Seasonal Variation of Lipid Profile of Oyster Crassostrea talienwhanensis from the Yellow Sea Area

Plastic pollution is a globally concerning issue in marine environments. There is currently little research about the seasonal changes in microplastics in coastal areas. Here, we report a seasonal study on the concentrations and characteristics of microplastics in the surface seawater and zooplankton of Jiaozhou Bay, a typical bay in the west Yellow Sea. The concentrations of microplastics in the surface water of Jiaozhou Bay were 0.063, 0.174, 0.094, and 0.050 pieces/m3 in February, May, August and November, respectively, with an annual average concentration of 0.095 pieces/m3, a low value compared with the plastic concentrations of other coastal areas. The size of the collected microplastics ranged from 346 to 155200 &#956;m, with an average of 5093 &#956;m. The overall percentages of fibers, fragments and plastic foams were 29%, 55% and 16%, respectively. Fragments were the most dominant shape in four seasons. Nine plastic polymers were detected from the surface water of Jiaozhou Bay. The dominant chemical composition was polypropylene (PP), accounting for 51.04% of polymers, followed by polyethylene (PE), accounting for 26.04% of polymers. The seasonal variation of plastic characteristics in Jiaozhou Bay, including the shape, color and chemical composition, was significant. The highest concentration of plastics occurred in May and the lowest concentration of plastics occurred in November. Strong rainfall resulted in an increase in the plastic concentration in May, and winds and eddies affected the spatial distribution of plastics in Jiaozhou Bay. Focused on the dominant zooplankton groups in Jiaozhou Bay, the morphology, color, size, chemical composition and quantity of MPs in zooplankton were investigated in Jiaozhou Bay. The results showed that the MPs in zooplankton of the Jiaozhou Bay were dominated by fibers. The proportions of fiber in February, May, August and November were 91%, 88%, 89% and 88%, respectively. The average size of MPs in zooplankton was 441&#177;2, 468&#177;2, 576&#177;2, and 379&#177;4&#956;m in the four seasons. For the 2 common zooplankton groups in the 4 seasons, the MP/zooplankton was 0.3, 0.26, 0.17, 0.19 for copepod, and 0.22, 0.19, 0.17, 0.45 for chaetognath, respectively.

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Seasonal variation in sediment transport and deposition on a muddy clinoform in the Yellow Sea

Continental Shelf Research ◽

10.1016/j.csr.2019.04.009 ◽

2019 ◽

Vol 179 ◽

pp. 37-51 ◽

Cited By ~ 7

Author(s):

Aimei Wang ◽

David K. Ralston ◽

Naishuang Bi ◽

Zhen Cheng ◽

Xiao Wu ◽

...

Keyword(s):

Seasonal Variation ◽

Sediment Transport ◽

Yellow Sea ◽

The Yellow Sea

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Seasonal variation of micro- and meso-plastics in the seawater of Jiaozhou Bay, the Yellow Sea

Marine Pollution Bulletin ◽

10.1016/j.marpolbul.2020.110922 ◽

2020 ◽

Vol 152 ◽

pp. 110922 ◽

Cited By ~ 5

Author(s):

Tao Liu ◽

Yongfang Zhao ◽

Mingliang Zhu ◽

Junhua Liang ◽

Shan Zheng ◽

...

Keyword(s):

Seasonal Variation ◽

Yellow Sea ◽

Jiaozhou Bay ◽

The Yellow Sea

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Seasonal variation in chromophoric dissolved organic matter and relationships among fluorescent components, absorption coefficients and dissolved organic carbon in the Bohai Sea, the Yellow Sea and the East China Sea

Journal of Marine Systems ◽

10.1016/j.jmarsys.2017.12.003 ◽

2018 ◽

Vol 180 ◽

pp. 9-23 ◽

Cited By ~ 12

Author(s):

Wen-Zhuo Zhu ◽

Hong-Hai Zhang ◽

Jing Zhang ◽

Gui-Peng Yang

Keyword(s):

Organic Matter ◽

Seasonal Variation ◽

Organic Carbon ◽

Dissolved Organic Carbon ◽

Yellow Sea ◽

Bohai Sea ◽

The Yellow Sea ◽

Chromophoric Dissolved Organic Matter ◽

The East China Sea ◽

Absorption Coefficients

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Seasonal shift in community pattern of periphytic ciliates and its environmental drivers in coastal waters of the Yellow Sea, northern China

Journal of the Marine Biological Association of the United Kingdom ◽

10.1017/s002531541400143x ◽

2014 ◽

Vol 95 (2) ◽

pp. 277-288 ◽

Cited By ~ 10

Author(s):

Wei Zhang ◽

Henglong Xu

Keyword(s):

Seasonal Variation ◽

Coastal Waters ◽

Yellow Sea ◽

Winter Season ◽

Northern China ◽

The Yellow Sea ◽

Environmental Drivers ◽

Species Number ◽

Community Structures ◽

Ciliate Species

Ciliates are a primary component of the periphyton microfauna and play a crucial role in the functioning of microbial food webs. Seasonal variation in community structures of periphytic ciliate communities was studied, using glass slides as an artificial substratum, during a 1-year cycle (August 2011–July 2012) in coastal waters of the Yellow Sea, northern China. Samples were collected monthly at a depth of 1 m from four sampling stations. A total of 144 ciliate species representing 78 genera, 43 families, 17 orders and eight classes were recorded. Among these species, 31 distributed in all four seasons, while 11, 11, 13 and two forms occurred only in spring, summer, autumn and winter season, respectively. The species number and total abundance peaked in spring and autumn, with minimum values in winter. Ciliate community structures differed significantly between seasons, and were significantly correlated with the changes in environmental variables, especially temperature, pH, dissolved oxygen (DO) and the nutrients. Of 36 dominant species (top 15 ranked contributors in each season), nine (e.g. Pseudovorticella paracratera, Trochilia minuta and Zoothamnium sp.) were significantly correlated with pH, DO or nutrients. Species richness, evenness and diversity measures were significantly correlated with temperature, pH, DO or soluble reactive phosphates. Results demonstrated that periphytic ciliates exhibited a clear seasonal variation in community structures in response to environmental conditions and potentially might be used as a robust bioindicator for assessing environmental quality status in coastal waters.

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Identifying the spatio-temporal variations of Ulva prolifera disasters in all life cycle

Journal of Water and Climate Change ◽

10.2166/wcc.2021.424 ◽

2021 ◽

Author(s):

Baowei Zhang ◽

Jianzhong Guo ◽

Ziwei Li ◽

Yi Cheng ◽

Yao Zhao ◽

...

Keyword(s):

Remote Sensing ◽

Life Cycle ◽

Yellow Sea ◽

Remote Sensing Data ◽

Temporal Variations ◽

Ulva Prolifera ◽

The Yellow Sea ◽

Sensing Data ◽

Spatio Temporal ◽

Sea Area

Abstract Since 2007, Ulva prolifera disasters have occurred every year in the South Yellow Sea of China, the largest green tide disaster in the world. The inter-annual differences make such disasters monitoring and early warning difficult. This study used remote sensing data (2015–2019) to determine its spatio-temporal variations in all life cycle. The results showed a lay effect between the NDVI-mean and the coverage area of U. prolifera. The spatio-temporal distribution of U. prolifera showed stages and regional differences. From late April to early May, U. prolifera first emerged near the Subei Shoal. After development in the middle of the Yellow Sea, U. prolifera outbroke in the eastern sea area of Shandong and Jiangsu, declined in the Shandong sea area, and disappeared near Qingdao. The cycle lasted for approximately 90 days. The sea surface temperature was the necessary condition for the disaster, and the sea wind field was the main driving force for its horizontal drift. This study overcomes the poor timing and continuity of remote sensing data in the monitoring of U. prolifera. It provides a theoretical reference for forecasting the outbreak period of U. prolifera and can aid policy-makers to avert such disasters in advance.

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