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윤양호 濟州大學校海洋硏究所 1993 해양과환경연구소 연구논문집 Vol.17 No.-
A brief review of principal features of the studies on phytoplankton ecology in Cheju coastal waters is presented below: The publications on phytoplankton in Cheju coastal waters reaches 21 artcles from the 1933 to 1993. The great part of reports were carried out in the 1980s and the 1990s. A check-list of phytoplankton species in Cheju coastal waters are more than 428#species belonging to 128 genera, that is, 8 genera 10 species of blue-green algae, 1 genus 1 species of crytomonads, 31genera 116 species of dinoflagellates, 3 genera 6 species of silicoflagellates, 81 genera 291 species of diatoms, 1 genus 1 species of chloromonads, 2 genera 3 species of euglenoids and 1 genus 1 species of green algae. The dominant species are centric diatoms, Skeletonema costatum, Chaetoceros diadema, Ch. socialis and Ditylum brightwellii, through the year, while they are dinoflagellate, Prorocentrum triestinum and chloromonad, Heterosigma akashiwo in the summer seasons and pennatic diatom, Bacillaria paxillifer in the winter seasons. Cell density of phytoplankton standing stock fluctuated between 1.8×10³cells/1 in winter and 1.2×10 cells/1 in summer, and the annual average works out at roundly 105 cells/1 . Seasonal variation of phytoplandton communities are occupied by the small diatoms in spring, while by the largely species in the warm seasons. The occurrence of primary productivity maximum in the spring is associated with diatom blooming and the annual average indicates 274 gC/㎡/year in Cheju coastal waters.
주성분분석에 의한 거금수도의 수질환경 및 식물플랑크톤 변동 요인 해석
윤양호,박종식 한국환경과학회 2000 한국환경과학회지 Vol.9 No.1
A study on the variational characteristics of water quality and phytoplankton biomass by principal component analysis(PCA) was carried out in Kogum-sudo from February to October in 1993. We analyzed PCA on biological factors such as chlorophyll α and phytoplankton cell numbers for centric and pennate diatoms, phytoflagellates, and total phytoplankton as well as physico-chemical factors as water temperature, salinity, transparency, dissolved oxygen(DO), saturation of DO, apparent oxygen utilization(AOU), chemical oxygen demand(COD), nutrient (ammonia, nitrite, nitrate, phosphate and silicate), N/P ratio and suspended solid(SS). The source of nutrients supply depended on the mineralization of organic matters and inputs of seawater from outside rather than runoff of freshwater. The phytoplankton biomass was changed within short interval period by nutrients change. And it was controlled by the combination of several environmental factors, especially of light intensity, ammonia and phosphate. The marine environmental characteristics were determined by the mineralization of organic matters in winter, by runoff of freshwater including high nutrients concentration in spring, by ammonia uptake and high phytoplankton productivity in summer, and phosphate supplied input seawater from outside of Kogum -sudo in autumn. And Kogum-sudo was separated with 2 regions by score distributions of PCA. That is to say, one region was middle parts of straits which was characterized by the mixing seawater and the accumulated organic matters, other one region was Pungnam Bay and the water around Kogum Island which was done by high phytoplankyon biomass and productivity year-round.
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.
이른 여름 제주 해안 주변 해역의 해양 환경과 식물플랑크톤 군집의 분포 특성
윤양호 한국환경생물학회 2016 환경생물 : 환경생물학회지 Vol.34 No.4
This study described the spatial distributions of marine environmental factors such as water temperature, salinity, chlorophyll a concentration and turbidity, and characteristics of phytoplankton community such as species composition, standing crops and dominant species at 19 fishing ports around Jeju Island during the early summer of 2016. I analyzed bio-oceanographical characteristics using principal component analysis (PCA) of the environmental factors and biological parameters. Water temperature, salinity, chlorophyll a and turbidity ranged from 17.6 to 20.7℃, from 26.19 to 32.33 psu, from 0.76 to 7.13 μg L-1, and from 0.51 to 14.49 FTU, respectively. A total of 51 species of phytoplankton belonging to 35 genera were identified. In particular, diatoms and dinoflagellates accounted for more than 56.8% and 27.4% of all the species, respectively. Moreover, the number of phytoplankton species was controlled by salinity. Phytoplankton cell density ranged from 2.9 cells mL-1 to 185.9 cells mL-1. The dominant species were Navicula spp. Stephanopyxis turris, Eutreptiella gymnastica and Mesodinium rubrum. Environmental factors and the phytoplankton community varied greatly between sampling sites. According to PCA, the biological oceanographic characteristics of the around Jeju Island were characterized by meteorological factors such as air temperature, precipitation and discharge of ground water during early summer.
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.