Table 1 Locations of populations of  Rumex acetosa  and  Commelina communis  , and the total and extractable Cu concentrations in the substrates associated with plants sampled

M

30°52´N, 118°01´E

Fenghuangshan, Anhui (FHS)

> 500

13

> 1000

15

2787 ± 827 ^b**

359 ± 85 ^b

M

30°55´N, 117°53´E

Shizishan, Anhui (SZS)

100-500

  11

500-1000

15

7966 ± 1197 ^a

1778 ± 314 ^a

M

30°56´N, 118°09´E

Dagongshan, Anhui (DGS)

> 500

15

500-1000

  12

7033 ± 1819 ^a

1769 ± 610 ^a

M

30°26´N, 117°16´E

Tongshan, Anhui (CZ)

> 5000

15

> 5000

15

3941 ± 1228 ^b

594 ± 279 ^b

M

30°02´N, 115°01´E

Tonglvshan, Hubei (TLS)

n.a

n.a

> 1000

15

8587 ± 920 ^a

2194 ± 219 ^a

M

29°56´N, 114°53´E

Tongshankou, Hubei (TSK)

n.a.

n.a

< 500

13

4519 ± 988 ^b

679 ± 142 ^b

M

31°45´N, 118°33´E

Tongjing, Jiangsu (TJ)

< 100

11

n.a.

n.a

3895 ± 76 ^b

927 ± 17 ^b

M

32°06´N, 119°04´E

Anjishan, Jiangsu (AJS)

< 100

10

< 100

10

6572 ± 238 ^a

1832 ± 75 ^a

M

32°04´N, 119°05´E

Jiuhuashan, Jiangsu (JHS)

100-500

12

n.a.

n.a

3341 ± 100 ^b

633 ± 20 ^b

NM

30°56´N, 117°49´E

Tongling, Anhui (TLCK)

< 100

11

< 100

12

50 ± 0.3 ^c

5.1 ± 0.3 ^c

NM

31°12´N, 116°47´E

Shucheng, Anhui (SCCK)

100-500

  13

100-500

14

3.7 ± 0.4 ^c

2.0 ± 0.1 ^c

NM

30°28´N, 117°17´E

Chizhou, Anhui (CZCK)

100-500

  14

< 100

12

28 ± 18 ^c

6.4 ± 0.2 ^c

NM

30°57´N, 118°09´E

Nanling, Anhui (DGSCK)

< 100

11

100-500

15

28 ± 0.4 ^c

7.2 ± 0.3 ^c

NM

32°02´N, 118°55´E

Nanjing, Jiangsu (JSCK)

< 100

12

< 100

11

62 ± 28 ^c

11 ± 0.3 ^c

NM

30°15´N, 120°08´E

Hangzhou, Zhejiang (HZCK)

n.a.

n.a

100-500

12

23 ± 4.3 ^c

6.4 ± 0.1 ^c