气温对太湖蓝藻复苏和休眠进程的影响
- 海之魂
-
0 次阅读
-
0 次下载
-
2020-03-20 12:54:43
文档简介:
kSci.(湖泊科学),2016,28(4):818—824DOI10.18307/2016.0415@2016byJournalofLakeSciences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,南京210OO8)摘要:利用2o05—2014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(3—5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(11一次年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TheefectofairtemperatureontheprocessofcyanobacteriarecruitmentanddormancyjnLakeTaihuXIEXiaoping,LIYachun,HANGXin&HUANGShan(JiangsuMeteorologicalServiceCenter,Nanfing210008,P.R.China)Abstract:ToelucidatetheeffectsofairtemperatureontherecruitmentanddormancyprocessesofcyanobacterialbloomsinLakeTaihu,therelationshipsbetweenbloomseventsthatretrievedbysatelliteimagesandtheairtemperature,thefirstdateandlastdateforthedailytemperaturesteadilypassingthroughthethreshold,aswellastheweeklyaccumulatedtemperatureareseparatelyana—lyzedusingthesatellitedata,meteorologydataandbuoyobservationdataduring2005—2014.Theanalysisresultsshowthat:thereisasignificantnegativecorrelationbetweenthemeanairtemperatureinspringandtheonsettimeofcyanobacterialbloom,andthecorrelationcoeficientis—O85:theonesettimeofcyanobaeterialbloomisamonthorsolaterthantheairtemperaturesteadilysta—yingabove9℃:thereisasignificantpositivecorelationbetweenthemeanairtemperaturefromNovembertothenextJanuaryandthedormancytimeofcyanobacterialbloom,andthecorrelationcoeficientisO.85;thedormancytimeofcyanobacterialbloomisclosetothelastdatefortheairtemperaturesteadilystayingabove4℃:theconcentrationsofchlorophyllincreasewithweeklyefee—tirecumulativetemperatureduringcyanobacterialrecruitmentperiod,andthecorrelationcoeficientis0.9.Keywords:Airtemperature;airtemperaturestabilitypassingthroughthethreshold;accumulativetemperature;cruitment;dor-mancy;eyanobaeterialbloom;LakeTaihu蓝藻是淡水湖泊中比较常见的一种浮游植物种类,在适宜的气象条件和营养盐浓度下,就会暴发性地生长,形成蓝
评论
发表评论