• 한국농공학회:학술대회논문집
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• 한국농공학회 2005년도 학술발표논문집
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• pp.655-660
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• 2005

This study was carried out to evaluate of water purification in oxidation pond with filamentous algae mat. It is the water treatment process in the small rural streams to remove the organic materials and nutrients. We used the filamentous algae mat(FAM) which selectively predominate the filamentous algae to prevent the additional contamination by algae outflow. The removal efficiencies of COD, SS, T-N and T-P in Oxidation Pond with Filamentous Algae Mat were -2.5%, 84.7%, 63.9% and 89.2%, respectively. The removal efficiencies of T-N and T-P which are nutrients index were high. Results of this study would help us to determine the possibility of using the water treatment on the contaminated small rural streams.

• ALGAE
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• 제19권1호
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• pp.31-37
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• 2004

Farmed kelp gametophytes were previously observed to be living endophytically in filamentous red algae. The interactions of two farmed kelp species and six red algae were examined in laboratory culture. Undaria pinnatifida (Harvey) Suringar and Laminaria religiosa Miyabe demonstrated the differing abilities of zoospores to become endophytic in four host red algae and neither kelp became endophytic in two non-filamentous red algae. There was a strong seasonal component regarding infectiousness that is associated with the changes in fron erosion in U. pinnatifida from April to June. At the same time, L. religiosa showed no significant changes in frond erosion, and there were no apparent changes in infection levels in the two species they were able infect. This study indicated clear differences between two keip species with regard to their symbiotic relationship to red algae in terms of host specificity and preference of kelp gametophytes.

• 한국해양학회지
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• 제21권1호
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• pp.25-33
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• 1986

미국 Texas 남쪽 해안에 위치한 Redfish Bay의 해초생태계에 우점종으로 나 타나는 4어종인 darter goby(Gobionellus bolesoma), pinfish(Lagodon rhomboides), code goby(Gobiosoma robustum), 그리고 Gulf pipefish(Syngnathus scovelli)에 대 한 성장에 따른 먹이 선택의 변화를 정량적으로 연구하였다. 가장 우점종인 darter goby는 비교적 다양한 먹이를 먹는 잡식성 어류로 amphipods, copepods, polychaetes, filamentous algae, diatoms 그리고 detritus등이 주된 먹이였다. 이 종 은 성장에 따른 먹이 선택의 변화가 크지 않았다. 반면에 pinfish, code goby 및 Gulf pipeifish는 성장함에 따라 먹이 종류가 크게 달라졌다. pinfish의 경우, 4단계 의 먹이 선택의 변화를 보이는데, 초기에는 육식성으로 주로 copepods를 섭식하였 으나, 조금 성장하면 주된 먹이가 amphipods로 바뀌며, 조금 더 성장하면 잡식성으 로 변해 filamentous algae, diatoms, amphipods 그리고 aolychaetes등의 다양한 먹 이를 먹으며, 그후 더욱 성장하면 seagrass와 seagrass위에 붙어있는 algae 그리고 그들의 debris를 주로 먹는 초식성으로 먹이 습성이 바뀌었다. code goby 와 Gulf popefish 는 비교적 적은 종류의 동물성 먹이에만 의존하는 육식성 어류들이었다.또한 두조은 비슷한 성장에 딸느 먹이 선택의 변화를 보이는데,초기에는 주로 copepods 를 섭이하였으나 성장함에 따라 점진적으로 보다 큰 amphipods로 먹이 선택이 바뀌었다.

• The Plant Pathology Journal
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• 제34권3호
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• pp.157-162
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• 2018

The objective of this work was to accomplish the isolation, molecular identification and characterizing the physiology of the causal agent of the algal spot in mango trees. For this purpose, the pathogen growth was assessed in different culture media, with subsequent observation and measurements of the filamentous cells. The molecular identification was made using mycelium obtained from leaf lesions and pure algae colonies grown in culture medium. Descriptions based on DNA sequencing indicated that the algae is Cephaleuros virescens. The algae must be isolated primarily in liquid medium for further pricking into agar medium. The highest mycelial growth average in Petri dishes occurred when the algae were grown in Trebouxia and BBM. Trebouxia enabled larger cells in the filamentous cells when compared to other culture media.

• Membrane and Water Treatment
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• 제10권3호
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• pp.191-199
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• 2019

In this study, we investigated the cultivation possibility using Hydrodictyon reticulatum in a continuous raceway pond as a tertiary sewage treatment plant. The cultivation possibility was evaluated by varying the light quantity, wavelength, and hydraulic retention time (HRT). Experimental results showed that the growth rates of algae and the removal efficiencies of nutrients increased as the light quantity increased, and the maximum photosynthetic rate was maintained at $100{\mu}mol/m^2{\cdot}s$ or higher. When wavelength was varied, nutrient removal efficiency and growth rate increased in the following order: green light, red light, white light, and blue light. The nutrient removal efficiencies and algae productivity in HRT 4 d were better than in HRT 8 d. We conclude that if Hydrodictyon reticulatum is cultivated in a raceway pond and used as a tertiary treatment facility in a sewage treatment plant, nutrients can be effectively removed, and production costs can be reduced.

• ALGAE
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• 제35권1호
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• pp.79-89
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• 2020

Pythium species are ubiquitous organisms known to be pathogens to terrestrial plants and marine algae. While several Pythium species (hereafter, Pythium) are described as pathogens to marine red algae, little is known about the pathogenicity of Pythium on marine green algae. A strain of a Pythium was isolated from a taxonomically unresolved filamentous Ulva collected in an intertidal area of Oslo fjord. Its pathogenicity to a euryhaline Ulva intestinalis collected in the same area was subsequently tested under salinities of 0, 15, and 30 parts per thousand (ppt). The Pythium isolate readily infected U. intestinalis and decimated the filaments at 0 ppt. Mycelium survived on U. intestinalis filaments for at least 2 weeks at 15 and 30 ppt, but the infection did not progress. Sporulation was not observed in the infected algal filaments at any salinity. Conversely, Pythium sporulated on infected grass pieces at 0, 15, and 30 ppt. High salinity retarded sporulation, but did not prevent it. Our Pythium isolate produced filamentous non-inflated sporangia. The sexual stage was never observed and phylogenetic analysis using internal transcribed spacer suggest this isolate belongs to the clade B2. We conclude that the Pythium found in the Oslo fjord was a pathogen of U. intestinalis under low salinity.

• 한국생태학회:학술대회논문집
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• 한국생태학회 1999년도 국제 Symposium 및 '99 춘계 공동 학술 발표대회
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• pp.79.1-79.1
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• 1999

• The Korean Journal of Ecology
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• 제27권3호
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• pp.173-177
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• 2004

갈조류 지충이의 표면에 부착하는 착생해조류의 종수, 풍부도, 부착위치 및 기능형을 조사하기 위하여 남해안 9개 무인도와 서해안의 격포 해안에서 2001년 여름에 지충이를 채취하였다. 지충이에 착생하는 해조류는 총 25종이 동정되었는데, 분류군 별로는 녹조류 6종(24%), 갈조류 2종(8%), 홍조류 17종(68%) 이었고 남해군의 장고섬, 노루섬, 소목과도에서 생육하는 지충이에 가장 많은 9종이 착생하였다. 착생 해조류 중에서 애기가시덤불, 구멍갈파래, 가위갯쇠털의 순으로 출현 빈도가 높았으며 애기가시덤불은 모든 해안에서 발견되었다. 또한 애기가시덤불, 두갈래사슬풀, 애기서실은 지충이 엽체의 하부에, 붉은실류는 상부에 부착하여 생육하였다. 기능형으로는 막상형 8%, 사상형 52%, 성긴분지형 32%, 유절석회조형 8%가 존재하였으며 각상형과 혁질형 해조류는 없었다. 위다년생인 지충이의 착생해조류는 봄과 여름에 관찰되는 바위두룩과 같은 종이나 사상형의 일년생 해조류가 주로 나타났으며, 유성생식을 하는 이들은 포자생성 및 방출을 숙주 해조류인 지충이의 엽체가 탈락되는 늦가을 이전에 일어난다.

• 한국수자원학회논문집
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• 제47권12호
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• pp.1135-1143
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• 2014

본 연구에서는 사상성 조류로 구성된 수질정화시설의 수질정화효율을 평가하고자 충남 서산시 음암면에 소재한 성암저수지 유입하천 홍수부지에 test-bed를 설치하고 유입하천수를 대상으로 현장적용실험을 실시하였다. 수질항목별로 정화효율을 평가한 결과, SS 80.9%, COD 74.6%, T-N 76.8%, T-P 84.4%, DTN 93.8%, DTP 98.3%의 제거효율을 보였다. 수온에 따른 정화효율은 수온이 약 $20^{\circ}C$로 유지되어 수질정화효율에 미치는 영향은 없는 것으로 나타났다. 수리학적 체류시간(HRT)은 SS 및 TP 처리효율과 유의한 상관성이 있는 것으로 나타났고, 체류시간을 5일로 했을 때 SS, TP 처리효율이 좋은 것으로 나타났다. 유입수의 COD/TN에 따른 처리효율은 TN, TP 모두 C/N비가 낮을수록 증가하였고, 유입수의 COD/TP에 따른 처리효율도 C/P비가 낮을수록 TN, TP 모두 처리효율이 증가하는 것으로 나타났다.

• Journal of Ecology and Environment
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• 제38권4호
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• pp.619-627
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• 2015

Cyanobacteria were sampled at five sites in the Han River, Nakdong River, and Geum River watershed from June 2014 to May 2015 and then cultivated. Two genera and five species of the cyanobacteria were newly recorded in Korea. The newly recorded species were Limnothrix redekei, Pseudanabaena galeata, Pseudanabaena amphigranulata, Sphaerospermopsis aphanizomenoides, and Calothrix parietina. As a result, the Korean flora of the cyanobacteria now include four orders, 22 families with 73 genera, 143 species, and two varieties, giving a total of 146 taxa.