西藏横断山区溪流细菌beta多样性组分对气候和水体环境的响应

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李明家¹^,², 吴凯媛¹^,³, 孟凡凡¹^,², 沈吉¹^,², 刘勇勤²^,⁴, 肖能文⁵^,^*(

), 王建军¹^,²^,^*(

)

Beta diversity of stream bacteria in Hengduan Mountains: The effects of climatic and environmental variables

Mingjia Li¹^,², Kaiyuan Wu¹^,³, Fanfan Meng¹^,², Ji Shen¹^,², Yongqin Liu²^,⁴, Nengwen Xiao⁵^,^*(

), Jianjun Wang¹^,²^,^*(

)

图3. 环境和气候因子对澜沧江和怒江两个流域的细菌总beta多样性、周转组分和嵌套组分影响的基于矩阵分析的多元回归(MRM)分析。其中实心和空心的点分别代表显著相关(P < 0.05)和不显著相关性(P > 0.05)。

Fig. 3. The environmental and climate factors related to the variance in bacterial beta diversity and its components in Lancang River and Nujiang River catchments, identified with multiple regression on distance matrices (MRM). Filled shapes and empty shapes indicate significant relationship (P < 0.05) and non-significant relationship (P > 0.05), respectively. Comp.1 and Comp.2 indicate principal component analysis (PCA) was performed to reduce the dimensions of measured metal and metalloid concentrations, and the first two axes were used as proxies for these elements. Depth, Stream depth; EC_ us, Electrical conductivity; TN, Total nitrogen; Airtemp, Mean annual temperature; Precipsum, Annual precipitation; PrecSeascov, Precipitation seasonality conditions; TempRange, Annual temperature range.