Pub Date : 1900-01-01DOI: 10.3788/CJL201239.0715003
Wang Xiu-lin
In order to develop an in situ algae fluorescence auto-analyzer,the discriminating technology for phytoplankton populations was established by in vivo chlorophyll fluorescence excitation spectra composed of 12 excitation wavelengths(400,430,450,460,470,480,490,510,525,550,570,and 590 nm) of the algae occurring frequently in the coastal waters of China and a multivariate linear regression model.The linear regression model was solved by non-negative least squares.Some samples were tested.For 79 single division algal samples,96% samples were accurately discriminated,with recovery efficiency above 68%,and the recovery efficiency of 85% samples was above 80%.For 17 mixed division algal samples,76% samples were accurately determinated,with recovery efficiency above 74%.
{"title":"Differentiation of phytoplankton populations by in vivo fluorescence","authors":"Wang Xiu-lin","doi":"10.3788/CJL201239.0715003","DOIUrl":"https://doi.org/10.3788/CJL201239.0715003","url":null,"abstract":"In order to develop an in situ algae fluorescence auto-analyzer,the discriminating technology for phytoplankton populations was established by in vivo chlorophyll fluorescence excitation spectra composed of 12 excitation wavelengths(400,430,450,460,470,480,490,510,525,550,570,and 590 nm) of the algae occurring frequently in the coastal waters of China and a multivariate linear regression model.The linear regression model was solved by non-negative least squares.Some samples were tested.For 79 single division algal samples,96% samples were accurately discriminated,with recovery efficiency above 68%,and the recovery efficiency of 85% samples was above 80%.For 17 mixed division algal samples,76% samples were accurately determinated,with recovery efficiency above 74%.","PeriodicalId":258987,"journal":{"name":"Journal of Tropical Oceanography","volume":"197 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115004370","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.11978/J.ISSN.1009-5470.2014.06.008
Yimeng Rong, Ke Zhixin, Song Xing-yu, Shen Pingping, Wang Sheng-fu, Fan Yan-zhi, Huang Liang-min, Tan Yehui, L. Gang
Results are presented about the changes in chlorophyll a density, carbon fixation and nutrient levels in the surfacewaters of three transects of the southern South China Sea （SCS）, northern Java Sea （JS） and eastern Indian Ocean （IO） duringApril 5-16 of 2011. The in situ Chl a concentration and carbon fixation showed decreasing trends from high to low latitudealong the three transects, while the photosynthetic rate of phytoplankton estimated from 14C incorporation displayed no simplevariation with latitude. Chl a concentration and carbon fixation in the IO water was lower than that in the JS water. Highersalinity and lower contents of dissolved inorganic nitrogen （DIN） and silicate （SiO3^2-） characterized the IO water as comparedto the SCS or JS water, and the PO4^3- content was lower in the IO water than in the SCS or JS water in most cases. Our resultsalso indicate the importance of DIN and SiO3^2- concentrations for the geographical changes in phytoplankton biomass andprimary productivity among the three regions.
{"title":"Comparisons of surface Chl a and primary productivity along three transects of the southern South China Sea, northern Java Sea and eastern Indian Ocean in April 2011*","authors":"Yimeng Rong, Ke Zhixin, Song Xing-yu, Shen Pingping, Wang Sheng-fu, Fan Yan-zhi, Huang Liang-min, Tan Yehui, L. Gang","doi":"10.11978/J.ISSN.1009-5470.2014.06.008","DOIUrl":"https://doi.org/10.11978/J.ISSN.1009-5470.2014.06.008","url":null,"abstract":"Results are presented about the changes in chlorophyll a density, carbon fixation and nutrient levels in the surfacewaters of three transects of the southern South China Sea （SCS）, northern Java Sea （JS） and eastern Indian Ocean （IO） duringApril 5-16 of 2011. The in situ Chl a concentration and carbon fixation showed decreasing trends from high to low latitudealong the three transects, while the photosynthetic rate of phytoplankton estimated from 14C incorporation displayed no simplevariation with latitude. Chl a concentration and carbon fixation in the IO water was lower than that in the JS water. Highersalinity and lower contents of dissolved inorganic nitrogen （DIN） and silicate （SiO3^2-） characterized the IO water as comparedto the SCS or JS water, and the PO4^3- content was lower in the IO water than in the SCS or JS water in most cases. Our resultsalso indicate the importance of DIN and SiO3^2- concentrations for the geographical changes in phytoplankton biomass andprimary productivity among the three regions.","PeriodicalId":258987,"journal":{"name":"Journal of Tropical Oceanography","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126385858","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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