Table 3 Spearman’s correlation between abiotic environment factors and biodiversity of N-DAMO bacteria (16S rRNA and pmoA genes) in Miyun Reservoir

Temperature

− 0.72^b

− 0.56

− 0.44

0.44

—

—

—

—

WD

0.61^a

0.32

− 0.73^a

0.23

0.13

0.13

0.04

0.04

pH

0.42

− 0.14

0.26

− 0.33

− 0.47

− 0.86^b

− 0.31

− 0.90^b

DO

− 0.15

0.29

0.64^a

− 0.25

− 0.29

− 0.50

− 0.69^a

− 0.63^a

Salinity

0.40

− 0.06

0.46

− 0.44

− 0.88^b

− 0.58

− 0.87^b

− 0.55

IW-NO₂⁻-N

− 0.96^b

− 0.15

− 0.92^b

0.16

0.85^a

0.04

0.66^a

0.51

IW-NO₃⁻-N

0.94^b

− 0.14

0.96^b

− 0.31

− 0.83^a

0.22

− 0.67^a

− 0.49

IW-NO₄⁺-N

− 0.32

− 0.10

− 0.58

0.26

0.44

− 0.32

0.80^a

− 0.52

IW-TP

− 0.11

0.08

0.23

− 0.30

− 0.21

− 0.05

− 0.19

0.33

BS-NO₂⁻-N

− 0.61

− 0.14

0.62^a

− 0.25

0.84^b

0.63^a

0.83^b

0.62^a

BS-NO₃⁻-N

− 0.52

− 0.91^b

0.55

− 0.91^b

− 0.67^a

− 0.44

− 0.76^a

− 0.43

BS-NO₄⁺-N

0.272

0.34

− 0.82^a

0.14

0.66^b

0.70^a

0.50

0.68^a

BS-TP

0.09

− 0.44

0.26

− 0.44

− 0.156

0.06

− 0.19

0.02

BS-TN

0.321

− 0.14

0.24

− 0.19

0.48

0.01

0.31

0.19

BS-TOC

− 0.05

0.21

0.74^a

0.25

0.86^b

0.38

0.74^a

0.45

BS-C/N

0.22

− 0.69

0.28

− 0.31

− 0.37

− 0.51

− 0.29

− 0.47