Institution
Korean Ocean Research and Development Institute
Facility•Busan, South Korea•
About: Korean Ocean Research and Development Institute is a facility organization based out in Busan, South Korea. It is known for research contribution in the topics: Sea surface temperature & Gene. The organization has 1770 authors who have published 3032 publications receiving 50142 citations.
Topics: Sea surface temperature, Gene, Sediment, Bay, Population
Papers published on a yearly basis
Papers
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TL;DR: Both the magnitude and sign of the effect of pCO2 on possible future oceanic DMS production were strongly linked to p CO2-induced alterations to the phytoplankton community and the cellular DMSP content of the dominant species and its association with micrograzers.
Abstract: Oceanic dimethyl sulfide (DMS) is the enzymatic cleavage product of the algal metabolite dimethylsulfoniopropionate (DMSP) and is the most abundant form of sulfur released into the atmosphere. To investigate the effects of two emerging environmental threats (ocean acidification and warming) on marine DMS production, we performed a large-scale perturbation experiment in a coastal environment. At both ambient temperature and ∼2 °C warmer, an increase in partial pressure of carbon dioxide (pCO2) in seawater (160–830 ppmv pCO2) favored the growth of large diatoms, which outcompeted other phytoplankton species in a natural phytoplankton assemblage and reduced the growth rate of smaller, DMSP-rich phototrophic dinoflagellates. This decreased the grazing rate of heterotrophic dinoflagellates (ubiquitous micrograzers), resulting in reduced DMS production via grazing activity. Both the magnitude and sign of the effect of pCO2 on possible future oceanic DMS production were strongly linked to pCO2-induced alteration...
37 citations
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University of Paris1, University of Nantes2, University of Warwick3, Centre national de la recherche scientifique4, French Alternative Energies and Atomic Energy Commission5, Université Paris-Saclay6, Korea Maritime and Ocean University7, Korean Ocean Research and Development Institute8, Korea University of Science and Technology9
TL;DR: Comparison of core protein sequences highlighted variants specific to cold thermotypes, notably involved in carotenoid biosynthesis and the oxidative stress response, revealing that long-term adaptation to thermal niches relies on amino acid substitutions rather than on gene content variation.
Abstract: Marine picocyanobacteria of the genera Prochlorococcus and Synechococcus are the most abundant photosynthetic organisms on Earth, an ecological success thought to be linked to the differential partitioning of distinct ecotypes into specific ecological niches. However, the underlying processes that governed the diversification of these microorganisms and the appearance of niche-related phenotypic traits are just starting to be elucidated. Here, by comparing 81 genomes, including 34 new Synechococcus, we explored the evolutionary processes that shaped the genomic diversity of picocyanobacteria. Time-calibration of a core-protein tree showed that gene gain/loss occurred at an unexpectedly low rate between the different lineages, with for instance 5.6 genes gained per million years (My) for the major Synechococcus lineage (sub-cluster 5.1), among which only 0.71/My have been fixed in the long term. Gene content comparisons revealed a number of candidates involved in nutrient adaptation, a large proportion of which are located in genomic islands shared between either closely or more distantly related strains, as identified using an original network construction approach. Interestingly, strains representative of the different ecotypes co-occurring in phosphorus-depleted waters (Synechococcus clades III, WPC1, and sub-cluster 5.3) were shown to display different adaptation strategies to this limitation. In contrast, we found few genes potentially involved in adaptation to temperature when comparing cold and warm thermotypes. Indeed, comparison of core protein sequences highlighted variants specific to cold thermotypes, notably involved in carotenoid biosynthesis and the oxidative stress response, revealing that long-term adaptation to thermal niches relies on amino acid substitutions rather than on gene content variation. Altogether, this study not only deciphers the respective roles of gene gains/losses and sequence variation but also uncovers numerous gene candidates likely involved in niche partitioning of two key members of the marine phytoplankton.
37 citations
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TL;DR: The first Korean icebreaking research vessel, IBRV ARAON, had a sea ice field trial in the Arctic Sea during July-August, 2010 as mentioned in this paper, which was designed to break 1 m thick level ice with a flexural strength of 630kPa at a continuous speed of 3knots.
37 citations
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TL;DR: In this article, total suspended sediment (TSS) data concentrations are retrieved from two sets of satellite ocean color data (the Moderate Resolution Imaging Spectroradiometer (MODIS) onboard Aqua and the Korean G...
Abstract: Total suspended sediment (TSS) data concentrations are retrieved from two sets of satellite ocean color data (the Moderate Resolution Imaging Spectroradiometer (MODIS) onboard Aqua and the Korean G...
37 citations
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TL;DR: This is the first representation that a strict marine microorganism possessed three EHases with different enantioselectivity toward styrene oxide, and the phylogenetic analysis of the three genes showed that eeh1 was similar to microsomal EHase, while eeh2 and eeh3 could be grouped with soluble EHased.
Abstract: Previously, we reported that ten strains belonging to Erythrobacter showed epoxide hydrolase (EHase) activities toward various epoxide substrates. Three genes encoding putative EHases were identified by analyzing open reading frames of Erythrobacter litoralis HTCC2594. Despite low similarities to reported EHases, the phylogenetic analysis of the three genes showed that eeh1 was similar to microsomal EHase, while eeh2 and eeh3 could be grouped with soluble EHases. The three EHase genes were cloned, and the recombinant proteins (rEEH1, rEEH2, and rEEH3) were purified. The functionality of purified proteins was proved by hydrolytic activities toward styrene oxide. EEH1 preferentially hydrolyzed (R)-styrene oxide, whereas EEH3 preferred to hydrolyze (S)-styrene oxide, representing enantioselective hydrolysis of styrene oxide. On the other hand, EEH2 could hydrolyze (R)- and (S)-styrene oxide at an equal rate. The optimal pH and temperature for the EHases occurred largely at neutral pHs and 40-55 degrees C. The substrate selectivity of rEEH1, rEEH2, and rEEH3 toward various epoxide substrates were also investigated. This is the first representation that a strict marine microorganism possessed three EHases with different enantioselectivity toward styrene oxide.
37 citations
Authors
Showing all 1787 results
Name | H-index | Papers | Citations |
---|---|---|---|
Ian H. Campbell | 75 | 204 | 18767 |
Ravi Shankar | 66 | 672 | 19326 |
Claude F. Boutron | 57 | 176 | 11220 |
Carlo Barbante | 56 | 347 | 13942 |
Won Joon Shim | 56 | 211 | 10099 |
Jong-Seong Kug | 49 | 248 | 11337 |
Dong-Gyu Jo | 47 | 167 | 7599 |
Jong Seok Lee | 46 | 399 | 11661 |
Jong Seong Khim | 43 | 235 | 6783 |
Sang Hee Hong | 41 | 98 | 5804 |
Paolo Cescon | 40 | 131 | 4161 |
Jung-Hyun Lee | 38 | 215 | 5045 |
Narayanan Kannan | 38 | 140 | 6116 |
Nan Li | 38 | 183 | 5184 |
Sungmin Hong | 35 | 99 | 4130 |