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

李明家, 吴凯媛, 孟凡凡, 沈吉, 刘勇勤, 肖能文, 王建军

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

Mingjia Li, Kaiyuan Wu, Fanfan Meng, Ji Shen, Yongqin Liu, Nengwen Xiao, Jianjun Wang

表1 环境和气候因子与最终模型的偏回归系数(R2)解释的两个流域中细菌总beta多样性、周转和嵌套组分

Table 1 The variation of bacterial total beta diversity, turnover or nestedness components in Lancang and Nujiang catchments are explained by the environmental and climate factors and the partial regression coefficients (R2) of the final model is reported.

澜沧江流域 Lancang catchment 怒江流域 Nujiang catchment 总beta多样性 Total beta diversity 周转组分 Turnover 嵌套组分 Nestedness 总beta多样性 Total beta diversity 周转组分 Turnover 嵌套组分 Nestedness 环境因子 Local factors 海拔 Elevation 0.43*** 0.41*** 0.43*** 0.45*** PCA1轴 Comp.1 0.21* 0.25* PCA2轴 Comp.2 0.22* 0.26* 酸碱度 pH 0.17* 0.15* 水深 Stream depth 0.23** 0.23*** 水温 Water temperature 电导率 Electrical conductivity 0.17* 0.18* 0.24** 0.29*** 总氮 Total nitrogen 0.24** 0.28*** 生物膜 Biofilm 0.20* 0.17* 0.28** 0.22** 气候因子 Climate factors 年平均气温 Mean annual temperature 0.42*** 0.42*** 0.38*** 0.41*** 年降水量 Annual precipitation 0.39*** 0.37*** 0.19* -0.14* 降水季节 Precipitation seasonality conditions 0.34*** 0.39*** -0.11* 年温度范围 Annual temperature range 0.33* 0.34** 0.23** 0.3** -0.15**