Spatial and temporal variability in the pelagic ecosystem of the East Sea (Sea of Japan): A review

Lee, Jae-Young; Kang, Dong‐Jin; Kim, Il-Nam; Rho, TaeKeun; Lee, Tongsup; Kang, Chang‐Keun; Kim, Kyung‐Ryul

doi:10.1016/j.jmarsys.2009.02.013

Cited by 72 publications

(46 citation statements)

References 72 publications

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“…The East/Japan Sea (EJS) is one of the highly productive oceanic regions in the temperate zone [Yamada et al, 2005;Ashjian et al, 2006;Lee et al, 2009]. The EJS with an area of 1.01 3 10 6 km 2 is a semienclosed marginal sea connected to the northwestern Pacific Ocean through narrow and shallow straits (i.e., Korea/ Tsushima, Tsugaru, Soya, and Tatar Straits).…”

Section: Introductionmentioning

confidence: 99%

“…Because of these ocean-like features, the EJS is considered to be an ideal place for studying oceanic processes as a ''Miniature Ocean'' [Kim and Kim, 1996;Lee et al, 2009]. The EJS is experiencing notable environmental changes (i.e., variation of water mass structure and the climate regime shift), also accompanying changes in community structure and ecosystem processes [Kim and Kim, 1996;Kim et al, 2001;Rebstock and Kang, 2003;Kang et al, 2004;Zhang and Gong, 2005;Lee et al, 2009;Gong and Suh, 2012].…”

Section: Introductionmentioning

confidence: 99%

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Summer primary productivity and phytoplankton community composition driven by different hydrographic structures in the East/Japan Sea and the Western Subarctic Pacific

et al. 2014

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The East/Japan Sea (EJS) is a highly productive marginal sea in the northwest Pacific, consisting of three basins (Ulleung Basin: UB, Yamato Basin: YB, and Japan Basin: JB). To find causes of the reportedly high primary productivity in summer in the EJS, especially in the UB, we measured primary productivity, phytoplankton composition, and other environmental variables. The water column was strongly stratified in the EJS compared with the Western Subarctic Pacific (WSP). Integrated primary productivity was two times higher in the EJS (612 mg C m 22 d 21 ) than in the WSP (291 mg C m 22 d 21 ). The vertical distributions of physicochemical and biological factors confirmed that production in the subsurface chlorophyll maximum layer in the study regions was an important factor regulating primary productivity within the water column. While picoplankton (<2.7 mm) dominated in the WSP, JB, and YB, micro/nanoplankton (2.7 mm) dominated in the UB. Contribution by picoplankton to total biomass and primary productivity in the UB was significantly lower than in the other regions. CHEMTAX analysis using marker pigments showed that diverse phytoplankton groups inhabited the study regions. Cluster and canonical correspondence analyses showed high correlation between the spatial variation in phytoplankton assemblages with the water mass properties mainly represented by water temperature and nitrate concentration. Overall, our results suggest that the hydrographic structure of water column in the study region is an important controlling factor of the biomass and productivity of phytoplankton as well as their diversity in size and taxonomic groups.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Summer primary productivity and phytoplankton community composition driven by different hydrographic structures in the East/Japan Sea and the Western Subarctic Pacific

et al. 2014

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“…Although the area of the EJS is only about 1.01 × 10 6 km 2 , it contains several deep (> 3000 m) basins and different types of subpolar fronts in the surface layer between warm and cold water masses. Because of dynamic oceanographic conditions such as large scale current systems, mesoscale eddies, subpolar front and deep water formation, the EJS has been considered as an ideal "Miniature Ocean" for studying large-scale oceanic processes (Lee et al, 2009;references therein).…”

Section: Introductionmentioning

confidence: 99%

Monthly measured primary and new productivities in the Ulleung Basin as a biological "hot spot" in the East/Japan Sea

Kwak

Lee²,

Park

et al. 2013

Biogeosciences

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Abstract. The Ulleung Basin (UB), located in the southwestern part of the East/Japan Sea (EJS), is considered having an unusually high productivity for a deep basin. Recently changes have been reported in physical, chemical, and biological properties. Here we measured the primary and new productivities in the UB using a 13C-15N dual isotope tracer technique. Measurements took place every month for the first time throughout a year for a better estimate of the annual primary production in the EJS. Temporal variations of temperature, salinity, and density (σt) in the study area were highly seasonal as expected for an ocean in the temperate zone. Nutrient distributions reflected these seasonal fluctuations in the vertical structure of the water column. Diatoms were in general the most dominant phytoplankton ranging from 15.5 to 82.2% with an average of 42.0% (S.D. = ±9.9%). Based on those average daily productivities from our monthly measurements, the annual primary, new, and regenerated production in the UB were 273.0 g C m−2 yr−1, 62.6 g N m−2 yr−1, and 48.7 g N m−2 yr−1, respectively. Our estimated high f ratio (0.59) in the UB, indicated that the predominant nitrogen source for primary production was nitrate. This is comparable with the nitrogen source in a productive coastal-upwelling region. New carbon production by phytoplankton is estimated as 145.6 g C m−2 yr−1 (S.D. = ±40.8 g C m−2 yr−1) which indicates that a large portion (53.9%) of the total annual primary production might potentially be exported from the diatom-dominated euphotic zone to a deeper zone in the UB. Further intense integrated field observations will be necessary to improve our understanding of the current marine ecosystem in the UB as an important biological production area in the EJS.

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“…The dynamics of the physical components play an important role to explain the spatial variability of pelagic fish in the environment (Bertrand et al, 2008;Lee et al, 2009). Oceanographic research have shown that several physical processes are key factors.…”

Section: Introductionmentioning

confidence: 99%

Fish larvae retention linked to abrupt bathymetry at Mejillones Bay (northern Chile) during coastal upwelling events

Rojas¹,

Landaeta²

2014

lajar

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ABSTRACT. The influence of oceanic circulation and bathymetry on the fish larvae retention inside Mejillones Bay, northern Chile, was examined. Fish larvae were collected during two coastal upwelling events in November 1999 and January 2000. An elevated fish larvae accumulation was found near an oceanic front and a zone of low-speed currents. Three groups of fish larvae were identified: the coastal species (Engraulis ringens and Sardinops sagax), associated with high chlorophyll-a levels; larvae from the families Phosichthyidae (Vinciguerria lucetia) and Myctophidae (Diogenichthys laternatus and Triphoturus oculeus), associated with the thermocline (12°C), and finally, larvae of the families Myctophidae (Diogenichthys atlanticus) and Bathylagidae (Bathylagus nigrigenys), associated with high values of temperature and salinity. The presence of a seamount and submarine canyon inside Mejillones Bay appears to play an important role in the circulation during seasonal upwelling events. We propose a conceptual model of circulation and particles retention into Mejillones Bay. The assumption is that during strong upwelling conditions the flows that move along the canyon emerge in the centre of Mejillones Bay, producing a fish larvae retention zone. Understanding the biophysical interactions responsible to trap and/or concentrate particles is essential to protect these fragile upwelling ecosystems.

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Spatial and temporal variability in the pelagic ecosystem of the East Sea (Sea of Japan): A review

Cited by 72 publications

References 72 publications

Summer primary productivity and phytoplankton community composition driven by different hydrographic structures in the East/Japan Sea and the Western Subarctic Pacific

Summer primary productivity and phytoplankton community composition driven by different hydrographic structures in the East/Japan Sea and the Western Subarctic Pacific

Monthly measured primary and new productivities in the Ulleung Basin as a biological "hot spot" in the East/Japan Sea

Fish larvae retention linked to abrupt bathymetry at Mejillones Bay (northern Chile) during coastal upwelling events

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Spatial and temporal variability in the pelagic ecosystem of the East Sea (Sea of Japan): A review

Cited by 72 publications

References 72 publications

Summer primary productivity and phytoplankton community composition driven by different hydrographic structures in the East/Japan Sea and the Western Subarctic Pacific

Summer primary productivity and phytoplankton community composition driven by different hydrographic structures in the East/Japan Sea and the Western Subarctic Pacific

Monthly measured primary and new productivities in the Ulleung Basin as a biological &quot;hot spot&quot; in the East/Japan Sea

Fish larvae retention linked to abrupt bathymetry at Mejillones Bay (northern Chile) during coastal upwelling events

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Monthly measured primary and new productivities in the Ulleung Basin as a biological "hot spot" in the East/Japan Sea