A5036698069- Marine Ecology and Invasive Species
- Marine Biology and Environmental Chemistry
- Marine Biology and Ecology Research
- Marine and coastal ecosystems
- Ocean Acidification Effects and Responses
- Marine and coastal plant biology
- Marine Bivalve and Aquaculture Studies
- Marine and Coastal Research
- Environmental Toxicology and Ecotoxicology
- Parasite Biology and Host Interactions
- Water Treatment and Disinfection
- Isotope Analysis in Ecology
- Identification and Quantification in Food
- Agriculture, Soil, Plant Science
- Environmental Chemistry and Analysis
- Microplastics and Plastic Pollution
- Marine and fisheries research
- Atmospheric chemistry and aerosols
- Oil Spill Detection and Mitigation
- International Maritime Law Issues
- Bacteriophages and microbial interactions
- Marine Invertebrate Physiology and Ecology
- Environmental DNA in Biodiversity Studies
- Coastal wetland ecosystem dynamics
- Insect Pheromone Research and Control
Korea Institute of Ocean Science and Technology
2013-2024
Mokpo National Maritime University
2012
Pohang University of Science and Technology
2010-2011
Korea Polar Research Institute
2010
Oceanic dimethylsulfide (DMS) released to the atmosphere affects Earth's radiation budget through production and growth of cloud condensation nuclei over oceans. However, it is not yet known whether this negative climate feedback mechanism will intensify or weaken in oceans characterized by high CO2 levels warm temperatures. To investigate effects two emerging environmental threats (ocean acidification warming) on marine DMS production, we performed a perturbation experiment coastal...
Oceanic dimethyl sulfide (DMS) is the enzymatic cleavage product of algal metabolite dimethylsulfoniopropionate (DMSP) and most abundant form sulfur released into atmosphere. To investigate effects two emerging environmental threats (ocean acidification warming) on marine DMS production, we performed a large-scale perturbation experiment in coastal environment. At both ambient temperature ∼ 2 °C warmer, an increase partial pressure carbon dioxide (pCO2) seawater (160-830 ppmv pCO2) favored...
Abstract. A mesocosm experiment was conducted to evaluate the influence of photosynthetic performance on energetic balance coastal phytoplankton, in relation community production and autotrophic phytoplankton biomass future oceans. Natural assemblages were incubated field mesocosms under ambient condition (control: ca. 400 μatm CO2 temperature), two sets potential ocean conditions (acidification: 900 temperature; greenhouse: 3 °C warmer). The performances estimated by vivo fluorometry...
We conducted a shipboard ballast water test using seawater of extreme turbidity collected from Shanghai Port (China) (>300 mg total suspended solids (TSS)/L), and normal in other ports (<100 TSS/L). All three types International Maritime Organization (IMO)-approved management system (BWMS) tested failed to properly operate because filter clogging or insufficient generation oxidants under near-fresh conditions with extremely high concentration solid during ballasting. It was also found...
Herein, we evaluate the scientific basis for managing hull fouling of ships entering Korean ports, diagnose biological risks that may occur when in-water cleaning (IWC) systems remove fouling, and present a protocol evaluating these (the Infection Modes Effects Analysis; K-IMEA). Protocol development included selection core elements scenario design IWC evaluation regrowth experiments. The K-IMEA index was designed by considering inoculation pathway attaching organisms in all processes to...
Hypoxia is a global concern, affecting marine ecosystems. In this study, we investigated the effect of low Oxygen concentration on egg hatching rate Acartia erythraea in Gamak Bay, where hypoxia frequently occurs summer. Three situ experiments were conducted June and August 2013 July 2014. Environmental parameters, including water temperature, salinity, dissolved (DO) concentration, pH, measured during experiments. Hypoxic conditions had significant negative impact A. eggs; was positively...
We examined the combined impacts of future increases <TEX>$CO_2$</TEX> and temperature on growth four marine diatoms (Skeletonema costatum, Chaetoceros debilis, didymus, Thalassiosira nordenskioeldii). The strains were incubated under different conditions: present (<TEX>$pCO_2$</TEX>: 400ppm, temperature: <TEX>$20^{\circ}C$</TEX>), acidification 1000ppm, global warming <TEX>$25^{\circ}C$</TEX>), greenhouse <TEX>$25^{\circ}C$</TEX>) conditions. Under condition higher temperatures, S. costatum...
An in situ mesocosm experiment was performed to investigate the combined effects of ocean acidification and warming on coastal phytoplankton standing stock species composition a eutrophic area temperate-subtropical region. Experimental treatments natural seawater included three CO2 two temperature conditions (present control: ~400 μatm ambient temperature, conditions: ~900 greenhouse +3 °C). We found that increased concentration benefited growth small autotrophic groups: picophytoplankton...
Weekly to biweekly measurements of the in situ egg production rate (EPR) a dominant warm-temperature copepod (Paracalanus parvus) were made from August 2009 July 2010 at coastal station, together with analysis environmental and food conditions. In addition, results 10-year survey P. parvus abundance parameters are presented. EPR ranged <1 24 eggs female–1 day–1 mean four day–1. The calculated female growth was highest 0.26 day–1, coinciding EPR, but very low winter (<0.01 day–1)....
We studied the phytoplankton communities in ballast water ships that arrived at two South Korean ports. determined potential for to invade marine environment, given specific growth rates of phytoplankton, delay before started growing, and rate which would initially disperse ports bays. Most samples originated countries such as China Japan are adjacent Korea, diatoms dominated these communities. The abundance a sample did not appear be related any particular environmental parameter, including...
We investigated the seasonal succession of phytoplankton assemblages in eastern part South Sea Korea relation to surface water masses. The study areas are under direct influence Tsushima Warm Current (TCW) throughout whole year, with its strength known be seasonally variable. region is also influenced by coastal waters (CW) driven from and East China Sea, particularly summer, as indicated low salinity water. Nutrient property TCW can reveals whether origin nutrient-rich Kuroshio or...
To estimate the effects of limitation nutrients for phytoplankton growth and its influences on short-term variations a winter community structure, we investigated abiotic biotic factors surface bottom waters at 20 stations inner offshore areas from 6 to 7 February in Gwangyang Bay, Korea. Also, several algal bio-assay studies were conducted identify any additional nutrient assemblage using water assay. The dominant species bay was diatom Skeletonema costatum, which occupied more than 70%...
To assess short-term variation of summer phytoplankton community structure in different water masses, and environmental factors were monitored from 31 stations on off the southern coasts Korea, June 18 to 20 2009. According multidimensional scaling (MDS) cluster analysis based data each station, sea was divided into two groups. The first group included south-eastern region Jeju Island, which is strongly influenced by Kuroshio warm current. second located along coastal sea, mainly comprised...
To understand the impact of environmental factors on survival success introduced species by ship ballast water, we investigated potential autotrophic phytoplankton from international commercial ships. Ballast water was collected chemical tankers that originated in three different bioregions. A laboratory experiment designed to simulate resource-limited waters tank as well eutrophic port and coastal which nutrients are plentiful. Phytoplankton population growth were significantly higher...
Copepods, the dominant member of zooplankton and major grazers phytoplankton in pelagic ecosystem, are at risk from exposure to antifouling biocides. To evaluate developmental toxicity biocides (Diuron, Irgarol 1051, Sea-nine 211) wastewater (from high-pressure water blasting (WHPB) its MeOH extract (WHPB-MeOH)) copepod Paracalanus parvus sl, we investigated chemical concentration, egg-hatching rate, nauplius mortality. WHPB samples were obtained through hull-cleaning activities involving a...
동계 진해만 광역해역의 식물플랑크톤의 군집구조와 영양염 제한 특성을 파악하고자 식물플랑크톤 군집의 정점간 비교와 환경인자간의 관계를 조사하였다. 아울러 성장에 영향을 미치는 제한영양염을 평가하기 위해서 현장수를 이용하여 생물검정실험을 수행하였다. 조사기간동안 규조류와 은편모조류는 대부분의 정점에서 전체 90% 이상을 점유하였고, 현존량은 마산만이 보다 현저히 높게 관찰되었다. DIN:DIP 비, pH, 투명도는 생물량과 유의한 양(+)의 보였다. 군집구조를 바탕으로 Cluster 분석과 MSD 분석을 한 결과 크게 3개의 그룹으로 구분되었다. 제 1그룹은 고성과 통영을 중심으로 서부해역으로 은편모조류가 현존량에 50% 이상으로 우점하였다. 2그룹은 마산만 가장 내측해역으로 높은 생물량, 낮은 투명도, 비가 관찰된 것이 특이적이였다. 3그룹은 동부수역에 해당되는 외측과 중앙해역으로 구분이 되었고, 이들 정점의 특성은 DSi:DIP 높았고, 규조류가 우점출현하였다. 절대농도와...
The possibility of successful invasion by phytoplankton assemblages in the ballast water twelve international commercial ships was investigated. Various scenarios port dilution rates with a time delay for exponential growth plankton were considered. Most samples originated countries such as Japan and China, diatoms dominated (&gt;90% abundance) these communities. To assess their survival after discharge seawater under various conditions, reintroduced into water, pier-side...
선박평형수를 통한 외래종 확산을 방지하기 위해 국제해사기구(IMO)에서는 2004년 선박평형수관리협약을 채택하였다. 이 협약에 따르면 앞으로 대부분의 선박들은 선박평형수 처리시스템을 통해서 해양 생물을 사멸 또는 제거시킨 후 배출해야 하며, 이는 플랑크톤의 생사판별방법을 통하여 이루어진다. 본 연구에서는 국제적으로 처리후 생사판별법으로 널리 사용되고 있는 fluorescein diacetate assay (FDA) 염색방법의 제한성과 이의 대안으로 Neutral red (NR) 염색방법사용 가능성을 살펴보고자 하였다. FDA 염색법은 플랑크톤 염색에 되어서 현재 가장 사용되는 방법임에도 불구하고 Ditylum brightwellii 을 제외한 모든 식물플랑크톤 대해서 낮은 염색 효율(전체 평균 효율 <50%)을 보였으며, 식물플랑크톤이 갖는 고유한 형광(적색)에 간섭을 많이 받는 것으로 나타났다. 또한 FDA는 형광파장에 노출된 빠르게 색이 바래지는 경향도 관찰되었다. 반면에...