洱海微囊藻昼夜垂直迁移研究
Study on diel vertical migration of Microcystis in Lake Erhai,Yunnan
查看参考文献27篇
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文摘
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为了给洱海藻华预警和微囊藻生态研究提供基础数据,于2009年11月至2010年9月每2个月在洱海定点进行微囊藻昼夜垂直迁移特征观测.结果表明,采样期间微囊藻密度最高值出现在11月,达$\left({1.10 \pm 0.52} \right) \times {10^7}{{\rm{L}}^{ - 1}}$;最低值出现在3月,为$\left({2.06 \pm 1.05} \right) \times {10^5}{{\rm{L}}^{ - 1}}$.水华爆发(高密度)期,所有月份微囊藻群体都表现出明显的昼夜迁移行为.受光照的影响,微囊藻群体白天分布在水体中下层,夜晚和凌晨迁移至上层水区.其中7月群体细胞分布与温度呈弱相关关系$\left({{r^2} = 0.367} \right)$,7月和9月微囊藻与pH呈极显著相关关系$\left({P < 0.001} \right)$,相关系数分别为0.823和0.712.低密度期(除了5月)微囊藻也表现出了明显的昼夜迁移现象,其中1月的迁移模式和水华(高密度)期相似,3月可能是由于Daphnia的捕食,微囊藻表现出了与其他月份相反的聚集模式. |
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其他语种文摘
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To support the basic data for forecast of algal blooms and ecological research of Microcystis,circadian vertical migration experiment was carried out at a fixing station bimonthly in Lake Erhai from November 2009 to September 2010.The results were as follows: The highest density $\left({1.10 \pm 0.52} \right) \times {10^7}\;{\rm{ind}}/{\rm{L}}$ of Microcystis was found in November 2009 and the lowest value $\left({2.06 \pm 1.05} \right) \times {10^5}\;{\rm{ind}}/{\rm{L}}$ occurred in March 2010.During water blooms (high density) period,Microcystis colonies in all months exhibited strong diel vertical migration (DVM) behavior.Due to the influence of light illumination,Microcystis stayed in deeper strata during the daytime and migrated into the epilimnion at night and before dawn.The distribution of Microcystis was weakly related to temperature in July $\left({{r^2} = 0.367} \right)$.Microcystis colonies had significant correlation with pH in July and September $\left({P < 0.001} \right)$,and the correlation coefficients were 0.823 and 0.712 respectively.Microcystis also showed strong diel vertical migration in low density (except for May 2010),among which, the migration pattern in January was similar with that in water blooms (high density).The aggregation pattern of Microcystis was found in March which may be associated with predation of Daphnia. |
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来源
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云南大学学报. 自然科学版
,2018,40(2):363-371 【核心库】
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DOI
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10.7540/j.ynu.20170664
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关键词
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微囊藻
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昼夜垂直迁移
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光照
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洱海
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地址
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浙江省海洋水产研究所, 农业部重点渔场渔业资源科学观测实验站;;浙江省海洋渔业资源可持续利用技术研究重点实验室, 浙江, 舟山, 316021
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浙江海洋大学水产学院, 浙江, 舟山, 316022
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中国科学院水生生物研究所东湖台站, 湖北, 武汉, 430072
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中国环境科学研究院湖泊生态环境创新基地, 国家环境保护湖泊污染控制重点实验室, 北京, 100012
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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0258-7971 |
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学科
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动物学 |
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基金
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国家水体污染控制与治理科技重大专项
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浙江省渔业资源增殖放流项目
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文献收藏号
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CSCD:6205084
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