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| 1 | No Impact of Repeated Endoscopic Screens on Gastric Cancer Mortality in a Prospectively Followed Chinese Population at High Risk显示文摘 | B. Riecken R. Pfeiffer J.L. Ma M.L. Jin J.Y. Li W.D. Liu L. Zhang Y.S. Chang M.H. Gail W.C. You | 2002 | Preventive Medicine2002，，1： | 2 |
| 2 | Topotactic intercalation of a bulky organic anion (thiacalix arene) into LDH through an osmotic swelling/restoration reaction in formamide 显示文摘 | Huang Gailing Ma Shulan Yang Xiaojing | 2009 | Chem Commun2009，3，： | 1 |
| 3 | Helicobacter pylori infection and mode of transmission in a population at high risk of stomach cancer 显示文摘 | Ma JL You WC Gail MH | 1998 | Int J Epidemiol1998，27，： | 1 |
| 4 | Diversity of soil bacteria and fungi communities in artificial forests of the sandy-hilly region of Northwest China显示文摘Soil erosion is a serious issue in the sandy-hilly region of Shanxi Province,Northwest China.There has been gradual improvement due to vegetation restoration,but soil microbial community characteristics in different vegetation plantation types have not been widely investigated.To address this,we analyzed soil bacterial and fungal community structures,diversity,and microbial and soil environmental factors in Caragana korshinskii Kom.,Populus tomentosa Carr.,Populus simonii Carr.,Salix matsudana Koidz,and Pinus tabulaeformis Carr.forests.There were no significant differences in the dominant bacterial community compositions among the five forest types.The alpha diversity of the bacteria and fungi communities showed that ACE(abundance-based coverage estimator),Chao1,and Shannon indices in C.korshinskii forest were significantly higher than those in the other four forest types(P<0.05).Soil organic matter,total nitrogen,and urease had a greater impact on bacterial community composition,while total nitrogen,β-glucosidase,and urease had a greater impact on fungal community composition.The relative abundance of beneficial and pathogenic microorganisms was similar across all forest types.Based on microbial community composition,diversity,and soil fertility,we ranked the plantations from most to least suitable as follows:C.korshinskii,S.matsudana,P.tabulaeformis,P.tomentosa,and P.simonii. | GOU Qianqian MA Gailing QU Jianjun WANG Guohua | 2023 | Journal of Arid Land2023，15，1： | 0 |
| 5 | Succession of soil bacterial and fungal communities of Caragana korshinskii plantation in a typical agro-pastoral ecotone in northern China over a 50-a period显示文摘Bacterial and fungal communities play critical roles in reestablishing vegetation structure,function and biodiversity in ecosystem restoration in arid and semi-arid areas.However,the long-term successional changes in bacterial and fungal communities that occur with artificial vegetation development are not fully understood.In this study,we investigated the successional changes in bacterial and fungal communities in Caragana korshinskii Kom.plantation over a period of 50 a(6,12,18,40 and 50 a)and their relationships with key soil environmental factors in a typical agro-pastoral ecotone,northern China.The results showed that bacterial and fungal diversities(α-andβ-diversity)were significantly affected by plantation age;moreover,the change in fungal community was more evident than that in bacterial community.Soil samples from 12 a plantation had the highest(P<0.05)bacterial and fungalα-diversity(i.e.,abundance-based coverage estimator(ACE)and Chao1 index)at 0-10 cm depth compared with other samples.However,soil samples from plantation at the late recovery stage(40-50 a)had the highestα-diversity at 10-20 cm depth.Soil bacterial community was not significantly affected by plantation age at the genus level;but,soil fungal community was significantly affected at the genus level.Overall,Mortierella and Chaetomium were the dominant genera at natural recovery stage(0 a);Inocybe was the dominant genus at the early recovery stage(6-12 a);Inocybe and Mortierella were the dominant genera at the mid-recovery stage(12-40 a);And Mortierella,Cladosporium and Humicola were the dominant genera at the late recovery stage(40-50 a).Redundancy analysis(RDA)showed thatβ-glucosidase activity,total nitrogen and soil organic carbon were closely associated with bacterial community composition,while alkaline phosphatase,urease activity and total nitrogen were associated with fungal community composition,indicating that changes in enzyme activity and soil nutrients were the most important determinants of dominant genera.Furthermore,pathogenic microorganisms(Cladosporium and Humicola)were dominant in soils from 40-50 a plantation,which may affect plant growth,resulting in the decline of C.korshinskii plantation.Overall,the findings of this study improve the understanding of ecological patterns of bacterial and fungal communities in artificial vegetation and provide an important scientific basis for comprehensive ecological restoration management in arid and semi-arid areas. | MA Gailing GOU Qianqian WANG Guohua QU Jianjun | 2021 | Journal of Arid Land2021，13，10： | 0 |
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