Abstract:From August to October in 2010, approximately 70 hectares of water hyacinth were planted at the Baishan Bay in Lake Dianchi and benthic macro-invertebrates were sampled. The densities of benthic macro-invertebrates in water hyacinth area (WHA), near water hyacinth area (NWHA) and far water hyacinth area (FWHA) were 294.5,159 and 261 ind/m2, respectively. Amongst of all present species, oligochaete Limnodrilus hoffmeisteri was the dominant species, representing 68.3% (WHA), 59.6% (NWHA) and 86.0% (FWHA). Stepwise regression analysis showed a significantly positive relationship (P < 0.01) between the densities of Limnodrilus hoffmeisteri to the total phosphorus (TP) in the water and Labile-P in the sediment. Limnodrilus hoffmeisteri was a good indicator of eutrophication. The richness and biodiversity in WHA were higher (P < 0.05) than that in the NWHA and FWHA. The richness of benthic macro-invertebrates was 14 in WHA, 10 in NWHA and 6 in FWHA, respectively. Shannon-Wiener diversity indexes in WHA, NWHA and FWHA were 1.10, 0.57 and 0.54, respectively. After planting water hyacinth in the lake, in WHA and NWHA, the Margalef index, Shannon-Wiener index, Simpson index and Peilou index in October 2010 were significantly increased comparing to August and September 2010 (P < 0.05). However, these indexes were not significantly different at FWHA during the research intervals. A controlled presence of water hyacinth is not harmful to benthic invertebrates in a eutrophic lake.
王, 智, 张志勇, 张君倩, 张迎颖, 严少华. 水葫芦修复富营养化湖泊水体区域内外底栖动物群落特征[J]. 中国环境科学, 2012, 32(1): 142-149.
WANG , ZHI , ZHANG Zhi-Yong, ZHANG Jun-Qian, ZHANG Ying-Ying, YAN Shao-Hua. The fauna structure of benthic macro-invertebrates for environmental restoration in a eutrophic lake using water hyacinths. CHINA ENVIRONMENTAL SCIENCECE, 2012, 32(1): 142-149.