降水对古尔班通古特沙漠细菌群落多样性和构建过程的影响

杜芳, 荣晓莹, 徐鹏, 尹本丰, 张元明

Bacterial diversity and community assembly responses to precipitation in the Gurbantunggut Desert

Fang Du, Xiaoying Rong, Peng Xu, Benfeng Yin, Yuanming Zhang

图1 区域降水差异对不同丰度细菌群落结构的影响。(a)基于Bray-Curtis距离的细菌群落结构非度量多维尺度排序。(b)降水对细菌群落Bray-Curtis相异分布指数的影响, 不同字母表示Bray-Curtis相异分布指数在不同降水梯度间的差异显著(P < 0.05)。(c)系统发育距离-衰减曲线显示群落相似性(1 ? βMNTD)与采样点之间地理距离的关系。CNW: 彩南西; CNN: 彩南北; YZ: 一站; SXS: 石西南; SXE: 石西东。

Fig. 1 The structure of bacterial communities with different abundances differed along the precipitation gradient. (a) Non-metric multidimensional scaling (NMDS) ordination based on Bray-Curtis similarity. (b) Effect of mean annual precipitation on the Bray-Curtis dissimilarity of bacterial communities, different letters indicate significant differences in Bray-Curtis dissimilarity between different precipitation gradients (P < 0.05). (c) Phylogenetic distance-decay curves showing community similarity (1 - βMNTD metric) against geographic distances between sampling sites.