Nitrogen removal in the sediments of the Pearl River Estuary, China: Evidence from the distribution and forms of nitrogen in the sediment cores

Sediment cores were collected from four outlets in the Pearl River Estuary (Guangdong Province, China) and dated using the 210Pb method to investigate the pollution history of the area due to its relatively stable sedimentation status and hydrographic conditions in recent decades. The ages of the sediment cores were dated over 40 years (1968–2015). The concentrations at the four outlets ranged from 2.21 to 48.52 ng g−1 dw for nonylphenol and were non-detectable for 23.64 ng g−1 dw for bisphenol A (BPA), which exhibited a decreasing trend from north to south as well as seaward. The fluxes (2.84 to 112.91 ng cm−2 yr−1 and non-detectable to 59.33 ng cm−2 yr−1 for nonylphenol and bisphenol A, respectively) stabilized in the 1980s to 1990s due to the construction of sewage treatment systems. The fluxes increased again in the 21st century, which reached a peak ca. 2010 but declined in recent years due to the establishment of regulations and the decreasing number of industrial enterprises. Fluctuations in the pollution composition coincided with industrial development and governmental policies.

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Temporal trends of hydrocarbons in sediment cores from the Pearl River Estuary and the northern South China Sea

Environmental Pollution ◽

10.1016/j.envpol.2008.01.037 ◽

2008 ◽

Vol 156 (2) ◽

pp. 442-448 ◽

Cited By ~ 26

Author(s):

Xianzhi Peng ◽

Zhendi Wang ◽

Yiyi Yu ◽

Caiming Tang ◽

Hong Lu ◽

...

Keyword(s):

South China Sea ◽

South China ◽

Northern South China Sea ◽

Sediment Cores ◽

Temporal Trends ◽

River Estuary ◽

Pearl River Estuary ◽

Pearl River ◽

The Pearl River Estuary ◽

The Pearl River

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Effects of climate change and fishing on the Pearl River Estuary ecosystem and fisheries

Reviews in Fish Biology and Fisheries ◽

10.1007/s11160-019-09574-y ◽

2019 ◽

Vol 29 (4) ◽

pp. 861-875

Author(s):

Zeyu Zeng ◽

William W. L. Cheung ◽

Shiyu Li ◽

Jiatang Hu ◽

Ying Wang

Keyword(s):

Climate Change ◽

River Estuary ◽

Pearl River Estuary ◽

Pearl River ◽

The Pearl River Estuary ◽

The Pearl River

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The Role of Environmental Factors on the Fishery Catch of the Squid Uroteuthis chinensis in the Pearl River Estuary, China

Journal of Marine Science and Engineering ◽

10.3390/jmse9020131 ◽

2021 ◽

Vol 9 (2) ◽

pp. 131

Author(s):

Dongliang Wang ◽

Lijun Yao ◽

Jing Yu ◽

Pimao Chen

Keyword(s):

River Estuary ◽

Pearl River Estuary ◽

Sea Surface ◽

Spatiotemporal Variability ◽

Pearl River ◽

Coastal Current ◽

Catch Per Unit Effort ◽

Chl A ◽

The Pearl River Estuary ◽

The Pearl River

The Pearl River Estuary (PRE) is one of the major fishing grounds for the squid Uroteuthis chinensis. Taking that into consideration, this study analyzes the environmental effects on the spatiotemporal variability of U. chinensis in the PRE, on the basis of the Generalized Additive Model (GAM) and Clustering Fishing Tactics (CFT), using satellite and in situ observations. Results show that 63.1% of the total variation in U. chinensis Catch Per Unit Effort (CPUE) in the PRE could be explained by looking into outside factors. The most important one was the interaction of sea surface temperature (SST) and month, with a contribution of 26.7%, followed by the interaction effect of depth and month, fishermen’s fishing tactics, sea surface salinity (SSS), chlorophyll a concentration (Chl a), and year, with contributions of 12.8%, 8.5%, 7.7%, 4.0%, and 3.1%, respectively. In summary, U. chinensis in the PRE was mainly distributed over areas with an SST of 22–29 °C, SSS of 32.5–34‰, Chl a of 0–0.3 mg × m−3, and water depth of 40–140 m. The distribution of U. chinensis in the PRE was affected by the western Guangdong coastal current, distribution of marine primary productivity, and variation of habitat conditions. Lower stock of U. chinensis in the PRE was connected with La Niña in 2008.

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