http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
북한강 수역에서 분리한 남조류 Anabaena circinalis 휴면포자 발아에 대한 환경요인의 영향
박채홍 ( Chae Hong Park ),임병진 ( Byung Jin Lim ),유경아 ( Kyoung A You ),박명환 ( Myung Hwan Park ),황순진 ( Soon Jin Hwang ) 한국하천호수학회 2014 생태와 환경 Vol.47 No.4
Akinete germination may be a starting point of some akinete-producing cyanobacterial blooms in eutrophic freshwater systems. This study examined germinability of akinete of a cyanobacterium Anabaena circinalis isolated from the sediment of the North Han River (Cheongpyung Dam), Korea, under several environmental factors such as temperature (5~25.C), light (0~100 μmol photons m-2 s-1), nutrients (nitrogen and phosphorus) and pH (5~12). The high germination rate appeared at high temperature: ¤55% at 25.C, followed by 15% at 15.C, 10.C and 10% at 5.C. Low light intensity was favorable for akinete germination. Over 45% of germination occurred at low light intensities (5, 15 and 30 μmol photons m-2 s-1), while less than 10% of germination occurred at both 50 and 100 μmol photons m-2 s-1. No germination occurred in the dark condition. Akinete germination rate increased with nutrient (phosphorus and nitrogen) enrichment, and nitrogen addition showed greater effect on the germination compared to phosphorus addition. Akinetes germinated well at neutral or slightly alkaline pH condition (pH 7 and pH 8: ¤55%), but no germination was observed at pH 11~12. The present study demonstrates some favorable ambient conditions of Anabaena circinalis germination, which could provide useful information to study the germination conditions of other Anabaena species or akinete-forming algae and predict its bloom in eutrophic freshwaters.
팔당호 현장수를 이용한 남조류 Anabaena circinalis의 발아 및 성장 잠재력 시험
박명환 ( Myung Hwan Park ),임병진 ( Byung Jin Lim ),서완범 ( Wan Bum Seo ),박채홍 ( Chae Hong Park ),김건희 ( Keon Hee Kim ),황순진 ( Soon Jin Hwang ) 한국하천호수학회(구 한국육수학회) 2015 생태와 환경 Vol.48 No.4
Akinete germination potential and algal growth potential (AGP) using Anabaena circinalis were investigated September 2014 and March 2015 at the three sites (PD-1, PD-2 and PD-3) of Lake Paldang. Nitrogen and phosphorus concentrations were higher at PD-2 than at PD-1 and PD-3. TSI (TN) values at the three field sites were in the range of 65~85, which were the level of eutrophic or hypereutrophic state. TSI (TP) also showed high values (49~68), which were the level of mesotrophic or eutrophic state. Akinete germination potential was higher at PD-2 with increased nutrient (nitrogen and phosphorus), and algal growth potential also increased with nutrient enrichment.
보문 : 식물-광물 혼합제가 부영양 수체의 수질, 플랑크톤 및 microcystin-LR에 미치는 영향
김백호 ( Baik Ho Kim ),이주환 ( Ju Hwan Lee ),박채홍 ( Chae Hong Park ),권대률 ( Dae Yul Kwon ),박혜진 ( Hye Jin Park ),문병천 ( Byeong Cheon Mun ),문병진 ( Byeong Jin Mun ),최인철 ( In Chel Choi ),김난영 ( Nan Young Kim ),민한나 한국하천호수학회(구 한국육수학회) 2011 생태와 환경 Vol.44 No.4
We examined two reservoirs (lnkyung res. and Joongang res.) and two streams (Kyungan str. and Jecheon str.), all of which were eutrophic, during the 2010 warm season, to evaluate the water quality improvement activity (WQIA) of plant-mineral composite (PMC), which was previously developed to control suspended solids, including cyanobacterial bloom (Kim et al., 2010). We simultaneously measured both solid (S-MCLR) and dissolved microcystin-LR (D-MCLR), before and after PMC treatment, in the Joongang reservoir. Taking water body size and volume into account, we conducted the whole-scale experiment in the Inkyung reservoir, and mesocosm-scale experiments in the other three systems. The WQIAs of PMC were found to be comparatively high in SS (70~81%), TP (75~91%), BOD (65~91%), Chl-a (88~98%), phytoplankton(84~92%) and zooplankton(68~88%), except for the Kyungan stream, which was below 45% in all parameters. After PMC treatment, the concentrations of both SMCLR (47%) and D-MCLR (96%) decreased within two days, suggesting a mitigation possibility of hazardous chemicals such as agrochemicals and endocrine disrupters in the aquatic ecosystem. Our results collectively indicate that PMC is a useful agent to control suspended solids, including nuisance cyanobacterial bloom and their exudates, in an undisturbed water system with a long residence time.
CO2와 수온 증가에 대한 봄철 저수온기 팔당호 식물플랑크톤군집 변화
이가람 ( Ka Ram Lee ),성은주 ( Eun Ju Sung ),박혜진 ( Hye Jin Park ),박채홍 ( Chae Hong Park ),박명환 ( Myung Hwan Park ),황순진 ( Soon Jin Hwang ) 한국하천호수학회(구 한국육수학회) 2013 생태와 환경 Vol.46 No.4
This study investigated the influence of temperature and CO2 increase on phytoplankton growth and community structure during cold water season (spring) in Lake Paldang, Korea. Four experimental treatments of temperature and CO2 manipulation were prepared in the laboratory batch culture: (1) Control; ambient low temperature (6±2.C) and low CO2 (air level, 400 mg L-1), (2) T1; low temperature and high CO2 (800 mg L-1), (3) T2; high temperature (20±2.C) and low CO2, (4) T3; high temperature and high CO2. Algal growth experiment was carried out for 10 days under the light intensity of 70 μmol m-2 s-1 (L:D=24 : 0). The level of pH decreased in both T1 and T3, due to dissolution of added CO2. The dominant phytoplankton species of ambient water, Cyclotella meneghiniana succeeded to Fragilaria capucina var. gracilis in high-temperature treatment groups (T2 and T3). Cyanobacteria were very rare at the beginning of the experiment, while Oscillatoria limnetica appeared in only high-temperature groups (T2 and T3) at 6~7th day. CO2 addition in ambient temperature (T1) induced the highest phytoplankton growth, and thereby producing the highest average cell density of 3.27±0.33 104 cells mL-1, followed by T2 (2.65±0.26 104 cells mL-1), T3 (2.09±0.16 104 cells mL-1), and Control (1.86±0.13 104 cells mL-1) (F=7.167, p=0.000). In summary, temperature increase changed the phytoplankton community structure and CO2 increase promoted the phytoplankton growth during the cold spring season in Lake Paldang, suggesting a potential effect of climate change on freshwater phytoplankton.