Plant communities on sandbars were important, and restoration of degraded wetland were significant to biological conservation in the East Dongting Lake region. In this study, typical wetland community types on sandbar...Plant communities on sandbars were important, and restoration of degraded wetland were significant to biological conservation in the East Dongting Lake region. In this study, typical wetland community types on sandbars and their site elevation were surveyed to explore relationship between community distribution and site elevation. Results show that eight major communities in this region were wetland communities dominated by Juncus effusus, Carex brevicuspis, Polygonum hydropiper, Salix triandra, Oenanthe Javanica, Phalaris arundinacea, Miscanthus sacchariflorus and Phragmites communis respectively. These communities had obvious constructive species and companion species, while site elevation could affect community composition and their species diversity. On sandbars in the East Dongting Lake, vegetation was largely composed of hygrophytes companied with a few mesophytes. The higher the site elevation was, the nearer the site was to the water, and the lower community diversity became. Except soil humidity and site elevation, growth period of plants after inundation could also affect species richness in the communities.展开更多
Yellow River delta （YRD） is one of the biggest deltas that there is a large area of wetland in the world. Thanks to soil （sands） sediment carried by the Yellow River, there was averagely the newly formed land 21.3...Yellow River delta （YRD） is one of the biggest deltas that there is a large area of wetland in the world. Thanks to soil （sands） sediment carried by the Yellow River, there was averagely the newly formed land 21.3 km^2 in YRD. During the development of petroleum industry and urban expansion, wetlands were degraded due to population growth, irrational land use, in addition to adverse natural eco-environment such as lower precipitation, higher soil evaporation and soil salinazation. The major ecological measures to restore degraded wetland concerned with ensuring water supply, especially establishing perfect irrigation works; protecting virgin plant communities and assisting them to regenerate by the way of site preparation, improving living surroundings; introducing salt-tolerant plants to increase vegetation species and plant coverage, thereby enhancing the capability of wetland to combat contamination and pollution through plant remediation, uptake, absorption, etc. Finally making a comprehensive land use plan, accordingly removing deleterious facilities.展开更多
目的:采用系统评价的方法探讨培美曲塞联合顺铂(PC)对比吉西他滨联合顺铂(GC)治疗中国晚期初治非小细胞肺癌(NSCLC)的临床效果。方法:计算机检索PubMed、web of science、The Cochrane Library、CNKI、VIP、CBM、万方数据库收集PC对比G...目的:采用系统评价的方法探讨培美曲塞联合顺铂(PC)对比吉西他滨联合顺铂(GC)治疗中国晚期初治非小细胞肺癌(NSCLC)的临床效果。方法:计算机检索PubMed、web of science、The Cochrane Library、CNKI、VIP、CBM、万方数据库收集PC对比GC一线治疗晚期非小细胞肺癌的随机对照试验(RCT),根据Cochrane评价手册5.0版对纳入进行文献质量评价,采用Revman5.3软件对数据进行meta分析。结果:共纳入8个RCT,共801例患者。Meta分析结果显示PC方案的有效率明显提高(OR=1.28,95%CI:1.10-1.49,P=0.001);但亚组分析结果显示非鳞非小细胞癌组PC方案与GC方案疗效相似(P=0.05,OR=1.52,95%CI:1.00-2.30)。血小板减少的发生率、血红蛋白减少的发生率以及肝功能损害的发生率均显著降低。但两方案之间的疾病控制率、1年生存率、粒细胞减少发生率、恶心/呕吐发生率无显著差异。结论:PC方案一线治疗中国初治非鳞小细胞肺癌有效率与GC方案相当。但本次研究仍存在较多的局限性,两方案对比疗效如何,仍需更多的临床研究证实。展开更多
基金supported by the National Key Technology R&D Program (2006BAD03A15)
文摘Plant communities on sandbars were important, and restoration of degraded wetland were significant to biological conservation in the East Dongting Lake region. In this study, typical wetland community types on sandbars and their site elevation were surveyed to explore relationship between community distribution and site elevation. Results show that eight major communities in this region were wetland communities dominated by Juncus effusus, Carex brevicuspis, Polygonum hydropiper, Salix triandra, Oenanthe Javanica, Phalaris arundinacea, Miscanthus sacchariflorus and Phragmites communis respectively. These communities had obvious constructive species and companion species, while site elevation could affect community composition and their species diversity. On sandbars in the East Dongting Lake, vegetation was largely composed of hygrophytes companied with a few mesophytes. The higher the site elevation was, the nearer the site was to the water, and the lower community diversity became. Except soil humidity and site elevation, growth period of plants after inundation could also affect species richness in the communities.
基金Supported by the National Tenth Five-year Key Scientific & Technological Project (Grant No. 2004BA516A13)Shandong Provincial Key Scientific & Technological Project of Plant Community Restoration in Yellow River Delta Region
文摘Yellow River delta （YRD） is one of the biggest deltas that there is a large area of wetland in the world. Thanks to soil （sands） sediment carried by the Yellow River, there was averagely the newly formed land 21.3 km^2 in YRD. During the development of petroleum industry and urban expansion, wetlands were degraded due to population growth, irrational land use, in addition to adverse natural eco-environment such as lower precipitation, higher soil evaporation and soil salinazation. The major ecological measures to restore degraded wetland concerned with ensuring water supply, especially establishing perfect irrigation works; protecting virgin plant communities and assisting them to regenerate by the way of site preparation, improving living surroundings; introducing salt-tolerant plants to increase vegetation species and plant coverage, thereby enhancing the capability of wetland to combat contamination and pollution through plant remediation, uptake, absorption, etc. Finally making a comprehensive land use plan, accordingly removing deleterious facilities.
文摘目的:采用系统评价的方法探讨培美曲塞联合顺铂(PC)对比吉西他滨联合顺铂(GC)治疗中国晚期初治非小细胞肺癌(NSCLC)的临床效果。方法:计算机检索PubMed、web of science、The Cochrane Library、CNKI、VIP、CBM、万方数据库收集PC对比GC一线治疗晚期非小细胞肺癌的随机对照试验(RCT),根据Cochrane评价手册5.0版对纳入进行文献质量评价,采用Revman5.3软件对数据进行meta分析。结果:共纳入8个RCT,共801例患者。Meta分析结果显示PC方案的有效率明显提高(OR=1.28,95%CI:1.10-1.49,P=0.001);但亚组分析结果显示非鳞非小细胞癌组PC方案与GC方案疗效相似(P=0.05,OR=1.52,95%CI:1.00-2.30)。血小板减少的发生率、血红蛋白减少的发生率以及肝功能损害的发生率均显著降低。但两方案之间的疾病控制率、1年生存率、粒细胞减少发生率、恶心/呕吐发生率无显著差异。结论:PC方案一线治疗中国初治非鳞小细胞肺癌有效率与GC方案相当。但本次研究仍存在较多的局限性,两方案对比疗效如何,仍需更多的临床研究证实。
