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引用本文:谢小萍,李亚春,杭鑫,黄珊.气温对太湖蓝藻复苏和休眠进程的影响.湖泊科学,2016,28(4):818-824. DOI:10.18307/2016.0415
XIE Xiaoping,LI Yachun,HANG Xin,HUANG Shan.The effect of air temperature on the process of cyanobacteria recruitment and dormancy in Lake Taihu. J. Lake Sci.2016,28(4):818-824. DOI:10.18307/2016.0415
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气温对太湖蓝藻复苏和休眠进程的影响
谢小萍, 李亚春, 杭鑫, 黄珊
江苏省气象服务中心, 南京 210008
摘要:
利用20052014年每日的卫星数据、气象站和浮标站观测资料研究复苏期和休眠期的平均气温、稳定通过界限温度初终日、周有效积温与太湖蓝藻休眠和复苏时间的关系,探讨气温是否是影响蓝藻休眠和复苏时间进程的关键因子. 分析结果显示:太湖蓝藻复苏早晚与春季(35月)气温密切相关,春季气温越高,蓝藻复苏时间越早;太湖蓝藻休眠时间与秋、冬季(11次年1月)气温密切相关,秋、冬季气温越高,蓝藻休眠时间越晚. 此外根据分析结果发现,太湖首次出现蓝藻水华的时间一般是气温稳定通过9℃初日之后的1个月左右,但上一周期的休眠与下一周期的复苏之间气温异常偏高会导致蓝藻水华首次出现时间早于稳定通过9℃初日;最后一次蓝藻水华出现时间与气温稳定通过4℃的终日相近;在复苏期,湖水中的叶绿素a浓度随周有效积温变化而变化,二者相关系数为0.9.
关键词:  气温  稳定通过界限温度  积温  复苏  休眠  蓝藻  太湖
DOI:10.18307/2016.0415
分类号:
基金项目:江苏省基础研究计划太湖专项(BK2007745)、江苏省科技支撑计划项目(BE2011840)、江苏省气象局重点项目(KZ201403)和江苏省青年气象科研基金项目(Q201413)联合资助.
The effect of air temperature on the process of cyanobacteria recruitment and dormancy in Lake Taihu
XIE Xiaoping, LI Yachun, HANG Xin, HUANG Shan
Jiangsu Meteorological Service Center, Nanjing 210008, P.R.China
Abstract:
To elucidate the effects of air temperature on the recruitment and dormancy processes of cyanobacterial blooms in Lake Taihu, the relationships between blooms events that retrieved by satellite images and the air temperature, the first date and last date for the daily temperature steadily passing through the threshold, as well as the weekly accumulated temperature are separately analyzed using the satellite data, meteorology data and buoy observation data during 2005-2014. The analysis results show that: there is a significant negative correlation between the mean air temperature in spring and the onset time of cyanobacterial bloom, and the correlation coefficient is -0.85; the oneset time of cyanobacterial bloom is a month or so later than the air temperature steadily staying above 9℃; there is a significant positive correlation between the mean air temperature from November to the next January and the dormancy time of cyanobacterial bloom, and the correlation coefficient is 0.85; the dormancy time of cyanobacterial bloom is close to the last date for the air temperature steadily staying above 4℃; the concentrations of chlorophyll increase with weekly effective cumulative temperature during cyanobacterial recruitment period, and the correlation coefficient is 0.9.
Key words:  Air temperature  air temperature stability passing through the threshold  accumulative temperature  cruitment  dormancy  cyanobacterial bloom  Lake Taihu
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