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| Plant diversity under different site conditions of rare earth mine in northeastern Guangdong |
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| DOI：10.16768/j.issn.1004-874X.2016.10.015 |
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| Abstract: |
| Abstract：The research investigated the plant diversity and its relationship with environmental factors at
different topographies sites after 5 years of phytoremediation，in the rare earth mine in Xiache town，Heping County，
Guangdong Province. The results were as follows:（1）Succession of the plants used in phytoremediation into wild
plants was found，and the artificial plant vegetation was finally replaced by the local wild plants，most of which were
local perennial herbaceous plants.（2）Main plant community plants，Pteridium aquilinum and Dicranopteris pedata
expressed the strong adaptability，the important value of P. aquilinum at the south slope plot was up to 0.83.（3）
Plant diversity at different plots appeared the tendency of bottom slope ＞ top slope ＞ mid slope，and shady slope
＞ sunny slope. The bottom slope with flat topography and sunlight was suitable for plant growth.（4）Between Pielou
evenness index and Simpson index，there was significant correlation，Pielou evenness index and Simpson index of
south slope plot and slope plot were high than those of the other plots.（5）Characteristic of plant diversity between
the south slope plot and the north slope plot were similar，and similarity of plant community reached 0.60. Relevant analysis indicated that areas with similar environment had high plant similarity，suggesting that topographic factors
had great influences on plant restoration in rare earth mine，and moisture and temperature were the crucial factors for
the plants’ fast restoration. |
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