Coastal Eutrophication caused by Effluent from Aquaculture Ponds in Jeju

Koh, Hyuk-Joon; Park, Sung-Eun; Cha, Hyung-Kee; Chang, D.P.Y.; Koo, Jun-Ho

doi:10.7837/kosomes.2013.19.4.315

Cited by 9 publications

(3 citation statements)

References 8 publications

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“…Indeed, nutrient availability in Jeju's coastal waters is strongly related to land-based, anthropogenic activities, such as land-operated fish farms which are present in the vicinity of SH. Wastewater from land-operated fish farms accounts for up to 95% of the seawater ammonium (Kwon et al, 2022), increasing coastal DIN and DIP concentrations (Choi et al, 2021), and generally contributes significantly to the nitrogen budget in the coastal waters of Jeju (Koh et al, 2013;Kim et al, 2022b). Sea water enriched in ammonium is preferred by coralline algae, which dominate SH (Nguyen et al, 2020;Kwon et al, 2022).…”

Section: Discussionmentioning

confidence: 99%

Environmental impact on marginal coastal benthic communities within the Jeju Island, South Korea temperate transition zone

Perrois,

Jöst,

Lee

et al. 2024

Front. Mar. Sci.

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Aim of studyMarine climatic transition zones are boundary areas of major climate zones, here the boundary between the subtropical and temperate zones. They present areas containing high abundance of organisms living at the limit of their physiological tolerance. These marginal populations are particularly sensitive to changes in their environment. As such, marine climatic transition zones are excellent natural playgrounds for climate change-related hypothesis testing, especially with respect to marine habitat response to ocean warming. The marginal biogenic habitats around Jeju Island, South Korea, which lies within the temperate transition zone, have gradually changed from macroalgal-dominated to hard coral-dominated habitats. Understanding the specific abiotic environmental factors that influence the distribution of the marginal populations in temperate transition zones (i.e., species at their occurrence limit) is crucial to predicting and managing temperate zone habitat changes caused by climate change. This study aims to identify the specific abiotic environmental factors that contribute to explaining the current spatial distribution of the declining temperate and expanding subtropical foundation species in Jeju waters.MethodsCoverage and composition of sessile benthic communities were determined by photo-quadrat analysis at two depths (10 m and 15 m) at three sites along the island’s south, east, and north coasts in May and November 2022. Divergences in community composition between sites were characterized in light of ten quantitative environmental parameters.ResultsOur results show that sessile foundation communities vary significantly at different sites around the island. While the south is defined by high-latitude hard corals, predominately Alveopora japonica, the east is defined by the temperate canopy-forming macroalga Ecklonia cava, and the north is characterized by coralline algae. Winter sea surface temperature, water transparency, nutrient concentration, and water movement were statistically the most impactful environmental factors determining which foundation species constitute each distinct benthic community.ConclusionThis study provides valuable baseline information on the impacts of abiotic environmental factors on marine sessile communities in a temperate transition zone.

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Section: Discussionmentioning

confidence: 99%

Environmental impact on marginal coastal benthic communities within the Jeju Island, South Korea temperate transition zone

Perrois,

Jöst,

Lee

et al. 2024

Front. Mar. Sci.

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“…on Jeju Island, accounting for more than 50% of Korea in 2021 (KOSIS 2022), and thus the discharge of aquaculture effluent water has effects on the nutrient concentration in the coastal area of Jeju (Koh et al 2013, Oh et al 2021. Nutrient concentrations in the coastal area of Jeju are influenced by the submarine groundwater discharge (Hwang et al 2005).…”

Section: A C Bmentioning

confidence: 99%

Primary production by phytoplankton in the territorial seas of the Republic of Korea

Lim¹,

Jeong²

2022

Algae

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The primary production (PP) by phytoplankton in marine ecosystems is essential for carbon cycling and fueling food webs. Hence, estimating the PP in the territorial sea of each country is a necessary step to achieving carbon neutrality. To estimate the PP in the territorial sea of the Republic of Korea from 2005 to 2021, we analyzed various physiochemical parameters, such as sea surface temperature (SST), Secchi depth, and concentrations of chlorophyll-a and nutrients in the seas of five regions, including the East Sea, West Sea, western South Sea, eastern South Sea, and the waters off Jeju Island. During the 17-year study period, the SST tended to increase, while the nutrient concentrations declined, except in the Jeju area. Overall, the PP did not show a specific temporal trend, but daily PP in the western South Sea was the highest among the five regions. Moreover, the maximum PP in the Korean territorial waters (76,450 km2 ) was estimated at 11,227 Gg C y-1, which accounts for 0.03% of the global PP. The results may give insights into a better understanding of the PP, further resource utilization, and environmental sustainability in the studied region.

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“…용존유기탄소는 해양 표층의 탄소를 물리적 혼합에 의해 저층으로 제거하 는 생물학적 펌프(biological pump)의 역할을 한다고 알 려져 있어 전 지구적 탄소순환에 큰 영향을 줄 수 있다 (Carlson et al 1994;Hansell et al 2002). 해양에서 일반 적으로 용존유기물질(DOM: dissolved organic matter)은 식물플랑크톤에 의한 유기탄소의 용존형태로의 방출 (Williams 1990), 동물플랑크톤의 섭식, 배설, 그리고 입 자성 유기물의 용해 (Nagata and Kirchman 1992 (Koh et al 2013). 1985;Orrett and Karl 1987;Walsh 1989).…”

Section: 서 론unclassified

Distributions and Sources of Dissolved Organic Matter in Seawaters Surrounding Aqua Farms on the Haengwon-ri in Jeju-Island in Summer 2015

Kim¹,

Kim²

2017

Ocean and Polar Research

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: Concentrations of dissolved organic carbon (DOC), dissolved organic nitrogen (DON), dissolved organic phosphate (DOP), and colored dissolved organic matter (CDOM) were measured in the coastal sea off inland aqua farms in northeastern Jeju Island in summer 2015. The highest concentrations of DOC, DON, and DOP were revealed in the surface water off Hado-ri where the lowest salinity conditions prevailed (31.6). The concentrations of DOC, DON, and DOP in the surface water were lower in the inner stations (SH1-1, 1-2, and 1-3) near the aqua farms of the Haengwon-ri than in the outer stations. The concentrations of DOC, DON, and DOP negatively correlated with salinity. These results indicate that the contribution of dissolved organic matter (DOM) from the aqua farms seems to be not significant. On the other hand, the higher concentrations of DON and DOP in the inner stations of Hado-ri (HD 1-1) seem to be attributed to excrement of migrating birds. The three components of CDOM (T, M, and C peaks) showed no relationship with salinity, perhaps due to various in situ productions by marine organisms and decomposition by ultraviolet radiation. The observed lower C:M ratio, an indicator of terrestrial source, and the higher biological index (BIX) of CDOM in the station off Hado-ri indicate that DOM is produced mainly by biological activity. Based on the higher humification index (HIX) of CDOM and the higher DOC:DON ratio off Haengwon-ri, refractory DOM in the inland aqua farms is likely transported to the coastal sea.

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Coastal Eutrophication caused by Effluent from Aquaculture Ponds in Jeju

Abstract: This study investigated the temporal-spatial distribution and variations in water quality parameters (temperature, salinity, pH, DO, COD,

Cited by 9 publications

References 8 publications

Environmental impact on marginal coastal benthic communities within the Jeju Island, South Korea temperate transition zone

Environmental impact on marginal coastal benthic communities within the Jeju Island, South Korea temperate transition zone

Primary production by phytoplankton in the territorial seas of the Republic of Korea

Distributions and Sources of Dissolved Organic Matter in Seawaters Surrounding Aqua Farms on the Haengwon-ri in Jeju-Island in Summer 2015

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