Distribution and Speciation of Dissolved Iron in Jiaozhou Bay (Yellow Sea, China)

Distribution and Speciation of Dissolved Iron in Jiaozhou Bay (Yellow Sea, China)

The distribution of total dissolved iron (DFe) and its chemical speciation were studied in vertical profiles of the shallow and semi-closed Jiaozhou Bay (JZB, China) during two contrasting periods: summer (July 19th, 2011) and spring (May 10th, 2012). Samples collected from the surface, middle and bottom layers were analyzed by competitive ligand exchange-adsorptive cathodic stripping voltammet...

Dissolved Trace metal distributions and speciation in Yellow Sea, China

Speciation of Metals and Assessment of Contamination in Surface Sediments from Daya Bay, South China Sea

The contents, speciation, source factors and potential ecological risks of the selected metals (Cr, Ni, Cu, Pb, Zn, Cd and As) were analyzed in surface sediments from Daya Bay (DYB). The results show that, with the exception of Pb, metal concentrations have decreased at all sites over the past decade. The distribution features of these concentrations represent a ring shape that descends from sh...

Distribution of Bottom Trawling Effort in the Yellow Sea and East China Sea

Bottom trawling is one of the most efficient fishing activities, but serious and persistent ecological issues have been observed by fishers, scientists and fishery managers. Although China has applied the Beidou fishing vessel position monitoring system (VMS) to manage trawlers since 2006, little is known regarding the impacts of trawling on the sea bottom environments. In this study, continuou...

Outbreak of Skeletonema costatum Bloom and Its Relations to Environmental Factors in Jiaozhou Bay, China

The marine diatom Skeletonema costatum is commonly found in coastal and estuarine areas from the temperate zones to the tropical zones. Blooms caused by Skeletonema costatum have been reported in almost all the eastern coastal regions of China seas. Jiaozhou Bay, located at the middle of Yellow Sea of China, is a shallow semi-closed basin. Skeletonema costatum constitutes a major fraction of do...