Was Jeju Island a glacial refugium for East Asian warm-temperate plants? Insights from the homosporous fern Selliguea hastata (Polypodiaceae)

2013 ◽  
Vol 100 (11) ◽  
pp. 2240-2249 ◽  
Author(s):  
Mi Yoon Chung ◽  
Myung-Ok Moon ◽  
Jordi López-Pujol ◽  
Masayuki Maki ◽  
Tadashi Yamashiro ◽  
...  
Keyword(s):  
East Asian ◽  
Jeju Island ◽  
Glacial Refugium ◽  
Homosporous Fern ◽  
Warm Temperate

Sixteen new generic records of Korean Bryozoa from southern coastal waters and Jeju Island, East China Sea: evidence of tropical affinities

Zootaxa ◽  
2018 ◽  
Vol 4422 (4) ◽  
pp. 493 ◽  
Author(s):  
HO JIN YANG ◽  
JI EUN SEO ◽  
DENNIS P. GORDON
Keyword(s):  
Coastal Waters ◽  
Kuroshio Current ◽  
Biodiversity Hotspot ◽  
The Other ◽  
Jeju Island ◽  
Marine Biodiversity ◽  
Temperate Water ◽  
Warm Water Species ◽  
Warm Temperate ◽  
Water Species

The first records of 16 genera of cheilostome Bryozoa not previously reported for Korea are given here. All are from southern coastal waters, especially Jeju Island, which appears to be Korea’s marine-biodiversity ‘hotspot’. Jodoella koreensis n. gen. et sp. (Robertsonidridae) is new to science. Seven additional new species are described for the genera Copidozoum, Reptadeonella, Schizosmittina, Saevitella, Torquatella, Stephanollona and Plesiocleidochasma. The other genera new to the Korean fauna are Dibunostoma, Corbulella, Onychocella, Stephanotheca, Bryopesanser, Calloporina, Hippaliosina and Pleuromucrum. The Japanese Pleistocene species Calloporina hayamiae Arakawa is newly reported alive from Jeju Island. Four of the species were previously known only from the tropical Indo–West Pacific, three others are found in semitropical/warm-temperate water, and the other known genera have warm-water species, supporting data from other taxa that Korean’s southern waters, especially in the vicinity of Jeju Island, are profoundly influenced by the warm Kuroshio Current and global warming trends. Currently, at least 112 species of Bryozoa are known from Jeju Island, 101 of them Cheilostomata, representing c. 70% of all Korean cheilostome species. Four new combinations are introduced: Copidozoum canui (Sakakura) n. comb., Schizo pedicellata (Soule, Soule & Chaney) n. comb., Torquatella ensenada (Tilbrook) n. comb. and Torquatella longiuscula (Harmer) n. comb. Torquatellidae is subsumed in Celleporidae and Predanophora in Torquatella. 

scholarly journals A Disjunctive Marginal Edge of Evergreen Broad-Leaved Oak (Quercus gilva) in East Asia: The High Genetic Distinctiveness and Unusual Diversity of Jeju Island Populations and Insight into a Massive, Independent Postglacial Colonization

Genes ◽  
2020 ◽  
Vol 11 (10) ◽  
pp. 1114
Author(s):  
Eun-Kyeong Han ◽  
Won-Bum Cho ◽  
Jong-Soo Park ◽  
In-Su Choi ◽  
Myounghai Kwak ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Ecological Niche Modeling ◽  
East Asian ◽  
Glacial Refugia ◽  
Jeju Island ◽  
Evolutionary Potential ◽  
Postglacial Colonization ◽  
Low Genetic Diversity ◽  
Genetic Diversity And Structure ◽  
Edge Populations

Jeju Island is located at a marginal edge of the distributional range of East Asian evergreen broad-leaved forests. The low genetic diversity of such edge populations is predicted to have resulted from genetic drift and reduced gene flow when compared to core populations. To test this hypothesis, we examined the levels of genetic diversity of marginal-edge populations of Quercus gilva, restricted to a few habitats on Jeju Island, and compared them with the southern Kyushu populations. We also evaluated their evolutionary potential and conservation value. The genetic diversity and structure were analyzed using 40 polymorphic microsatellite markers developed in this study. Ecological Niche Modeling (ENM) has been employed to develop our insights, which can be inferred from historical distribution changes. Contrary to our expectations, we detected a similar level of genetic diversity in the Jeju populations, comparable to that of the southern Kyushu populations, which have been regarded as long-term glacial refugia with a high genetic variability of East Asian evergreen trees. We found no signatures of recent bottlenecks in the Jeju populations. The results of STRUCTURE, neighbor-joining phylogeny, and Principal Coordinate Analysis (PCoA) with a significant barrier clearly demonstrated that the Jeju and Kyushu regions are genetically distinct. However, ENM showed that the probability value for the distribution of the trees on Jeju Island during the Last Glacial Maximum (LGM) converge was zero. In consideration of these results, we hypothesize that independent massive postglacial colonization from a separate large genetic source, other than Kyushu, could have led to the current genetic diversity of Jeju Island. Therefore, we suggest that the Jeju populations deserve to be separately managed and designated as a level of management unit (MU). These findings improve our understanding of the paleovegetation of East Asian evergreen forests, and the microevolution of oaks.

East Asian monsoon variation and climate changes in Jeju Island, Korea, during the latest Pleistocene to early Holocene

2008 ◽  
Vol 70 (2) ◽  
pp. 265-274 ◽  
Author(s):  
Seung Hyoun Lee ◽  
Yong Il Lee ◽  
Ho Il Yoon ◽  
Kyu-Cheul Yoo
Keyword(s):  
Asian Monsoon ◽  
East Asian Monsoon ◽  
East Asian ◽  
Jeju Island ◽  
Early Holocene ◽  
Central China ◽  
Chinese Loess Plateau ◽  
Precipitation Event ◽  
Major Element Composition ◽  
Chinese Loess

AbstractA 4.96-m-long sediment core from the Hanon paleo-maar in Jeju Island, Korea was studied to investigate the paleoclimatic change and East Asian monsoon variations during the latest Pleistocene to early Holocene (23,000–9000 cal yr BP). High-resolution TOC content, magnetic susceptibility, and major element composition data indicate that Jeju Island experienced the coldest climate around 18,000 cal yr BP, which corresponds to the last glacial maximum (LGM). Further, these multi-proxy data show an abrupt shift in climatic regime from cold and arid to warm and humid conditions at around 14,000 cal yr BP, which represents the commencement of the last major deglaciation. After the last major deglaciation, the TOC content decreased from 13,300 to 12,000 cal yr BP and from 11,500 to 9800 cal yr BP, thereby reflecting the weakening of the summer monsoon. The LGM in Jeju Island occurred later in comparison with the Chinese Loess Plateau. Such a disparity in climatic change events between central China and Jeju Island appears to be caused by the asynchrony between the coldest temperature event and the minimum precipitation event in central China and by the buffering effect of the Pacific Ocean.

scholarly journals Reinstatement of the corticioid genus Leifia (Hymenochaetales, Basidiomycota) with a new species L. brevispora from Hubei, Central China

MycoKeys ◽  
2019 ◽  
Vol 51 ◽  
pp. 85-96
Author(s):  
Shi-Liang Liu ◽  
Yusufjon Gafforov ◽  
Xian-Ying Zhang ◽  
Hong-Ling Wang ◽  
Xue-Wei Wang ◽  
...  
Keyword(s):  
New Species ◽  
East Asian ◽  
Current Data ◽  
Central China ◽  
Viet Nam ◽  
Data Set ◽  
Generic Type ◽  
Sister Clade ◽  
Warm Temperate ◽  
A New Species

The monotypic genus Leifia was previously considered to be a later synonym of Odonticium. With the morphological and phylogenetic evidence provided by an additional four East Asian specimens, we propose to reinstate Leifia as an independent genus in Hymenochaetales. Leifia morphologically differs from Odonticium by its grandinioid hymenophore with hyphal strands, numerous thick-walled cystidia with an invaginated apical end and narrowly and thick-walled basidia. The phylogeny generated from the current data set of ITS and 28S regions indicates that Leifia forms a sister clade to Odonticium. Besides the generic type Leifiaflabelliradiata in the Leifia clade, two specimens, collected from Hubei, Central China, are newly introduced as Leifiabrevispora. This new species is the second species of Leifia and differs from the generic type by its shorter basidiospores and distribution in warm-temperate to subtropical areas in East Asia. The additional two specimens, collected from Da Lat, Viet Nam, differ morphologically, both from each other and from known species of Leifia, but more samples need to be examined before further taxonomic decisions can be made.

scholarly journals Peeling Damage of Sapling caused by the Developing Process of Roe Deer Antlers in Warm-temperate Forests of Jeju Island

2012 ◽  
Vol 14 (4) ◽  
pp. 254-259 ◽  
Author(s):  
Eun Mi Kim ◽  
Youngkyu Park ◽  
Jino Kwon ◽  
Ji Eun Kim ◽  
Chang Wan Kang ◽  
...  
Keyword(s):  
Temperate Forests ◽  
Roe Deer ◽  
Jeju Island ◽  
Warm Temperate

Maxims of Foreign Policy

Itinerario ◽  
2000 ◽  
Vol 24 (2) ◽  
pp. 62-79
Author(s):  
W.J. Boot
Keyword(s):  
Foreign Policy ◽  
Sixteenth Century ◽  
Foreign Relations ◽  
East Asian ◽  
Modern Period ◽  
Cultural Sphere ◽  
Japanese Identity

In the pre-modern period, Japanese identity was articulated in contrast with China. It was, however, articulated in reference to criteria that were commonly accepted in the whole East-Asian cultural sphere; criteria, therefore, that were Chinese in origin.One of the fields in which Japan's conception of a Japanese identity was enacted was that of foreign relations, i.e. of Japan's relations with China, the various kingdoms in Korea, and from the second half of the sixteenth century onwards, with the Portuguese, Spaniards, Dutchmen, and the Kingdom of the Ryūkū.

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