螺蛳(<i>Margarya melanioides</i>)生物扰动对海菜花湿地底质的影响

叶碧碧; 李国宏; 靳明; 储昭升

doi:10.3969/j.issn.1674-991X.2018.03.034

螺蛳(Margarya melanioides)生物扰动对海菜花湿地底质的影响

doi: 10.3969/j.issn.1674-991X.2018.03.034

叶碧碧¹,
李国宏^1,2,
靳明¹,
储昭升^1,*, ,

^1. 湖泊水污染治理与生态修复技术国家工程实验室,中国环境科学研究院,北京 100012
^2. 西安建筑科技大学环境与市政工程学院,陕西西安 710055

详细信息

作者简介:
叶碧碧(1987—),男,工程师,主要从事水体生态修复研究与设计, 441635009@qq.com

通讯作者:
储昭升 E-mail: chuzs@craes.org.cn

中图分类号: X524
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出版历程
- 收稿日期: 2017-10-23
- 刊出日期: 2018-05-20

Effects of Margarya melanioides bioturbation on sediment of Ottelia acuminate constructed wetlands

YE Bibi¹,
LI Guohong^1,2,
JIN Ming¹,
CHU Zhaosheng^{1,*
, ,}

^1. National Engineering Laboratory for Lake Pollution Control and Ecological Restoration, Chinese Research Academy of Environmental Science, Beijing 100012, China
^2. School of Environmental and Municipal Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, China;

More Information

Corresponding author: Zhaosheng CHU E-mail: chuzs@craes.org.cn

摘要

摘要: 为探讨螺蛳(Margarya melanioides)生物扰动对海菜花湿地底质的影响,通过湿地模拟装置,研究了水力停留时间(HRT)为7 d和42 d条件下投放螺蛳对海菜花湿地底质理化性质、营养盐浓度及微生物的影响。结果表明:螺蛳对湿地表层0~3 cm底质生物扰动明显。HRT为7 d和42 d的湿地投放螺蛳均显著降低湿地表层0~3 cm底质的pH,同时使湿地表层0~7 cm底质ORP显著增加。在HRT为7 d条件下,投放螺蛳组湿地表层0~1 cm底质中有机质浓度显著低于对照组,较对照组降低了8.7%。在HRT为7 d和42 d条件下投放螺蛳组湿地表层0~1 cm底质中TN和TP的浓度均显著低于对照组,其中TN浓度分别降低了11.0%和3.9%;TP浓度分别降低了5.8%和3.2%。投放螺蛳明显增加了湿地表层底质中微生物数量,HRT为7 d和42 d的湿地细菌数量较对照组分别增加了32倍和5倍;放线菌数量较对照组分别增加了7倍和1倍。海菜花湿地中投放螺蛳可以改变湿地表层底质的pH和ORP,增加其中微生物的数量,同时对湿地底质中营养盐的去除发挥一定的正效益;HRT的增加有利于提高湿地表层底质的ORP及降低TP浓度。
- 螺蛳 /
- 海菜花 /
- 湿地 /
- 底质 /
- 生物扰动
Abstract: The effect of Margarya melanioides (M. melanioides) bioturbation on the physical and chemical properties, nutrient content and microbes of the sediment of Ottelia acuminate constructed wetland was investigated through the simulation device of constructed wetland with two kinds of hydraulic retention time (HRT, 7 and 42 d). The results showed that M. melanioides bioturbation on the sediment was strengthen in the depth of 0-3 cm. M. melanioides significantly reduced the pH of the sediment in the depth 0-3 cm under both HRT 7 d and HRT 42 d situation, while increasing the oxidation-reduction potential (ORP) in the depth 0-7 cm significantly. Under HRT 7 d, the content of organic matter in the depth of 0-1 cm of sediment with M. melanioides-added group was significantly lower than that in the control group, which was 8.7% lower. Under HRT 7 d and HRT 42 d, the TN and TP content of the test group sediment in the depth 0-1 cm were both significantly lower than the control group, where TN decreased by 11.0%, 3.9%, TP decreased by 5.8%, 3.2%, respectively. The amount of bacteria of the test group under HRT of 7 d and 42 d was increased by 32 times and 5 times respectively compared with the control group, while the amount of actinomycetes was increased by 7 times and 1 times, respectively. The addition of M. melanioides to the Ottelia acuminate constructed wetland might change the pH and ORP in the surface of sediment, improve the quantity of microorganisms, and play a positive role in the degradation of nutrients in surface sediment. In addition, increased HRT is beneficial to increase the redox conditions of the Ottelia acuminate constructed wetland and decrease the TP content in the sediment.
- Margarya melanioides /
- Ottelia acuminate /
- constructed wetlands /
- sediment /
- bioturbation

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