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다변량해석에 의한 여수연안해역 식물플랑크톤 군집의 변동특성
윤양호 한국물환경학회 1992 한국물환경학회지 Vol.8 No.3
Detailed analysis on the relationship between environmental conditions and phytoplankton growth was carried out the Kamak Bay, Southern Korea from January to November in 1991. Physico-chemical factors (temperature, salinity, sigma-t, dissolved inorganic nutrients such as ammonia, nitrite, nitrate, phosphate and silicate, N/P ratio) were collected 3 times a week as well as biological factors (chlorophyll a, phytoplankton species composition and cell number). The principal component analysis(PCA) proved that high density of phytoplankton biomass occurred under the condition of high temperature(=low salinity) and high concentration of dissolved inorganic nutrients. As the results of multiple regression analysis(MRA) of biological factors on physico-chemical factors as explanatory variable, phytoplankton growth was found to be controlled by some specific factor such as DIN (dissolved inorganic Nitrogen, but dinoflafellates(=phytoflageilates) growth by DIP (dissolved inorganic phosphorus) in warm seasons.
동해 울진 바다목장해역의 크기별 식물플랑크톤 생물량의 시 · 공간적 분포 특성
윤양호 한국환경생물학회 2016 환경생물 : 환경생물학회지 Vol.34 No.3
To understand size fractioned chlorophyll a and material cycles of coastal ecosystem in Uljin marine ranching area (JMRA) of East Sea, 4 times of survey were conducted from April to November 2008. Picoplankton, nanoplankton and netplankton in the surface of UMRA fluctuated with an annual mean of 0.26 μg L-1 between the lowest value of 0.03 μg L-1 and the highest value of 0.87 μg L-1, annual mean 1.32 μg L-1 between 0.11 μg L-1 and 5.60 μg L-1, annual mean 0.45 μg L-1 between no detected (nd) and 4.68 μg L-1, respectively. And the relative ratio of picoplankton, nanoplankton and netplanktons on the phytoplankton biomass was on annual average 12.9%, 65.0% and 22.1%, respectively. The 10 m layer was similar to the surface. The relative ratio of pico- and nano-plankton was higher throughout the year. That is, the material cycle of UMRA consists of a microbial food web rather than traditional food chain at a lower trophic levels. Primary production is deemed to have a higher possibility of being adjusted by top-down dynamics, such as micro-zooplankton grazing pressure rather than nutrients supply.
가막만 내만에서 거문도 도나해까지 표층 및 주상퇴적물의 와편모조 시스트 분포특
윤양호 전남대학교 수산과학연구소 2018 수산과학연구소논문집 Vol.26 No.-
This study described the spatial distribution of dinoflagellate cyst assemblages from the central parts of South sea, Korea. Samples from 6 stations revealed the occurrence of 28 species from the Groups Protoperidinod (53.6%), Gonyaulacoid (35.7%), Gymnodinioid (3.6%), Diplopsallid (3.6%) and Tuberculodinioid (3.6%). The cyst density were 53~1,378 cysts/g dry. The observed high abundance of heterothophic species (60.7%). The dominant species of dinoflagellate cysts were Protoperidinium sp. Lingulodinium polyedrum, and Protoperid nium conicum, and Gonyaulax scrippsae . As a results, inner bay of central parts of south sea of Korean Pennisular was estimated to be developed eutrophication by human and industrial activites.
북서여수해만의 해양환경과 식물플랑크톤 생물량의 시?공간적 변화와 기초생산자의 성장제한 영양염의 변화
윤양호,서수환 전남대학교 수산과학연구소 2013 수산과학연구소논문집 Vol.21 No.-
To investigate spatio-temporal variations in marine environments such as water types and nutrients (nitrogen, phosphorus and silicon) and phytoplankton biomass in the northwestern area of Yeosuhae bay, as well as variations of limiting factor for phytoplankton growth, this researcher conducted a field survey for four seasons of 2012. According to the results of the survey, the marine environment of Yeosuhae bay showed that the water in winter and spring water had low temperature and high salinity, the water in summer had high temperature and high salinity and the water in fall had high temperature and low salinity. The water quality in the bay changed drastically depending on the season; however, nitrogen and silicon were provided by waters from inland and phosphorate levels were strongly affected by a nearby industrial complex. Variations in phytoplankton biomass as chlorophyll a concentration in the present study area, compared to those in Korean southwester sea, was found to be high in winter and summer and low in spring and fall. In particular, the fall survey which was conducted right after the occurrence of a large typhoon, indicated many differences from the general marine environments. The standing crop in spring was higher than that in winter, but biomass in spring was lower. As a result, no systematic relations between standing crop and biomass were found. In addition, during the time when a coastal industrial complex in Gwangyang bay near Yeosuhae bay was first built and while it was operating (i,e., between the late 1970s and the 200s), the growth-limiting nutrient for phytoplankton was nitrogen, but now it was found to be phosphorus. In other words, the phosphate that was abnormally high in density during the time when the complex was operating was found to be improved through the management of the quality of waters flowing into Gwangyang bay and the change to the industrial structure of the complex. It is believed that these results will be able to be used as good examples in managing the water quality in eutrophied bays.