Soil animal diversity in Saccharum arundinaceum root system under different soil habitats
For evaluation of reclamation potential of Saccharum arundinaceum Retz. grown under heavy metal contaminated soils, the field investigation was conducted in Shaoguan mine areas in June 2011 with four indicators including heavy metals concentrations in soil and in S. arundinaceum, soil animal community structure, and soil pH. The sampling plots were located at Xinwenwu Village (XwV) and Jianwu Village (JwV) (respectively corresponding to the currently in production of copper ore and lead-zinc mine near), Xiatang Village (XtV) (near to tungsten mine, shutdown 25 years ago), and Tongziping Village (TzV) (with no mine pollution in the vicinity). The results show that a) pH value of sampling plots was ranked as XwV (3.84) < XtV (5.74 to 6.07) < TzV (7.23) < JwV (7.24); b) Integrated Pollution Index (IPI) was ranked as 31.54 (JwV) > 25.01 to 27.01 (XtV) > 7.33 (XwV) > 1.12 (TzV); c) enrichment factor of S. arundinaceum was ranked as 6.16 for XwV > 4.71 for TzV > 0.77 to 2.50 for XtV > 0.29 for JwV; d) soil animal biodiversity index for these plots was ranked as TzV > XtV > JwV > XwV, which was based on Shannon-Wiener Diversity Indices (H) and Simpson Dominance Indices (C), and TzV > XwV > JwV > XtV which was based on Pielou Uniformity Indices (E); and e) Jaccard Similarity Index (JSI) was 71.43% for plots from XwV contaminated with copper iron mine and JwV contaminated with lead-zine waste mine, and 60% for plots from XtV adjacent to tungsten mine cut-off 25 years and TzV without mine pollution in the vicinity, respectively. And these two types of plots were with different degrees of contamination. So JSI of these two types of plots varied from 25% to 30%, to be moderate degree of non-similarity. These results indicate that there was difference in the community structure of soil fauna in the S. arundinaceum community grown at different soil habitats with different degree of contamination, and diversity index was decreasing with increasing degree of pollution. These factors were the dominant factor in the decline of soil animal diversity including ISI, strong soil acidic, and continued pollution of irrigation water. At the same time, the heavy metal enrichment capacity of S. arundinaceum had little effect on the soil animal community structure diversity.
Saccharum arundinaceum Retz.root systemheavy metal pollutioncommunity structure of soil animalssoil animal diversity
NETL
NSTL
万方数据
维普
