• 한국수산과학회지
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• 제49권6호
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• pp.845-848
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• 2016

The effects of temperature and irradiance on the growth of Ulva prolifera O.F. $M{\ddot{u}ller$ (Chlorophyta), which has been used commercially as food in Korea, were examined in laboratory culture to conserve the strain. Experiments were conducted under combined factors of temperatures of 5, 10, 15, 20 and $25^{\circ}C$ and irradiances of 30, 50, 80 and $100{\mu}mol\;m^{-2}s^{-1}$. The maximum growth of the U. prolifera germlings was observed at $20^{\circ}C$ and $80{\mu}mol\;m^{-2}s^{-1}$, and the minimum growth was recorded at $5^{\circ}C$ and $100{\mu}mol\;m^{-2}s^{-1}$. Considering these results, the species appears to survive under wide ranges of temperature and irradiance, although growth is inhibited by high irradiances of over $100{\mu}mol\;m^{-2}s^{-1}$. This appears to be due to the in situ habitat niche of Ulva prolifera, which is the middle to lower intertidal zone. In conclusion, optimal conditions for the long-term conservation of Ulva prolifera can be established under relatively low temperatures ($5^{\circ}C$) and high irradiance ($100{\mu}mol\;m^{-2}s^{-1}$), while the optimal conditions for mass production are $20^{\circ}C$ and $80{\mu}mol\;m^{-2}s^{-1}$.

• ALGAE
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• 제29권4호
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• pp.267-277
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• 2014

Green tides occur every year in the Yellow Sea (YS), and numerous investigations are proceeding on various aspects of the phenomenon. We have identified bloom-forming species collected from diverse locations in the YS using morphological traits and the chloroplast gene for the large subunit of ribulose-1,5-bisphosphate carboxylase (rbcL). Morphological and rbcL sequence data analyses characterized the blooming species on both sides of the YS as belonging to the Ulva linza-procera-prolifera (LPP) complex clade or U. prolifera of earlier reports. However, U. procera within the LPP complex must be regarded as synonym of U. linza. Moreover, U. prolifera in free-floating samples collected from the Qingdao coast in 2009 was clearly in a distinct clade from that of the blooming species. Therefore, U. linza is the main green tide alga in the YS and has the procera-morphology. The green drift mats in the southeastern part of the YS (southwest sea of Korea) consisted predominantly of U. linza and rarely of U. compressa or U. prolifera.

• Ocean and Polar Research
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• 제32권4호
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• pp.351-359
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• 2010

This study examined extensive patches of floating green macroalgal (Ulva prolifera) mats in the northern East China Sea (ECS) using satellite images from mid May through July 2008 and field observation made during early August 2008 cruise. It was previously reported that the massive macroalgal blooms occurred in the coastal areas of Qingdao in China. During our field survey, researchers noticed widely distributed floating patches of macroalgal mats ranging in size from tens of centimeters to a few hundred meters in diameter. Meteorological data in the northern ECS showed high irradiance, high air-temperature, and predominant southerly winds in summer. In the study area during the survey period, surface waters were characterized by the Changjiang Diluted Water (CDW) mass, which contained high concentrations of nitrate and phosphate. The internal transcribed spacer (ITS) sequence of U. prolifera found in the northern ECS was the same as those of U. prolifera sampled from Qingdao blooms, suggesting a possibility that U. prolifera found in two regions would be derived from the same origin. We suggest that U. prolifera in the nearshore Jiangsu Province drifted into the northern ECS and proliferated under favorable meteorological and oceanographic conditions during the summer of 2008.

• ALGAE
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• 제33권4호
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• pp.329-340
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• 2018

The present study was to determine the effects of salinity on the growth and nutrient bioextraction abilities of Gracilaria and Ulva species, and to determine if these seaweeds can be used for nutrient bioextraction under hypo- and / or hyperosmotic conditions. Two Gracilaria species, G. chorda and G. vermiculophylla, and two Ulva species, U. prolifera and U. compressa, were cultured at various salinity conditions (5, 10, 15, 20, 30, 40, and 50 psu) for 3 weeks. Results showed that the growth rates, nutrient uptake, tissue nutrient contents and nutrient removal were significantly affected by salinity and species. All four species were euryhaline with the highest growth rates at 20 psu. Among the four species, U. prolifera, U. compressa, and G. vermiculophylla showed potential to be used for nutrient bioextraction in estuaries and / or land-based fish farms due to their rapid growth, high nutrient uptake, high tissue carbon and nitrogen accumulation and removal capacities.

• 한국수산과학회지
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• 제47권5호
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• pp.522-526
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• 2014

Pyropia, economic red algae species, have been cultivated in Korea (referred to as 'gim'), Japan ('nori'), and China ('zicai') for over 300 years. Vegetable seaweed Pyropia species are sold in the public markets in various forms as commercial seafoods. In Korea, two kinds of Pyropia seafood made with species of Pyropia and Ulva (sea lettuce, referred to as 'parae') are also sold. These are referred to as 'parae-gim' (with Pyropia spp. and U. linza) and 'gamtaegim' (with Pyropia spp. and U. prolifera). There is currently no method for identifying the seaweed species that comprise Pyropia seafood products. Therefore, we developed novel molecular markers to identify Ulva species in commercial Pyropia seafoods. Based on rbcL molecular markers, we identified informative characteristics to discriminate U. linza and U. prolifera as seafood ingredients. Moreover, PCR with 3'-end mismatch primers successfully isolated the specific rbcL sequences of U. linza and U. prolifera from Pyropia seafoods. Therefore, our novel molecular markers will be useful for identifying the ingredient species of commercial seafoods.

• 환경생물
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• 제39권1호
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• pp.81-87
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• 2021

2008년 4월부터 2009년 3월까지 1년간 우리나라 서남해안 함평만의 도리포에서는 조간대의 해조류 식물 군집과 가입리에서는 식용 해조류 가시파래의 월별 변동성을 매월 조사하였다. 조사된 해조류는 총 22종이었으며, 녹조류 5종, 갈조류 4종 그리고 홍조류 13종이었다. 함평만 도리포 암반 조간대에서 연간 우점하는 해조류는 구멍갈파래였고, 준 우점종은 잎파래와 애기가시덤불이었다. 조간대 상부에서 하부에 이르는 수직분포는 잎파래 - 애기가시덤불 - 구멍갈파래 - 지충이었다. 가시파래의 생물량은 6월에 최대를 보였고 11월에 최소를 보였으며, 2.4-98.2 g dry wt. m^-2 범위를 나타냈다. 가시파래의 생물량은 수온과 연관이 있어 보이지만 영양염류 및 빛의 강도 같은 기타 환경요인과의 관계는 추후 지속적인 연구가 요구된다.

• ALGAE
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• 제22권3호
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• pp.201-207
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• 2007

For getting primary cue of restoration, the algal flora and intertidal community structure of Deokjeokdo, Yeonpyeongdo and Ganghwado were investigated for from February to November 2006. The total of 28 species, including five Chlorophytes, five Phaeophytes, 17 Rhodophytes and one sea grass were identified. The occurrence of species according to sampling site was 22 species in Deokjeokdo, seven species in Yeonpyeongdo and four species in Ganghwado. Among them Gloiopeltis furcata, Ulva pertusa and Sargassum horneri in Deokjeokdo, Scytosiphon lomentaria in Yeonpyeongdo, Enteromorpha prolifera in Ganghwado were ominants. The algal zonation of intertidal zone was figured out by Gloiopeltis furcata, Caulacanthus okamurae – Corallina pilulifera – Ulva pertusa, Ahnfeltiopsis flabelliformis, Sargassum horneri, Undaria pinnatifida in Deokjeokdo, Bangia atropurpurea – Scytosiphon lomentaria – Ahnfeltiopsis flablleiformis in Yeonpyeongdo from upper to lower zone and Enteromorpha prolifera, Enteromorpha linza – Sargassum thunbergii, Myelophycus simplex in Ganghwado from middle to lower zone. The average of biomass was measured as 80.6 g dry wt. m–2 in Deokjeokdo, 32.2 g dry wt. m–2 in Yeonpyeongdo and less than 1 g dry wt. m–2 in Ganghwado.

• 환경생물
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• 제30권3호
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• pp.193-199
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• 2012

We performed qualitative and quantitative surveys on the distribution of seaweed species and dominant species with their standing crop and temporal variations in Hauido tidal flats in order to understand the role of seaweeds in a coastal wetland ecological system that may be used for conservation and management of coastal wetland ecological system. A total of 9 species were found at 7 stations of the study area; 4 species of Chlorophyta (Ulva compressa, U. prolifera, U. pertusa and Ulothrix flacca), 3 species of Phaeophyta (Ectocarpus arctus, Scytosiphon lomentaria and Myelophycus simplex) and 2 species of Rhodophyta (Gracilaria verrucosa and Caulacanthus okamurae). Major dominant species were U. compressa, U. prolifera and U. pertusa (Chlorophyta), Scytosiphon lomentaria (Phaeophyta) and Gracilaria verrucosa (Rhodophyta). Standing crops of U. compressa and U. prolifera were $2.94{\sim}45.25g{\cdot}dw{\cdot}m^{-2}$ and $6.19{\sim}91.9g{\cdot}dw{\cdot}m^{-2}$, respectively, in spring. Seaweed habitat was characterized by textural differences that the percentage of coarse particles and organic material were a little higher in seaweed flourishing areas than in seaweed barren areas.

• 한국어업기술학회:학술대회논문집
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• 한국어업기술학회 2001년도 춘계 수산관련학회 공동학술대회발표요지집
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• pp.205-206
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• 2001

녹조류 중 갈파래(Ulva sp.)는 유럽에서도 오래전부터 식용으로 이용되어 다양한 식품학적 및 생리 기능성에 관한 연구가 진행되어 오고 있다. 갈파래의 주요 특성의 하나는 육상 식물과 달리 황산기를 함유한 다당을 다량 함유하고 있으며, 이 산성 다당은 항종양성, 항 virus성, 면역활성증간 항혈액 응고작용 등이 보고되어 있으며, 국내에서도 홑파래에서 추출한 당단백질이 Sarcoma-180 cell에 대한 항암효과 및 면역활성이 있다고 보고된 바 있다(이 등, 1992). (중략)

• 환경생물
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• 제31권2호
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• pp.78-86
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• 2013

2010년 3월부터 2010년 12월까지 화원관광단지의 인공해빈에서 해조상의 계절적 변화에 대한 정성 및 정량조사를 실시하였다. 해조 식생의 계절적 변화는 인근의 자연서식지의 식생과 비교하였다. 인공해빈에서는 녹조류 8종, 갈조류 3종 및 홍조류 4종으로 총 15종의 해조류가 출현하였으며, 자연서식지에서는 녹조류 7종, 갈조류 9종 및 홍조류 22종으로 총 38종의 해조류가 출현하였다. 우점종은 인공해빈의 경우 겨울철에 Ulva compressa, U. intestinalis, U. prolifera, U. pertusa, 여름철에는 Urospora penicilliformis, U. intestinalis, U. compressa였으며, 자연서식지의 경우 겨울철에 U. pertusa, U. compressa, 여름철에 Sargassum thunbergii, Ishige okamurae였다. (R+C)/P 지수는 인공해빈에서 3.7~4.0, 자연서식지에서 2.6~3.4로 나타났다. 인공해빈의 해조 기능형군별 비율은 사상형 64.4%, 엽상형 21.9%, 분지형 13.7%로 분석되어 자연서식지의 기능형군별 비율과는 유의한 차이를 나타내었다.