Rong Xiao1 Mingxiang Zhang1 Xinying Yao1 Ziwen Ma1 Feihai Yu1 Junhong Bai 2

electronic supplementary material

soils, sec 2 • global change, environ risk assess, sustainable land use • research article

Heavy metal distribution in different soil aggregate size classes from restored brackishmarsh, oil exploitation zone and tidal mud flat of the Yellow River Delta

Rong Xiao1 • Mingxiang Zhang1 • Xinying Yao1 • Ziwen Ma1 • Feihai Yu1 • Junhong Bai 2

Received: 11 June 2015 / Accepted: 22 September 2015

Responsible editor: Fabio Scarciglia

1School of Nature Conservation, Beijing Forestry University, Beijing 100083, China

2State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China

Rong Xiao and Mingxiang Zhang contributed equally to this work

Rong Xiao

Table S1 Pearson correlation coefficients of SOC content and heavy metal fraction concentrations in different soil aggregates (n=15)

Cd / Cr / Cu / Ni / Pb / Zn
> 2 mm / F1 / .216 / .a / .458 / .340 / .a / .280
F2 / -.602 / -.462 / -.140 / .026 / .042 / .214
F3 / -.583 / -.841* / -.499 / -.581 / -.028 / -.745*
F4 / .a / .873* / .534 / .261 / -.041 / .370
F5 / -.066 / -.353 / -.199 / -.155 / .107 / -.179
0.25-2 mm / F1 / .984** / .a / .801* / .723* / .a / .998**
F2 / -.802* / -.832* / -.741* / .893* / -.956* / .951*
F3 / -.326 / -.995** / -.995** / .863* / -.684 / .780*
F4 / .975** / .960** / .970** / .961* / .885* / .997**
F5 / -.834* / .951** / .997** / -.597 / .371 / -.746*
0.053-0.25 mm / F1 / .874** / .a / .849** / .040 / .a / .197
F2 / .949** / -.484 / -.003 / -.047 / .622 / .233
F3 / .509 / -.006 / .205 / .578 / .528 / .885**
F4 / -.065 / .879** / .811* / .886** / .485 / .094
F5 / .362 / .601 / .774* / .713* / .822* / .709*
< 0.053 mm / F1 / .375 / .a / .133 / -.062 / .a / .668
F2 / -.254 / -.360 / -.566 / -.261 / -.064 / .269
F3 / -.142 / -.016 / -.023 / .038 / .232 / .497
F4 / .a / -.114 / -.080 / -.166 / .391 / -.028
F5 / -.240 / -.539 / .641 / .484 / .024 / .486

a. Cannot be computed because the related metal concentration is too low

*. Correlation is significant at the 0.05 level (2-tailed)

**. Correlation is significant at the 0.01 level (2-tailed)