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| 1 | Climate and litter C/N ratio constrain soil organic carbon accumulation显示文摘Soil organic carbon(SOC) plays critical roles in stabilizing atmospheric CO2 concentration, but the mechanistic controls on the amount and distribution of SOC on global scales are not well understood. In turn, this has hampered the ability to model global C budgets and to find measures to mitigate climate change. Here, based on the data from a large field survey campaign with 2600 plots across China’s forest ecosystems and a global collection of published data from forested land, we find that a low litter carbon-to-nitrogen ratio(C/N) and high wetness index(P/PET, precipitation-to-potentialevapotranspiration ratio) are the two factors that promote SOC accumulation, with only minor contributions of litter quantity and soil texture. The field survey data demonstrated that high plant diversity decreased litter C/N and thus indirectly promoted SOC accumulation by increasing the litter quality. We conclude that any changes in plant-community composition, plant-species richness and environmental factors that can reduce the litter C/N ratio, or climatic changes that increase wetness index, may promote SOC accumulation. The study provides a guideline for modeling the carbon cycle of various ecosystem scales and formulates the principle for land-based actions for mitigating the rising atmospheric CO2 concentration. | Guoyi Zhou Shan Xu Philippe Ciais Stefano Manzoni Jingyun Fang Guirui Yu Xuli Tang Ping Zhou Wantong Wang Junhua Yan Gengxu Wang Keping Ma Shenggong Li Sheng Du Shijie Han Youxin Ma Deqiang Zhang Juxiu Liu Shizhong Liu Guowei Chu Qianmei Zhang Yuelin Li Wenjuan Huang Hai Ren Xiankai Lu Xiuzhi Chen | 2019 | National Science Review2019，6，4： | 21 |
| 2 | Soil - atmospheric exchange of CO2, CH4 and N2O in three subtropical forest ecosystems in southern China 显示文摘 | Xuli tang Shuguang liu Guoyi zhou | 2006 | Global Change Biology2006，12，： | 1 |
| 3 | Optimization of Sample Pretreatment for Determination of Polycyclic Aromatic Hydrocarbons in Estuarine Sediments by Gas Chromatography显示文摘This study examined levels of polycyclic aromatic hydrocarbons (PAHs) in estuarine sediments in Licun (Qingdao, China) by gas chromatography under optimized conditions for sample pretreatment via ultrasonic extraction, column chromatography, and thin layer chromatography. Methanol and dichloromethane (DCM)/methanol (2:1, v/v) were used in ultrasonic extraction, and DCM was used as eluate for column chromatography. The developing system consisted of n-hexane and DCM at a ratio of 9:1 (v/v), with DCM as the extraction solvent for PAHs-containing silica gel scraped off the plate. When the spiking level is 100 ng, total recoveries of spiked matrices for four target PAHs (phenanthrene, anthracene, pyrene and chrysene) were 83.7%, 76.4%, 85.8%, and 88.7%, respectively, with relative standard deviation (RSD) between 5.0% and 6.5% (n = 4). When the spiking level is 1000 ng, associated total recoveries were 78.6%, 72.7%, 82.7% and 85.3%, respectively, with RSD between 4.4% and 5.3% (n = 4). The opti-mized method was advantageous for determination of PAHs in complex matrix due to its effective sample purification. | WANG Yan LI Xianguo PENG Xuewei TANG Xuli DENG Xiaoyan | 2012 | Journal of Ocean University of China2012，11，2： | 1 |
| 4 | Kalihioxepanes A-G:Seven Kalihinene Diterpenoids from Marine Sponge Acanthella cavernosa Collected off the South China Sea显示文摘Comprehensive Summary Seven new kalihinene diterpenoids,kalihioxepanes A-G(1-7)bearing a rare oxepane ring,were isolated from sponge Acanthella cavernosa collected from the South China Sea.The structures and absolute configurations were elucidated by comprehensive spectroscopic analysis,single crystal X-ray diffraction,and quantum chemical calculation methods.Kalihioxepane A(1)displayed strong cytotoxicity against H69 and K562 tumor cells,while kalihioxepane B(2)showed moderate cytotoxicity against K562 cells. | Zhe Wang Xiao Han Guoping Liu Di Zhang Huiyue Hou Li Xiao Nicole J.de Voogd Xuli Tang Pinglin Li | 2022 | Chinese Journal of Chemistry2022，40，15： | 1 |
| 5 | Optimized One-Step Preparation of a Bioactive Natural Product,Guaiazulene-2,9-dione显示文摘We previously isolated a natural product, namely guaiazulene-2,9-dione showing strong antibacterial activity against Vibrio anguillarum, from a gorgonian Muriceides collaris collected in South China Sea. In this experiment, guaiazulene-2,9-dione was quantitatively synthesized with an optimized one-step bromine oxidation method using guaiazulene as the raw material. The key reaction condition including reaction time and temperature, drop rate of bromine, concentration of aqueous THF solution, respective molar ratio of guaiazulene to bromine and acetic acid, and concentration of guaiazulene in aqueous THF solution, were investigated individually at five levels each for optimization. Combined with the verification test to show the absolute yield of each optimization step, the final optimal condition was determined as: when a solution of 0.025 mmol m L-1 guaiazulene in 80% aqueous THF was treated with four volumes of bromine at a drop rate of 0.1 m L min-1 and four volumes of acetic acid at-5℃ for three hours, the yield of guaiazulene-2,9-dione was 23.72%. This was the first report concerning optimized one-step synthesis to provide a convenient method for the large preparation of guaiazulene-2,9-dione. | CHENG Canling LI Pinglin WANG Wei SHI Xuefeng ZHANG Gang ZHU Hongyan WU Rongcui TANG Xuli LI Guoqiang | 2014 | Journal of Ocean University of China2014，13，6： | 0 |
| 6 | Plant community and soil properties drive arbuscular mycorrhizal fungal diversity:A case study in tropical forests显示文摘The mutual interdependence of plants and arbuscular mycorrhizal fungi(AMF)is important in carbon and mineral nutrient exchange.However,an understanding of how AMF community assemblies vary in different forests and the underlying factors regulating AMF diversity in native tropical forests is largely unknown.We explored the AMF community assembly and the underlying factors regulating AMF diversity in a young(YF)and an old-growth forest(OF)in a tropical area.The results showed that a total of 53 AMF phylogroups(virtual taxa,VTs)were detected,38±1 in the OF and 34±1 in the YF through high-throughput sequencing of 18S rDNA,and AMF community composition was significantly different between the two forests.A structural equation model showed that the forest traits indirectly influenced AMF diversity via the plant community,soil properties and microbes,which explained 44.2%of the total observed variation in AMF diversity.Plant diversity and biomass were the strongest predictors of AMF diversity,indicating that AMF diversity was dominantly regulated by biotic factors at our study sites.Our study indicated that forest community traits have a predictable effect on the AMF community;plant community traits and soil properties are particularly important for determining AMF diversity in tropical forests. | Jing Zhang Changxin Quan Lingling Ma Guowei Chu Zhanfeng Liu Xuli Tang | 2021 | Soil Ecology Letters2021，3，1： | 0 |
| 7 | Clavukoelloids A—M,Thirteen Rare N-Containing Nardosinane Type Sesquiterpenoids from the Soft Coral Clavularia koellikeri显示文摘Thirteen new nitrogen-containing nardosinane-type sesquiterpenoids,clavukoelloids A-M(1-13)with unique acrylamide fragments vs.the reported general nardosinane-type sesquiterpenoids containing lactone,were isolated from the soft coral Clavularia koellikeri collected from the South China Sea.The structures and absolute configurations of new compounds were unambiguously determined by analysis of spectroscopic data,CP3,DP4+,ECD spectra,and X-ray diffraction.Compound 6 showed anti-inflammatory activities and hepatoprotective activities in transgenic fluorescent zebrafish. | Xiao Han Zhe Wang Anran Fu Kun Liu Zongchen Ma Xuli Tang Dahai Zhang Guoqiang Li | 2023 | Chinese Journal of Chemistry2023，41，12： | 0 |
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