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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.