Characteristics of distribution and community structure of marcrobenthicInvertebrates caught in the coastal waters of middle East Sea, Korea

Yoon, Byoung-Sun; Choi, Youngjoon; SOHN, Myong-Ho; KIM, Jong-Bin; Yang, Jae-Hyeong; PARK, Jeong-Ho

doi:10.3796/ksft.2016.52.4.372

Cited by 4 publications

(3 citation statements)

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“…We investigated the trophic niche of E. dofleini in two marine ranching ecosystems off the east coast of the Korean peninsula. The GPO stock is small in the study area compared with that further north (above 37.5 • N; Sohn et al, 2014;Yoon et al, 2016) and its occurrence is limited to winter-spring with small individuals in the study area, compared with all the year round in the further north of the study area with large individuals (Lee et al, 2014). This approximately establishes the southwestern margin of its distributional range.…”

Section: Trophic Niche Of E Dofleini In the Marine Ranching Food Webmentioning

confidence: 72%

Food Web Trophic Structure at Marine Ranch Sites off the East Coast of Korea

et al. 2021

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Understanding the trophic ecology of the giant Pacific octopus Enteroctopus dofleini is challenging in developing marine ranches and in reestablishing its regional stocks against the severe stress of fishing. We adopted carbon and nitrogen stable isotope techniques (termed δ13C and δ15N, respectively) to identify the trophic niche (i.e., pathways and positions) of this species systematically in the entire food webs of two marine ranches off the east coast of the Korean peninsula. While a slight spatial shift in the isotopic nestedness of faunal communities was observed, the δ13C and δ15N values of consumers were distinct and separate among functional groups at both ranches. The consumer δ13C values spanned a broad range between pelagic and benthic sources of organic matter, and their δ15N values recorded a stepwise trophic-level enrichment, indicating that suspension feeders and herbivore-deposit feeders served as baselines of pelagic- and benthic-based trophic pathways, respectively. The δ13C values of predators, including E. dofleini, were arrayed between the two primary consumer groups. Neither δ13C nor δ15N values showed any remarkable variations with increasing octopus weight. Dietary mixing-model calculations indicated that E. dofleini is a generalist predator relying on both benthic- and pelagic-affinity prey, similar to some teleost species that consume a diverse spectrum of prey. In contrast, other teleost groups showed prevalent trophic links with either pelagic- or benthic-based pathways. The trophic-level estimations revealed that E. dofleini occupies an intermediate position slightly below the teleosts. A lack of discrete trophic positions between E. dofleini and teleosts seemed to be indicative of the released teleost predation but instead reflects the imposed food competition. Overall, the results demonstrated that despite compositional changes in the taxa constituting individual trophic groups, E. dofleini occupied a very similar trophic niche in both ranching systems. Finally, as extracted from information based on octopus marine ranches launched on natural rocky bottoms, our isotopic evidence provides a greater understanding of the trophic ecology of this octopus species in nearshore natural habitats along the southwestern margin of its distribution range.

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Section: Trophic Niche Of E Dofleini In the Marine Ranching Food Webmentioning

confidence: 72%

Food Web Trophic Structure at Marine Ranch Sites off the East Coast of Korea

et al. 2021

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“…The EKWC breaks out from the Tsushima Current and characterized by a higher temperature and salinity. It also flows from the south to the north along the east coast of the Peninsula and merges with the NKCC at around 37° to 38º N latitude to form a subpolar Frontal Zone characterized by high productivity and rich biodiversity (Ashjian et al, 2005;Lee et al, 2016;Yoon et al, 2016). The East Sea water is represented by four water masses -Tsushima Surface Water, Tsushima Middle Water, North Korean Cold Water, East Sea Proper Water -defined by water temperature, salinity, dissolved oxygen and water depth (Yoon et al, 2007;Choi et al, 2012).…”

Section: Study Areamentioning

confidence: 99%

Peer Review #1 of "The chemical composition of a new “mica sandwich” foraminiferal species from the East Coast of Korea: Capsammina crassa sp. nov. (v0.1)"

Kaminski¹

2019

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We describe a new agglutinated monothalamous foraminiferal species, Capsammina crassa sp. nov., based on integrated observations of the test morphology and the chemical characteristics of materials composing the test. The new species was found at a depth of <60 m on the East coast of Korea. The test morphology is typical of the genus Capsammina, comprising two or more mica plates with a ring of finely agglutinated mineral grains sandwiched between them and surrounding the cell body. There is no distinct test aperture. Elemental analyses of the agglutinated grains revealed 15 different types of mineral grains of which quartz is the most abundant. The surface areas of grains exposed on fractured surfaces ranged from 1.6 to 7738 µm² and the large plate-like grains forming the upper and lower surfaces measured about 500 to 1200 µm (in one case 1550 µm) in width. The new species is morphologically similar to C. patelliformis, however the differences in size, distribution area and depth support that these two species are distinct. This discovery is the first record of the genus Capsammina from the North Pacific. Therefore, it extends the biodiversity and geographical distribution of the genus Capsammina, which has been reported only from the bathyal NE Atlantic. Our finding also suggests the possibility of additional discovery of monothalamous foraminifera from around Korea.

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“…The EKWC breaks out from the Tsushima Warm Current and characterized by a higher temperature and salinity. It also flows from the south to the north along the east coast of the Peninsula and merges with the NKCC at around 37°–38°N latitude to form a subpolar Frontal Zone characterized by high productivity and rich biodiversity ( Ashjian et al, 2005 ; Lee, Park & Kim, 2016 ; Yoon et al, 2016 ). The East Sea water is represented by four water masses—Tsushima Surface Water, Tsushima Middle Water, North Korean Cold Water, East Sea Proper Water—defined by water temperature, salinity, dissolved oxygen and water depth ( Yoon, Jung & Yoon, 2007 ; Choi et al, 2012 ).…”

Section: Introductionmentioning

confidence: 99%

The chemical composition of a new “mica sandwich” foraminiferal species from the East Coast of Korea:Capsammina crassasp. nov.

Lee

Châtelet

Gooday

et al. 2019

PeerJ

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We describe a new agglutinated monothalamous foraminiferal species, Capsammina crassa sp. nov., based on integrated observations of the test morphology and the chemical characteristics of materials composing the test. The new species was found at a depth of <60 m on the East coast of Korea. The test morphology is typical of the genus Capsammina, comprising two or more mica plates with a ring of finely agglutinated mineral grains sandwiched between them and surrounding the cell body. There is no distinct test aperture. Elemental analyses of the agglutinated grains revealed 15 different types of mineral grains of which quartz is the most abundant. The surface areas of grains exposed on fractured surfaces ranged from 1.6 to 7,700 μm2 and the large plate-like grains forming the upper and lower surfaces measured about 420–2,350 μm in maximum width. The new species is morphologically similar to C. patelliformis, however, the differences in size, distribution area and depth support that these two species are distinct. This discovery is the first record of the genus Capsammina from the North Pacific. Therefore, it extends the biodiversity and geographical distribution of the genus Capsammina, which has been reported only from the bathyal NE Atlantic. Our finding also suggests the possibility of additional discovery of monothalamous foraminifera from around Korea.

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Characteristics of distribution and community structure of marcrobenthicInvertebrates caught in the coastal waters of middle East Sea, Korea

Cited by 4 publications

References 0 publications

Food Web Trophic Structure at Marine Ranch Sites off the East Coast of Korea

Food Web Trophic Structure at Marine Ranch Sites off the East Coast of Korea

Peer Review #1 of "The chemical composition of a new “mica sandwich” foraminiferal species from the East Coast of Korea: Capsammina crassa sp. nov. (v0.1)"

The chemical composition of a new “mica sandwich” foraminiferal species from the East Coast of Korea:Capsammina crassasp. nov.

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