长江科学院院报
長江科學院院報
장강과학원원보
JOURNAL OF YANGTZE RIVER SCIENTIFIC RESEARCH INSTITUTE
2015年
6期
94-99
,共6页
浮游藻类%空间特征%长江中下游%群落结构%细胞丰度%多样性指数
浮遊藻類%空間特徵%長江中下遊%群落結構%細胞豐度%多樣性指數
부유조류%공간특정%장강중하유%군락결구%세포봉도%다양성지수
phytoplankton%spatial characteristics%middle-low reach of the Yangtze River%community structure%cell abundance%diversity index
为更全面了解长江中下游干流浮游藻类资源现状，于2014年夏季对长江中下游武汉—河口江段的浮游藻类空间分布特征进行调查，共设置了19个调查断面。本次调查共检出浮游藻类6门66种，其中硅藻24种，绿藻23种，优势种属共检出3门6种；浮游藻类平均细胞丰度为（13．43±5．34）×104 cell／L，其中武汉上游最高，为23．18×104 cell／L，上海河口最低，为5．19×104 cell／L；浮游藻类多样性指数均值为3．37±0．35，其中南京下游最高，为4．1，上海上游最低，为2．7；调查样点根据浮游藻类细胞丰度大致可聚为3类：芜湖—南通段、武汉下游—大通段、武汉上游和上海上游。调查结果表明，长江中下游干流浮游藻类数量与空间分布可能受到水文条件的影响，而非受到营养盐的限制。
為更全麵瞭解長江中下遊榦流浮遊藻類資源現狀，于2014年夏季對長江中下遊武漢—河口江段的浮遊藻類空間分佈特徵進行調查，共設置瞭19箇調查斷麵。本次調查共檢齣浮遊藻類6門66種，其中硅藻24種，綠藻23種，優勢種屬共檢齣3門6種；浮遊藻類平均細胞豐度為（13．43±5．34）×104 cell／L，其中武漢上遊最高，為23．18×104 cell／L，上海河口最低，為5．19×104 cell／L；浮遊藻類多樣性指數均值為3．37±0．35，其中南京下遊最高，為4．1，上海上遊最低，為2．7；調查樣點根據浮遊藻類細胞豐度大緻可聚為3類：蕪湖—南通段、武漢下遊—大通段、武漢上遊和上海上遊。調查結果錶明，長江中下遊榦流浮遊藻類數量與空間分佈可能受到水文條件的影響，而非受到營養鹽的限製。
위경전면료해장강중하유간류부유조류자원현상，우2014년하계대장강중하유무한—하구강단적부유조류공간분포특정진행조사，공설치료19개조사단면。본차조사공검출부유조류6문66충，기중규조24충，록조23충，우세충속공검출3문6충；부유조류평균세포봉도위（13．43±5．34）×104 cell／L，기중무한상유최고，위23．18×104 cell／L，상해하구최저，위5．19×104 cell／L；부유조류다양성지수균치위3．37±0．35，기중남경하유최고，위4．1，상해상유최저，위2．7；조사양점근거부유조류세포봉도대치가취위3류：무호—남통단、무한하유—대통단、무한상유화상해상유。조사결과표명，장강중하유간류부유조류수량여공간분포가능수도수문조건적영향，이비수도영양염적한제。
To know better the current situation of phytoplankton resources in middle-low reaches of the mainstream Yangtze River,we investigated the spatial distribution characteristics of phytoplankton in Wuhan-Estuary reach of the Yangtze River in the summer of 2014.Samples were collected from 19 sections.Investigation results show that there were 6 classes of phytoplankton detected,including 66 species been recorded,among which species of Bacil-lariophyta and Chlorophyta were recorded 24 and 23 ,respectively.Predominant species were recorded 3 classes,6 species.The average phytoplankton cell abundance in Wuhan-estuary reach was (13.43 ±5.34)×104 cell/L, with the maximum (23.18 ×104 cell/L)recorded in upstream Wuhan and the minimum (5.19 ×104 cell/L)re-corded in the estuary at Shanghai.The average of Shannon’s diversity index was 3.37 ±0.35,the maximum was 4.1 recorded in downstream Nanjing and minimum 2.7 recorded in upstream Shanghai.Results of similarity cluste-ring indicated that the phytoplankton communities at Wuhu-Nantong reach were similar,downstream Wuhan-Datong reach were similar and the phytoplankton community at upstream Wuhan was similar to that at upstream Shanghai. The study results suggest that the quantity and spatial distribution of phytoplankton in Wuhan-estuary reach of Yan-gtze River are probably affected by the hydrological conditions rather than the nutrition.
