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应用生态学报 ›› 2009, Vol. 20 ›› Issue (11): 2716-2722.

• 研究报告 • 上一篇    下一篇

基于树叶凋落物分解速率的溪流生态系统健康评价——以广东横石水河为例

迟国梁1,2;赵颖3;王建武2;童晓立1**   

  1. 1华南农业大学资源环境学院, 广州 510642|2华南农业大学热带亚热带生态研究所, 广州 510642|3华南农业大学理学院, 广州 510642
  • 出版日期:2009-11-20 发布日期:2009-11-20

Stream ecosystem health assessment based on the measurement of leaf litter breakdown: A case study in Hengshishui River of Guangdong Province

CHI Guo-liang1,2|ZHAO Ying3|WANG Jian-wu2|TONG Xiao-li1   

  1. 1College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, China|2Institute of Tropical and Subtropical
     Ecology, South China Agricultural University, Guangzhou 510642, China|3College of Science, South China Agricultural University, Guangzhou 510642, China
  • Online:2009-11-20 Published:2009-11-20

摘要: 用Gessner等提出的树叶凋落物分解模式对横石水河的功能完整性和生态系统健康进行评价,对比了藜蒴和荷木2个树种的树叶凋落物在横石水河各污染样点和未受污染样点的分解速率.结果表明:藜蒴和荷木树叶凋落物在研究区污染样点的分解速率均显著低于清洁样点(P<0.05);根据Gessner模式,各污染样点的环境得分均为0,而各清洁样点的环境得分均为2,表明横石水河污染河段的健康状态已受到严重破坏.研究区生态系统健康的生物学评价与水质分析结果一致,表明树叶凋落物分解模式是一个合适的评价河流状态的指数.

关键词: 树叶凋落物分解速率, 生态系统健康, 评价, 横石水河, 化学计量模型, 体外发酵, 氢气, 瘤胃甲烷, 碳水化合物

Abstract: Based on the Gessner’s model of leaf litter breakdown, the functional integrity and ecosystem health of Hengshishui River in Guangdong Province were assessed, and the breakdown rates of Castanopsis fissa and Schima superba leaf litters at the sites unpolluted and polluted by acid mine drainage were compared. The leaf litters of the two tree species had a significantly lower breakdown rate at polluted than at unpolluted sites (P<0.05). According the Gessner’s model, all polluted sites had an ecosystem health score 0, while all unpolluted sites had a score 2, indicating that the health status of polluted river reaches were severely damaged. The biological assessment of stream ecosystem health was consistent with the results of water quality analysis, indicating that the leaf litter breakdown model was a suitable index of stream status.

Key words: leaf litter breakdown rate, ecosystem health, assessment, Hengshishui River, stoichiometric model, in vitro fermentation, hydrogen, ruminal methane, carbohydrate.