Environmental changes reflected by sedimentary geochemistry in recent hundred years of Jiaozhou Bay, North China

Dai, Jicui; Song, Jing; Li, Xuegang; Yuan, Huamao; Li, Ning; Zheng, Guang

doi:10.1016/j.envpol.2006.10.005

Cited by 174 publications

(63 citation statements)

References 52 publications

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“…Table 1 shows that the ranges of Al, Fe, Cd, Ni, Cu, Zn, As, Pb and Cr levels measured in this study were comparable to those reported in earlier studies (Qiu and Zhu, 2004;Qiu et al, 2005Qiu et al, , 2011. Furthermore, the ranges of these metal contents were relatively low compared to the sediments in other polluted estuaries in China, such as Jiaozhou Bay (Dai et al, 2007), Jinzhou Bay (Fan et al, 2008) and Quanzhou Bay (Yu et al, 2010). Qiu et al (2011) reported one sample with Pb content as high as 1088 mg/kg dw in the surface sediment in Hailing Bay.…”

Section: Methodssupporting

confidence: 76%

“…The risks posed by other metals, including As, Pb, Cu, Cr and Ni, were not high, either, because their contents in the surface sediments were not very high and they were mostly present in the residual fraction. Heavy metals found in the surface sediments in the non-aquafarming zone could come from multiple sources, such as industrial and municipal wastewaters, mine discharge, irrigation discharge, and local rivers and creeks, along with erosion of rocks and soil parent materials (Tanner et al, 2000;Dai et al, 2007;Meng et al, 2008;Besser et al, 2009;Cheng et al, 2009;Cheng and Hu, 2010a;Hosono et al, 2010Hosono et al, , 2011. In addition, deposition of aerosol particles emitted from vehicles, coal-fired plants and waste incineration could also be a source of heavy metals Cheng and Hu, 2010a,b).…”

Section: Heavy Metals In Surface Sedimentsmentioning

confidence: 99%

“…Arsenic (As), cadmium (Cd), chromium (Cr), copper (Cu), nickel (Ni), lead (Pb) and zinc (Zn) are some of the most common heavy metal pollutants (Hakanson, 1980;Chen et al, 1991;Wong et al, 2001). These metals can enter estuaries and coastal waters through the discharge of industrial and municipal wastewaters, storm run-off, dust deposition, mine discharge, waste incineration, and other diffuse sources (Tanner et al, 2000;Dai et al, 2007;Meng et al, 2008;Zhang et al, 2008;Cheng et al, 2009;Besser et al, 2009;Cheng and Hu, 2010a,b;Hosono et al, 2010Hosono et al, , 2011. Sediment-bound heavy metals have a tendency to adsorb and accumulate on finegrained particles that eventually move into the depositional areas (Zhang et al, 2001;Morillo et al, 2002;Jain, 2004;Man et al, 2004;Qiu et al, 2005;Singh et al, 2005;Mendiguchía et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Heavy metal pollution in sediments of a typical mariculture zone in South China

Zhang

Liu

Cheng

et al. 2012

Marine Pollution Bulletin

163

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Section: Methodssupporting

confidence: 76%

Section: Heavy Metals In Surface Sedimentsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Heavy metal pollution in sediments of a typical mariculture zone in South China

Zhang

Liu

Cheng

et al. 2012

Marine Pollution Bulletin

163

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“…It covers an area of about 390 km 2 with an average depth of about 7 m, connecting to the outside seawater via a narrow opening about 2.5 km in width (Dai et al 2007). The environmental quality of Jiaozhou Bay has deteriorated dramatically in the past three decades due to rapid development in agriculture, industry, urbanization, and mariculture in the surrounding areas (Dang et al 2008b;Gao and Chen 2012).…”

mentioning

confidence: 99%

Bacterial composition and spatiotemporal variation in sediments of Jiaozhou Bay, China

Liu

et al. 2014

J Soils Sediments

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Purpose Although coastal marine sediments harbor diverse bacteria with important ecological and environmental functions, a comprehensive view of their community characteristics is still lacking in typical environments along the China coast. We studied the diversity and composition of bacterial community in the sediment of Jiaozhou Bay and characterized their spatiotemporal patterns, aiming to analyze the effects of geographic heterogeneity, seasonal difference, anthropogenic activity, and eutrophication gradient on the bacterial ecology. Materials and methods Sixteen full-length bacterial 16S rRNA gene clone libraries were constructed from the sediment bacteria at four stations (A5, B2, D1, and D7) of Jiaozhou Bay over four seasons (February, May, August, and November). The bacterial diversity and community structure variation were analyzed. Results and discussion A total of 1088 16S rRNA gene sequences and 746 distinct operational taxonomic units (OTUs) (at 97 % sequence similarity level) were retrieved from the 16 clone libraries. Libraries of each sample revealed a high diversity, and a total of 17 bacterial phyla were identified.Bacteria lineages Proteobacteria (mostly γ-Proteobacteria and δ-Proteobacteria), Actinobacteria, Bacteroidetes, and Planctomycetes, which are commonly found in marine sediments, were the dominant divisions in our samples. Meanwhile, some uncommon phyla, such as Deinococcus-Thermus and Lentisphaerae, were also detected. Distinct spatial patterns and noticeable seasonal variations of bacteria community were observed, indicating that environmental heterogeneity in spatial variation other than in temporal variation may be more important in determining the bacterial communities. Most of the abundant OTUs were related to sequences retrieved from the heavy-metal-polluted environments, indicating that the Jiaozhou Bay might be influenced by pollution. Conclusions The bacterial communities in Jiaozhou Bay sediments are highly diverse. The four typical stations that we chose might experience different anthropogenic effects and eutrophication gradients, which shaped their bacterial community composition. The environment of Jiaozhou Bay may be under pressure exerted by multi-dimension anthropogenic activities. This study provided a novel insight into the bacterial community variations in Jiaozhou Bay, enriching knowledge about ecological bioindicators and mechanisms that maintain bacterial diversity and shape bacterial community composition.

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“…The ranges of TOC:TN ratios in Sishili Bay were close to the samples from relatively offshore areas, such as the adjacent Pearl River shelf (Zhang, 2006), but narrower than the sediments from estuary areas, including Jiaozhou Bay (Dai et al, 2007;Li et al, 2008) and the Pearl River estuary (Zhang, 2006). The d 13 C values were also close to the adjacent Pearl River shelf (Zhang, 2006) and the offshore area of the Yangtze River (Feng et al, 2008).…”

Section: Discrimination Of Organic Matter Sources From the Cores In Smentioning

confidence: 59%

A geochemical record of environmental changes in sediments from Sishili Bay, northern Yellow Sea, China: Anthropogenic influence on organic matter sources and composition over the last 100years

Wang

Chen

Richard

et al. 2013

Marine Pollution Bulletin

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a b s t r a c tTotal organic carbon (TOC), total nitrogen (TN), d 13 C and d 15 N were measured in sediment cores at three sites in Sishili Bay, China, to track the impacts of anthropogenic activities on the coastal environment over the last 100 years. The increased TOC and TN in the upper section of sediment cores indicated a eutrophic process since 1975. In comparison, the TOC and TN in the sediment core near to a scallop aquaculture area displayed a much slower increase, indicating the contribution of scallop aquaculture in mitigating eutrophication. Combined information from d 13 C, d 15 N and TOC:TN indicated an increased terrestrial signal, although organic matter sources in Sishili Bay featured a mixture of terrestrial and marine sources, with phytoplankton being dominant. Increased fertilizer use since 1970s contributed to the eutrophic process in Sishili Bay since 1975, and increased sewage discharge from 1990s has added to this process.

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Environmental changes reflected by sedimentary geochemistry in recent hundred years of Jiaozhou Bay, North China

Cited by 174 publications

References 52 publications

Heavy metal pollution in sediments of a typical mariculture zone in South China

Heavy metal pollution in sediments of a typical mariculture zone in South China

Bacterial composition and spatiotemporal variation in sediments of Jiaozhou Bay, China

A geochemical record of environmental changes in sediments from Sishili Bay, northern Yellow Sea, China: Anthropogenic influence on organic matter sources and composition over the last 100years

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