Distribution of nutrients and eutrophication assessment in the Bohai Sea of China

Wang, Xiulin; Cui, Zhengguo; Guo, Qing; Han, Xiurong; Wang, Jiangtao

doi:10.1007/s00343-009-0177-x

Cited by 89 publications

(26 citation statements)

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“…The concentration and composition of organic and inorganic nutrients can be greatly altered by autochthonous production and consumption [8]. In our case, the saltworks pump seawater from the Bohai Sea, which is considered a highly eutrophicated environment due to the dense human coastal population, high industrial discharge, and weak sea currents [23]. Thus, the high microbiological richness and biodiversity observed in the Bohai Bay saltworks can be linked to the nutrient-rich seawater source [9].…”

Section: Discussionmentioning

confidence: 99%

Bacterial Diversity in Bohai Bay Solar Saltworks, China

Zhang

Deng

et al. 2015

Curr Microbiol

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The microbiota in solar salterns plays an important role in salt production quantitatively and qualitatively. Bohai Bay coast is the major sea salt producing area in China. However, few ecological characterization studies of the Bohai Bay salt ponds, particularly of their microbial diversity, have been conducted. This study investigated the structure and diversity of the bacterial community in Hangu saltworks in response to environmental factors. The brine water was sampled from five selected saltponds within a salinity range of 5.0-19.3% in May, July, and October, 2012. Phylogenetic analysis based on the denaturing gradient gel electrophoresis (DGGE) patterns of the PCR-amplified 16S rRNA gene fragment showed that, rather than pond salinity, especially the month of sampling influenced the structure of the bacterial community in the saltponds, which may be related to the water temperature or other factors fluctuating over the months. Moreover, canonical correspondence analysis of biological and physico-chemical parameters indicated that especially other environmental factors such as nitrogenous and phosphorous nutrient contents and pH structured the microbial community. The relatively high range-weighted richness index and Shannon-Wiener index (H') observed in this study reflect the high level of richness and biodiversity present, though there were substantial fluctuations over the months and salinities of sampling. The fragment of 16S rRNA gene sequence recovered from DGGE bands indicated that the bacterial assemblage in Hangu Saltworks was dominated by members of γ-Proteobacteria (34% of total sequences obtained), followed by Firmicutes (14%) and Bacteroidetes (9%).

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Section: Discussionmentioning

confidence: 99%

Bacterial Diversity in Bohai Bay Solar Saltworks, China

Zhang

Deng

et al. 2015

Curr Microbiol

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“…The eutrophication assessment was based on whether the eutrophication index (E value) was greater than or equal to 1 in the nutritional status index method (Wang et al 2009), where E=COD×DIN (mg L −1 )×DIP (mg L −1 )×10 6 /4,500. An E value higher than 1 indicates the eutrophication condition; the higher the E value, the more serious the eutrophication condition.…”

Section: Methodsmentioning

confidence: 99%

Eutrophication assessment and bioremediation strategy in a marine fish cage culture area in Nansha Bay, China

et al. 2009

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On the basis of field data measured during four cruises from January to November 2007, variations in the characteristics of dissolved inorganic nitrogen and phosphate were analyzed in Nansha marine fish cage culture area, Ningbo City, China. Dissolved inorganic nitrogen (DIN) was selected as the parameter to balance seaweed absorption and fish DIN production. The contents of DIN and phosphate varied with different seasons, and eutrophication index (E) value ranged from 2.41 to 15.99, indicating serious eutrophication conditions; the annual average value of N/P of 32.95 indicates a nitrogen surplus in this system. The eutrophication condition in Nansha Bay was mainly caused by the fish cage culture activities. Based on their biological characteristics, Laminaria and Gracilaria were selected as the bioremediation species in winter and spring and summer and autumn, respectively. The optimal co-cultivation proportion of fish cage to Laminaria and Gracilaria in this bay was 1 cage, 450 m 2 and one cage, 690 m 2 , respectively.

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“…In recent years, the ecological environments of the Bohai Sea and the Yellow Sea have changed dramatically under dual influences of human activities and natural environmental factors (Pan and Wang, 2012; Gao et al, 2014a,b); especially in the water column of the Bohai Sea, P concentration displayed a decreasing tendency (Zhang et al, 2004;Liu et al, 2004a;Wang et al, 2009;Liu et al, 2011a). Xia et al (2009) E-mail address: xlgao@yic.ac.cn (X. Gao).…”

Section: Introductionmentioning

confidence: 99%

Geochemical characteristics of phosphorus in surface sediments of two major Chinese mariculture areas: The Laizhou Bay and the coastal waters of the Zhangzi Island

Zhuang¹,

Gao²,

Zhang³

et al. 2014

Marine Pollution Bulletin

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a b s t r a c tPhosphorus (P) in surface sediments of the Laizhou Bay (LB) and the coastal waters around the Zhangzi Island (ZI) was analyzed. Six forms of P were separated -exchangeable or loosely sorbed P (Ads-P), aluminum-bound P (Al-P), iron-bound P (Fe-P), authigenic apatite plus CaCO 3 -bound P plus biogenic apatite (Ca-P), detrital apatite plus other inorganic P (De-P) and organic P (OP). The average contents of P in the LB were in the order: De-P > OP > Ca-P > Fe-P > Ads-P > Al-P; in the ZI, the corresponding order was De-P > OP > Fe-P > Ca-P > Ads-P > Al-P. Due to the high nutrient loadings from the surrounding rivers, TP contents in sediments of the LB were higher than in those of the ZI. The potential bio-available P (Ads-P and OP) accounted for 14.7% and 24.2% of TP in sediments of the LB and the ZI, respectively.Ó 2014 Elsevier Ltd. All rights reserved.As an important biogenic element in the ocean, phosphorus (P) directly affects the primary productivity of the ocean and has a significant impact on the marine carbon cycle (Lui and Chen, 2011;Yu et al., 2012); P is also directly related to the global climate and environmental changes (Krom et al., 2004). Hecky and Kilham (1988) pointed out that P might be the element which controlled the global marine biological productivity during a long geologic time scale (>1000 years). As an important reservoir of P in marine environment, sediment not only has a buffering effect on the P content in the overlying water, but also is an important source of P in seawater (Giblin et al., 1997;Zabel et al., 1998). Fisher et al. (1982) reported that sediments provided 28-35% of P needed in the primary productivity of coastal marine ecosystems.Both organic and inorganic forms of P are present in marine sediments. Inorganic forms of P may be adsorbed onto the surfaces of minerals, or be bound to aluminum, iron, or calcium (Föllmi, 1996;Benitez-Nelson, 2000;Łukawska-Matuszewska and Bolałek, 2008;Song, 2010). The binding forms of P in sediments have major influences on transportation, degradation, and the ultimate fate of P in marine ecosystems. Only certain forms of P can be transformed into bio-available ones after being affected by physical, chemical and biological factors, including desorption, dissolution and reduction processes (Song, 2010). After that, the bio-available forms of P are released into the overlying water. These certain forms of P become important factors affecting the trophic status of water or causing eutrophication (Eijsink et al., 2000). Therefore, research on the geochemical forms of P in sediments may help researchers understand the dynamic cycle of P in seawater and sediments, such as migration and transformation between sediments and the overlying water, and subsequent diagenesis and other geochemical processes (Zabel et al., 1998;Eijsink et al., 2000).The Laizhou Bay and the surrounding marine area of the Zhangzi Island (hereafter referred to as the Zhangzi Island for short) are important mariculture zones in China, and they are located in the B...

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Distribution of nutrients and eutrophication assessment in the Bohai Sea of China

Cited by 89 publications

References 9 publications

Bacterial Diversity in Bohai Bay Solar Saltworks, China

Bacterial Diversity in Bohai Bay Solar Saltworks, China

Eutrophication assessment and bioremediation strategy in a marine fish cage culture area in Nansha Bay, China

Geochemical characteristics of phosphorus in surface sediments of two major Chinese mariculture areas: The Laizhou Bay and the coastal waters of the Zhangzi Island

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