https://repository.kopri.re.kr/handle/201206/12728 Wed, 15 Apr 2026 04:46:36 GMT 2026-04-15T04:46:36Z https://repository.kopri.re.kr/handle/201206/13022 Title: From the High Arctic to the Equator: Do Soil Metagenomes Differ According to Our Expectations? Authors: Kerfahi, Dorsaf; Tripathi, Binu Mani; Dong, Ke; Kim, Mincheol; Kim, Hyoki; Slik, J. W. Ferry; Go, Rusea; Adams, Jonathan M. Abstract: Comparing the functional gene composition of soils at opposite extremes of environmental gradients may allow testing of hypotheses about community and ecosystem function. Here, we were interested in comparing how tropical microbial ecosystems differ from those of polar climates. We sampled several sites in the equatorial rainforest of Malaysia and Brunei, and the high Arctic of Svalbard, Canada, and Greenland, comparing the composition and the functional attributes of soil biota between the two extremes of latitude, using shotgun metagenomic Illumina HiSeq2000 sequencing. Based upon “classical” views of how tropical and higher latitude ecosystems differ, we made a series of predictions as to how various gene function categories would differ in relative abundance between tropical and polar environments. Results showed that in some respects our predictions were correct: the polar samples had higher relative abundance of dormancy related genes, and lower relative abundance of genes associated with respiration, and with metabolism of aromatic compounds. The network complexity of the Arctic was also lower than the tropics. However, in various other respects, the pattern was not as predicted; there were no differences in relative abundance of stress response genes or in genes associated with secondary metabolism. Conversely, CRISPR genes, phage-related genes, and virulence disease and defense genes, were unexpectedly more abundant in the Arctic, suggesting more intense biotic interaction. Also, eukaryote diversity and bacterial diversity were higher in the Arctic of Svalbard compared to tropical Brunei, which is consistent with what may expected from amplicon studies in terms of the higher pH of the Svalbard soil. Our results in some respects confirm expectations of how tropical versus polar nature may differ, and in other respects challenge them. Tue, 01 Jan 2019 00:00:00 GMT https://repository.kopri.re.kr/handle/201206/13022 2019-01-01T00:00:00Z https://repository.kopri.re.kr/handle/201206/13033 Title: Occurrence of Legacy and New Persistent Organic Pollutants in Avian Tissues from King George Island, Antarctica Authors: Kim, Jun-Tae; Son, Min-Hui; Kang, Jung-Ho; Kim, Jeong-Hoon; Jung, Jin-Woo; Chang, Yoon-Seok Abstract: Legacy and new persistent organic pollutants (POPs), including polychlorinated naphthalenes (PCNs), Dechlorane Plus (DPs) and related compounds (Dechloranes), hexabromocyclododecanes (HBCDs), polychlorinated biphenyls (PCBs), and organochlorine pesticides (OCPs), were analyzed in avian tissue samples from King George Island, Antarctica. The avian species consisted of the Gentoo penguin (Pygoscelis papua), the Adelie penguin (Pygoscelis adeliae), the South polar skua (Stercorarius maccormicki), and the Brown skua (Stercorarius antarcticus). HBCDs were detected in all samples and ranged from 1.67713 pg/g-lipid. In the penguin samples, the concentrations of PCNs ranged from 0.692.07 ng/g-lipid, whereas those in the skua samples ranged from 7.41175 ng/g-lipid. The levels of Dechloranes ranged from 0.601.30 ng/g-lipid in the penguin samples and from 6.5747.4 ng/g-lipid in the skua samples. The concentrations and congener distributions of OCPs and PCBs were similar to the results of previous reports. The three new POPs were detected in all samples, and this study was one of the first reports on the occurrence of these pollutants in the Antarctic biota. Because Antarctica is one of the most pristine places on Earth, the detection of new POPs in the Antarctic birds, especially penguins, is direct evidence of the long-range transport of pollutants. Furthermore, the concentration ratios of the penguin to the skua samples (BMFs-p) were greater than 1 in most legacy and new POPs, and the BMFs-p values of the new POPs were comparable to those of some OCPs, suggesting a possibility of biomagnification. Despite the small sample size, the results of this study identified POP contamination of the Antarctic avian species and long-range transport and biomagnification of HBCDs, Dechloranes, and PCNs. Tue, 17 Nov 2015 00:00:00 GMT https://repository.kopri.re.kr/handle/201206/13033 2015-11-17T00:00:00Z https://repository.kopri.re.kr/handle/201206/13043 Title: A Review on the Application of Stable Water Vapor Isotope Data to the Water Cycle Interpretation Authors: Lee, Jeonghoon; Han, Yeongcheol; Koh, Dong-Chan; Kim, Songie; Na, Un-Sung Abstract: Studies using stable water vapor isotopes have been recently conducted over the past two decades because of difficulties in analysis and sample collection in the past. Stable water vapor isotope data provide information of the moisture transport from ocean to continent, which are also used to validate an isotope enabled general circulation model for paleoclimate reconstructions. The isotopic compositions of groundwater and water vapor also provide a clue to how moisture moves from soil to atmosphere by evapotranspiration. International Atomic Energy Agency designates the stations over the world to observe the water vapor isotopes. To analyze the water vapor isotopes, a cryogenic sampling method has been used over the past two decades. Recently, two types of laser-based spectroscopy have been developed and remotely sensed data from satellites have the global coverage. In this review, measurements of isotopic compositions of water vapor will be introduced and some studies using the water vapor isotopes will also be introduced. Finally, we will suggest the future study in Korea. Mon, 31 Aug 2015 00:00:00 GMT https://repository.kopri.re.kr/handle/201206/13043 2015-08-31T00:00:00Z https://repository.kopri.re.kr/handle/201206/13122 Title: Monitoring of the POPs and their alternatives in the Antarctic ecosystem Authors: Chang, Yoon-Seok Tue, 30 Jun 2015 00:00:00 GMT https://repository.kopri.re.kr/handle/201206/13122 2015-06-30T00:00:00Z