enzymes did not respond to species mixture nor to the species richness in mixtures. However, the mixture effect on soil microbial biomass C:N changed from positive to negative, and those on soil enzyme C:N and C:P shifted from negative to positive with increasing functional diversity in mixtures. Importantly, species mixture increased the C:N, C:P, N:P ratios of plants and soils when background soil C:N, C:P, and N:P were low, but decreased them when the respective background ratios were high. Our results demonstrate that plant mixtures can balance terrestrial plant and soil C:N:P ratios dependent on background soil C:N:P. Our findings highlight that plant diversity conservation does not only increase plant productivity, but also optimizes ecosystem stoichiometry for the diversity and productivity of today's and future vegetation.
    MeSH term(s) Biodiversity ; Biomass ; Carbon/analysis ; Ecosystem ; Nitrogen/analysis ; Phosphorus/analysis ; Plants/chemistry ; Soil/chemistry ; Soil Microbiology
    Chemical Substances Soil ; Phosphorus (27YLU75U4W) ; Carbon (7440-44-0) ; Nitrogen (N762921K75)
    Language English
    Publishing date 2021-07-27
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2553671-0
    ISSN 2041-1723 ; 2041-1723
    ISSN (online) 2041-1723
    ISSN 2041-1723
    DOI 10.1038/s41467-021-24889-w
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Rare Case of Large Bowel Obstruction Caused by Giant Rectal Laterally Spreading Tumor.

    Chen, Yuxuan / Chen, Xinli / He, Ruonan / Liu, Yongpan / Chen, Lingling / Yu, Jingxia / Zhang, Shuo

    Gastrointestinal endoscopy

    2024  

    Language English
    Publishing date 2024-02-01
    Publishing country United States
    Document type Journal Article
    ZDB-ID 391583-9
    ISSN 1097-6779 ; 0016-5107
    ISSN (online) 1097-6779
    ISSN 0016-5107
    DOI 10.1016/j.gie.2024.01.039
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Co-applied biochar and PGPB promote maize growth and reduce CO

    Zou, Yiping / Chen, Xinli / Zhang, Shuyue / Zhang, Ben / Bai, Yunxing / Zhang, Tao / Jia, Jianli

    Journal of environmental management

    2024  Volume 354, Page(s) 120280

    Abstract: Coal mining is one of the human activities that has the greatest impact on the global carbon (C) cycle and biodiversity. Biochar and plant growth-promoting bacteria (PGPB) have been both used to improve coal mining degraded soils; however, it is ... ...

    Abstract Coal mining is one of the human activities that has the greatest impact on the global carbon (C) cycle and biodiversity. Biochar and plant growth-promoting bacteria (PGPB) have been both used to improve coal mining degraded soils; however, it is uncertain whether the effects of biochar application on soil respiration and microbial communities are influenced by the presence or absence of PGPB and soil nitrogen (N) level in coal mining degraded soils. A pot experiment was carried out to examine whether the effects of biochar addition (0, 1, 2 and 4% of soil mass) on soil properties, soil respiration, maize growth, and microbial communities were altered by the presence or absence of PGPB (i.e. Sphingobium yanoikuyae BJ1) (0, 200 mL suspension (2 × 10
    MeSH term(s) Humans ; Zea mays ; Coal Mining ; Carbon Dioxide/metabolism ; Soil ; Soil Microbiology ; Charcoal/metabolism ; Bacteria
    Chemical Substances biochar ; Carbon Dioxide (142M471B3J) ; Soil ; Charcoal (16291-96-6)
    Language English
    Publishing date 2024-02-13
    Publishing country England
    Document type Journal Article
    ZDB-ID 184882-3
    ISSN 1095-8630 ; 0301-4797
    ISSN (online) 1095-8630
    ISSN 0301-4797
    DOI 10.1016/j.jenvman.2024.120280
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Geomagnetic activity affects animal myocardial ischemia/reperfusion injury: an experimental-simulated study.

    Chang, Weiyu / Chen, Xinli / Yang, Yuan / Deng, Yanglin / Dong, Liang / Wu, Hui

    International journal of biometeorology

    2024  Volume 68, Issue 4, Page(s) 731–742

    Abstract: Numerous studies have shown that geomagnetic activity (GMA) contributes to the development and escalation of cardiovascular disease (CVD), as well as increased morbidity and mortality. However, the underlying molecular mechanisms and approaches for ... ...

    Abstract Numerous studies have shown that geomagnetic activity (GMA) contributes to the development and escalation of cardiovascular disease (CVD), as well as increased morbidity and mortality. However, the underlying molecular mechanisms and approaches for understanding GMA remain unclear. This study aimed to investigate the impact of GMA on oxidative stress and inflammatory responses. Myocardial ischemia/reperfusion injury (MI/RI) rat models were created under various geomagnetic field conditions. The range of cardiac function, markers of myocardial injury, inflammatory factors, and the TLR4/NF-κB signaling pathway were measured after the 24-h period. The findings showed that weak GMA significantly improved cardiac function in the MI/RI rat model and reduced the size of myocardial infarction and creatine kinase (CK) and lactic dehydrogenase (LDH) levels. Additionally, weak GMA enhanced superoxide dismutase (SOD) activity and decreased malondialdehyde (MDA) content. Furthermore, weak GMA significantly reduced the levels of the myocardial inflammatory cytokines interleukin-1 (IL-1), interleukin-6 (IL-6), and tumor necrosis factor-α (TNF-α). Conversely, the effects observed under severe GMA conditions were opposite to those observed under weak GMA. Western blot and qPCR analysis demonstrated that weak GMA led to a significant downregulation of TLR4, TRAF6, NF-κB, TNF-α, and MCP-1 in the MI/RI rat models. In contrast to weak GMA, severe GMA increased TLR4, TRAF6, NF-κB, and TNF-α expression. This study suggested that weak GMA had a limiting effect on MI/RI rat models, whereas severe GMA exacerbated injury in MI/RI rats. These effects were associated with oxidative stress and inflammatory responses and might potentially involve the TLR4/NF-κB signaling pathway.
    MeSH term(s) Rats ; Animals ; NF-kappa B/metabolism ; Myocardial Reperfusion Injury/metabolism ; Myocardial Reperfusion Injury/pathology ; Tumor Necrosis Factor-alpha/metabolism ; Toll-Like Receptor 4/genetics ; Toll-Like Receptor 4/metabolism ; TNF Receptor-Associated Factor 6/metabolism
    Chemical Substances NF-kappa B ; Tumor Necrosis Factor-alpha ; Toll-Like Receptor 4 ; TNF Receptor-Associated Factor 6
    Language English
    Publishing date 2024-01-10
    Publishing country United States
    Document type Journal Article
    ZDB-ID 280324-0
    ISSN 1432-1254 ; 0020-7128
    ISSN (online) 1432-1254
    ISSN 0020-7128
    DOI 10.1007/s00484-024-02618-4
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: The role of gut microbiota and metabolites in regulating the immune response in drug-induced enteritis.

    Chen, Yuxuan / Wang, Zhaojun / Chen, Xinli / Chao, Guanqun / Zhang, Shuo

    Journal of applied microbiology

    2023  Volume 134, Issue 3

    Abstract: Drug-induced enteritis is an inflammatory disease changing in the morphology and function of the intestine as a result of medicine damage. With the increase in drug abuse in recent years, the incidence of drug-associated enteritis accordingly rises and ... ...

    Abstract Drug-induced enteritis is an inflammatory disease changing in the morphology and function of the intestine as a result of medicine damage. With the increase in drug abuse in recent years, the incidence of drug-associated enteritis accordingly rises and becomes an important disease affecting the health and life quality of patients. Hence, elucidating the pathogenesis of drug-induced enteritis and finding cost-effective diagnostic and therapeutic tools have become current research focuses. The gut microbiota and metabolites regulate the immune response, playing a key role in the maintenance of homeostasis in the intestine. Numerous studies have found that many medicines can induce intestinal flora disorders, which are closely related to the development of drug-induced enteritis. Therefore, this paper analyses the role of gut microbiota and metabolites in regulating the immune response, and provides basic research direction and clinical reference strategies for drug-induced enteritis, taking into account the existing applications and perspectives.
    MeSH term(s) Humans ; Gastrointestinal Microbiome ; Intestines ; Enteritis/chemically induced ; Immunity
    Language English
    Publishing date 2023-02-18
    Publishing country England
    Document type Journal Article
    ZDB-ID 1358023-1
    ISSN 1365-2672 ; 1364-5072
    ISSN (online) 1365-2672
    ISSN 1364-5072
    DOI 10.1093/jambio/lxad032
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: Meta-analysis shows that plant mixtures increase soil phosphorus availability and plant productivity in diverse ecosystems.

    Chen, Xinli / Chen, Han Y H / Chang, Scott X

    Nature ecology & evolution

    2022  Volume 6, Issue 8, Page(s) 1112–1121

    Abstract: Soil phosphorus (P) availability is critical to plant productivity in many terrestrial ecosystems. How soil P availability responds to changes in plant diversity remains uncertain, despite the global crisis of rapid biodiversity loss. Our meta-analysis ... ...

    Abstract Soil phosphorus (P) availability is critical to plant productivity in many terrestrial ecosystems. How soil P availability responds to changes in plant diversity remains uncertain, despite the global crisis of rapid biodiversity loss. Our meta-analysis based on 180 studies across various ecosystems (croplands, grasslands, forests and pot experiments) shows that, on average, soil total P, phosphatase activity and available P are 6.8%, 8.5% and 4.6%, respectively, higher in species mixtures than in monocultures. The mixture effect on phosphatase activity becomes more positive with increasing species and functional group richness, with more pronounced increases in the rhizosphere than in the bulk soil. The mixture effects on soil-available P in the bulk soil do not change, but with increasing species or functional group richness these effects in the rhizosphere soil shift from positive to negative. Nonetheless, enhanced soil phosphatase activity stimulated available P in diverse species mixtures, offsetting increased plant uptake effects that decrease soil-available P. Moreover, the enhancement effects of species richness on soil phosphatase activity are positively associated with increased plant productivity. Our findings highlight that preserving plant diversity could increase soil phosphatase activity and P availability, which sustain the current and future productivity of terrestrial ecosystems.
    MeSH term(s) Ecosystem ; Phosphoric Monoester Hydrolases ; Phosphorus ; Plants ; Soil
    Chemical Substances Soil ; Phosphorus (27YLU75U4W) ; Phosphoric Monoester Hydrolases (EC 3.1.3.2)
    Language English
    Publishing date 2022-06-27
    Publishing country England
    Document type Journal Article ; Meta-Analysis ; Research Support, Non-U.S. Gov't
    ISSN 2397-334X
    ISSN (online) 2397-334X
    DOI 10.1038/s41559-022-01794-z
    Database MEDical Literature Analysis and Retrieval System OnLINE

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