• ALGAE
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• 제30권3호
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• pp.197-205
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• 2015

The genus of leafy green algae, Prasiola Meneghini, includes marine, terrestrial, and freshwater species. A total of 11 species and one variety have been identified in China, Korea, and Japan. In Korea, Prasiola formosana var. coreana has been reported in Muncheon, North Korea, while a different type of Prasiola species has been reported in South Korea. The South Korean species has been found growing along a small stream originating from Chodanggul Cave, a limestone cave in Samcheok, Gangwon Province. Here, we revised the morphological characteristics of the South Korean Prasiola species and analyzed plastid rbcL, psaB, and tufA genes to clarify its identity. Although the external and anatomical morphologies varied among individuals, our results were very similar to previous reports. Plastid three genes sequences of the South Korean specimens were identical to those of P. japonica collected from Japan as well as to published sequences of P. yunnanica from China. A short rbcL-3P sequence (196 bp) from P. formosana var. coreana, which was identified in the type specimen, was also identical to a sequence from P. japonica. These Prasiola species and variety from Korea, Japan, and China are all distributed in areas characterized by limestone bedrock. Based on morphological, phylogenetic, and distributional features, the South Korean Prasiola species is regarded herein as P. japonica. Here, we also propose to synonymize P. formosana var. coreana and P. yunnanica with P. japonica.

• 생태와환경
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• 제54권4호
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• pp.374-383
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• 2021

본 연구에서는 국내 유일의 민물김 서식지이며 생태·경관보전지역인 소한계곡의 저서성대형무척추동물 다양성을 분석하였다. 저서성대형무척추동물의 조사는 소한계곡의 발원지를 포함하여 총 3개 지점에서 계절 조사를 수행하였으며, 2011년에 수행된 과거 조사 자료와 비교하였다. 본 연구의 조사 결과, 총 2문 3강 7목 25과 42종의 출현이 확인되었으며, 개체수 및 종수는 2020년 삼척시에 직접적인 영향을 끼친 태풍 하이선, 마이삭의 영향으로 모든 조사지점에서 급격하게 감소하였다. 섭식기능군 분석 결과 주워먹는 무리의 비율이 전 조사지점에서 가장 높았으나, 가을철 최상류 구간에서 썰어먹는 무리의 비율이 13.4~42.4%로 증가하였다. 기존에 수행된 2011년 조사와 비교시 총 2문 3강 8목 22과 53종의 출현이 확인되어 본 연구보다 11종이 많이 출현하였다. 하루살이목, 강도래목, 날도래목의 종 및 개체수 비율이 조사연도와 관계없이 50% 이상을 차지하였으며, 하루살이목의 종수만 2.9종에서 6.7종으로 유의하게 증가하였다. 본 연구에서는 기존에 수행된 2011년과 비교하였을 때 저서성대형무척추동물의 다양성에 큰 변화는 확인되지 않았으나, 강수량 변화 등과 같은 기후영향에 따른 저서성대형무척추동물의 급감, 종조성 변화가 확인된 바 지속적인 모니터링을 통해 생태·경관보전지역인 소한계곡의 보전·관리 방안 마련을 위한 기초자료 확보가 필요한 것으로 판단된다.

• Fisheries and Aquatic Sciences
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• 제25권6호
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• pp.327-334
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• 2022

Marine resources have various biological activities and their constituents are more novel than those of land organisms. Several biologically active constituents have been found in marine organisms. Recently, many studies have reported that marine animals (MAs) can be used as functional ingredients in functional foods or nutraceutical due to their health benefits. However, no studies have extensively investigated the cosmeceutical activities of MAs extracts. Here, 70% ethanol extracts of 38 MAs were investigated for their activities of whitening and anti-aging properties for use as materials in novel cosmeceuticals. Anti-aging activities were determined by skin aging-related enzyme activities (anti-collagenase, anti-elastase, anti-hyaluronidase) and whitening activities (anti-tyrosinase, anti-3,4-dihydroxyl-L-phenylalanine [DOPA] oxidation) evaluated by colorimetric method. Among the 38 MAs, we found that Urechis unicinctus and Petrosia corticata extracts showed the strongest inhibitory effects against tyrosinase and DOPA oxidation, respectively. Our results additionally showed that Protankyra bidentata extract might provide a major source of anti-hyaluronidase and anti-elastase; meanwhile, anti-collagenase effects were similar in most MAs. Overall, these results suggest that extracts of marine animals have potential as a tyrosinase, collagenase, elastase, and hyaluronidase inhibitors. Taken together, MA resources could be considered as a novel cosmeceutical agent to be applied in cosmetic industry.