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cje ›› 2005, Vol. ›› Issue (2): 206-208.

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Evaluation of ecological function value of mangrove soil on absorbing heavy metals-a case study of Dongzhaigang mangrove

XIN Kun1,2, ZHAO Guangru1,2, SUN Juan1, LIU Qiang2   

  1. 1. School of Life Sciences, Zhongshan University, Guangzhou 570215, China;
    2. Hainan Normal College, Haikou 571158, China
  • Received:2004-03-31 Revised:2004-07-04 Online:2005-02-10

Abstract: Based on samples collected from Dongzhaigang mangrove ecosystem of Hainan,the concentrations of Cu,Pb,Zn and Cd in soil were investigated and compared.The results showed that the concentrations of four metals were 5.04,10.36,20.06 and 0.06 μg·g-1 respectively in the 20 cm range of surface.Employing the replacing and shadow engineering methods,the function value of mangrove soil on absorbing heavy metals was evaluated,which indicated that the value of the natural mangrove soil to absorb heavy metals in Dongzhaigang mangrove ecosystem (about 2 065 hm2) was about 54.62 million yuan.

Key words: Shadow width, Relative light illuminance, Leaf area density function, Light wakening coefficient

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