摘要
为研究嘉陵江重庆出口段小环藻＂水华＂的发生规律,对2010—2013年连续对嘉陵江出口段水华小环藻数量进行监测及分析,分析表明,嘉陵江出口段水华优势藻为星肋小环藻,呈年周期性暴发。每年早春（1月下旬—3月上旬）发生水华,水华期间星肋小环藻占总藻密度的85%~94%。SPSS18.0软件分析各理化指标与小环藻的相关性可知,水温与星肋小环藻数量呈显著正相关（r=-0.450,p=0.004〈0.01）。总氮（TN）、总磷（TP）、流速（v）、光照强度等其他理化因子与小环藻水华相关性不显著,但r〉r偏说明其他理化因子的交互影响对小环藻水华有促进作用。因此,春季为小环藻的适宜生境,较低的观测水温（8.5~11.5℃）,缓慢的流速（0.01~0.29 m/s）,足够的光照时长（11.25 h）,合理的营养盐分配才有可能发生小环藻水华。
The quantity of cyclotella in the estuary area of Jialing River was continuously monitored and analyzed from 2010 to 2013,in order to study the occurrence rule of cyclotella bloom in the estuary area of Jialing River in chongqing. It is indicated that cyclotella asterocoststs are dominant species in the estuary area of Jialing River and show an annual periodic outbreak. Water bloom occurs in early spring every year（ from late January to early March）,and cyclotella asterocoststs occupy 85% ~ 94% of the total algae density during water bloom. Correlation between a variety of physical and chemical indicators and the quantity of cyclotella asterocoststs are analyzed by SPSS18. 0 software,and it is shown that there is a significant positive correlation between the water temperature and the quantity of cyclotella asterocoststs（ r =- 0. 450,p = 0. 004 〈0. 01）. Total nitrogen（ TN）,total phosphorus（ TP）,flow velocity（ v）,light intensity,and other physical and chemical factors have no significant correlation with cyclotella asterocoststs blooms,but according to r 〉 r,it is illustrated that the interaction of other physical and chemical factors has a promoting effect in cyclotella asterocoststs blooms. So,spring is a suitable growth environment of cyclotella asterocoststs. The lower surveyed water temperature（ 8. 5 ~ 11. 5 ℃）,slow flow rate（ 0. 01 ~ 0. 29 m / s）,enough light（ 11. 25 h） and a reasonable distribution of nutrients may promote cyclotella asterocoststs blooms.
作者
王敏
袁绍春
徐炜
张腾璨
WANG Min YUAN Shaochun XU Wei ZHANG Tengcan(Key Laboratory of Hydraulic and Waterway Engineering of the Ministry of Education, School of River ＆ Ocean, Chongqing Jiaotong University, Chongqing 400074, P. R. China Chengdu Municipal Engineering Design Institute, Chengdu 610015, Sichuan, P. R. China)
出处
《重庆交通大学学报（自然科学版）》
CAS
北大核心
2016年第6期86-90,94,共6页
Journal of Chongqing Jiaotong University(Natural Science)
基金
重庆市教委科学技术研究项目(KJ1500510
KJ1400326)
重庆交通大学国家内河航道整治工程技术研究中心暨水利水运工程教育部重点实验室开放基金项目(SLK2013B05
SLK2015B08)
关键词
环境工程
小环藻
富营养化
环境因子
相关分析
environment engineering
cyclotella
eutrophication
environmental factors
correlation analysis
