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Table 4 Contributions of different factors to the variation in the community structure of AOA and AOB as revealed by canonical correspondence analysis or redundancy analyses

From: The effects of climate, catchment land use and local factors on the abundance and community structure of sediment ammonia-oxidizing microorganisms in Yangtze lakes

Variables AOA AOB
Variance explained (%) P value Variance explained (%) P value
Climate
 MAT (°C) 5.53 0.01 2.00 0.30
 MAP (mm) 7.68 0.00 1.00 0.36
Catchment land use
 Agriculture (%) 2.00 0.50 22.00 0.00
 Built-up land (%) 4.76 0.02 2.00 0.23
 Vegetation (%) 3.68 0.15 0.00 0.63
 Water bodies (%) 0.00 0.55 3.00 0.09
Water quality
 pH 3.38 0.13 1.00 0.54
 Depth (m) 3.38 0.13 2.00 0.11
 DO (mg L‒1) 3.53 0.13 3.00 0.11
 TOC (mg L‒1) 2.15 0.51 1.00 0.36
 NH4 + (mg L‒1) 7.06 0.00 1.00 0.31
 NO3 (mg L‒1) 4.14 0.06 3.00 0.06
 TP (mg L‒1) 3.22 0.24 12.00 0.01
 Chl-a (mg m−3) 3.07 0.20 22.00 0.00
Sediment properties
 Moisture (%) 3.07 0.16 2.00 0.37
 Density (g cm−3) 1.84 0.55 1.00 0.19
 STC (mg g−1) 2.92 0.24 1.00 0.38
 STN (mg g−1) 2.30 0.38 2.00 0.15
 C/N 7.06 0.00 0.00 0.58
Vegetation characteristics
 Richness 2.46 0.40 1.00 0.44
 Biomass (g m‒2) 1.23 0.78 1.00 0.35
 PTN (mg g−1) 3.99 0.04 1.00 0.41
 PTP (mg g−1) 2.76 0.24 0.00 0.63
All variables 81.21   84.30  
  1. Significance was determined by 499 permutations