A Study on the Social Finance in Jeju

Kim, Dong-Wuk; Choi, Kwang-Woong; Kang, Sang-Yum

doi:10.24907/jtir.2020.5.40.2.33

Cited by 2 publications

(3 citation statements)

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“…On each image, a point was randomly placed on each of the 100 grid cells (i.e., 100 points), and the underlying benthic organism and substrate type (i.e., sand, gravel and rock) was identified to the lowest possible taxonomic level (Supplementary Table 3; except for coralline and turf algae) based on visual information, such as texture, color, and shape. Taxonomic identification was mainly based on fieldwork taxonomic books of Jeju and Japanese coasts (Masuda et al, 1986;Sugihara et al, 2014;Kim M.-S. et al, 2022). Indeterminate annotations and motile benthic organisms, such as asteroids and other echinoderms, polychaetes, holothurians, bivalves, and gastropods were removed before statistical analyses.…”

Section: Benthic Communitymentioning

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: Benthic Communitymentioning

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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“…Faye et al (2007, 2008 provided molecular and morphological data to clarify the taxonomic status of two Meristotheca species from Japan, M. coacta Okamura, and M. imbricata E.F. Faye & M. Masuda, and suggested that further analysis is required for specimens with similar morphological features. The distribution of M. papulosa has been questioned as it has been reported from various localities based solely on morphological identification, from Korea (Lee 2008;Kim et al 2022), Japan (Faye et al 2005), China (Liu 2008), Taiwan (Lewis and Norris 1987), the Philippines (Ang et al 2014), Indonesia (Verheij and Prud'homme van Reine 1993), Pakistan (Silva et al 1996), India (Rao and Gupta 2015), South Africa (De Clerck et al 2005), Madagascar (Vieira et al 2021), and Red Sea (Einav et al 2021). On the other hand, the genetic status of Merostptjeca furgusonii Grunow ex Mazza, from Sri Lanka, Meristotheca tobagensis W.R. Talor from the Caribbean island of Tobago, and Meristotheca polychotoma (Kützing) Millar from New Caledonia required confirmation based on the reproductive features (Faye et al 2007(Faye et al , 2008Borlongan et al 2021).…”

Section: Introductionmentioning

confidence: 99%

“…Currently, two types of blades have been reported in Korea and Japan: erect in M. papulosa and prostrate in M. coacta and M. imbricata (Faye et al 2005;Lee 2008;Kim et al 2022). Faye et al (2005) documented the vegetative and reproductive morphologies of Japanese M. papulosa, with rbcL sequence analysis.…”

Section: Introductionmentioning

confidence: 99%

Molecular phylogeny and genetic diversity of the economic seaweed Meristotheca (Gigartinales, Rhodophyta) in the northwest Pacific, with a description of M. pilulaora sp. nov

Yang,

Kang,

Fujita

et al. 2023

J Appl Phycol

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Species of the red algal genus Meristotheca are important natural resources that can be used directly as food for human consumption as well as raw materials for the extraction of carrageenan. Despite being harvested in Japan and Korea, a comprehensive taxonomic study of Meristotheca specimens from these two countries to elucidate their phylogenetic position is lacking. In this study, we aimed to clarify the taxonomic identities of specimens currently regarded as M. papulosa from Korea and Japan by analyzing morphological and molecular data. As the result, we recognized a new species, Meristotheca pilulaora sp. nov. from Korea and resurrected Meristotheca japonica for specimens from Japan. The two entities have long been identified as M. papulosa and exhibit similar external morphologies. They appeared independently in the concatenated phylogenetic tree of COI-5P and rbcL and could also be distinguished morphologically by the position of cystocarps (blade margins in M. pilulaora; marginal proliferations in M. japonica), spinose cystocarps (absent in M. pilulaora; present in M. japonica), and the number of cortical cell layers (two in M. pilulaora; 4–8 in M. japonica). The DNA analysis of M. pilulaora sp. nov. in local populations showed 11 COI-5P haplotypes on Jeju Island with no apparent geographical structure. High genetic diversity and occurrence of unique haplotypes in southern Jeju may provide a genetic basis for population with high thermal tolerance. These findings have strengthened our understanding of the species diversity of the genus Meristotheca and provided insights into conservation, management, and haplotype selection for the future cultivation of these economically important species.

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A Study on the Social Finance in Jeju

Cited by 2 publications

References 0 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

Molecular phylogeny and genetic diversity of the economic seaweed Meristotheca (Gigartinales, Rhodophyta) in the northwest Pacific, with a description of M. pilulaora sp. nov

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