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Hu X.,Ocean University of China | Su R.,Ocean University of China | Zhang F.,Ocean University of China | Zhang F.,Polar Research Institute of China | And 3 more authors.
Journal of Ocean University of China | Year: 2010

In vivo fluorescence methods are efficient tools for studying the distribution of phytoplankton in nature. Different algae species usually have different pigments with different ratios, which results in different fluorescence emission spectra. Based on multiple excitation wavelength fluorescence emission spectra, a discrimination technique is established in this study. The discrimination method, established by multivariate linear regression and weighted least-squares, was used to differentiate the samples cultured in the laboratory and collected from Jiaozhou Bay near Qingdao at the division level. The correctly discriminated samples were ≥ 86% for single algae samples, ≥ 88% for simulatively mixed ones, ≥ 91% for physically mixed ones and 100% for samples collected from Jiaozhou Bay. The result in this research is more definite for the physically mixed samples in the laboratory. The method described here can be employed to monitor the phytoplankton population in the marine environment. © 2010 Science Press, Ocean University of China and Springer Berlin Heidelberg. Source


Jiang R.,Zhejiang Ocean University | Wang J.-X.,Zhejiang Ocean University | Huang B.,Zhejiang Provincial Zhoushan Marine Ecological Environmental Monitoring Station | Yu K.-C.,Zhejiang Ocean University | And 3 more authors.
Marine Pollution Bulletin | Year: 2016

The aim of this study was to investigate the bacterial community composition, the concentration of organic contaminants, and their relationship in the sediments of Jiaojiang estuary. Sediments were collected from seven stations and the environmental parameters were analyzed. The results showed that the site closest to the chemical industry zone was the most polluted. Bacterial communities were determined using 16S rRNA clone libraries and phylogenetic analysis. These results revealed that there were 13 known bacterial phyla in the sediments and that Proteobacteria were the dominant group. Using these data, we assessed the correlation between bacterial communities and organic contaminants using cluster, multidimensional scaling, and redundancy analyses. These showed that there was no simple relationship between organic contaminants and bacterial community diversity in the sediments, but polycyclic aromatic hydrocarbons were more influential than the other pollutants and negatively affected Chloroflexi. © 2016 Elsevier Ltd. Source


Liu L.-S.,Chinese Research Academy of Environmental Sciences | Li Z.-C.,Chinese Research Academy of Environmental Sciences | Zhou J.,Chinese Research Academy of Environmental Sciences | Zheng B.-H.,Chinese Research Academy of Environmental Sciences | Tang J.-L.,Zhejiang Provincial Zhoushan Marine Ecological Environmental Monitoring Station
Huanjing Kexue/Environmental Science | Year: 2011

The events of red tide were collected in Yangtze River Estuary and adjacent waters from 1972 to 2009. Based on geographic information system (GIS) analysis on the temporal and spatial distribution of red tide, the distribution map was generated accordingly. The results show: (1) There are three red tide-prone areas, which are outside the Yangtze River estuary and the eastern of Sheshan, Huaniaoshan-Shengshan-Gouqi, Zhoushan and the eastern of Zhujiajian. The red tide occurred 174 times in total, in which there were 25 times covered the area was larger than 1000 km 2. After 2000, the frequency of red tide were significantly increasing; (2) The frequent occurrence of red tide was in May (51% of total occurrence) and June (20% of total occurrence); (3) In all of the red tide plankton, the dominant species were Prorocentrum danghaiense, Skeletonema costatum, Prorocentrum dantatum, Nactiluca scientillans. The red tides caused by these species were 38, 35, 15, 10 times separately. Source


Liu L.,Chinese Research Academy of Environmental Sciences | Zhou J.,Chinese Research Academy of Environmental Sciences | Zheng B.,Chinese Research Academy of Environmental Sciences | Cai W.,Chinese Research Academy of Environmental Sciences | And 3 more authors.
Marine Pollution Bulletin | Year: 2013

Between 1972 and 2009, evidence of red tide outbreaks in the Yangtze River Estuary and adjacent waters was collected. A geographic information system (GIS) was used to analyze the temporal and spatial distribution of these red tides, and it was subsequently used to map the distribution of these events. The results show that the following findings. (1) There were three red tide-prone areas: outside the Yangtze River Estuary and the eastern coast of Sheshan, the Huaniaoshan-Shengshan-Gouqi waters, and the Zhoushan areas and eastern coast of Zhujiajian. In these areas, red tides occurred 174 total times, 25 of which were larger than 1000 km2 in areal extent. After 2000, the frequency of red tide outbreaks increased significantly. (2) During the months of May and June, the red tide occurrence in these areas was 51% and 20%, respectively. (3) Outbreaks of the dominant red tide plankton species Prorocentrum dong-haiense, Skeletonema costatum, Prorocentrum dantatum, and Noctiluca scientillan occurred 38, 35, 15, and 10 times, respectively, during the study interval. © 2013 Elsevier Ltd. Source


Donghui L.,CAS Institute of Remote Sensing | Donghui L.,University of Chinese Academy of Sciences | Zhengqiang L.,CAS Institute of Remote Sensing | Kaitao L.,CAS Institute of Remote Sensing | And 7 more authors.
IOP Conference Series: Earth and Environmental Science | Year: 2014

Aerosol models are widely used in satellite remote sensing to derived aerosol mode from aerosol optical and microphysical properties. One year of ground-based aerosol remote sensing observations were carried out using sun-sky radiometer measurements in Zhoushan (122.1897E, 29.9944N), Zhejiang Province, Eastern China. At the same time column Aerosol Optical Depth (AOD), Ångström exponent (AE), Single Scattering Albedo (SSA), asymmetry factor (g), complex refractive index and column aerosol volume spectral distribution were retrieved by mature code as well as some procedures, such as radiometer calibration, cloud screening and data selection strategies. Aerosol size parameters were separated as fine effective radius (rvf) and coarse effective radius (rvc) due to the column aerosol size distribution is generally bimodal lognormal distribution. The relationship between these parameters and effective radius was shown and analyzed. It is shown that aerosol in Zhoushan is urban-industrial type dominate, mixed with marine aerosol and mineral dust aerosol. As a result, this study showed a part of aerosol comes from mainland industrial areas by using the backward trajectory model. Source

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