Spatial distribution of bacterial communities driven by multiple environmental factors in a beach wetland of the largest freshwater lake in China.
Spatial distribution of bacterial communities driven by multiple environmental factors in a beach wetland of the largest freshwater lake in China.
复制标题
多重环境因素驱动下中国最大淡水湖滩涂湿地细菌群落空间分布
DOI：
10.3389/fmicb.2015.00129
复制
发表时间：
2015
影响因子：
5.2
通讯作者：
Nie M
中科院分区：
文献类型：
--
作者：
Ding X;Peng XJ;Jin BS;Xiao M;Chen JK;Li B;Fang CM;Nie M
细菌群落的空间分布可能受多种环境因素的影响。因此，了解细菌分布与环境因素之间的关系对于了解湿地稳定性和淡水湖的功能至关重要。然而，关于深层沉积物中细菌群落的研究很少。本研究从渤阳湖滩涂湿地水平(距水陆交界处)和垂直(沉积物深度)两个方向构建了30个16S rRNA克隆文库，以评价沉积物性质对细菌群落结构和多样性的影响。我们的结果表明，细菌多样性沿水平梯度增加，沿垂直梯度减少。沿梯度的非均质沉积物性质在很大程度上影响了门和种水平上的优势细菌群。例如，NH+4浓度随深度的增加而降低，这与α变形杆菌的相对丰度呈正相关。细菌多样性和优势菌群的变化表明，表层的细菌群落结构与深层不同。主成分分析表明，两个梯度，而不是每个梯度独立地促成了细菌群落结构的变化。多元线性回归模型解释了细菌多样性和丰富度沿深度和距离梯度的变化。总体而言，我们的结果表明，与沉积物特性相关的空间梯度塑造了鄱阳湖滩涂湿地的细菌群落。
The spatial distributions of bacterial communities may be driven by multiple environmental factors. Thus, understanding the relationships between bacterial distribution and environmental factors is critical for understanding wetland stability and the functioning of freshwater lakes. However, little research on the bacterial communities in deep sediment layers exists. In this study, thirty clone libraries of 16S rRNA were constructed from a beach wetland of the Poyang Lake along both horizontal (distance to the water-land junction) and vertical (sediment depth) gradients to assess the effects of sediment properties on bacterial community structure and diversity. Our results showed that bacterial diversity increased along the horizontal gradient and decreased along the vertical gradient. The heterogeneous sediment properties along gradients substantially affected the dominant bacterial groups at the phylum and species levels. For example, the NH+4 concentration decreased with increasing depth, which was positively correlated with the relative abundance of Alphaproteobacteria. The changes in bacterial diversity and dominant bacterial groups showed that the top layer had a different bacterial community structure than the deeper layers. Principal component analysis revealed that both gradients, not each gradient independently, contributed to the shift in the bacterial community structure. A multiple linear regression model explained the changes in bacterial diversity and richness along the depth and distance gradients. Overall, our results suggest that spatial gradients associated with sediment properties shaped the bacterial communities in the Poyang Lake beach wetland.
登录
查看更多内容
影响因子：
4.5
作者：
Berg, P;Risgaard-Petersen, N;Rysgaard, S
通讯作者：
Rysgaard, S
影响因子：
4.2
作者：
Haglund, AL;Lantz, P;Tranvik, L
通讯作者：
Tranvik, L
影响因子：
4.4
作者：
Lin, X.;Green, S.;Kostka, J. E.
通讯作者：
Kostka, J. E.
影响因子：
3.6
作者：
Cookson, W. R.;O'Donnell, A. J.;Murphy, D. V.
通讯作者：
Murphy, D. V.
溶解有机碳对中国自然湿地生态系统产甲烷古菌群落空间变异的影响
影响因子：
5
作者：
Liu, Deyan;Ding, Weixin;Cai, Zucong
通讯作者：
Cai, Zucong