中文摘要：

土壤 salinization 或碱性化是土壤 desertification 的一种形式。沿海的盐碱的土壤在大陆海洋接口在生态系统的网络代表沙漠和一个关键系统的一种类型。Tamarix chinensis 是在 Bohai 海湾的沿海的盐碱的土壤是广泛地分布式的干旱容忍的植物，中国。在这研究，我们使用了 454 种 pyrosequencing 技术在 T 的沿海的盐碱的土壤调查微生物引起的差异的特征和分发。在 Bohai 海湾的 chinensis 树林。20,315 个序列的一个总数被获得，代表 19 已知的细菌的数和在门水平的未分类的细菌的一个大比例。Proteobacteria， Acidobacteria 和 Actinobacteria 是占优势的数。T 的范围。chinensis 影响了微生物引起的作文。在门水平，而 Actinobacteria 与 T 的增加的范围增加了，相对许多 -Proteobacteria 和 Bacteroidetes 减少了。chinensis。在类水平，而 Nocardioides 的比例增加了， Steroidobacter， Lechevalieria， Gp3 和 Gp4 的比例随植被范围的增加减少了。簇分析证明存在 T。chinensis 在沿海的盐碱的土壤为微生物改变了壁龛，它在微生物引起的社区引起了变化。分析也稠密的区域和稀少的区域把边缘的区域的微生物引起的社区结构与那些区分开来。而且，结果也显示到海岸线的距离能也在这沿海的盐碱的土壤影响某些组土壤细菌，例如家庭 Cryomorphaceae 和班 Flavobacteria，其人口作为距离减少了，增加了。另外，海水和温度能是影响了变化的开车因素。

英文摘要：

Soil salinization or alkalization is a form of soil desertification. Coastal saline-alkali soil represents a type of desert and a key system in the network of ecosystems at the continent-ocean interface. Tamarix chinensis is a drought-tolerant plant that is widely distributed in the coastal saline-alkali soil of Bohai Bay, China. In this study, we used 454 pyrosequencing techniques to investigate the characteristics and distribution of the microbial diversity in coastal saline-alkali soil of the T. chinensis woodland at Bohai Bay. A total of 20,315 sequences were obtained, representing 19 known bacterial phyla and a large proportion of unclassified bacteria at the phylum level. Proteobacteria, Acidobacteria and Actinobacteria were the predominant phyla. The coverage of T. chinensis affected the microbial composition. At the phylum level, the relative abundance of y-Proteobacteria and Bacteroidetes decreased whereas Actinobacteria increased with the increasing coverage of T. chinensis. At the genus level, the proportions of Steroidobacter, Lechevalieria, Gp3 and Gp4 decreased with the increase of the vegetation coverage whereas the proportion of Nocardioides increased. A cluster analysis showed that the existing T. chinensis changed the niches for the microorganisms in the coastal saline-alkali soil, which caused changes in the microbial community. The analysis also distinguished the microbial community structure of the marginal area from those of the dense area and sparse area. Furthermore, the results also indicated that the distance to the seashore line could also affect certain groups of soil bacteria in this coastal saline-alkali soil, such as the family Cryomorphaceae and class Flavobacteria, whose population decreased as the distance increased. In addition, the seawater and temperature could be the driving factors that affected the changes.