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引用本文:刘林峰,周先华,高健,刘梅群,潘晓斌,贺磊,蔡世耀,赵以军,潘超,王卉君,张佳敏,叶有旺,刘伟.神农架大九湖湿地浮游植物群落结构特征及营养状态评价.湖泊科学,2018,30(2):417-430. DOI:10.18307/2018.0213
LIU Linfeng,ZHOU Xianhua,GAO Jian,LIU Meiqun,PAN Xiaobin,HE Lei,CAI Shiyao,ZHAO Yijun,PAN Chao,WANG Huijun,ZHANG Jiamin,YE Youwang,LIU Wei.Phytoplankton community structure and trophic status evaluation in Dajiuhu wetland of Shennongjia Alpine. J. Lake Sci.2018,30(2):417-430. DOI:10.18307/2018.0213
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神农架大九湖湿地浮游植物群落结构特征及营养状态评价
刘林峰1, 周先华2, 高健1, 刘梅群2, 潘晓斌2, 贺磊2, 蔡世耀2, 赵以军1, 潘超1, 王卉君1, 张佳敏1, 叶有旺1, 刘伟1
1.湖北工业大学河湖生态修复与藻类利用湖北省重点实验室, 土木建筑与环境学院, 武汉 430068;2.湖北十堰市水文水资源勘测局, 十堰 442000
摘要:
大九湖湿地是南水北调中线工程的重要水源涵养地之一.为了解实施生态修复工程后浮游植物群落结构特征及水质营养状态,于2014年11月2015年9月进行了3次采样调查,综合营养状态指数表明水质处于中营养和轻度富营养化之间,水质富营化水平沿水流方向呈降低趋势;共采集浮游植物8门129种,11月优势种为绿藻门的四尾栅藻(Scenedesmus quadricauda)和硅藻门的颗粒直链藻(Melosira granulata)、短缝藻(Eunotia sp.);5月优势种为蓝藻门的纤细席藻(Phormidium tenue)、绿藻门的四尾栅藻(Scenedesmus quadricauda)和球衣藻(Chlamydomonas globosa Snow)、硅藻门的短线脆杆藻(Fragilaria brevistriata);9月优势种为蓝藻门的拟柱孢藻(Cylindrospermopsis raciborskii)、小形色球藻(Chroococcus minor)和泽丝藻(Limnothrix redekei),优势种主要为中污带指示种.冗余分析表明总磷和总氮浓度对浮游植物丰度变化有显著影响,温度和总磷浓度对浮游植物生物量有显著影响,蓝藻门和绿藻门的丰度和生物量均与总磷浓度呈正相关.
关键词:  神农架  大九湖湿地  浮游植物  群落结构  营养状态
DOI:10.18307/2018.0213
分类号:
基金项目:国家自然科学基金项目(31500378)、湖北省水利重点科研项目(HBSLKY201719)、湖北省科技支撑计划项目(2015BCH329)、湖北工业大学高层次人才科研启动金(337301)和河湖生态修复与藻类利用湖北省重点实验室开放基金项目(HHKF201506)联合资助.
Phytoplankton community structure and trophic status evaluation in Dajiuhu wetland of Shennongjia Alpine
LIU Linfeng1, ZHOU Xianhua2, GAO Jian1, LIU Meiqun2, PAN Xiaobin2, HE Lei2, CAI Shiyao2, ZHAO Yijun1, PAN Chao1, WANG Huijun1, ZHANG Jiamin1, YE Youwang1, LIU Wei1
1.Key Laboratory of Ecological Remediation of Lakes and Rivers and Algal Utilization of Hubei Province, School of Civil and Environment, Hubei University of Technology, Wuhan 430068, P. R. China;2.Hydrology and Water Resources Survey Bureau of Shiyan, Shiyan 442000, P. R. China
Abstract:
Dajiuhu wetland is a rare subtropical alpine in the central China. Dajiuhu wetland is the source of the Du River, a first-grade tributary of the Han River, and the wetland also serves as one of the important water conservation area of the middle routes of South-to-North Water Diversion Project. The human activities such as ditches digging, holes dredging and bog draining have led to severe degradation of ecological function and the shrinking of lake surface area in Dajiuhu wetland since 1986. After the implementation of 'the Dajiuhu wetland protection and ecological restoration project' from 2005 until present, we conducted a field survey on the phytoplankton community and lake trophic status from November 2014 to September 2015 to reveal the status quo post the restoration project. Trophic status indices showed the water quality was between mesotrophy and light eutrophication. The water eutrophication level decreased along the water flow direction. A total of 129 phytoplankton species belonging 8 phyla were observed. Scenedesmus quadricauda, Melosira granulate and Eunotia sp. were the common dominant species in November 2014, and Phormidium tenue, Chlamydomonas globosa Snow, Scenedesmus quadricauda and Fragilaria brevistriata in May 2015; Limnothrix redekei, Cylindrospermopsis raciborskii, and Chroococcus minor in September 2015. All the dominant species were α or β-mesosaprobity species. Redundancy analyses indicated that total phosphorus and total nitrogen were the key drivers behind this difference of the phytoplankton abundance, while water temperature and total phosphorus showed significant effects on phytoplankton biomass. Redundancy analyses further showed a positive relationship between total phosphorus and the abundance (and biomass) of Cyanophyta or Chlorophya.
Key words:  Shennongjia Alpine  Dajiuhu wetland  phytoplankton  community structure  trophic status
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