Comparison of Seawater Exchange Rate of Small Scale Inner Bays within Jinhae Bay

Kim, Nam Su; Kang, Hoon; Kwon, Min Sun; Jang, Hyo-Sang; Kim, Jong Gu

doi:10.7846/jkosmee.2016.19.1.74

Cited by 13 publications

(6 citation statements)

References 5 publications

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“…Gadeok Channel is the primary pathway for the exchange of seawater between JB and the South Sea (Figure 2). Geographic complexity and isolation have led to the natural development of extremely sluggish water circulation (mean rates of bottom-water flow: 8 (neap tide)−10 (spring tide) cm s −1 ) in JB (Hong, 2016;Kim et al, 2016). During the summer, low-salinity water, formed mainly by freshwater discharge from a number of small streams and heavy precipitation from the Asian monsoon, occupies the surface layer of JB, partially contributing to the development of stratification (Cho et al, 2002;.…”

Section: General Characteristicsmentioning

confidence: 99%

Hypoxia in Korean Coastal Waters: A Case Study of the Natural Jinhae Bay and Artificial Shihwa Bay

et al. 2018

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Several coastal regions in Korea have suffered from hypoxia since the 1970s. We present the first review of Korean coastal hypoxia, focusing on its spatiotemporal variation, controlling factors, and effects on marine ecosystems. The review considers the two hotspots of the natural Jinhae Bay (JB) and artificial Shihwa Bay (SB), which are referred to as "Korean dead zones." The hypoxia in the JB is attributed to eutrophication due to domestic and land-used waste input and thermal stratification based on the naturally sluggish water circulation, whereas the hypoxia in the SB is due to eutrophication resulting from domestic, land-used, and industrial waste input and haline stratification as a consequence of the artificially created water stagnation. The bottom-water hypoxia and stratification has led to an imbalance in nitrogen:phosphorus ratio between surface and bottom waters. Hypoxia has also created undesirable benthic community changes in the both bays: (1) mass mortality of large species and recolonization with elevated abundances of opportunists in JB, and (2) decrease of the number of species, abundance, and diversity of benthic communities in SB. Therefore, it behooves us to pay attention to these environmental changes. This review will be helpful in determining the direction of future studies of Korean coastal hypoxia.

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Section: General Characteristicsmentioning

confidence: 99%

Hypoxia in Korean Coastal Waters: A Case Study of the Natural Jinhae Bay and Artificial Shihwa Bay

et al. 2018

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“…1), dominated by semidiurnal tides with a mean tidal range of 203 cm [Lee et al, 2017]. JB is semienclosed by lands and many islands and is connected only via the narrow straits of Gadeok and Gyeonnaeryang at a low water exchange rate [Kim et al, 2016]. Freshwater inputs into JB are small, except in summer.…”

Section: Hydrographic and Microbial Data Setsmentioning

confidence: 99%

Temporal and Vertical Variation in Microbial Community Composition in Response to Physicochemical Characteristics in a Water Column of Highly Eutrophied Jinhae Bay, South Korea

et al. 2018

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Microbial communities play an essential role in marine biogeochemical cycles. Physical and biogeochemical changes in Jinhae Bay, the most anthropogenically eutrophied bay on the coasts of South Korea, are well described, but less is known about the associated changes in microbial communities. Temporal and vertical variation in microbial communities at three depths (surface, middle, and bottom) at seven time points (June to December) at the J1 sampling site were investigated on the MiSeq platform based on the 16S rRNA gene. Overall, the microbial community was dominated by Proteobacteria, Cyanobacteria, and Bacteroidetes from June to November, whereas Firmicutes were dominant in December, especially in the middle and bottom layers. The results indicate that the microbial community composition strongly varied with temporal changes in the physicochemical water properties. Moreover, the community composition differed markedly between the surface and middle layers and the bottom layer in the summer, when the water column was strongly stratified and bottom water hypoxia developed. A redundancy analysis suggested a significant correlation between physicochemical variables (i.e., temperature, salinity, and oxygen concentration) and microbial community composition. This study indicates that temporal changes in water conditions and eutrophication-induced hypoxia effectively shape the structure of the microbial community.

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Section: Introductionmentioning

confidence: 99%

“…Jinhae Bay, located in the eastern part of the south coast of South Korea, stretches for 35 km in the north-south direction and 25 km in the east-west direction, forming a complex topography (Kim et al, 2016). Small-sized bays and islands are distributed inside this semi-closed bay, having an average water depth of 10-20 m (Kim et al, 2016). Moreover, because organic matter is continuously supplied from the land, and seawater flow is weak, organic pollutants accumulate effectively, directly causing red tide release (Kwak, 2009).…”

Section: Introductionmentioning

confidence: 99%

Ichthyoplankton Assemblage Structure in Jinhae Bay, Korea

Myoung,

Ji,

et al. 2024

Journal of Coastal Research

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Comparison of Seawater Exchange Rate of Small Scale Inner Bays within Jinhae Bay

Cited by 13 publications

References 5 publications

Hypoxia in Korean Coastal Waters: A Case Study of the Natural Jinhae Bay and Artificial Shihwa Bay

Hypoxia in Korean Coastal Waters: A Case Study of the Natural Jinhae Bay and Artificial Shihwa Bay

Temporal and Vertical Variation in Microbial Community Composition in Response to Physicochemical Characteristics in a Water Column of Highly Eutrophied Jinhae Bay, South Korea

Ichthyoplankton Assemblage Structure in Jinhae Bay, Korea

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