Physical forces determine the annual bloom intensity of the giant jellyfish Nemopilema nomurai off the coast of Korea

Choi, Jiwon; Jo, Young‐Heon; Moon, Il‐Ju; Park, Jinku; Kim, Dae-Won; Lippmann, Thomas

doi:10.1016/j.rsma.2018.07.003

Cited by 17 publications

(9 citation statements)

References 38 publications

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“…The Runge‐Kutta fourth order scheme was used for time integration (Dormand & Prince, 1980).

R

is a random number between −1 and 1, and

{normalK}_{normalh}

is a horizontal diffusion coefficient adopted from the Smagorinsky (1963) mixing scheme (Choi et al., 2018; Griffies & Hallberg, 2000; Iwasaki et al., 2017). When a particle reached a land grid, it was set to be reflected elastically to the nearest ocean grid since it cannot be beached.…”

Section: Methodsmentioning

confidence: 99%

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Origin, Variability, and Pathways of East Sea Intermediate Water in a High‐Resolution Ocean Reanalysis

et al. 2021

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The East Sea Intermediate Water (ESIW) of the East/Japan Sea (hereafter EJS) is a subsurface salinity minimum layer (<34.06 psu) with low temperature (1°C-5°C) and high dissolved oxygen content (>6.5 ml/l) (K. Kim & Chung, 1984;Y.-G. Kim & Kim, 1999). It is mainly found in the Ulleung Basin (hereafter UB), and to a lesser extent in the subpolar front region near 40°N (Figure 1). The water mass is formed south of Vladivostok as a result of active air-sea interaction during the East-Asia winter monsoon (Yoon & Kawamura, 2002;Yoshikawa et al., 1999). It subducts into the subsurface layer at a depth between 200 and 400 m affecting the biogeochemistry of the western EJS. After the 2000s, anthropogenic nitrogen has significantly increased in the ESIW density layer (I.-N. Kim, Lee, et al., 2014). Son et al. (2014) showed that

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“…The Runge‐Kutta fourth order scheme was used for time integration (Dormand & Prince, 1980).

R

is a random number between −1 and 1, and

{normalK}_{normalh}

Section: Methodsmentioning

confidence: 99%

“…10.1029/2020JC017158 5 of 15 scheme (Choi et al, 2018;Griffies & Hallberg, 2000;Iwasaki et al, 2017). When a particle reached a land grid, it was set to be reflected elastically to the nearest ocean grid since it cannot be beached.…”

Section: Particle Tracking Model and Experimentsmentioning

confidence: 99%

Origin, Variability, and Pathways of East Sea Intermediate Water in a High‐Resolution Ocean Reanalysis

et al. 2021

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“…Overall, the observed differences in phenological patterns stress the close link of A. coerulea with local temperature conditions, while the lack of connection between N. nomurai and local environmental conditions support a link with physical advection from the species nursery area. Indeed, modelling approaches tracking N. nomurai distribution using combined velocity fields showed a close link between the species species presence in the Korean Peninsula and the advection of water masses from the Yellow Sea [63]. The dynamics of these jellyfish species in Korean waters is therefore shaped by hydroclimate forces playing out at disparate scales (i.e., local for A. coerulea, regional for N. nomurai) in the west Pacific region.…”

Section: Interannual Variability Of Magnitude and Timing Of Jellyfish Blooms In Korean Watersmentioning

confidence: 99%

Contrasting Effects of Regional and Local Climate on the Interannual Variability and Phenology of the Scyphozoan, Aurelia coerulea and Nemopilema nomurai in the Korean Peninsula

et al. 2021

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The East Asian marginal seas are among the most productive fisheries grounds. However, in recent decades they experienced massive proliferations of jellyfish that pose vast challenges for the management of harvested fish stocks. In the Korean Peninsula, the common bloom-formers Scyphozoan species Aurelia coerulea and Nemopilema nomurai are of major concern due to their detrimental effects on coastal socio-ecological systems. Here, we used pluriannual field observations spanning over 14 years to test the extent of climate influence on the interannual variability and bloom dynamics of A. coerulea and N. nomurai. To depict climate-jellyfish interactions we assessed partitioning effects, direct/indirect links, and the relative importance of hydroclimate forces on the variability of these species. We show that jellyfish interannual patterns and bloom dynamics are shaped by forces playing out at disparate scales. While abundance changes and earlier blooms of A. coerulea were driven by local environmental conditions, N. nomurai interannual patterns and bloom dynamics were linked with regional climate processes. Our results provide a synoptic picture of cascading effects from large scale climate to jellyfish dynamics in the Korean Peninsula that may affect fisheries sustainability due to the prominent detrimental impact these species have in the region.

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“…This response is likely due to the influence of an anomalously strong EAWM that weakens the water mass transport in the following year from February to April (Yin et al, 2018). Temporal patterns of this species are further controlled by the dominant wind field promoting N. nomurai transport from its seeding ground (e.g., west China coast) over the Yellow Sea and East China Sea, including the Korea Peninsula (Moon et al, 2010;Yoon et al, 2014;Choi et al, 2018). Hence, the intensity of N. nomurai bloom is closely intertwined with climatedriven effects, i.e., weakening of current dynamics and enhanced thermal changes (Fig.…”

Section: Jellyfish Blooms and Climate Variabilitymentioning

confidence: 99%

Jellyfish blooms challenge the provisioning of ecosystem services in the Korean coastal waters

et al. 2022

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Temperate fisheries grounds are exposed to compound effects of jellyfish proliferations and fishing pressure, which affect local fisheries, cause economic losses, and threaten seafood supply. Here, we quantify the interlink between climate variability and jellyfish blooms and their impact on the Japanese anchovy (Engraulis japonicus), in the Korean coastal waters. We used a bioclimate dataset (2010–2019) that includes quantitative information of two major bloom-former species, Aurelia coerulea and Nemopilema nomurai, in the Korean Peninsula. We show that climate phenomena governing East Asia regions explain circa half of jellyfish variability. In turn, jellyfish blooms have a significant negative effect on anchovy interannual changes (r = -0.47, P < 0.01), which varies along with the bloom magnitude. Our results indicate that the intensity of jellyfish blooms, more than their duration, has a predominant effect on anchovy and coastal fisheries production. We also suggest the possibility of using climate signals for assessing and eventually predicting, interannual abundance changes of jellyfish in the Korean Peninsula. These results stress the challenge posed by jellyfish blooms to the provisioning of ecosystem services via their influence on marine harvested fish and further highlight the need for their integration into ecosystem-based management.

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Physical forces determine the annual bloom intensity of the giant jellyfish Nemopilema nomurai off the coast of Korea

Cited by 17 publications

References 38 publications

Origin, Variability, and Pathways of East Sea Intermediate Water in a High‐Resolution Ocean Reanalysis

Origin, Variability, and Pathways of East Sea Intermediate Water in a High‐Resolution Ocean Reanalysis

Contrasting Effects of Regional and Local Climate on the Interannual Variability and Phenology of the Scyphozoan, Aurelia coerulea and Nemopilema nomurai in the Korean Peninsula

Jellyfish blooms challenge the provisioning of ecosystem services in the Korean coastal waters

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