Investigation of the methanogen-related archaeal population structure in shallow sediments of the Pearl River Estuary, Southern China

2013 ◽  
Vol 54 (6) ◽  
pp. 482-490 ◽  
Author(s):  
Jinquan Chen ◽  
Fengping Wang ◽  
Yanping Zheng ◽  
Lijing Jiang ◽  
Xiang Xiao
2011 ◽  
Vol 99 (4) ◽  
pp. 739-751 ◽  
Author(s):  
Lijing Jiang ◽  
Yanping Zheng ◽  
Jinquan Chen ◽  
Xiang Xiao ◽  
Fengping Wang

2013 ◽  
Vol 67 (1) ◽  
pp. 41-50 ◽  
Author(s):  
Jinquan Chen ◽  
Fengping Wang ◽  
Lijing Jiang ◽  
Xijie Yin ◽  
Xiang Xiao

The Holocene ◽  
2011 ◽  
Vol 22 (6) ◽  
pp. 705-715 ◽  
Author(s):  
Fengling Yu ◽  
Yongqiang Zong ◽  
Jeremy M Lloyd ◽  
Melanie J Leng ◽  
Adam D Switzer ◽  
...  

Water ◽  
2020 ◽  
Vol 12 (11) ◽  
pp. 3245
Author(s):  
Lixia Niu ◽  
Pieter van Gelder ◽  
Xiangxin Luo ◽  
Huayang Cai ◽  
Tao Zhang ◽  
...  

The Pearl River estuary is an ecologically dynamic region located in southern China that experiences strong gradients in its biogeochemical properties. This study examined the seasonality of nutrient dynamics, identified related environmental responses, and evaluated how river discharge regulated nutrient sink and source. The field investigation showed significant differences of dissolved nutrients with seasons and three zones of the estuary regarding the estuarine characteristics. Spatially, nutrients exhibited a clear decreasing trend along the salinity gradient; temporally, their levels were obviously higher in summer than other seasons. The aquatic environment was overall eutrophic, as a result of increased fluxes of nitrogen and silicate. This estuary was thus highly sensitive to nutrient enrichment and related pollution of eutrophication. River discharge, oceanic current, and atmospheric deposition distinctly influenced the nutrient status. These factors accordingly may influence phytoplankton that are of importance in coastal ecosystems. Phytoplankton (in terms of chlorophyll) was potentially phosphate limited, which then more frequently resulted in nutrient pollution and blooms. Additionally, the nutrient sources were implied according to the cause–effect chains between nutrients, hydrology, and chlorophyll, identified by the PCA-generated quantification. Nitrogen was constrained by marine-riverine waters and their mutual increase-decline trend, and a new source was supplemented along the transport from river to sea, while a different source of terrestrial emission from coastal cities contributed to phosphate greatly.


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