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Gu Y.-G.,CAS South China Sea Fisheries Research Institute | Ke C.-L.,Guangdong Provincial Key Laboratory of Fishery Ecology and Environment | Liu Q.,Key Laboratory of South China Sea Fishery Resources Exploitation and Utilization | Lin Q.,Key Laboratory of South China Sea Fishery Resources Exploitation and Utilization
Marine Pollution Bulletin | Year: 2016

We investigated distribution, sources, and potential risks of polycyclic aromatic hydrocarbons (PAHs) in the surface sediments from the largest mariculture base in the eastern part of the province of Guangdong in southern China. Total concentrations of ∑. PAHs were 29.38-815.46. ng/g (dry weight), with a mean of 421.48. ng/g. The composition of PAHs was characterized by an abundance of low molecular weight PAHs (2-3 benzenoid ring), and Phenanthrene (PHE), Anthracene (AN) and Fluoranthene (FA) were the predominant constituents. PAHs in this area appear to have mainly originated from petroleum sources and the combustion of grass, wood, and coal. PAHs in surface sediments of Zhelin Bay had a 9% incidence of causing adverse biological effects on aquatic organisms, according to the mean effects range-median quotient. © 2016 Elsevier Ltd. Source


Gu Y.-G.,CAS South China Sea Fisheries Research Institute | Gu Y.-G.,Guangdong Provincial Key Laboratory of Fishery Ecology and Environment | Gu Y.-G.,Key Laboratory of South China Sea Fishery Resources Development and Utilization | Huang H.-H.,CAS South China Sea Fisheries Research Institute | And 5 more authors.
Environmental Toxicology and Pharmacology | Year: 2016

Heavy metal concentrations in edible organisms from the core area of Daya Bay's Fishery Resource Reserve, South China Sea, were determined. Samples of 14 crustacean, fish, and shellfish species were collected and analyzed. The As, Cd, Cr, Cu, Hg, Ni, Pb, and Zn concentrations were 0.18-1.16, 0.002-0.919, 0.40-2.85, 0.07-4.10, 0.004-0.055, 0.14-1.19, 0.014-0.070, and 4.57-15.94 μg/g wet weight, respectively. The As concentrations were higher than the Chinese maximum permissible levels in all of the fish and shellfish species and two crustacean species, indicating that consumption of these wild species by humans may pose health risks. However, calculations of the health risks posed to humans indicated that no significant adverse health effects would be associated with consuming these species. © 2016 Elsevier B.V. Source


Liu H.,Guangdong Provincial Key Laboratory of Fishery Ecology and Environment | Shen P.,CAS South China Sea Institute of Oceanology | Li C.,Guangdong Provincial Key Laboratory of Fishery Ecology and Environment | Chen Z.,Guangdong Provincial Key Laboratory of Fishery Ecology and Environment | And 2 more authors.
Journal of Ocean University of China | Year: 2016

Ciliates are very important components in most marine ecosystem. They are trophic link between the microbial food web and grazing food chain. In this study, ciliates were collected from 11 sites in the southern South China Sea (SCS) during August 25 to September 28, 2011. Their composition and distribution at the surface and 75 m deep depth of the ocean were studied. A total of 30 species belonging to 22 genera were identified, and 22 species of 15 genera were Tintinnids. Eutintinnus fraknoii and E. stramentus were the most common species. The other dominants were strombidiids ciliates including Strombidium conicum and S. globosaneum, which were followed by the tide form, Mesodinium pulex. Ciliates abundance ranged from 46 ind L-1 to 368 ind L-1 in the open sites, 46–368 ind L-1 at surface and 73–198 ind L-1 at 75 m deep layer. In the Yongshu reef, ciliates abundance ranged from 167 ind L-1 to 365 ind L-1 in the water column, similar to that in Sanya coral reef waters. Ciliates composition showed obvious difference between surface and 75 m deep layer at station S2 (P < 0.05), while no similar result was observed at other sites. At 75 m deep layer, salinity was negatively related to mixed layer depth (P < 0.05), but positively to chlorophyll a concentration (P < 0.05), indicating that the change of vertical mixing in water column influenced vertical distribution of ciliates in the southern SCS. © 2016, Science Press, Ocean University of China and Springer-Verlag Berlin Heidelberg. Source


Gu Y.-G.,Guangdong Provincial Key Laboratory of Fishery Ecology and Environment | Gu Y.-G.,Key Laboratory of South China Sea Fishery Resources Development and Utilization | Gu Y.-G.,CAS South China Sea Fisheries Research Institute | Lin Q.,Guangdong Provincial Key Laboratory of Fishery Ecology and Environment | And 14 more authors.
Marine Pollution Bulletin | Year: 2015

We investigated the total concentrations of heavy metals in surface sediments and nekton, along with sediment metal chemical partitioning in Qinzhou Bay of the Beibu Gulf. Cd was preferentially associated with the acid-soluble fraction and Pb mainly with the reducible fraction, whereas a major portion of Cr, Ni, Cu, and Zn was strongly associated with the residual fractions. A principal component analysis (PCA) in sediment metal speciation revealed three groupings (Cd; Pb; Cr, Ni, Cu, and Zn) that mainly resulted from different distributions of the metals in the various fractions. The Cr concentrations in nekton species were higher than maximum Cr concentrations permitted by the Chinese National Standard (GB 2762-2012). Taking as a whole, surface sediments of Qinzhou Bay had a 21% incidence calculation of adverse biological effects, based on the mean probable-effects-levels quotient. A human health risk assessment indicated no significant adverse health effects from consumption of nekton. © 2015 Elsevier Ltd. Source


Gu Y.-G.,CAS South China Sea Fisheries Research Institute | Gu Y.-G.,Guangdong Provincial Key Laboratory of Fishery Ecology and Environment | Gu Y.-G.,Key Laboratory of South China Sea Fishery Resources Development and Utilization | Wang X.-N.,CAS South China Sea Fisheries Research Institute | And 17 more authors.
Ecotoxicology and Environmental Safety | Year: 2016

The fuzzy comprehensive assessment was undertaken to evaluate the marine sediment quality in Daya Bay, China based on the monitoring data of 2015 and China National Standard for Marine Sediment Quality (GB 18668-2002). The results demonstrated that the average metal concentrations (mg/kg) were 0.08 (Cd), 51.30 (Pb), 91.30 (Cr), 29.63 (Cu), 143.42 (Zn), 0.03 (Hg), and 7.31 (As), which were clearly higher with respect to their corresponding background values. Cr was the major pollutant based weight matrices calculated. Taken as whole, the membership degree of class I was a range from 0.65 to 1, suggesting that the marine sediment quality in Daya Bay belongs to class I. Pb stable isotopic analysis coupled with geographic information system (GIS) approach showed the sedimentary Pb mainly originated from petrochemical industry at northwest coast of Daya Bay. © 2015 Elsevier Inc. Source

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