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한국 남해에서 분리한 유해 침편모조류 Chattonella ovata Y. Hara et Chihara의 수온, 염분 및 광량에 대한 성장특성
노일현,윤양호,김대일,오석진,김종덕,Noh, Il-Hyeon,Yoon, Yang-Ho,Kim, Dae-Il,Oh, Seok-Jin,Kim, Jong-Deok 한국해양학회 2010 바다 Vol.15 No.3
We investigated the effects of water temperature, salinity and irradiance on the growth of the harmful algae Chattonella ovata isolated from South Sea, Korea. C. ovata grew under all combinations of water temperatures and salinity, except for all the salinity conditions at the water temperature of $10^{\circ}C$, with the salinity of 7.5 psu and 10 psu at $15^{\circ}C$, and 7.5 psu at $20^{\circ}C$ and $30^{\circ}C$. The maximum specific growth rate was $0.62\;day^{-1}$ at the combination of $30^{\circ}C$ and 30 psu. The results of two-way ANOVA indicated that growth rate depended greatly on the water temperatures while not being affected by interactions with the salinity. This indicates that C. ovata is a stenothermal and euryhaline organism, preferring high water temperatures. C. ovata did not grow at irradiance ${\leq}30\;{\mu}mol$ photons $m^{-2}s^{-1}$. Photoinhibition did not occur at $800\;{\mu}mol$ photons $m^{-2}s^{-1}$, which was the maximum irradiance used in this study. The irradiance-growth curve was described as $\mu$ = 0.74(I-16.0)/(I+43.9) at $30^{\circ}C$ and 30 psu. The half-saturation light intensity ($K_s$) was $75.9\;{\mu}mol$ photons $m^{-2}s^{-1}$ and compensation photon flux density ($I_c$) was $16.0\;{\mu}mol$ photons $m^{-2}s^{-1}$, especially this value was comparatively lower than those of Skeletonema costatum and other flagellates previously reported. Therefore, our results indicate that C. ovata has advantageous physiological characteristics for interspecific competition at the embayment and coastal areas of Korea in summer. 한국 남해에서 분리한 유해조류 Chattonella ovata의 성장에 미치는 수온과 염분 및 광량의 영향을 조사하였다. C. ovata는 $10{\sim}30\;^{\circ}C$의 수온과 7.5~40 psu의 염분조합 중 $10^{\circ}C$의 모든 염분조합과 $15^{\circ}C$의 7.5 psu와 10 psu, 그리고 $20^{\circ}C$와 $30^{\circ}C$의 7.5 psu를 제외한 모든 조합에서 성장하였다. 최대 성장속도는 $30^{\circ}C$, 30 psu 조합에서 $0.62\;day^{-1}$로 관찰되었다. 이원배치 분산분석(two-way ANOVA) 결과로부터 그들의 성장속도는 수온에 크게 의존할 뿐 염분과 교호작용의 영향은 미약하였다. 이와 같은 결과는 C. ovata가 고수온을 선호하는 광염성종임을 지시하였다. C. ovata는 $30\;{\mu}mol$ photons $m^{-2}s^{-1}$ 이하의 광량에서는 성장이 이루어지지 않았고, 본 연구에서 제공한 최대 광량인 $800\;{\mu}mol$ photons $m^{-2}s^{-1}$서 광 저해현상은 보이지 않았다. 광 조건에 의해 유도된 성장식 $\mu$=0.74(I-16.0)/(I+43.9)으로부터 성장에 대한 반포화광량($K_s$)은 $75.9\;{\mu}mol$ photons $m^{-2}s^{-1}$, 절대광량($I_c$)은 $16.0\;{\mu}mol$ photons $m^{-2}s^{-1}$로 나타났으며, 특히 $K_s$는 규조류인 Skeletonema costatum을 비롯한 다른 여러 편모조류보다 낮았다. 이상의 결과로부터 C. ovata는 하계 한국 내만과 연안해역에서 종간경쟁에 유리한 생리특성을 가진 종으로 판단되었다.
박종식,윤양호,노일현,서호영,신현호,Park, Jong-Sick,Yoon, Yang-Ho,Noh, Il-Hyeon,Soh, Ho-Young,Shin, Hyeon-Ho 한국조류학회(藻類) 2008 ALGAE Vol.23 No.2
A field survey for dinoflagellate cysts was carried out from May 2000 to November 2002 for the Southwest Sea of Korea. A total dinoflagellate cysts identified were 33 species, which belonged to 17 genera, 31 species, and 2 unidentified species. A cysts density were 16-1,501 cysts-gdry$^{-1}$. The dominant species of dinoflagellate cysts in the Southwestern Sea of Korea were Spiniferites bulloideus and Scrippsiella trochoidea, which are autotrophic species. To investigate the environmental characteristics of the Southwestern Sea of Korea using the dinoflagellate cysts, a principal component analysis (PCA) was conducted using the data collected from a total of 51 stations. From the score distribution map by the PCA, the Southwestern Sea of Korea was largely divided into three regions according to the first primary component and the second primary component. In other words, Group 1 was the western sea area of Mokpo and Jindo, Group 2 was the outer sea area of the South Sea, and Group 3 was the coastal areas of the South Sea around the Archipelago. It was found that this division of sea area was influenced by effects of the sea environment of the coastal areas of Korea. The coastal areas of Mokpo and Jindo that belong to Group 1 were affected by the cold Yellow Sea water. The outer sea area of the central parts of the South Sea that belong to Group 2, which is the boundary between the Southern coastal water of Korea and the Tsushima warm water, was subject to the formation of temperature fronts throughout the year, while Group 3 was affected by the coastal waters of Korea. It was also found that this division was in close relationship with the distribution of sediment facies in the bottom layer. From the above results, the environmental factors that influence the cyst distribution in he Southwestern Sea of Korea were found to include the eutrophication status of the sea area, the physical characteristics of the sea environment such as the flow of sea current and fronts, the sediment facies in the bottom layer, and the appearance volume of motile cells.
봄 조석에 따른 한국서남해역 수도수로 주변해역의 수질 및 표층퇴적물의 환경특성
윤양호(Yang Ho YOON),노일현(Il Hyeon NOH) 전남대학교 수산과학연구소 2008 수산과학연구소논문집 Vol.17 No.1
We carried out a study for the water quality, such as water temperature, salinity, density, extinction coefficient (EC), dissolved oxygen (DO), suspended solied (SS), chemical oxygen demand (COD), dissolved inorganic nitrogen (DIN), dissolved inorganic phosphorus (DIP), N/P ratio, silicate and chlorophyll a, and the distribution of organic matter in surface sediments, such as ignition loss (IL), acid volatile sulfide (AVS), CODs in the Sudo strait of west-southern parts of Korean peninsula during early spring 2005. Water temperature and salinity showed a well mixing water types. And according to the analysis of a T-S diagram, three characteristics of water types were identified. EC and SS showed a wide range 1.25-6.86 and 46.0~362.7 ㎎/L. EC was above 3 from almost all area except in the some northern parts. Especially, SS in surface water showed very high value with mean 112.4 ㎎/L in the neap tide and 172.8 ㎎/L in the spring tide. DIN fluctuated between 2.58 μM with the lowest mean 9.78 μM in surface water of spring tide and 22.74 μM with the highest mean 14.71 μM in bottom of neap tide. DIP was from 0.37 μM in spring tide to 0.79 μM in neap tide. N/P ratio showed the lowest mean value of 17.0 in surface water of spring tide within the range of 3.8~25.2, while it showed the highest mean value of 20.7 in surface water of neap tide within the range of 16.7~25.5. And chlorophyll a concentration was from low value of 1.61 ㎍/L in spring tide to high value of 7.50 ㎍/L in neap tide. As a results of the distribution of organic matter on surface sediments, the range of IL appeared from 2.91% to 8.92% with mean value of 5.07%. CODs showed the mean value of 15.96 ㎎/g dry within the range of 2.13~37.19 ㎎/g dry. And the range of AVS(H2S) was from no detect(ND) to 0.16 ㎎/g dry with mean value of 0.13 ㎎/g dry. The biological marine environmental characteristics in Sudo straits of west-southern parts of Korean peninsula was characterized by high concentration of nutrients influenced by animal waste, and very high values of SS and extinction coefficients by well mixing type. Therefore, the primary productivity in Sudo straits may be controlled by the irradiance.
강수기 양자강 하구 주변 표층해역의 해양환경과 식물플랑크톤 군집 분포 특성
윤양호(Yang Ho Yoon),박종식(Jong Sick Park),노일현(Il Hyeon Noh),박영균(Yeong Gyun Park),김동영(Dong Yeung Kim),서호영(Ho Young Soh),황두진(Doo Jin Hwang),정순범(Sun Beom Jeong),김용주(Yong Ju Kim),신형호(Hyeong Ho Shin) 전남대학교 수산과학연구소 2006 수산과학연구소논문집 Vol.14 No.2
We investigated the characteristics of the marine environment and phytoplankton community of surface in the adjoining sea of Yangtze river of the East China Sea in June 2005. According to the analysis of a T-S diagram, three characteristic of water masses were identified. We classified them into the mixed water mass by the Chinese continental coastal waters and Taiwan/Tsushima warm current, Chinese continental coastal waters and Taiwan/Tsushima warm current. The first water mass was characterized by high water temperature, low salinity, low density and very high Chl-a concentration. The second one was characterized by high water temperature, low salinity, low density and high Chl-a concentration and the last one was characterized by low water temperature, high salinity, high density and low Chl-a concentration. The phytoplankton community identified a total of 95 species belonging to 43 genera. The dominant species was 3 species, that is, mainly centric diatom, Skeletonema costatum in the Chinese continental coastal waters. The others one, one dinoflagellates, Prororcentrum donghaiense and one silicoflagellates, Dictyocha speculum var. otonaria in warm current regions. Standing crops of phytoplankton and Chl-a concentration were very high with ranged from 5.9 x 103 cells/L to 1.1 x 106 cells/L, and 2.90 ㎍/L to 26.40 ㎍/L, respectively. Phytoplankton productivity in the East China Sea was controlled by the discharge of Yangtze river waters which include a high concentrations of nutrients.
남해중앙부해역의 표층퇴적물중 유기물과 와편모조류 시스트 분포
박종식 ( Jong Sick Park ),윤양호 ( Yang Ho Yoon ),노일현 ( Il Hyeon Noh ),서호영 ( Ho Young Soh ) 한국환경생물학회 2005 환경생물 : 환경생물학회지 Vol.23 No.2
남해 중앙부해역의 해양환경특성을 파악하기 위해 표층 퇴적물중의 와편모조류 시스트와 유기물 분포에 대한 조사를 2002년 4월부터 2003년 1월까지 총 5회 실시하였다. 분석 항목 중 함수율, 강열감량, 화학적 산소요구량, 입자성 유기탄소, 입자성 유기질소. 식물색소량은 각각 38.7~68.9%, 3.9~12.5%, 9.60~44.05 mgO₂ gdry^(-1), 3.12~13.14 mgC gdry^(-1), 0.49~2.01 mgN gdry^(-1) 및 1.61~29.51 μg gdry^(-1) 범위로 나타났다. 시스트는 18속, 31종 2미동정으로 총 33종이 동정 되었으며, 우점종은 주로 독립영양종인 Spiniferites bulloideus와 Scrippsiella trocho-idea가 나타났으며 현존량은 42~2,880 cysts gdry^(-1) 범위로 출현하였다. 유기물 농도와 시스트 현존량은 연안해역보다 육상에서 멀리 떨어진 외해역에서 높게 나타났으며, 유기율 기원은 육상기원보다는 해역자체 생산에 의해 지배되고 있는 것으로 나타났다. 주성분분석결과 4월과 7월 모두 제1주성분은 외해 유기물 집적을, 제2주성분은 시스트 출현량에 의해 집약되는 특성으로 판단 할 수 있었으며, 득점분포도에 의해 남해 중앙부 해역은 3개의 해역으로 나누어졌다. Field survey on the marine environmental characteristics by the distribution of dinoflagellate cysts and organic matter carried out bimonthly at 14 stations in the central parts of South Sea, Korea from April 2002 to January 2003. The range of environmental factors on surface sediments such as water content, ignition loss (IL), chemical oxygen demand (CODs), particulate organic carbon (POC), particulate organic nitrogen (PON) and phaeopigment were 38.7~68.9%, 3.9~12.5%, 9.60~44.05 mgO₂ gdry^(-1), 3.12~13.14 mgC gdry^(-1), 0.49~2.01 mgN gdry^(-1) and 1.61~29.51 μg gdry^(-1), respectively. A total dinoflagellate cysts identified were 33 species, which belonged to 18 genera, 31 species, and 2 unidentified species. A cysts density were 42~2,880 cysts gdry^(-1). The dominant species of dinoflagellate cysts were Spiniferites bulloideus and Scrippsiella trochoidea all the year and autotrophic species was more abundant than heterotrophic species. The organic matter and dinoflgellate cysts were more abundant nearshore than offshore, and the origin of organic matter was autochthonous rather than from terrestrial. The two factors derived from the loading factor of PCA. Factor 1 was accumulation of oragnic matter in the offshore, factor 2 was cysts abundance, and the central parts of Korean South Sea was separated with 3 regions by score distribution of PCA.