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IN SITU DAILY GROWTH RATE OF PROCHLOROCOCCUS AT THE CHLOROPHYLL MAXIMUM LAYER IN THE SOUTHERN SOUTH CHINA SEA:AN ESTIMATION FROM CELL CYCLE ANALYSIS 被引量:1
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作者 杨燕辉 焦念志 《Chinese Journal of Oceanology and Limnology》 SCIE CAS CSCD 2002年第S1期8-14,共7页
Prochlorococcus is the dominant population of the autotrophs in the oceanic area in theSouth China Sea; and contributes significantly to picoplanktonic (【2μm) carbon biomass. However, thereis no availabe data on its... Prochlorococcus is the dominant population of the autotrophs in the oceanic area in theSouth China Sea; and contributes significantly to picoplanktonic (【2μm) carbon biomass. However, thereis no availabe data on its growth the and productivity so far. In the present study, the in situ populationgrowth rate of Prochlorococus at the chlorophyll maximum layer at 6 .3°N, 110°E in the South China 展开更多
关键词 cell cycle PROCHLOROCOCCUS growth rate the SOUTH China SEA
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EFFECTS OF IRON ON PICOPLANKTON IN THE SOUTH CHINA SEA AS REVEALED BY SIMULATED IN SITU INCUBATION EXPERIMENT 被引量:1
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作者 杨燕辉 焦念志 《Chinese Journal of Oceanology and Limnology》 SCIE CAS CSCD 2002年第S1期66-73,共8页
Iron (FeCl<sub>3</sub>) enrichment experiment was carried out at 6. 3°N, 110°E in the SouthChina Sea. Cell abundances of the main groups of picoplankton Synechococcus, Prochlorococcus, picoeu-k... Iron (FeCl<sub>3</sub>) enrichment experiment was carried out at 6. 3°N, 110°E in the SouthChina Sea. Cell abundances of the main groups of picoplankton Synechococcus, Prochlorococcus, picoeu-karyote and heterotrophic bacteria were traced during the experiment by flow cytometry (FCM). Resultsshowed that picoplankton responded rapidly to iron of nano mole concentration. However, high concentra- 展开更多
关键词 IRON ENRICHMENT PICOPLANKTON South China Sea
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MEMBRANE POTENTIAL——A KEY PARAMETER OF AQUATIC MICROPLANKTON
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作者 杨印杰 焦念志 《Chinese Journal of Oceanology and Limnology》 SCIE CAS CSCD 2002年第S1期74-80,共7页
Membrane potential is essential for the uptake of substance and physiological activityin cells; and is an indicator of cell viability and a criterion of aquatic environment. It is also applied toclassification of ecol... Membrane potential is essential for the uptake of substance and physiological activityin cells; and is an indicator of cell viability and a criterion of aquatic environment. It is also applied toclassification of ecological populations. So membrane potential is a key parameter in studies on aquaticmicroplankton. It can be estimated by microelectrode, radioisotope method, spectro photomeny, flow cy- 展开更多
关键词 MEMBRANE POTENTIAL AQUATIC MICROPLANKTON FLOW CYTOMETRY
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DISTRIBUTION OF VIRIOPLANKTON IN THE KUROSHIO CURRENT AND THE ADJACENT AREA IN THE EAST CHINA SEA AS DETERMINED BY FLOW CYTOMETRY
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作者 杨燕辉 焦念志 《Chinese Journal of Oceanology and Limnology》 SCIE CAS CSCD 2002年第S1期1-7,共7页
Distribution of one group of marine viral particles along the Kuroshio Current and theadjacent area was investigated in June, 1998 using flow cytometry for the first time. The position of thisgroup of virioplankton in... Distribution of one group of marine viral particles along the Kuroshio Current and theadjacent area was investigated in June, 1998 using flow cytometry for the first time. The position of thisgroup of virioplankton in flow cytometry plots coincided with the position of the V-I group reported byMarie et al. (1999). Abundances of this group of virioplankton in the surface water ranged from 3.4×10<sup>5</sup> to 2. 3×10<sup>6</sup> ml<sup>-1</sup> in the investigated area. High abundance occurred in the shelf water and low abun- 展开更多
关键词 VIRIOPLANKTON FLOW CYTOMETRY EAST China SEA
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Investigating missing sources of glyoxal over China using a regional air quality model (RAMS-CMAQ) 被引量:1
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作者 Jialin Li Meigen Zhang +5 位作者 Guiqian Tang Fangkun Wu Leonardo M.A. Alvarado Mihalis Vrekoussis Andreas Richter John P. Burrows 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2018年第9期108-118,共11页
Currently, modeling studies tend to significantly underestimate observed space-based glyoxal (CHOCHO) vertical column densities (VCDs), implying the existence of missing sources of giyoxal. Several recent studies ... Currently, modeling studies tend to significantly underestimate observed space-based glyoxal (CHOCHO) vertical column densities (VCDs), implying the existence of missing sources of giyoxal. Several recent studies suggest that the emissions of aromatic compounds and molar yields of glyoxal in the chemical mechanisms may both be underestimated, which can affect the simulated glyoxal concentrations. In this study, the influences of these two factors on glyoxal amounts over China were investigated using the RAMS-CMAQ modeling system for January and July 2014. Four sensitivity simulations were performed, and the results were compared to satellite observations. These results demonstrated significant impacts on glyoxal concentrations from these two factors. In case 1, where the emissions of aromatic compounds were increased three-fold, improvements to glyoxal VCDs were seen in high anthropogenic emissions regions. In case 2, where molar yields of glyoxal from isoprene were increased five-fold, the resulted concentrations in July were B-B-fold higher, achieving closer agreement between the modeled and measured glyoxal VCDs. The combined changes from both cases 1 and 2 were applied in case B, and the model succeeded in further reducing the underestimations of glyoxal VCDs. However, the results over most of the regions with pronounced anthropogenic emissions were still underestimated. So the molar yields of giyoxal from anthropogenic precursors were considered in case 4. With these additional mole yield changes (a two-fold increase), the improved concentrations agreed better with the measurements in regions of the lower reaches of the Yangtze River and Yellow River in January but not in July. 展开更多
关键词 GLYOXAL Volatile organic compounds Molar yields RAMS-CMAQ China
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